APVO

89% of evaluable mipletamig patients achieve remission in combination therapy for frontline AML across two trials Introduces first trispecific molecules, APVO451 and APVO452, advancing therapies designed to overcome immune suppression in certain solid tumors Both molecules leverage Aptevo's unique use of the CRIS-7-derived CD3 binding domain, associated with favorable safety outcomes in the clinic; CD3 T-cell engager portfolio expanded to five Company raises $18.7 million in the third quarter, $4.1 million since quarter end, extends cash runway into 4Q26 SEATTLE, WA / ACCESS Newswire / November 6, 2025 / Aptevo Therapeutics Inc. (Nasdaq:APVO), a clinical-stage biotechnology Company focused on developing novel immune-oncology therapeutics based on its proprietary ADAPTIR® and ADAPTIR-FLEX® platform technologies, today reported financial results for the quarter ended September 30, 2025, and provided a business update. Third Quarter Highlights 89% remission* reported among evaluable frontline AML patients across two trials treated with mipletamig in combination therapy, including 100% remission in Cohort 3 in the ongoing RAINIER trial (*Remission = complete remission (CR) and, complete remission with blood markers that have not yet recovered (CRi). No cytokine release syndrome (CRS) observed among evaluable frontline patients to date - a meaningful distinction in a category where CRS is a common and often dose-limiting toxicity Introduced the Company's first trispecific T-cell engagers - APVO451 and APVO452 - expanding the oncology portfolio to five CRIS-7-derived CD3-targeting molecules These candidates are designed to target tumors that suppress immune activity, a key barrier to durable responses in solid tumors Both trispecifics leverage Aptevo's unique use of the CRIS-7-derived CD3 binding domain, a clinically validated T-cell activation approach that has demonstrated favorable safety and tolerability in clinical trials with mipletamig Continued expansion of the portfolio reflects Aptevo's intentional platform strategy: purpose-built immune-modulating therapies that aim to be both powerful and clinically manageable for patients Raised $18.7 million, net in the third quarter and $4.1 million, net since quarter end, extending cash runway well into 4Q26 and enabling the Company to reach important clinical milestones next year "We continue to make disciplined p...

SEATTLE, WASHINGTON / ACCESS Newswire / October 8, 2025 / Aptevo Therapeutics ("Aptevo" or the "Company") (Nasdaq:APVO), a clinical-stage biotechnology company developing novel bispecific and trispecific immuno-oncology therapeutics, today announced its participation in upcoming key financial, industry, scientific and medical conferences this fall, providing the opportunity to highlight continued momentum and recent developments among a broad range of stakeholder audiences. These conferences include: 4th Annual ROTH Healthcare Opportunities Conference October 9, 2025 - Metropolitan Club, New York City, New York Aptevo will participate in a panel on Acute Myeloid Leukemia titled "Novel AML Therapies Showing Clear Clinical Progress," discussing progress and recent trial outcomes of its lead asset, mipletamig, and sharing emerging evidence of its differentiated clinical profile in frontline AML-where strong safety, tolerability, and early efficacy continue to demonstrate meaningful potential for improved patient outcomes Biotechnology Innovation Organization (BIO)-Europe 2025 - 31st Annual International Partnering Conference November 3-5, 2025 (in-person); Digital Partnering Days: November 11-12, 2025 - Messe Wien Exhibition & Congress Center, Vienna, Austria The Business Development Team will be on-site and actively participating in meetings at the largest biotechnology meeting in Europe Society of Immunotherapy in Cancer (SITC) 2025 - 40th Anniversary Annual Meeting November 5-9, 2025 - Gaylord National Resort & Convention Center, National Harbor, Maryland Aptevo's R&D Team will present a poster highlighting a novel trispecific targeting Nectin-4, CD3 and CD40 to overcome the immunosuppressive the tumor microenvironment American Society of Hematology (ASH) 2025 - 67th American Society of Hematology Annual Meeting & Exposition December 6-9, 2025 - Orange County Convention Center, Orlando, Florida Interim results from the ongoing Phase 1b/2 RAINIER trial evaluating mipletamig in frontline combination therapy for the treatment of AML, will be presented in a poster session by the clinical team. To meet with onsite Company representatives at any of these meetings, we cordially invite you to contact: Miriam Weber Miller Aptevo Therapeutics [email protected] or [email protected] +1 (206) 859 6629 About Aptevo Therapeutics Aptevo Therapeutics Inc. (Nasdaq: APVO) is a clinic...

