SNTI

Secured strategic financing vehicle for up to $40 million Positive FDA feedback supports single-arm pivotal trial for potential registration of SENTI-202 in initial indication of Relapsed/Refractory Acute Myeloid Leukemia (R/R AML) Continued operational streamlining contributed to substantially reduced quarterly net loss and cash burn SOUTH SAN FRANCISCO, Calif., May 14, 2026 (GLOBE NEWSWIRE) -- Senti Biosciences Holdings, Inc. (Nasdaq: SNTI) (Senti Bio), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the first quarter ended March 31, 2026, and provided recent business highlights. “We entered 2026 with a clear focus on advancing SENTI-202 and extending our operational runway while positioning the company for its next phase of clinical development,” said Timothy Lu, M.D., Ph.D., Chief Executive Officer and Co-Founder of Senti Bio. “Since the start of the year, we have made meaningful progress across each of these priorities, including a positive regulatory engagement with the FDA on SENTI-202 - a Regenerative Medicine Advanced Therapy (RMAT) designated product - regarding the study design for the planned pivotal trial, execution of a strategic financing agreement that could provide up to $40 million in capital, and continued reductions in operating expenses and cash burn.” Dr. Lu added, “We believe the recent FDA interactions and feedback represent an important milestone for the program and further support the potential of SENTI-202 in relapsed/refractory hematologic malignancies. We remain focused on advancing SENTI-202 efficiently toward the next stage of pivotal development in R/R AML and exploring future combinations with standard of care chemotherapy in newly diagnosed AML patients. We also aim to use our differentiated gene circuit platform to create therapies for additional ex vivo and in vivo CAR therapies.” Recent Business Highlights SENTI-202 Program Update Senti Bio concluded a Type B Initial Comprehensive Multidisciplinary RMAT meeting with FDA. Based on the positive outcome of this meeting, Senti Bio has finalized its pivotal clinical and chemistry, manufacturing and controls (CMC) strategy for SENTI-202, which includes a single-arm, multi-center pivotal trial to support registration in R/R AML with SENTI-202 administered after LD chemotherapy. The Company believes the FDA interaction supports continued advancement of SENTI-202 and provides important clarity around a potential registrational development strategy. In addition, Senti announced that it identified a specific Donor X attribute that correlates with efficacy of SENTI-202, with 50% (7/14) of the patients achieving a composite CR (cCR) when they received any SENTI-202 doses manufactured from Donor X-characteristic derived NK cells in Cycle 1. The Donor X attribute is found in ~50% of adult donors, is independent of HLA or KIR matching, and will be used in all future SENTI-202 manufacturing, thus supporting SENTI-202’s allogeneic off-the-shelf usage. Senti Bio also announced that SENTI-202 continues to achieve durable MRD-negative responses in the full 22 patient Phase 1 trial that compares favorably with current FDA approved therapies for R/R AML. Additional details can be found on Senti Bio’s website. Strategic Financing Agreement In April 2026, Senti Bio entered into a securities purchase agreement with an affiliate of Celadon Partners SPV 24, pursuant to which Senti Biosciences, Inc., the Company’s wholly owned subsidiary, may issue up to $40 million aggregate principal amount of senior secured convertible notes in up to two tranches. The financing includes: An initial $10 million tranche, expected to close in May subject to specified closing conditions; An additional tranche of up to $30 million, subject to investor election and additional conditions; and Future potential contingent value rights tied to regulatory and commercial milestones for SENTI-202 that could provide up to an aggregate of $60 million in additional value to stockholders. The Company expects to use proceeds from the financing to support general corporate purposes and advance clinical and manufacturing activities for SENTI-202. Operational and Financial Restructuring Progress During the first quarter, Senti Bio completed amendments to its Alameda lease and related GeneFab sublease arrangements, significantly reducing future lease obligations and streamlining operations. These actions contributed to a $6.9 million gain from lease modification during the quarter and are expected to further reduce the Company’s ongoing operating expense profile. First Quarter 2026 Financial Results Cash Position: Cash and cash equivalents were $8.9 million as of March 31, 2026, compared to $16.4 million as of December 31, 2025. Research and Development Expenses: Research and development expenses were $5.3 million for the first quarter of 2026, compared to $9.3 million for the same period in 2025. The decrease was primarily driven by lower external services and supplies costs. General and Administrative Expenses: General and administrative expenses were $6.2 million for the first quarter of 2026, compared to $7.1 million for the same period in 2025. The decrease was primarily driven by lower external services and supplies costs. Net Loss: Net loss was $4.2 million, or $0.14 per basic and diluted share, for the first quarter of 2026, compared to a net loss of $14.1 million, or $1.41 per basic and diluted share, for the first quarter of 2025. Net loss for the three months ended March 31, 2026 included non-cash stock-based compensation expense of $1.3 million, offset by a non-recurring $6.9 million gain on lease modification. Cash Burn: Net cash used in operating activities was $7.5 million during the first quarter of 2026, compared to $14.1 million during the same period in 2025, reflecting continued operational discipline and restructuring actions. About SENTI-202 SENTI-202 is the first Logic Gated off-the-shelf CAR-NK cell therapy product candidate designed to selectively target and eliminate CD33 and/or FLT3 expressing hematologic malignancies, such as AML and myelodysplastic syndrome (MDS), while sparing healthy bone marrow cells. SENTI-202 has three main components. First, SENTI-202 contains an OR GATE, which is an activating CAR that recognizes and kills CD33 and FLT3 expressing cells. By targeting either or both of these antigens, SENTI-202 is designed to effectively kill both leukemic blasts (that largely express CD33) and leukemic stem cells (that predominantly express FLT3), which constitute a difficult-to-eradicate reservoir of AML disease. Second, SENTI-202 contains a NOT GATE, which is an inhibitory CAR that is designed to recognize EMCN selectively expressed on healthy hematopoietic stem and progenitor cells and protect those healthy cells from being killed even if they express CD33 and/or FLT3, thus potentially widening the therapeutic window. Third, SENTI-202 contains calibrated-release IL-15, which is designed to significantly increase cell persistence, expansion and activity of both the CAR-NK cells and host immune cells. The NK cells used to construct SENTI-202 are sourced from selected healthy adult donors, manufactured, cryopreserved and available off-the-shelf for use as needed. Senti Bio is currently enrolling adult patients with R/R CD33 and/or FLT3 expressing heme malignancies in a Phase 1 clinical trial for SENTI-202, which can be a potential first-in-class allogeneic treatment for AML/MDS patients. The U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation (ODD) and Regenerative Medicine Advanced Therapy (RMAT) designation to SENTI-202 for the treatment of relapsed/refractory hematologic malignancies including AML. About Senti Bio Senti Bio is a clinical stage biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline comprises cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti Bio’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s future results. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s , clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent annual report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences Holdings, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

