HOWL

Jazz Pharmaceuticals JAZZ reported second-quarter 2026 adjusted earnings per share (EPS) of $5.71, which missed the Zacks Consensus Estimate of $6.04. This shortfall primarily reflected $77 million in acquired in-process research and development (IPR&D) expenses, which reduced adjusted EPS by 94 cents. In the year-ago quarter, the company posted an adjusted loss of $8.25 per share, largely due to a one-time charge of $905.4 million related to the acquisition of clinical-stage biotech Chimerix. Total revenues rose 16% year over year to $1.21 billion, which beat the Zacks Consensus Estimate of $1.11 billion. This uptick was driven by the better-than-expected sales performance of its oncology and neuroscience products. Shares of Jazz rose in after-hours trading yesterday. The gain was attributed to the stronger-than-expected revenues and raised 2026 sales outlook that outweighed the earnings miss. Year to date, the stock has gained 48% compared with the industry’s 2% growth. Image Source: Zacks Investment Research Net product sales totaled $1.16 billion, up 17% year over year. The reported figure beat both the Zacks Consensus Estimate of $1.08 billion and our model estimate of $1.05 billion. High-sodium oxybate authorized generic (AG) royalty revenues fell 22% year over year to $42 million. Other royalty and contract revenues increased 67% to $10 million, though they remained a relatively small contributor to total revenues. Net product sales for the combined oxybate business, comprising Xyrem and Xywav, rose 11% to nearly $502 million. This figure beat both the Zacks Consensus Estimate of about $455 million and our model estimate of $441 million. Xywav sales increased 13% year over year to $471 million, supported by continued demand in narcolepsy and idiopathic hypersomnia (IH). Jazz added approximately 525 net Xywav patients during the second quarter, marking its highest quarterly increase in a year. The company exited June with around 17,125 active patients, including 11,275 narcolepsy patients and 5,850 IH patients. Management said the uptake of competing high-sodium generics remained limited, supporting its expectation for double-digit Xywav growth in 2026. Xyrem sales continued their downward trajectory, declining 14% year over year to $30.5 million due to patients switching to Xywav and generic erosion. Epidiolex/Epidyolex sales increased 16% year over year to $292 million. Management attributed the performance primarily to strong underlying demand across pediatric and adult treatment settings. Alongside the earnings release, Jazz announced that it had submitted a regulatory filing to the FDA for a capsule formulation of Epidiolex. This version is intended to broaden utilization within the currently approved indications, particularly among adolescent and adult patients for whom the liquid formulation may be less convenient. The company is also expanding the Epidiolex clinical program through studies in developmental and epileptic encephalopathies, juvenile myoclonic epilepsy and adult Lennox-Gastaut syndrome. Oncology sales increased 32% year over year to $362 million. Zepzelca revenues surged 42% to nearly $106 million, driven by adoption in first-line maintenance treatment for extensive-stage small-cell lung cancer (SCLC). This figure beat the Zacks Consensus Estimate of more than $93 million and our model estimate of $81 million. During the conference call, Jazz announced plans to submit a labeling supplement to remove Zepzelca’s second-line metastatic SCLC indication. The proposed removal will not affect its first-line maintenance indication. Rylaze/Enrylaze posted sales of $99.5 million, down 1% year over year. Modeyso generated $48 million in sales compared with $41 million in the previous quarter. More than 600 patients had received the brain tumor treatment through the end of the second quarter since its launch last year. Vyxeos sales declined 30% to more than $31 million, while Defitelio revenues rose 29% to $62 million. Ziihera contributed $15.4 million in the reported quarter versus $13.3 million in the previous quarter. Jazz is preparing for a potential launch in first-line HER2-positive gastroesophageal adenocarcinoma (GEA) following the drug's Aug. 25 regulatory action date. Adjusted gross margin contracted 60 basis points year over year to 92.1%. The decline reflected higher sales of Modeyso and Zepzelca, which carry third-party royalty obligations. Adjusted selling, general and administrative expenses rose 11% to more than $343 million, reflecting higher marketing investments and compensation-related expenses. Adjusted research and development costs also increased 11% to about $185 million, primarily due to higher clinical study expenses related to Ziihera. The quarter included $77 million in acquired IPR&D expenses related to agreements with AbCellera Biologics ABCL and Werewolf Therapeutics HOWL. Jazz raised its 2026 revenue guidance to $4.60-$4.75 billion from $4.25-$4.50 billion. The revision reflects stronger Xywav performance and expected double-digit growth from the epilepsy and oncology franchises. The company now expects rare sleep revenues of $2.03-$2.13 billion. Adjusted SG&A expense guidance was increased to $1.33-$1.37 billion from $1.26-$1.32 billion, while adjusted R&D expense guidance was maintained at $725-$775 million. The adjusted effective tax rate is expected to remain between 11.5% and 13.5%. Jazz Pharmaceuticals PLC price | Jazz Pharmaceuticals PLC Quote Jazz currently carries a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here. Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Jazz Pharmaceuticals PLC (JAZZ) : Free Stock Analysis Report AbCellera Biologics Inc. (ABCL) : Free Stock Analysis Report Werewolf Therapeutics, Inc. (HOWL) : Free Stock Analysis Report This article originally published on Zacks Investment Research (zacks.com). Zacks Investment Research