Mipletamig's 85% frontline AML remission rate and favorable safety profile drive APVO's differentiated CD3 portfolio expansion with APVO455, a Nectin-4 x CD3 bispecific for multiple solid tumor types CD3 bispecific portfolio now includes three candidates - mipletamig (AML), APVO442 (prostate cancer), and newly added APVO455 - advancing a targeted, tumor-specific strategy uniquely engineered for safety, tumor specificity and clinical impact Mipletamig, continues to outperform benchmarks, trial enrollment continues $15.9 million raised in 2Q25, extending cash runway into late 4Q25 SEATTLE, WASHINGTON / ACCESS Newswire / August 11, 2025 / Aptevo Therapeutics Inc. (Nasdaq:APVO), a clinical-stage biotechnology Company focused on developing novel immune-oncology therapeutics based on its proprietary ADAPTIR® and ADAPTIR-FLEX® platform technologies, today reported financial results for the quarter ended June 30, 2025, and provided a business update. Second Quarter Highlights Pipeline Expansion - Introduced APVO455, a Nectin-4 x CD3 bispecific for solid tumors, expanding the Company's suite of differentiated CRIS-7-derived CD3 - engaging molecules in development, including lead candidate, mipletamig Mipletamig for acute myeloid leukemia (AML) - Achieved 85% remission* rate (11/13 patients) in frontline AML patients across two trials in combination therapy Increased Liquidity - Completed financings that raised a total of $15.9 million, extending cash runway into late 4Q25 Secured an equity line of credit for up to an additional $25 million in capital *Remission = complete remission (CR) and, complete remission with blood markers that have not yet recovered (CRi). "The second quarter marked a period of decisive progress for Aptevo across both clinical and corporate fronts," said Marvin White, President and CEO of Aptevo. We are energized by the expansion of our differentiated CD3 bispecific portfolio - anchored by mipletamig in AML and APVO442 in prostate cancer - with the introduction of APVO455, a Nectin-4 x CD3 bispecific designed to address a broad range of solid tumor types. Broadening our reach into solid tumors, beyond prostate cancer, with APVO455 underscores Aptevo's commitment to advancing differentiated, next-generation immunotherapies in areas of significant unmet need." Mr. White continued, "We're pleased to report that our lead asset, mipletamig, continu...

9 of 10 frontline AML patients achieve remission with mipletamig + standard of care across two trials Mipletamig triplet combination continues to outperform standard doublet benchmark No cytokine release syndrome observed in the ongoing RAINIER trial: favorable safety profile supports role in frontline AML Cohort 2 enrollment is complete, and Cohort 3 is now enrolling SEATTLE, WA / ACCESS Newswire / May 15, 2025 / Aptevo Therapeutics Inc. (Nasdaq:APVO), a clinical-stage biotechnology Company focused on developing novel immune-oncology therapeutics based on its proprietary ADAPTIR® and ADAPTIR-FLEX® platform technologies, today reported financial results for the quarter ended March 31, 2025, and provided an update on the ongoing mipletamig clinical trial. Business Update"The latest outcomes from the RAINIER trial-remissions that were achieved rapidly and with no reported cytokine release syndrome-underscore the strength of our approach and the potential of mipletamig to redefine frontline AML treatment. With each milestone, we are not only validating the safety and efficacy of our drug, but moving closer to changing the standard of care for patients who have long had limited options. We remain focused on advancing the trial and look forward to sharing further clinical updates in the months ahead. This is more than progress-it's momentum toward a new era in frontline AML care," said Marvin White, President and CEO of Aptevo. Mipletamig Data HighlightsEnrollment continues in the RAINIER dose optimization trial. This is a Phase 1b/2 study evaluating mipletamig in combination with venetoclax and azacitidine, the standard of care for frontline acute myeloid leukemia (AML) patients who are unfit to receive intensive high dose chemotherapy. Cohort 2 enrollment is now complete, and Cohort 3 is now open and enrolling. Mipletamig has been evaluated in almost 100 patients across three clinical studies, thus far, in both combination and monotherapy settings. Outcomes have consistently demonstrated a growing body of evidence that supports its potential role in the treatment of frontline AML. Data Highlights include: Efficacy Results Reported on March 20, 2025 Data from Six frontline AML patients has been reported in the ongoing RAINIER Phase 1b/2 trial evaluating mipletamig in combination with venetoclax and azacitidine. Of these, five of six (5/6) patients have achieved...