SOUTH SAN FRANCISCO, Calif., March 27, 2026 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the fourth quarter of 2025 and full year 2025 and provided a summary of recent pipeline and corporate highlights. “2025 was a year of important progress for Senti as we continued to advance our mission of developing next-generation cell and gene therapies powered by our synthetic biology platform. Over the past year, we have strengthened the clinical and translational foundation of our pipeline, with SENTI-202 as the lead program generating positive clinical data, while continuing to refine and expand the capabilities of our Gene Circuit platform. We remain focused on disciplined execution, advancing our key programs toward critical development milestones and positioning Senti to deliver smarter, more selective medicines for patients with serious diseases. I am proud of our team’s commitment and believe the progress we made in 2025 positions us well for the opportunities ahead,” commented Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences. RECENT PIPELINE AND CORPORATE UPDATES Reported updated positive preliminary clinical data from the ongoing Phase 1 trial of SENTI-202 in relapsed/refractory acute myeloid leukemia (AML), demonstrating encouraging response rates, durability, and a favorable safety profile; Received Regenerative Medicine Advanced Therapy (RMAT) designation from the U.S. Food and Drug Administration for SENTI-202 for the treatment of adults with relapsed or refractory AML; Continued advancement of the Company’s pipeline and synthetic biology platform, including progress across its Gene Circuit–engineered cell therapy programs; and Maintained focus on disciplined capital management to support pipeline execution and key development milestones. YEAR 2025 FINANCIAL RESULTS Cash and Cash Equivalents: As of December 31, 2025, Senti Bio held cash and cash equivalents of approximately $16.4 million. R&D Expenses: Research and development expenses were $7.8 million for both of the three months ended December 31, 2025 and 2024, respectively. For the full year of 2025, research and development expenses were $37.6 million. G&A Expenses: General and administrative expenses were $5.8 million and $8.4 million for the quarter ended December 31, 2025 and 2024, respectively. The decrease of $2.6 million was primarily due to a decrease of $2.3 million in external services and supplies cost and a decrease of $0.7 million in facilities and other costs, partially offset by an increase of $0.4 million in personnel-related expenses. For the full year of 2025, general and administrative expenses were $26.2 million. Net Loss: Net loss was $14.5 million, or $0.53 per basic and diluted share, for the three months ended December 31, 2025. Net loss for the full-year 2025 was $61.4 million, or $2.73 per share. Net loss for the year ended December 31, 2025 included a non-recurring $5.1 million impairment of long-lived assets as well as non-cash stock-based compensation expense of $5.7 million. About Senti Bio Senti Bio is a clinical stage biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline comprises cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s future results. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s , clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

SOUTH SAN FRANCISCO, Calif., Nov. 13, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the third quarter of 2025 and provided a summary of recent pipeline and corporate highlights. “Our team is laser focused on driving SENTI-202 clinical development forward. With important milestones achieved in the third quarter, we continue to execute on our dose expansion phase and on enrolling additional patients with relapsed/refractory AML at the Recommended Phase 2 Dose,” commented Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences. “At the upcoming ASH Annual Meeting in December, we will be presenting exciting clinical data from additional patients with R/R AML who have received SENTI-202, showcasing continued efficacy, safety, and durability. This data will highlight the ability of our Logic Gate technology to achieve selective cancer killing and healthy tissue sparing, which overcomes a central challenge in the treatment of cancer. We are pleased with the progress made to date and look forward to discussing our expanded dataset next month.” DRIVING TOWARDS NEXT DATA MILESTONE FOR PHASE 1 SENTI-202 STUDY IN AML Recently announced that abstracts detailing certain clinical and correlative results for SENTI-202 were accepted for oral and poster presentations, respectively, at the upcoming American Society of Hematology (ASH) Annual Meeting to be held December 6-9, 2025 in Orlando Florida. At the conference, the Company plans to present updated clinical data from the patients included in the published abstracts, as well as additional patients’ clinical data from a more recent data-cut. Senti will also host a live webcast during the meeting to discuss the results. Additional details to follow. Details for the Company’s ASH abstracts and oral presentation can be found here: Senti Bio to Present Updated Clinical Results of First-in-Class Logic Gated CD33/FLT3 Cell Therapy, SENTI-202, at the American Society of Hematology (ASH) Annual Meeting 2025. CONTINUED ACTIVITIES TO BUILD MARKET AWARENESS AND INCREASE VISIBILITY AMONG THE INVESTOR AND SCIENTIFIC COMMUNITIES Participated in the Webull Financial Corporate Connect Webinar Series Biotech/MedTech event, as well as other key investor conferences, including the H.C. Wainwright 27th Annual Global Investment Conference, the MedInvest Biotech & Pharma Conference, BioJapan, and Chardan’s 9th Annual Genetic Medicines Conference; and Participated in a Virtual Investor “What This Means” segment to discuss the recommended Phase 2 dose and schedule selection for SENTI-202 in its clinical trial for Acute Myeloid Leukemia. Visit virtualinvestorco.com/snti to watch all the latest segments. THIRD QUARTER 2025 FINANCIAL RESULTS Cash and Cash Equivalents: As of September 30, 2025, Senti Bio held cash and cash equivalents of approximately $12.2 million compared to $48.3 million as of December 31, 2024. R&D Expenses: Research and development expenses were $10.5 million and $8.7 million for the three months ended September 30, 2025 and 2024, respectively. The increase of $1.8 million was primarily due to an increase of $1.4 million in external services and supplies cost and an increase of $0.7 million in personnel-related expenses, offset by a decrease of $0.3 million in facilities and other costs. G&A Expenses: General and administrative expenses were $6.4 million and $6.6 million for the three months ended September 30, 2025 and 2024, respectively. The decrease of $0.2 million was primarily due to a decrease of $0.7 million in external services and supplies cost and a decrease of $0.6 million in facilities and other costs, partially offset by an increase of $1.1 million in personnel-related expenses. Net Loss: Net loss was $18.1 million, or $0.69 per basic and diluted share, for the three months ended September 30, 2025. About Senti Bio Senti Bio is a clinical-stage biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline comprises cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s growth, strategy, progress and timing of its clinical trials for SENTI-202; the timing of availability of data from the ongoing Phase 1 clinical trial of SENTI-202; the ability of any product candidate to perform in humans in a manner consistent with nonclinical, preclinical or previous clinical study data; expectations regarding the anticipated dosing of patients and availability of data from clinical trials, and the timing thereof. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical trial startup, clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

Two presentations, including one oral session, build on existing data and show deep and durable clinical remission rates, combined with a strong safety profile, for SENTI-202 in treating relapsed/refractory Acute Myeloid Leukemia (AML) Pharmacodynamic data further underscore clinical proof-of-mechanism for 'OR/NOT' Logic Gate, showing selective killing of leukemic blasts and leukemic stem cells (LSCs) while sparing healthy hematopoietic stem and progenitor cells (HSPCs) Updated clinical results continue to showcase the potential of Senti Bio’s Logic Gate technology to overcome a central challenge in treating cancers - achieving selective cancer killing and healthy tissue sparing Senti Bio will present data from additional clinical trial participants and longer follow-up at the ASH presentations and in a live webcast during the ASH meeting in December SOUTH SAN FRANCISCO, Calif., Nov. 03, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today announced that it will deliver two presentations, including one oral, on its SENTI-202 clinical program, at the 67th American Society of Hematology (ASH) Annual Meeting and Exposition being held December 6-9, 2025 in Orlando, Florida. Senti Bio will also host a live webcast to discuss the latest data during the annual meeting. “Relapsed/refractory AML is a disease with poor prognosis. There is a tremendous unmet need for effective medicines that can aggressively kill cancer cells while protecting normal cells. With this in mind, we designed our Logic Gate technology to kill AML cells displaying CD33 OR FLT3 cancer targets and to spare normal cells displaying the EMCN healthy target even if they express CD33 and/or FLT3,” commented Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences. “At ASH, we’re thrilled to present an expanding body of evidence, with more patients and more follow-up data, that continues to demonstrate the potential for the industry's first cell therapy that makes complex, autonomous decisions to transform the relapsed/refractory AML treatment landscape, as well as to open the door to more aggressive, yet safe therapies for other hard-to-treat cancers.” Details of the oral and poster sessions are available on the ASH website and below: Session Type: Oral Session Number: abs25-10130 Abstract Title: Promising results from an ongoing Phase I multicenter study of senti-202, a first-in-class, CD33 and/or FLT3 & not endomucin (EMCN), selective off-the-shelf logic gated CAR NK cell therapy in adults with Relapsed/Refractory Acute Myeloid Leukemia (R/R AML) Session Date: December 8, 2025 Session Time: 4:30 PM - 6:00 PM Presentation Time: 5:45 PM - 6:00 PM Room: OCCC - Valencia Room W415BC Session Type: Poster Abstract Number: abs25-2711 Abstract Title: Correlative data from an ongoing Phase 1, multicenter study of senti-202, a first-in-class, CD33 and/or FLT3 & not endomucin (EMCN), selective off-the-shelf CAR NK cell therapy for Acute Myeloid Leukemia (AML) is consistent with its clinical activity and unique logic gated mechanism of action Session Date: December 8, 2025 Session Time: 6:00 PM - 8:00 PM Presentation Time: 6:00 PM - 8:00 PM Room: OCCC - West Halls B3-B4 Session: 704 About SENTI-202 SENTI-202 is the first Logic Gated off-the-shelf CAR-NK cell therapy product candidate designed to selectively target and eliminate CD33 and/or FLT3 expressing hematologic malignancies, such as AML and myelodysplastic syndrome (“MDS”), while sparing healthy bone marrow cells. SENTI-202 has three main components. First, SENTI-202 contains an OR GATE, which is an activating CAR that recognizes and kills CD33 and FLT3 expressing cells. By targeting either or both of these antigens, SENTI-202 is designed to effectively kill both leukemic blasts (that largely express CD33) and leukemic stem cells (that predominantly express FLT3), which constitute a difficult-to-eradicate reservoir of AML disease. Second, SENTI-202 contains a NOT GATE, which is an inhibitory CAR that is designed to recognize EMCN selectively expressed on healthy hematopoietic stem and progenitor cells and protect those healthy cells from being killed even if they express CD33 and/or FLT3, thus potentially widening the therapeutic window. Third, SENTI-202 contains calibrated-release IL-15, which is designed to significantly increase cell persistence, expansion and activity of both the CAR-NK cells and host immune cells. The NK cells used to construct SENTI-202 are sourced from selected healthy adult donors, manufactured, cryopreserved and available off-the-shelf for use as needed. Senti Bio is currently enrolling adult patients with R/R CD33 and/or FLT3 expressing heme malignancies in a Phase 1 clinical trial for SENTI-202, which can be a potential first-in-class allogeneic treatment for AML/MDS patients. Earlier this year, the U.S. Food and Drug Administration (FDA) granted Orphan Drug Designation to SENTI-202 for the treatment of relapsed/refractory hematologic malignancies including AML. About AML1,2 AML is a cancer of the blood and bone marrow and is one of the most common types of acute leukemia in adults. It is estimated there will be 22,010 new cases of AML in the United States in 2025. At diagnosis, the five-year survival rate for these patients is approximately 32.9%. Newly diagnosed AML is currently treated with chemotherapy, targeted therapies, and/or allogeneic or autologous stem cell transplant. For patients with R/R AML, there are few treatment options and median overall survival is typically approximately five months. About Senti Bio Senti Bio is a biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline is comprised of cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s future results. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s , clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected] Press Contact: Shira Derasmo Cuttlefish Communications +1 917-280-2497 [email protected] ______________________________ 1National Cancer Institute. “Acute Myeloid Leukemia - Cancer Stat Facts.” SEER, 2025, seer.cancer.gov/statfacts/html/amyl.html. 2Brandwein, Joseph M, et al. “Outcomes of Patients with Relapsed or Refractory Acute Myeloid Leukemia: A Population-Based Real-World Study.” American Journal of Blood Research, vol. 10, no. 4, 2020, pp. 124–133, pubmed.ncbi.nlm.nih.gov/32923092/.

