Safety and Efficacy of Anti-CD47, ALX148 in Combination with Liposomal Doxorubicin and Pembrolizumab in Patients with Recurrent Platinum-resistant Ovarian Cancer: Phase II Study

Immunotherapy with immune checkpoint inhibitors, including pembrolizumab, have emerged as a promising option in several solid cancers with durable effect and low toxicity profile. However, the benefit is limited to smaller subset of solid tumors. This trial involves the enhancement of current immune checkpoint-based immunotherapy with ALX148, an agent that inhibits CD47 (a trans-membrane protein that is highly expressed on the surface of many solid tumors as compared to normal cells).

Start Date30 Mar 2023

Sponsor / Collaborator

University of Pittsburgh

[+2]

NCT05868226

/ RecruitingPhase 1

PRE-Investigation of Serial Studies to Predict Your Therapeutic Response With Imaging And moLecular Analysis: A Phase I/Ib Platform Trial

I-SPY Phase I/Ib (I-SPY-P1) is an open-label, multisite platform study designed to evaluate single agents or combinations in a metastatic treatment setting that may be relevant for breast cancer patients with the overall goal of moving promising drug regimens into the I-SPY 2 SMART Design Trial (NCT01042379) and/or other oncology-based trials in a timely manner.

Start Date22 Dec 2022

Sponsor / Collaborator

Quantumleap Healthcare Collaborative

NCT05524545

/ RecruitingPhase 1

A Phase 1, Open-label, Multicenter, Safety, Pharmacokinetic, Pharmacodynamic Study of ALX148 in Combination With Enfortumab Vedotin and/or Other Anticancer Therapies in Subjects With Urothelial Carcinoma (ASPEN-07)

AT148007 is a Phase 1, open-label, multicenter, safety, pharmacokinetic, pharmacodynamic study of ALX148 in combination with enfortumab vedotin and/or other anticancer therapies in subjects with urothelial carcinoma.

Start Date02 Nov 2022

Sponsor / Collaborator

ALX Oncology, Inc.

100 Clinical Results associated with Evorpacept

100 Translational Medicine associated with Evorpacept

100 Patents (Medical) associated with Evorpacept

Literatures (Medical) associated with Evorpacept

01 Jul 2024·CURRENT OPINION IN ONCOLOGY

State of the art and upcoming trends in HER2-directed therapies in gastrointestinal malignancies

Review

Author: Lee, Jaeyop ; Ku, Geoffrey

Purpose of review:

This review critically evaluates the evolution and current status of human epidermal growth factor receptor 2 (HER2)-directed therapies in upper gastrointestinal (GI) malignancies, a timely and relevant inquiry given the dynamic shifts in therapeutic strategies over the past decade. Initial enthusiasm following the Trastuzumab for Gastric Cancer (ToGA) study's demonstration of trastuzumab's efficacy, however, encountered hurdles due to subsequent trials showing limited progress, underscoring the necessity for a reevaluation of therapeutic approaches and the exploration of novel agents.

Recent findings:

The review highlights significant breakthroughs in the form of immune checkpoint inhibitors and innovative therapeutic technologies, which have redefined treatment paradigms and shown promising efficacy in HER2-positive cases. Emerging treatments such as trastuzumab deruxtecan (T-DXd), zanidatamab and evorpacept further illustrate the ongoing efforts to leverage unique mechanisms of action for improved HER2-positive antitumor activity.

Summary:

The advancements in HER2-directed therapies underscore a pivotal era in the management of upper GI malignancies. These developments not only reflect the profound impact of integrating novel therapeutic combinations but also highlight the critical role of ongoing research in overcoming resistance mechanisms and tailoring treatment to individual disease profiles.