WATERTOWN, Mass., July 31, 2026 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the second quarter ended June 30, 2026. “In the second quarter of 2026, as previously announced, Werewolf entered into an asset purchase agreement with Jazz Pharmaceuticals Ireland Limited (“Jazz”) with respect to the JZP898 program previously licensed to Jazz, and repaid all amounts owed under its loan and security agreement with K2 HealthVentures LLC (“K2”). Together, these transactions, which included a $21.0 million payment to Werewolf, enabled the Company to explore multiple options for the continued development of its INDUKINE and INDUCER platforms and programs,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “In the second half of the year, we expect to provide additional updates on the strategic alternatives process that is being run with assistance from our exclusive financial advisor, Piper Sandler & Co. (“Piper Sandler”), as well as data updates on our clinical trials of WTX-124 and WTX-330.” Financial Results for the Second Quarter of 2026: Cash position: As of June 30, 2026, cash and cash equivalents were $22.0 million, compared to $46.5 million as of March 31, 2026. Based on its current operating plan, the Company expects to be able to fund its operations into the second quarter of 2027. Collaboration revenue: Collaboration revenue was $21.0 million for the second quarter of 2026, and consists of revenue recognized related the Company’s agreement to sell its JZP898 program to Jazz Pharmaceuticals Ireland Limited. No collaboration revenue was recognized during the second quarter of 2025. Research and development expenses: Research and development expenses were $6.2 million for the second quarter of 2026, compared to $13.1 million for the same period in 2025. General and administrative expenses: General and administrative expenses were $7.7 million for the second quarter of 2026, compared to $4.4 million for the same period in 2025. Net income (loss): Net income was $3.7 million for the second quarter of 2026, compared to a net loss of $18.0 million for the same period in 2025. About Werewolf Therapeutics:Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company has leveraged its proprietary PREDATOR® platform to design conditionally activated INDUKINETM and INDUCERTM molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf has leveraged positive data from its INDUKINE molecules to advance the development of INDUCER molecules. Werewolf’s first INDUCER development candidates, WTX-1011 and WTX-2022, target STEAP1 for prostate cancer and CDH6 for ovarian and kidney cancer, respectively. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking StatementsThis press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management, including potential strategic partnerships; Werewolf’s exploration and evaluation of strategic alternatives and the ability of any such strategic alternative to provide stockholder value; the projection of the cash runway; the expected timeline for clinical development of product candidates and the availability of data from such clinical development; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “approach,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to identify strategic alternatives to advance its promising platform and drug development pipeline to maximize stockholder value; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; the Company’s ability to continue as a going concern; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-Q filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. The Company does not have a defined timeline for the exploration and evaluation of strategic alternatives and cannot confirm that the process will result in any strategic alternative being announced or consummated. The Company cannot provide any commitment regarding when or if this strategic evaluation process will result in any type of transaction, and there can be no assurance that such activities will result in any agreements or transactions that will enhance stockholder value. The Company does not intend to discuss or disclose further developments during this process unless and until its board of directors has approved a specific action or the Company has otherwise determined that further disclosure is appropriate. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINETM, INDUCERTM, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Company Contact:Jonathan OwenSVP, General Counsel and SecretaryWerewolf [email protected] Piper Sandler Contacts:Peter DayManaging Director,Piper Sandler & [email protected] Michael Burton-WilliamsExecutive Director,Piper Sandler & [email protected]

– Company continues to evaluate strategic options to maximize shareholder value – WATERTOWN, Mass., May 07, 2026 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the first quarter ended March 31, 2026. “Werewolf, assisted by its exclusive financial advisor, Piper Sandler & Co. (“Piper Sandler”), continues to explore a range of alternatives available to the Company to maximize shareholder value,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “As will be disclosed in more detail in our Quarterly Report on Form 10-Q that will be filed today, we have entered into an asset purchase agreement with Jazz Pharmaceuticals Ireland Limited (“Jazz”) by which Jazz has acquired exclusive global development and commercialization rights to JZP898, an IFNα program, which was previously exclusively licensed by Jazz pursuant to a collaboration and license agreement entered into in 2022. Additionally, we have repaid all amounts owed under the loan and security agreement dated May 2, 2024, with K2 HealthVentures LLC (“K2”) as of May 6, 2026. We continue to explore options for our INDUKINE and INDUCER platforms and programs.” Financial Results for the First Quarter of 2026: Cash position: As of March 31, 2026, cash and cash equivalents were $46.5 million, compared to $57.1 million as of December 31, 2025. Subsequent to the end of the first quarter of 2026, the Company entered into the asset purchase agreement with Jazz and repaid all obligations under the loan and security agreement with K2, in each case as described above. The Company plans to update cash runway guidance in the near future. Research and development expenses: Research and development expenses were $8.2 million for the first quarter of 2026, compared to $13.1 million for the same period in 2025. General and administrative expenses: General and administrative expenses were $5.1 million for the first quarter of 2026, compared to $4.9 million for the same period in 2025. Net loss: Net loss was $13.5 million for the first quarter of 2026, compared to $18.1 million for the same period in 2025. About Werewolf Therapeutics: Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company has leveraged its proprietary PREDATOR® platform to design conditionally activated INDUKINE™ and INDUCER™ molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf has leveraged positive data from its INDUKINE molecules to advance the development of INDUCER molecules. Werewolf’s first INDUCER development candidates, WTX-1011 and WTX-2022, target STEAP1 for prostate cancer and CDH6 for ovarian and kidney cancer, respectively. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management, including potential strategic partnerships; Werewolf’s exploration and evaluation of strategic alternatives and the ability of any such strategic alternative to provide stockholder value; the projection of the cash runway; the expected timeline for the preclinical and clinical development of product candidates and the availability of data from such preclinical and clinical development; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “approach,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to identify strategic alternatives to advance its promising platform and drug development pipeline to maximize stockholder value; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; the Company’s ability to continue as a going concern; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-K filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. The Company does not have a defined timeline for the exploration and evaluation of strategic alternatives and cannot confirm that the process will result in any strategic alternative being announced or consummated. The Company cannot provide any commitment regarding when or if this strategic evaluation process will result in any type of transaction, and there can be no assurance that such activities will result in any agreements or transactions that will enhance stockholder value. The Company does not intend to discuss or disclose further developments during this process unless and until its board of directors has approved a specific action or the Company has otherwise determined that further disclosure is appropriate. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINE™, INDUCER™, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Company Contact: Jonathan Owen SVP, General Counsel and Secretary Werewolf Therapeutics [email protected] Piper Sandler Contacts: Peter Day Managing Director, Piper Sandler & Co. [email protected] Michael Burton-Williams Executive Director, Piper Sandler & Co. [email protected]

Company continues to evaluate strategic options to maximize shareholder value WATERTOWN, Mass., March 27, 2026 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the fourth quarter and year ended December 31, 2025. “We have initiated a process to explore a range of alternatives available to the Company to maximize stockholder value,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “Such measures may include, among other options, a sale of the Company, a business combination or merger, a sale of assets, licensing or collaboration arrangements, or other strategic transactions. In addition to our clinical-stage candidates and our named earlier-stage candidates, our INDUKINE and INDUCER platforms provide exciting opportunities to apply our differentiated masking and protease linker technology in multiple additional modalities.” The Company has engaged Piper Sandler & Co. (“Piper Sandler”) to serve as exclusive financial advisor to assist in the strategic evaluation process. The Company does not have a defined timeline for the exploration and evaluation of strategic alternatives and cannot confirm that the process will result in any strategic alternative being announced or consummated. The Company cannot provide any commitment regarding when or if this strategic evaluation process will result in any type of transaction, and there can be no assurance that such activities will result in any agreements or transactions that will enhance stockholder value. The Company does not intend to discuss or disclose further developments during this process unless and until its board of directors has approved a specific action or the Company has otherwise determined that further disclosure is appropriate. Financial Results for the Fourth Quarter and Full Year 2025: Cash position: As of December 31, 2025, cash and cash equivalents were $57.1 million, compared to $65.7 million as of September 30, 2025. The Company believes its cash and cash equivalents as of December 31, 2025, will be sufficient to fund operational expenses and capital requirements into the fourth quarter of 2026. Research and development expenses: Research and development expenses were $6.9 million for the fourth quarter of 2025, compared to $15.7 million for the same period in 2024. Research and development expenses were $44.8 million for the full year 2025, compared to $56.4 million for the full year 2024. General and administrative expenses: General and administrative expenses were $2.5 million for the fourth quarter of 2025, compared to $4.6 million for the same period in 2024. General and administrative expenses were $15.8 million for the full year 2025, compared to $19.0 million for the full year 2024. Net loss: Net loss was $8.4 million for the fourth quarter of 2025, compared to $20.4 million for the same period in 2024. Net loss was $60.8 million for the full year 2025, compared to $70.5 million for the full year 2024. About Werewolf Therapeutics: Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company is leveraging its proprietary PREDATOR® platform to design conditionally activated INDUKINE™ and INDUCER™ molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf’s first INDUCER development candidate, WTX-1011, targets STEAP1 for prostate cancer, and its second INDUCER candidate, WTX-2022, targets CDH6 for ovarian and kidney cancer. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management, including potential strategic partnerships; Werewolf’s exploration and evaluation of strategic alternatives and the ability of any such strategic alternative to provide stockholder value; the projection of the cash runway; the expected timeline for the preclinical and clinical development of product candidates and the availability of data from such preclinical and clinical development; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “approach,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; the Company’s ability to continue as a going concern; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-Q filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINE™, INDUCER™, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Company Contact: Steven Bloom Chief Business Officer Werewolf Therapeutics [email protected] Piper Sandler Contacts: Peter Day Managing Director, Piper Sandler & Co. [email protected] Michael Burton-Williams Executive Director, Piper Sandler & Co. [email protected]

– Update on WTX-124 Phase 1/1b clinical trial interim data and End of Phase 1 meeting with the U.S. Food & Drug Administration (FDA) is expected to be provided later in the fourth quarter of 2025 – – Update on Phase 1b/2 clinical trial of WTX-330 and potential further development plan is expected to be provided later in the fourth quarter of 2025 – – WTX-1011, Company’s first INDUCER™ T-cell engager development candidate targeting STEAP1, continues IND-enabling studies – WATERTOWN, Mass., Nov. 04, 2025 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the third quarter ended September 30, 2025. “Werewolf is delivering on the promise of its proprietary PREDATOR® platform of conditionally activated immune therapeutics, marked by significant progress for our lead INDUKINE™ clinical programs, WTX-124 and WTX-330, and our first INDUCER T-cell engager candidate, WTX-1011,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “For WTX-124, which received Fast Track Designation last month, we plan to provide an update later in the fourth quarter of 2025 on the path to a registration-enabling trial based on interim Phase 1/1b clinical trial data and feedback from an End of Phase 1 meeting with the FDA. At the same time, we plan to provide an update on the current Phase 1b/2 clinical trial of WTX-330 and a potential development plan for this program. Finally, we continue to make progress in IND-enabling studies for WTX-1011, our first INDUCER T cell Engager development candidate, and plan to nominate a differentiated target candidate by year-end.” Recent Highlights and Upcoming Milestones Clinical-Stage INDUKINE Molecules: WTX-124: a systemically delivered, conditionally activated Interleukin-2 (IL-2) INDUKINE molecule being developed as monotherapy and in combination with pembrolizumab in multiple solid tumor types. Fast Track Designation received from the US FDA for the use of WTX-124 for the potential treatment of patients with locally advanced or metastatic cutaneous melanoma after standard of care immunotherapy. Fast Track Designation is intended to expedite the development of drugs to address a serious unmet medical need and provide opportunities for frequent FDA interactions. All expansion arms are either actively enrolling patients or fully enrolled in the ongoing Phase 1/1b clinical trial at a recommended dose of 18 mg administered intravenously every two weeks (IV Q2W). Enrollment is expected to be completed in all arms by the first quarter of 2026. In the fourth quarter of 2025, Werewolf plans to release interim data from the monotherapy and combination expansion arms and to provide feedback from the Company’s End of Phase 1 meeting with the FDA. These inputs are expected to provide insight into potential registrational pathways for WTX-124 in advanced or metastatic cutaneous melanoma. At the 2025 Society for Immunotherapy of Cancer’s (SITC) 40th Annual Meeting, the Company will present a poster entitled: “Pharmacokinetic insight into the IL-2 INDUKINE prodrug WTX-124: real-time assessment of tumor-specific activation and immune modulation.” WTX-330: a systemically delivered, conditionally activated Interleukin-12 (IL-12) INDUKINE molecule being developed in advanced or metastatic solid tumors. Actively enrolling in a Phase 1b/2 clinical trial (WTX-330x2102) in locally advanced or metastatic solid tumors. An update on the clinical trial is expected to be released in the fourth quarter of 2025, with guidance on potential further development plans. At the 2025 Society for Immunotherapy of Cancer’s (SITC) 40th Annual Meeting, the Company will present a poster entitled: “Sequential administration of WTX-124 and mWTX-330, IL-2 and IL-12 INDUKINE molecules, enhanced anti-tumor activity in mice bearing poorly immunogenic EMT6 tumors without systemic toxicity.” Preclinical-Stage INDUCER Molecules: WTX-1011: a potential first-in-class conditionally activated anti-STEAP1 T-cell engager to provide an improved therapeutic index. STEAP1 is a promising prostate cancer target with limited expression in normal tissues, but notable toxicities are associated with existing anti-STEAP1 T-cell engager therapy. Preclinical data demonstrated that PREDATOR® masking technology successfully silenced peripheral activity and prevented cytokine release. Utilizing a novel and highly effective anti-CD3 masking strategy, Werewolf expects to nominate a differentiated target candidate in the fourth quarter of 2025. At the 2025 Society for Immunotherapy of Cancer’s (SITC) 40th Annual Meeting, the Company will present a poster entitled: “Development of conditional T cell engagers (INDUCER™ molecules) with a highly effective masking approach to reduce dose-limiting cytokine release and off-target peripheral toxicity.” Preclinical-Stage INDUKINE Partnering Opportunities: Werewolf’s previously announced development candidates available for partnering include: WTX-712, its Interleukin-21 (IL-21) INDUKINE molecule, and WTX-518, its binding protein resistant Interleukin-18 (IL-18) INDUKINE molecule, each for the treatment of cancer, and WTX-921, a first-of-its-kind Interleukin-10 (IL-10) INDUKINE molecule for the treatment of inflammatory bowel disease (IBD) and potentially other inflammatory diseases. Financial Results for the Third Quarter of 2025: Cash position: As of September 30, 2025, cash and cash equivalents were $65.7 million, compared to $77.6 million as of June 30, 2025. The Company believes its cash and cash equivalents as of September 30, 2025, will be sufficient to fund operational expenses and capital expenditure requirements into the fourth quarter of 2026. Research and development expenses: Research and development expenses were $11.6 million for the third quarter of 2025, compared to $12.5 million for the same period in 2024. General and administrative expenses: General and administrative expenses were $4.1 million for the third quarter of 2025, compared to $4.6 million for the same period in 2024. Net loss: Net loss was $16.4 million for the third quarter of 2025, compared to $16.7 million for the same period in 2024. About Werewolf Therapeutics: Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company is leveraging its proprietary PREDATOR® platform to design conditionally activated INDUKINE™ and INDUCER™ molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf is advancing WTX-124 in multiple tumor types as a single agent and in combination with an immune checkpoint inhibitor and WTX-330 in multiple solid tumor types as a single agent. Werewolf is leveraging positive data from its INDUKINE molecules to advance the development of INDUCER molecules. Werewolf’s first INDUCER development candidate, WTX-1011, targets STEAP1 for prostate cancer. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management; the projection of the cash runway; the expected timeline for the preclinical and clinical development of product candidates and the availability of data from such preclinical and clinical development; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; the Company’s ability to continue as a going concern; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-Q filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINE™, INDUCER™, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Investor Contact: Dan Ferry LifeSci Advisors 617.430.7576 [email protected] Media Contact: Amanda Sellers Deerfield Group 301.332.5574 [email protected] Company Contact: Tim Trost Chief Financial Officer Werewolf Therapeutics [email protected]

– WTX-124 Phase 1/1b clinical trial on track for interim data readout in the fourth quarter of 2025, including patients in both the monotherapy and combination expansion arms of cutaneous melanoma and renal cell carcinoma – – Planning to engage with U.S. Food & Drug Administration (FDA) in the second half of 2025 to discuss potential registrational pathways for WTX-124 in advanced or metastatic cutaneous melanoma – – Phase 1b/2 clinical trial of WTX-330 is actively enrolling, with anticipated determination of dosing regimen by the end of 2025 – – Company announces WTX-1011, its first INDUCER™ T-cell engager development candidate, targeting STEAP1 – WATERTOWN, Mass., Aug. 14, 2025 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the second quarter ended June 30, 2025. “We continue to advance the differentiated technology born out of our PREDATOR® platform and capitalize on the strong foundation of clinical data from our lead INDUKINE™ asset, WTX-124,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “For WTX-124, we remain on track for an interim data readout of our Phase 1/1b clinical trial in the fourth quarter of 2025. The readout is expected to include patients with cutaneous melanoma and renal cell carcinoma, where there exist significant unmet therapeutic needs and which represent large commercial opportunities in oncology. We also anticipate meeting with the FDA later this year to discuss potential registrational pathways. Further, we are excited to introduce WTX-1011, our first INDUCER T-cell engager candidate, targeting STEAP1 for prostate cancer. Utilizing novel anti-CD3 PREDATOR masking technology, our WTX-1011 preclinical data have shown anti-tumor activity while reducing peripheral activity to prevent cytokine release syndrome. Given the broad potential of our approach with INDUCER molecules, we plan to nominate an additional candidate before year-end.” Recent Highlights and Upcoming Milestones Clinical-Stage INDUKINE Molecules: WTX-124: a systemically delivered, conditionally activated Interleukin-2 (IL-2) INDUKINE molecule being developed as monotherapy and in combination with pembrolizumab in multiple solid tumor types. All expansion arms are actively enrolling patients in the ongoing Phase 1/1b clinical trial at a recommended dose of 18 mg administered intravenously every two weeks (IV Q2W). During the fourth quarter of 2025, Werewolf plans to release interim data from the monotherapy and combination expansion arms, including tolerability, response rate, and durability for patients with cutaneous melanoma and renal cell carcinoma. Werewolf expects to engage with regulatory authorities in the second half of 2025 to discuss potential registrational pathways for WTX-124 in advanced or metastatic cutaneous melanoma. WTX-330: a systemically delivered, conditionally activated Interleukin-12 (IL-12) INDUKINE molecule being developed in advanced or metastatic solid tumors. Actively enrolling in a Phase 1b/2 clinical trial (WTX-330x2102) in locally advanced or metastatic solid tumors. Anticipate determination of dosing regimen by the end of 2025. Preclinical-Stage INDUCER Molecules: WTX-1011: a potential first-in-class conditionally activated anti-STEAP1 T-cell engager to provide an improved therapeutic index. STEAP1 is a promising prostate cancer target with limited expression in normal tissues, but notable toxicities are associated with