SOUTH SAN FRANCISCO, Calif., Aug. 07, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the second quarter of 2025 and provided a summary of recent pipeline and corporate highlights. “Our team has continued to advance SENTI-202’s clinical development. We have now completed dose finding and have confirmed the recommended Phase 2 dose (RP2D), which is an important step in our Phase 1 study. We are currently in the dose expansion phase, enrolling additional patients with relapsed/refractory AML at the RP2D. Additionally, we recently received Orphan Drug Designation for SENTI-202 and bolstered the leadership and expertise of our team, welcoming new key members to our Scientific Advisory Board and our Board of Directors,” commented Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences. “Looking ahead, we are focused on growing our pipeline opportunities to deliver transformative therapies to patients with currently limited options and, importantly, expect to release additional efficacy and durability data from our ongoing Phase 1 study before the end of the year, representing a significant milestone for our lead program.” RECENT PIPELINE AND CORPORATE UPDATES Completed dose finding phase and confirmed the recommended Phase 2 dose (RP2D) in its ongoing Phase 1 clinical trial of SENTI-202 (NCT06325748) for the treatment of relapsed/refractory hematologic malignancies including AML; Granted U.S. FDA Orphan Drug Designation for use of SENTI-202 to treat AML; Received an additional $1.0 Million tranche from California Institute for Regenerative Medicines (CIRM) grant for advancing clinical development of SENTI-202; and Bolstered expertise of leadership team with the appointment of Bryan Baum to the Board of Directors and Dr. James B. Trager to the Scientific Advisory Board. CONTINUED ACTIVITIES TO BUILD MARKET AWARENESS AND INCREASE VISIBILITY AMONG THE INVESTOR AND SCIENTIFIC COMMUNITIES Participated in Nasdaq's Amplify Spotlight Series to provide a corporate overview and highlight how Senti is leveraging its proprietary Gene Circuit platform to develop next-generation cell and gene therapies for the treatment of challenging liquid and solid tumor indications. Watch the segment here. Presented at premier scientific conferences including the 2025 Synthetic Biology: Engineering, Evolution, & Design (SEED) Conference and BioScience Forum; Participated in a virtual fireside chat hosted by Chardan Capital Markets, LLC as well as virtual biotech investment webinar hosted by Webull Corporate Connect; and Participated in several Virtual Investor events and segments. Visit virtualinvestorco.com/snti to watch the latest. SECOND QUARTER 2025 FINANCIAL RESULTS Cash and Cash Equivalents: As of June 30, 2025, Senti Bio held cash and cash equivalents of approximately $21.6 million compared to $48.3 million as of December 31, 2024. R&D Expenses: Research and development expenses were $10.0 million and $9.2 million for the three months ended June 30, 2025 and 2024, respectively. The increase of $0.8 million was primarily due to an increase of $0.8 million in external services and supplies cost. G&A Expenses: General and administrative expenses were $6.8 million and $4.2 million for the three months ended June 30, 2025 and 2024, respectively. The increase of $2.6 million was primarily due to an increase of $2.5 million in personnel-related expenses and an increase of $0.2 million in external services and supplies cost, partially offset by a decrease of $0.1 million in facilities and other costs. Net Loss: Net loss was $14.7 million, or $0.56 per basic and diluted share, for the three months ended June 30, 2025. About Senti Bio Senti Bio is a biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline is comprised of cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s growth, strategy, progress and timing of its clinical trials for SENTI-202;the timing of availability of data from the ongoing Phase 1 clinical trial of SENTI-202; the ability of any product candidate to perform in humans in a manner consistent with nonclinical, preclinical or previous clinical study data; expectations regarding the anticipated dosing of patients and availability of data from clinical trials, and the timing thereof. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s clinical trial start up, clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical trial startup, clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

Positive Phase 1 data from lead program, SENTI-202, recently presented at the AACR Annual Meeting: SENTI-202 was generally well tolerated, preliminary RP2D identified; 4 of 7 patients achieved composite Complete Remission (cCR) (3 CR, 1CRh), all 4 cCR patients were measurable residual disease (MRD) negative as assessed by local standard of care; All cCR patients maintaining responses, from 4+ to 8+ months ongoing Ongoing enrollment in Phase 1 SENTI-202 study to confirm the preliminary recommended Phase 2 dose (RP2D) followed by disease specific expansion cohorts Logic-Gated cell therapy approach may have the potential for broad liquid and solid tumor applications, providing multiple pipeline expansion opportunities SOUTH SAN FRANCISCO, Calif., May 06, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio” or the “Company”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the first quarter of 2025 and provided a summary of recent pipeline and corporate highlights. “We continue to be encouraged by our SENTI-202 data and strongly believe in its potential to provide a much-needed treatment option for patients with AML. Notably, our recent data at AACR showed early deep responses seen with SENTI-202 across dose levels, with 4+ to 8+ months of durability noted and growing. We are pleased with the progress made to date, with our team remaining focused on the successful execution of this trial and further SENTI-202 development,” commented Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences. “Beyond our prioritized SENTI-202 program in AML, we are continuing to advance our potential best-in-class Logic-Gated programs with additional discovery efforts for solid tumors, in order to continue building value in the near and long-term.” RECENT PIPELINE AND CORPORATE UPDATES New Positive Data for Lead Program SENTI-202 Drives Confidence as a Potential Treatment Option for Acute Myeloid Leukemia (AML): The Company presented positive data from its ongoing Phase 1 clinical trial of SENTI-202 (NCT06325748) for the treatment of relapsed/refractory hematologic malignancies including AML at the recently held American Association for Cancer Research (AACR) Annual Meeting 2025. The presented data also included correlative data from patients and preclinical data supporting Logic Gate mechanism of action. As previously announced, SENTI-202 was well-tolerated with no dose limiting toxicities and a maximum tolerated dose was not reached. The preliminary recommended Phase 2 dose (RP2D) was identified based on the totality of clinical data, including efficacy, as 1.5 x 109 CAR NK cells administered on Days 0,7,14 in 28-day Cycles following lymphodepleting chemotherapy. 2 of 3 patients in the preliminary RP2D cohort achieved a composite Complete Remission (cCR); 5 of the 7 best overall response evaluable patients achieved an ORR (cCR + morphologic leukemia-free state) outcome and 4 of the 7 achieved cCR (3 CR with full hematologic recovery, and 1 CRh (CR with partial hematologic recovery)). 4 of 4 cCR patients were MRD- (Measurable Residual Disease Negative) as assessed by local standard of care. All cCR patients continue in remission with follow-ups ranging from 4+ to 8+ months ongoing, and 3 patients received a bone marrow transplant after treatment with SENTI-202. To access a replay of the webcast, click here. Continued Activities Towards Building Market Awareness and Increasing Visibility Among Investors: Joined the Webull Corporate Connect Service (CCS) platform to provide an additional line of communication for shareholders and interested investors and to enhance transparency with its growing shareholder base. Connect with the Company on Webull here. Participated in moderated discussion with Stephen Strickland, MD, MSCI, internationally respected leukemia researcher, Director of Leukemia Research for Sarah Cannon Research Institute and Kanya Rajangam, MD, PhD, President, Head of R&D and Chief Medical Officer of Senti Bio. The KOL Connect segment replay is available here. Participated in a Virtual Investor Closing Bell segment where Dr. Lu, and Dr. Rajangam provided a corporate overview with a question and answer session. The Closing Bell replay is available here. FIRST QUARTER 2025 FINANCIAL RESULTS Cash and Cash Equivalents: As of March 31, 2025, Senti Bio held cash and cash equivalents of approximately $33.8 million. R&D Expenses: Research and development expenses were $9.3 million and $8.8 million for the three months ended March 31, 2025 and 2024, respectively. The increase of $0.5 million was primarily due to an increase of $1.4 million in external services and supplies cost, offset by a decrease of $0.8 million in personnel-related expenses, including stock-based compensation and $0.2 million in facilities and other costs. G&A Expenses: General and administrative expenses were $7.1 million and $7.5 million for the three months ended March 31, 2025 and 2024, respectively. The decrease of $0.4 million was primarily due to a decrease of $0.9 million in personnel-related expenses offset by an increase of $0.5 million in external services and supplies costs. Net Loss: Net loss was $14.1 million, or $1.41 per basic and diluted share, for the three months ended March 31, 2025. About Senti Bio Senti Bio is a biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline is comprised of cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s growth, strategy, progress and timing of its clinical trials for SENTI-202;the timing of availability of data from the ongoing Phase 1 clinical trial of SENTI-202; the ability of any product candidate to perform in humans in a manner consistent with nonclinical, preclinical or previous clinical study data; expectations regarding the anticipated dosing of patients and availability of data from clinical trials, and the timing thereof. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s clinical trial start up, clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical trial startup, clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

Data presented at the American Association for Cancer Research (AACR) Annual Meeting 2025 Dose Finding completed with no dose limiting toxicities and preliminary recommended Phase 2 dose (RP2D) identified 5 of 7 best overall response evaluable patients achieved ORR (3 CR, 1 CRh and 1 morphologic leukemia-free state) across all dose cohorts, including 1 CR and 1 CRh in 3 patients in preliminary RP2D cohort 4 of 4 cCR patients were measurable residual disease (MRD) negative as assessed by local standard of care Early deep responses with SENTI-202 noted across dose levels with all cCRs ongoing as of the data cut and longest durability of 8+ months Company to host webcast to discuss the new Phase 1 SENTI-202 data today, April 28th at 8:30 AM ET; Register Here Announces certain preliminary first quarter 2025 financial results and provides pipeline update SOUTH SAN FRANCISCO, Calif., April 28, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio” or the “Company”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported additional positive preliminary data from a Phase 1 clinical trial of SENTI-202, a potential first-in-class off-the-shelf Logic Gated selective CD33 OR FLT3 NOT EMCN chimeric antigen receptor natural killer (CAR-NK) investigational cell therapy, for the treatment of relapsed/refractory (R/R) hematologic malignancies including acute myeloid leukemia (“AML”). As previously announced, the Company will host a conference call and webcast to discuss the presented data today, April 28, 2025, at 8:30 AM ET (details below). SENTI-202 CLINICAL DATA UPDATE The positive preliminary SENTI-202 clinical data was presented on April 27 in a Clinical Trials Oral Minisymposium at the American Association for Cancer Research (AACR) Annual Meeting 2025 in an abstract titled, “First-in-human, multicenter study of SENTI-202, a CD33/FLT3 selective off-the-shelf logic gated CAR NK cell therapy in hematologic malignancies including AML: Clinical data.” Timothy Lu, MD, PhD, Co-Founder and CEO of Senti Biosciences, commented, “Senti was founded on engineering Logic Gated cell therapies with the enhanced ability to selectively kill cancer cells and protect healthy cells for cancer indications not addressable by existing drugs. Building upon these exciting results, we are continuing to prioritize development of our Logic Gating programs, including SENTI-202 and additional discovery efforts for solid tumors.” SENTI-202 Clinical Results Summary As presented at AACR, 9 patients with relapsed or refractory AML have been treated with various doses of SENTI-202 in the dose finding part of the study and 7 were evaluable for overall response at the data cut-off. The Phase 1 study evaluated two dose levels (1 or 1.5 x 109 CAR NK cells/ dose) and two schedules (3 or 5 doses) of SENTI-202 administered every 28 days on Days 0,7,14 or Days 0,3,7,10,14, respectively, following lymphodepletion with fludarabine/Ara-C. SENTI-202 was well-tolerated with no dose limiting toxicities and a maximum tolerated dose was not reached. The preliminary recommended Phase 2 dose (RP2D) was identified based on the totality of clinical data, including efficacy, as 1.5 x 109 CAR NK cells administered on Days 0,7,14 in 28-day Cycles following lymphodepleting chemotherapy. Efficacy 2 of 3 patients in the preliminary RP2D cohort achieved a composite Complete Remission (cCR); 5 of the 7 best overall response evaluable patients achieved an ORR (cCR + morphologic leukemia-free state) outcome and 4 of the 7 achieved cCR (3 CR with full hematologic recovery, and 1 CRh (CR with partial hematologic recovery)). 