existing anti-STEAP1 T-cell engager therapy. Preclinical data demonstrated that PREDATOR® masking technology successfully silenced peripheral activity and prevented cytokine release. WTX-1011 has beneficial exposure in cynomolgus monkeys with a half-life close to 100 hours. WTX-1011 is stable in the periphery, with less than 0.7% of active INDUCER molecule detected. Effective masking of WTX-1011 is confirmed by low levels of cytokine production compared to a 10-fold lower dose of unmasked STEAP1 INDUCER molecule. Utilizing a novel and highly effective anti-CD3 masking strategy, Werewolf expects to nominate an additional candidate in the second half of 2025. Preclinical-Stage INDUKINE Portfolio: Werewolf’s previously announced development candidates WTX-712, its Interleukin-21 (IL-21) INDUKINE molecule, and WTX-518, its binding protein resistant Interleukin-18 (IL-18) INDUKINE molecule, each for the treatment of cancer, and WTX-921, a first-of-its-kind Interleukin-10 (IL-10) INDUKINE molecule for the treatment of inflammatory bowel disease (IBD) and potentially other inflammatory diseases, are available for partnering. Financial Results for the Second Quarter of 2025: Cash position: As of June 30, 2025, cash and cash equivalents were $77.6 million, compared to $92.0 million as of March 31, 2025. The Company believes its existing cash and cash equivalents as of June 30, 2025, will be sufficient to fund operational expenses and capital expenditure requirements into the fourth quarter of 2026. Research and development expenses: Research and development expenses were $13.1 million for the second quarter of 2025, compared to $15.3 million for the same period in 2024. General and administrative expenses: General and administrative expenses were $4.4 million for the second quarter of 2025, compared to $4.8 million for the same period in 2024. Net loss: Net loss was $18.0 million for the second quarter of 2025, compared to $17.2 million for the same period in 2024. About Werewolf Therapeutics: Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company is leveraging its proprietary PREDATOR® platform to design conditionally activated INDUKINE™ and INDUCER™ molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf is advancing WTX-124 in multiple tumor types as a single agent and in combination with an immune checkpoint inhibitor and WTX-330 in multiple solid tumor types as a single agent. Werewolf is leveraging positive data from its INDUKINE molecules to advance the development of INDUCER molecules. Werewolf’s first INDUCER development candidate, WTX-1011, targets STEAP1 for prostate cancer. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management; the projection of the cash runway; the expected timeline for the preclinical and clinical development of product candidates and the availability of data from such preclinical and clinical development; the timing of anticipated regulatory engagement; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-Q filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINE™, INDUCER™, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Investor Contact: Dan Ferry LifeSci Advisors 617.430.7576 [email protected] Media Contact: Amanda Sellers Deerfield Group 301.332.5574 [email protected] Company Contact: Tim Trost Chief Financial Officer Werewolf Therapeutics [email protected]

– WTX-124 Phase 1/1b clinical trial on track for data readouts and interactions with the FDA in the second half of the year – – First patient dosed in the Phase 1b/2 clinical trial of WTX-330, seeking to build on the clinical activity and tolerability demonstrated in the recently completed WTX-330 first-in-human Phase 1 trial – – Company announces development of its proprietary INDUCER™ T cell engager molecules; development candidate targeted by the end of the second quarter of 2025 – – Updated cash guidance provides runway into the fourth quarter of 2026 – WATERTOWN, Mass., May 08, 2025 (GLOBE NEWSWIRE) -- Werewolf Therapeutics, Inc. (the “Company” or “Werewolf”) (Nasdaq: HOWL), an innovative biopharmaceutical company pioneering the development of conditionally activated therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions, today provided a business update and reported financial results for the first quarter ended March 31, 2025. “Werewolf continues to build on our promising data and progress across our clinical-stage programs,” said Daniel J. Hicklin, Ph.D., President and Chief Executive Officer of Werewolf. “We remain on track in our Phase 1/1b clinical trial evaluating WTX-124 to share interim data and meet with the FDA to discuss potential registrational pathways in the second half of this year. Additionally, in recognition of Skin Cancer Awareness month, Werewolf is launching an educational campaign in May to highlight the differentiation of Werewolf’s conditionally activated therapeutics and patient experiences to date in the WTX-124 clinical trial. I am also pleased to report that we recently initiated a Phase 1b/2 clinical trial of WTX-330 to explore antitumor activity and optimize the exposure of our IL-12 INDUKINE molecule in the tumor microenvironment. Finally, Werewolf has been making significant progress towards nominating its first INDUCER T cell engager development candidate in the second quarter of 2025, with preclinical data demonstrating that PREDATOR® masking technology successfully silenced peripheral activity and prevented cytokine release. We believe that our proprietary PREDATOR masking and targeting technology distinctly positions us to build a robust pipeline of T cell engagers with potentially best-in-class potency and safety profiles, filling a gap in the current immuno-oncology landscape.” Recent Highlights and Upcoming Milestones WTX-124: a systemically delivered, conditionally activated Interleukin-2 (IL-2) INDUKINE molecule being developed as monotherapy and in combination with pembrolizumab in multiple solid tumor types. All expansion arms are actively enrolling patients in the ongoing Phase 1/1b clinical trial at a recommended dose of 18 mg administered intravenously