4 of 4 cCR patients were MRD- (Measurable Residual Disease Negative) as assessed by local standard of care. All cCR patients continue in remission with the longest follow up being 8+ months, and 3 patients received a bone marrow transplant after treatment with SENTI-202. Pharmacokinetics (PK) SENTI-202 was detected in all treated patients, consistent with other allogeneic CAR NK cell therapy PK profiles, namely with modest expansion in the first 14 days in the periphery followed by clearance from peripheral blood. Bone marrow Cytometry by Time of Flight (CyTOF) analyses SENTI-202 treatment decreased AML blasts and leukemia stem cell (LSC) frequencies and maintained (or increased) healthy hematopoietic stem and progenitor cell (HSPC) frequencies in patients achieving cCR, consistent with the SENTI-202 Logic Gated gene circuit’s designed mechanism of action. Safety SENTI-202 is generally well tolerated with an adverse event profile that is consistent with other investigational NK cell therapies and patients with underlying AML receiving lymphodepleting chemotherapy. In terms of Grade 3 or higher events in >1 patient on trial, four patients each reported grade 3 or higher febrile neutropenia and decreased platelet count, and two patients each reported grade 3 anemia and abdominal pain, but these side effects were either deemed unrelated to SENTI-202 or resulting from the lymphodepleting chemotherapy in all patients except one. No grade 5 adverse events were observed. The Phase 1 study of SENTI-202 is continuing to enroll to confirm the preliminary RP2D followed by disease specific expansion cohorts. The trial is funded in part by a grant from the California Institute for Regenerative Medicine. Kanya Rajangam, MD, PhD, President, Head of R&D and Chief Medical Officer of Senti Bio, summarized, “Based on our clinical, correlative and preclinical data, we believe SENTI-202 has the potential to provide a safe and effective treatment option for AML. We remain focused on the successful execution of the study and look forward to further exploring SENTI-202’s potential.” Stephen A. Strickland, Jr., MD, MSCI, Director, Leukemia Research for Sarah Cannon Research Institute, and the lead author for the AACR abstract, added, “While preliminary, the results demonstrated by SENTI-202 to date continue to be encouraging. There remains a significant unmet medical need in AML for treatments that can overcome tumor heterogeneity and spare healthy cells. Early results are encouraging, not only for the deep durable complete remissions, but also for the excellent safety profile noted thus far. I look forward to seeing additional data and exploring the potential of SENTI-202 to provide a much-needed treatment option to people living with AML.” ADDITIONAL DATA TO BE PRESENTED In addition to the Oral Minisymposium, Senti will be presenting data on SENTI-202 in two additional posters during the AACR meeting. CONFERENCE CALL AND WEBCAST DETAILS Senti Bio management will host a conference call and webcast for investors, analysts and other interested parties to discuss the data presented at AACR today, April 28, 2025, at 8:30 AM ET. Interested participants may access the call by dialing (877) 524-8416 (Domestic) +1 (412) 902-1028 (International). The webcast will be accessible on the Events page under the Investors section of the Company’s website (www.sentibio.com), and will be archived for 90 days. FIRST QUARTER PRELIMINARY FINANCIAL HIGHLIGHTS Senti Bio also announced certain preliminary, unaudited financial results for the first quarter of 2025. These preliminary financial results are subject to change. Final unaudited financial results will be available upon the filing of the Company’s Quarterly Report on Form 10-Q with the Securities and Exchange Commission on or about May 6, 2025. Cash and Cash Equivalents: As of March 31, 2025, Senti Bio held cash and cash equivalents of approximately $33.8 million. R&D Expenses: Research and development expenses were $9.3 million and $8.8 million for the three months ended March 31, 2025 and 2024, respectively. The increase of $0.5 million was primarily due to an increase of $1.4 million in external services and supplies cost, offset by a decrease of $0.8 million in personnel-related expenses, including stock-based compensation and $0.2 million in facilities and other cost. G&A Expenses: General and administrative expenses were $7.1 million and $7.5 million for the three months ended March 31, 2025 and 2024, respectively. The decrease of $0.4 million was primarily due to a decrease of $0.9 million in personnel-related expenses offset by an increase of $0.5 million in external services and supplies cost. Net Loss: Net loss was $14.1 million, or $1.41 per basic and diluted share, for the quarter ended March 31, 2025. ADDITIONAL PIPELINE UPDATE SENTI-301A for HCC: As previously announced, Senti Bio has collaborated with Celest Therapeutics (Shanghai) Co. Ltd. (Celest) to evaluate SN301A in a single center Investigator Sponsored Trial in China. SN301A is a Celest product which incorporates Senti’s SENTI-301A gene circuit into Celest’s CAR-NK cells, which are made using Celest’s manufacturing platform in China, which is distinct from Senti Bio’s manufacturing process. Based on the observation of certain dose limiting toxicities in the SN301A Investigator Sponsored Trial, enrollment has been stopped. Senti is evaluating next steps with SENTI-301A/SN301A as part of ongoing pipeline prioritization. About SENTI-202 SENTI-202 is a First-in-Class Off-the-Shelf Logic Gated Selective CD33 OR FLT3 NOT EMCN CAR NK Cell Therapy product candidate designed to selectively target and eliminate CD33 and/or FLT3-expressing hematologic malignancies, such as AML and myelodysplastic syndrome (“MDS”), while sparing healthy bone marrow cells. SENTI-202 has three main components. First, SENTI-202 contains an OR GATE (providing a “kill” signal), which is an activating CAR that recognizes CD33 and/or FLT3. By targeting either or both of these antigens, SENTI-202 is designed to effectively kill both leukemic blasts and leukemia stem cells, which constitute a difficult-to-eradicate reservoir of AML disease. Second, SENTI-202 contains a NOT GATE (providing a “protect” signal), which is an inhibitory CAR that is designed to recognize healthy cells and protect those healthy cells from being killed, even if they were to express CD33 and/or FLT3, thus potentially widening the therapeutic window. Third, SENTI-202 contains calibrated-release IL-15 (providing an “enhance” signal), which is designed to significantly increase cell persistence, expansion and activity of both the CAR-NK cells and host immune cells. The NK cells used to manufacture SENTI-202 are sourced from selected healthy adult donors. Senti Bio is currently enrolling adult patients with R/R CD33 and/or FLT3-expressing heme malignancies in a Phase 1 clinical trial for SENTI-202, which can be a potential first-in-class allogeneic off-the-shelf treatment for AML/MDS patients. Senti Bio has published SENTI-202 preclinical data demonstrating the potential of Logic Gated CAR-NK cell therapy for the treatment of AML. About AML AML is a cancer of the blood and bone marrow and is the most common type of acute leukemia in adults. It is estimated there were 20,800 new cases of AML in the United States in 2024. The five-year survival rate for these patients is approximately 30%. AML is currently treated with chemotherapy, targeted therapies, and/or allogeneic or autologous stem cell transplant. For patients with R/R AML, there are few treatment options and median overall survival is typically approximately five months. About Senti Bio Senti Bio is a biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging its synthetic biology platform to engineer Gene Circuits into new medicines with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, to spare healthy cells, to increase specificity to target tissues, and/or to be controllable even after administration. The Company’s wholly-owned pipeline is comprised of cell therapies engineered with Gene Circuits to target challenging liquid and solid tumor indications. Senti’s Gene Circuits have been shown preclinically to work in both NK and T cells. Senti Bio has also preclinically demonstrated the potential breadth of Gene Circuits in other modalities and diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release and document contain certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, expectations regarding Senti Bio’s growth, strategy, progress and timing of its clinical trials for SENTI-202; the timing of availability of data from the ongoing Phase 1 clinical trial of SENTI-202; the ability of any product candidate to perform in humans in a manner consistent with nonclinical, preclinical or previous clinical study data; expectations regarding the anticipated dosing of patients and availability of data from clinical trials, and the timing thereof. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s clinical trial start up, clinical studies, patient enrollment, and GMP manufacturing startup activities, (vii) Senti Bio’s dependence on third parties in connection with clinical trial startup, clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of the grant from CIRM, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent periodic report filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. Availability of Other Information About Senti Biosciences, Inc. For more information, please visit the Senti Bio website at www.sentibio.com or follow Senti Bio on X (@SentiBio) and LinkedIn (Senti Biosciences). Investors and others should note that we communicate with our investors and the public using our company website (www.sentibio.com), including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X and LinkedIn. The information that we post on our website or on X or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. Investor Contact: JTC Team, LLC Jenene Thomas (908) 824-0775 [email protected]

– Previously reported MRD negative CR in 2 of 3 relapsed/refractory AML patients enrolled in first dose level and schedule of Phase 1 clinical trial of SENTI-202 maintaining remission – – Strengthened balance sheet with gross proceeds of approximately $47.6 million from private investment in public equity (PIPE) financing – SOUTH SAN FRANCISCO, Calif., March 20, 2025 (GLOBE NEWSWIRE) -- Senti Biosciences, Inc. (Nasdaq: SNTI) (“Senti Bio” or the “Company”), a clinical-stage biotechnology company developing next-generation cell and gene therapies using its proprietary Gene Circuit platform, today reported financial results for the fourth quarter of 2024 and provided a summary of recent pipeline and corporate highlights. “With initial data from the clinical trial of SENTI-202, we are getting a glimpse into the potential profile of our gene circuit-enabled CAR-NK therapy for patients with AML. As we look toward 2025, we anticipate sharing additional data from this exciting trial," said Timothy Lu, MD, PhD, Chief Executive Officer and Co-Founder of Senti Bio. “We are also grateful to have continued support from our investors, including those who participated in our successful PIPE financing in December 2024, and we look forward to demonstrating the potential of our next-generation cell therapies in oncology.” PIPELINE AND CORPORATE HIGHLIGHTS SENTI-202 for AML: The Company previously announced initial data from its ongoing Phase 1 clinical trial of SENTI-202 (NCT06325748) for the treatment of relapsed/refractory hematologic malignancies including acute myeloid leukemia ("AML"). As announced in December 2024, three AML patients had been treated at the lowest dose level (1.0 billion CAR+ NK cells per dose) and lowest dose schedule (3 doses per cycle) and two achieved complete remission ("CR"), confirmed by bone marrow biopsy, which includes blast reduction and recovery of blood cells to normal ranges. In addition, both patients were assessed as measurable residual disease ("MRD") negative after treatment, which is defined as no detectable cancer cells present in a bone marrow sample by the most sensitive locally available method. As of this month, both patients remain in remission. Across all three patients for which data was announced, SENTI-202 was generally well-tolerated, with an adverse event profile consistent with the use of lymphodepleting chemotherapy in patients with AML. Raised gross proceeds of $47.6 million in private investment in public equity (PIPE) financing: In early December 2024, the Company announced a $37.6 million PIPE financing, followed by an additional $10.0 million later that month as part of the same financing. The financing, which was led by Celadon Partners, with participation from New Enterprise Associates (NEA), Leaps by Bayer, Nantahala Capital, The Red Hook Fund LP, and other institutional and accredited investors, is expected to extend the Company’s financial runway into 2026. The Company plans to use the net proceeds of $45.1 million to fund the continued development of the SENTI-202 program and manufacturing ramp-up, other research and development activities, and for general corporate purposes. Received CIRM Grant funds for clinical development of SENTI-202: In January 2025, the Company also received an additional $1.5 million from its $8 million grant from the California Institute for Regenerative Medicines (“CIRM”) that was first announced in July 2024, bringing the total CIRM amount received by the Company to $6.4 million. Expanded senior leadership team: In February 2025, the Company announced the addition of strategic hires Jay Cross as Chief Financial Officer and Faraz Siddiqui as Senior Vice President of Technical Operations. Appointed Fran Schulz and Feng Hsiung to the Board of Directors ("Board"): In December 2024, Fran Schulz was appointed to the Board. She has finance, strategic planning, operations, and transactions expertise in the life sciences industry. She serves as chairperson of the Board’s Audit Committee. In March 2025, Feng Hsiung was appointed to the Board and as a member of the Audit Committee. He has extensive business, finance, and investment experience from a career that included investment and portfolio management as well as investment banking. FOURTH QUARTER AND FULL YEAR 2024 FINANCIAL RESULTS Cash and Cash Equivalents: As of December 31, 2024, Senti Bio held cash and cash equivalents of $48.3 million. R&D Expenses: Research and development expenses were $7.8 million for the quarter ended December 31, 2024, compared to $9.1 million for the same period in 2023. The decrease was primarily related to a reduction in headcount as the Company streamlined operations to prioritize SENTI-202 in 2024. For the full year of 2024, research and development expenses were $34.4 million. G&A Expenses: General and administrative expenses were $8.4 million for the quarter ended December 31, 2024, compared to $9.3 million for the same period in 2023. The decrease was mainly attributed to a reduction in headcount. For the full year of 2024, general and administrative expenses were $26.3 million. Net Loss: Net loss was $0.6 million, or $0.67 per basic and diluted share, for the quarter ended December 31, 2024. Net loss for the full-year 2024 was $52.8 million, or $12.03 per share, including non-cash stock-based compensation expense of $1.8 million. About Senti Bio Senti Bio is a clinical-stage biotechnology company developing a new generation of cell and gene therapies for patients living with incurable diseases. To achieve this, Senti Bio is leveraging a synthetic biology platform called Gene Circuits to create therapies with enhanced precision and control. These Gene Circuits are designed to precisely kill cancer cells, spare healthy cells, increase specificity to target cells and control the expression of drugs even after administration. Senti Bio’s wholly-owned pipeline includes off-the-shelf CAR-NK cells, outfitted with Gene Circuits, to target challenging liquid and solid tumor indications. Senti Bio’s lead program SENTI-202, a Logic Gated CD33 and/or FLT3-targeting hematologic cancer therapeutic candidate, demonstrated MRD-negative complete remissions in 2 of 3 patients in initial clinical data as of September 19, 2024, with 4+ and 3+ month durability as of December 2, 2024. Senti Bio has also preclinically demonstrated that its Gene Circuits can function in T cells, for example against solid tumor targets. Additionally, Senti Bio has preclinically demonstrated the potential breadth of Gene Circuits in other cell and gene therapy modalities, diseases outside of oncology, and continues to advance these capabilities through partnerships. Forward-Looking Statements This press release contains certain statements that are not historical facts and are considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements generally are identified by the words “believe,” “could,” “predict,” “continue,” “ongoing,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” “forecast,” “seek,” “target” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are predictions, projections, and other statements about future events that are based on current expectations of Senti Bio’s management and assumptions, whether or not identified in this document, and, as a result, are subject to risks and uncertainties. Forward-looking statements include, but are not limited to, statements regarding future events, including the future development of our clinical and pre-clinical pipeline, success of our SENTI-202 clinical trial and financial projections and future financial and operating results. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as and must not be relied on by any investor as, a guarantee, an assurance, a prediction, or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond the control of Senti Bio. Many factors could cause actual future results to differ materially from the forward-looking statements in this document, including but not limited to: (i) changes in domestic and foreign business, market, financial, political and legal conditions, (ii) changes in the competitive and highly regulated industries in which Senti Bio operates, variations in operating performance across competitors, changes in laws and regulations affecting Senti Bio’s business, (iii) the ability to implement business plans, forecasts and other expectations, (iv) the risk of downturns and a changing regulatory landscape in Senti Bio’s highly competitive industry, (v) risks relating to the uncertainty of any projected financial information with respect to Senti Bio, (vi) risks related to uncertainty in the timing or results of Senti Bio’s clinical trial initiation and the progress of clinical trials, patient enrollment, and GMP manufacturing activities, (vii) Senti Bio’s dependence on fourth parties in connection with clinical trial startup, clinical studies, and GMP manufacturing activities, (viii) risks related to delays and other impacts from macroeconomic and geopolitical events, increasing rates of inflation and rising interest rates on business operations, (ix) risks related to the timing and utilization of Senti Bio’s grant from CIRM and net proceeds of the PIPE financing, and (x) the success of any future research and development efforts by Senti Bio. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Senti Bio’s most recent Quarterly Report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (“SEC”), and other documents filed by Senti Bio from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements in this document. There may be additional risks that Senti Bio does not presently know, or that Senti Bio currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements in this document. Forward-looking statements speak only as of the date they are made. Senti Bio anticipates that subsequent events and developments may cause Senti Bio’s assessments to change. Except as required by law, Senti Bio assumes no obligation to update publicly any forward-looking statements, whether as a result of new information, future events, or otherwise. CONTACT: Senti Bio Contacts Investors: [email protected] Media: [email protected]