every two weeks (IV Q2W). During the second half of 2025, Werewolf plans to present interim data from the monotherapy and combination expansion arms, including tolerability, response rate, and durability, and to engage with regulatory authorities to discuss potential registrational pathways for WTX-124, including strategies for accelerated approval. The data continue to demonstrate clinically meaningful anti-tumor activity with a tolerable safety profile in patients who have previously been treated with immune checkpoint inhibitors. Launching a skin cancer awareness campaign educating various stakeholders on WTX-124 patient outcomes to date and the innovative science underlying Werewolf’s IL-2 cytokine therapy. WTX-330: a systemically delivered, conditionally activated Interleukin-12 (IL-12) INDUKINE molecule being developed in advanced or metastatic solid tumors. Initiated patient dosing in a Phase 1b/2 clinical trial (WTX-330x2102) to optimize the exposure of WTX-330 in the tumor microenvironment, following the encouraging clinical activity and tolerability seen in the WTX-330x2101 first-in-human study. Preclinical Portfolio: Werewolf’s previously announced development candidates WTX-712, its Interleukin-21 (IL-21) INDUKINE molecule, and WTX-518, its binding protein resistant Interleukin-18 (IL-18) INDUKINE molecule, for the treatment of cancer, and WTX-921, a first-of-its-kind Interleukin-10 (IL-10) INDUKINE molecule for the treatment of inflammatory bowel disease (IBD) and potentially other inflammatory diseases, are available for partnering. Werewolf has extended its conditional activation technology to T cell engagers, utilizing a novel and highly effective anti-CD3 masking strategy for its INDUCER T cell engager molecules. Preclinical data demonstrate that the Company’s PREDATOR masking technology successfully silenced peripheral activity and prevented cytokine release in its INDUCER molecules. The Company’s first INDUCER development candidate is expected to be nominated in the second quarter of 2025. Financial Results for the First Quarter of 2025: Cash position: As of March 31, 2025, cash and cash equivalents were $92.0 million, compared to $111.0 million as of December 31, 2024. Based on updated forecasting, the Company now believes its existing cash and cash equivalents as of March 31, 2025, will be sufficient to fund operational expenses and capital expenditure requirements into the fourth quarter of 2026. Research and development expenses: Research and development expenses were $13.1 million for the first quarter of 2025, compared to $12.9 million for the same period in 2024. General and administrative expenses: General and administrative expenses were $4.9 million for the first quarter of 2025, compared to $5.0 million for the same period in 2024. Net loss: Net loss was $18.1 million for the first quarter of 2025, compared to $16.2 million for the same period in 2024. About Werewolf Therapeutics: Werewolf Therapeutics, Inc., is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body’s immune system for the treatment of cancer and other immune-mediated conditions. The Company is leveraging its proprietary PREDATOR® platform to design conditionally activated molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Werewolf’s INDUKINE molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. The Company’s most advanced clinical stage product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2) and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. Werewolf is advancing WTX-124 in multiple tumor types as a single agent and in combination with an immune checkpoint inhibitor and WTX-330 in multiple tumor types or Non-Hodgkin Lymphoma as a single agent. To learn more visit www.werewolftx.com. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Werewolf’s strategy, future operations, prospects, plans, and objectives of management; the projection of the cash runway; the expected timeline for the preclinical and clinical development of product candidates and the availability of data from such preclinical and clinical development; the potential activity and efficacy of product candidates in preclinical studies and clinical trials; and the anticipated safety profile of product candidates constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “aim,” “anticipate,” “believe,” “contemplate,” “continue,” “could,” “design,” “designed to,” “engineered,” “estimate,” “expect,” “goal,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “potential,” “predict,” “project,” “promise,” “should,” “target,” “will,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. The Company may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the development of product candidates, including the conduct of research activities, and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and the Company’s ability to submit and obtain regulatory approval for investigational new drug applications; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether preliminary or interim data from a clinical trial will be predictive of the future results of the trial and future clinical trials; the Company’s ability to manage cash resources and obtain additional cash resources to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; as well as the risks and uncertainties identified in the “Risk Factors” section of the Company’s most recent Form 10-K filed with the Securities and Exchange Commission (SEC), and in subsequent filings the Company may make with the SEC. In addition, the forward-looking statements included in this press release represent the Company’s views as of the date of this press release. The Company anticipates that subsequent events and developments will cause its views to change. However, while the Company may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. WEREWOLF®, the WEREWOLF logo, PREDATOR®, INDUKINE™, INDUCER™, and other Werewolf trademarks, service marks, graphics and logos are trade names, trademarks or registered trademarks of Werewolf Therapeutics, Inc., in the United States or other countries. All rights reserved. Investor Contact: Dan Ferry LifeSci Advisors 617.430.7576 [email protected] Media Contact: Amanda Sellers Deerfield Group 301.332.5574 [email protected] Company Contact: Tim Trost Chief Financial Officer Werewolf Therapeutics [email protected]

Wall Street expects a year-over-year decline in earnings on higher revenues when Werewolf Therapeutics, Inc. (HOWL) reports results for the quarter ended March 2025. While this widely-known consensus outlook is important in gauging the company's earnings picture, a powerful factor that could impact its near-term stock price is how the actual results compare to these estimates. The stock might move higher if these key numbers top expectations in the upcoming earnings report. On the other hand, if they miss, the stock may move lower. While management's discussion of business conditions on the earnings call will mostly determine the sustainability of the immediate price change and future earnings expectations, it's worth having a handicapping insight into the odds of a positive EPS surprise. This company is expected to post quarterly loss of $0.44 per share in its upcoming report, which represents a year-over-year change of -12.8%. Revenues are expected to be $1.5 million, up 102.7% from the year-ago quarter. The consensus EPS estimate for the quarter has remained unchanged over the last 30 days. This is essentially a reflection of how the covering analysts have collectively reassessed their initial estimates over this period. Investors should keep in mind that an aggregate change may not always reflect the direction of estimate revisions by each of the covering analysts. Estimate revisions ahead of a company's earnings release offer clues to the business conditions for the period whose results are coming out. This insight is at the core of our proprietary surprise prediction model -- the Zacks Earnings ESP (Expected Surprise Prediction). The Zacks Earnings ESP compares the Most Accurate Estimate to the Zacks Consensus Estimate for the quarter; the Most Accurate Estimate is a more recent version of the Zacks Consensus EPS estimate. The idea here is that analysts revising their estimates right before an earnings release have the latest information, which could potentially be more accurate than what they and others contributing to the consensus had predicted earlier. Thus, a positive or negative Earnings ESP reading theoretically indicates the likely deviation of the actual earnings from the consensus estimate. However, the model's predictive power is significant for positive ESP readings only. A positive Earnings ESP is a strong predictor of an earnings beat, particularly when combined with a Zacks Rank #1 (Strong Buy), 2 (Buy) or 3 (Hold). Our research shows that stocks with this combination produce a positive surprise nearly 70% of the time, and a solid Zacks Rank actually increases the predictive power of Earnings ESP. Please note that a negative Earnings ESP reading is not indicative of an earnings miss. Our research shows that it is difficult to predict an earnings beat with any degree of confidence for stocks with negative Earnings ESP readings and/or Zacks Rank of 4 (Sell) or 5 (Strong Sell). For Werewolf Therapeutics, the Most Accurate Estimate is lower than the Zacks Consensus Estimate, suggesting that analysts have recently become bearish on the company's earnings prospects. This has resulted in an Earnings ESP of -1.51%. On the other hand, the stock currently carries a Zacks Rank of #4. So, this combination makes it difficult to conclusively predict that Werewolf Therapeutics will beat the consensus EPS estimate. While calculating estimates for a company's future earnings, analysts often consider to what extent it has been able to match past consensus estimates. So, it's worth taking a look at the surprise history for gauging its influence on the upcoming number. For the last reported quarter, it was expected that Werewolf Therapeutics would post a loss of $0.43 per share when it actually produced a loss of $0.46, delivering a surprise of -6.98%. Over the last four quarters, the company has beaten consensus EPS estimates just once. An earnings beat or miss may not be the sole basis for a stock moving higher or lower. Many stocks end up losing ground despite an earnings beat due to other factors that disappoint investors. Similarly, unforeseen catalysts help a number of stocks gain despite an earnings miss. That said, betting on stocks that are expected to beat earnings expectations does increase the odds of success. This is why it's worth checking a company's Earnings ESP and Zacks Rank ahead of its quarterly release. Make sure to utilize our Earnings ESP Filter to uncover the best stocks to buy or sell before they've reported. Werewolf Therapeutics doesn't appear a compelling earnings-beat candidate. However, investors should pay attention to other factors too for betting on this stock or staying away from it ahead of its earnings release. Among the stocks in the Zacks Medical - Biomedical and Genetics industry, Tarsus Pharmaceuticals, Inc. (TARS) is soon expected to post loss of $0.73 per share for the quarter ended March 2025. This estimate indicates a year-over-year change of +27.7%. This quarter's revenue is expected to be $70.58 million, up 155.6% from the year-ago quarter. The consensus EPS estimate for Tarsus Pharmaceuticals has been revised 11.3% higher over the last 30 days to the current level. However, a higher Most Accurate Estimate has resulted in an Earnings ESP of 2.74%. When combined with a Zacks Rank of #3 (Hold), this Earnings ESP indicates that Tarsus Pharmaceuticals will most likely beat the consensus EPS estimate. The company beat consensus EPS estimates in each of the trailing four quarters. Stay on top of upcoming earnings announcements with the Zacks Earnings Calendar. Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Werewolf Therapeutics, Inc. (HOWL) : Free Stock Analysis Report Tarsus Pharmaceuticals, Inc. (TARS) : Free Stock Analysis Report This article originally published on Zacks Investment Research (zacks.com). Zacks Investment Research