01 Jan 2024·TRANSFUSION MEDICINE AND HEMOTHERAPY

Evorpacept-Induced Interference and Application of a Novel Mitigation Agent, Evo-NR, in Pretransfusion Testing

Article

Author: Kim, Tae Yeul ; Yoon, Eungjun ; Kim, Hyungsuk ; Cho, Duck

Introduction: Evorpacept is a CD47-blocking agent currently being developed for the treatment of various cancers. Interference by evorpacept in pretransfusion compatibility testing has been reported at limited plasma concentrations. Although various mitigation strategies have been proposed, none are practical. This in vitro study assessed evorpacept-induced interference at extended concentrations and investigated the capability of a novel mitigation agent, Evo-NR. Methods: Antibody screening tests were performed on evorpacept-spiked plasma with (anti-E and anti-Jk^a) or without alloantibodies at evorpacept concentrations up to 2,000 μg/mL using manual gel cards and automated analyzers. Evorpacept-coated red blood cells (RBCs) (rr [ce/ce], Fy[a+b−], S−s+) were tested by direct antiglobulin testing (DAT) and antigen typing using anti-Fy^b and anti-S reagents at indirect antiglobulin testing (IAT) phase. Evo-NR was used to resolve the interference in plasma and RBC samples. Flow cytometry was used to assess the mitigation effects. Results: Evorpacept-spiked plasma showed panreactive interference in antibody screening tests using manual gel cards (2+ to 3+) and automated analyzers (4+). A carryover effect was also observed in the automated analyzers. The use of a 3- to 6-fold molar excess of Evo-NR effectively resolved the interference in the plasma and enabled accurate alloantibody identification. Although the reduction in evorpacept binding to RBCs was identified via flow cytometry, Evo-NR was incapable of resolving the serologic interference observed in DAT and antigen typing at IAT phase. Discussion: Evorpacept showed constant panreactivity and a carryover effect at high concentrations. Evo-NR successfully resolved the interference in the plasma samples and could be considered a practical and efficient mitigation solution. Implementation of Evo-NR has the potential to support RBC transfusion for patients undergoing evorpacept treatment.

01 Dec 2021·The Lancet. OncologyQ1 · MEDICINE

Evorpacept alone and in combination with pembrolizumab or trastuzumab in patients with advanced solid tumours (ASPEN-01): a first-in-human, open-label, multicentre, phase 1 dose-escalation and dose-expansion study

Q1 · MEDICINE

Article

Author: Patricia LoRusso ; Hyun Cheol Chung ; Hong I Wan ; Keun-Wook Lee ; Nehal J Lakhani ; Pierre Squifflet ; Wells A Messersmith ; Justin F Gainor ; Yung-Jue Bang ; Jaume Pons ; Frank Stephen Hodi ; Won Seog Kim ; Laura Q M Chow ; Jeeyun Lee ; Philip Fanning ; Sophia S Randolph ; Feng Jin ; Rafael Santana-Davila ; Tracy C Kuo

BACKGROUND:

Both innate and adaptive immune responses are important components of anticancer immunity. The CD47-SIRPα interaction could represent an important pathway used by tumour cells to evade immune surveillance. We aimed to evaluate the safety, pharmacokinetics, pharmacodynamics, and anticancer activity of evorpacept (also known as ALX148), a high-affinity CD47-blocking protein with an inactive IgG Fc region in patients with solid tumours.

METHODS:

We did a first-in-human, open-label, multicentre, phase 1 dose-escalation and dose-expansion study at nine hospitals and one clinic in the USA and Korea. Eligible patients for the dose-escalation and safety lead-in phases were aged 18 years or older with histological or cytological diagnosis of advanced or metastatic solid tumours with no available standard therapy, measurable or unmeasurable disease according to the Response Evaluation Criteria in Solid Tumors version 1.1, and an Eastern Cooperative Oncology Group performance status score of 0 or 1. In the dose-escalation phase, which used a 3 + 3 design, patients received intravenous evorpacept at either 0·3, 1, 3, or 10 mg/kg once per week in 21-day cycles, or 30 mg/kg once every other week in 28-day cycles. In the safety lead-in phase, patients were given the maximum tolerable dose of evorpacept from the dose-escalation phase plus either intravenous pembrolizumab (200 mg administered once every 3 weeks) or intravenous trastuzumab (8 mg/kg loading dose followed by 6 mg/kg once every 3 weeks). In the dose-expansion phase, additional patients aged 18 years or older with second-line or later-line advanced malignancies were enrolled into three parallel cohorts: those with head and neck squamous cell carcinoma (HNSCC) and those with non-small-cell lung cancer (NSCLC) were given the maximum tolerated dose of evorpacept plus intravenous pembrolizumab (200 mg administered once every 3 weeks), and patients with HER2-positive gastric or gastroesophageal junction cancer were given the maximum tolerated dose of evorpacept plus intravenous trastuzumab (8 mg/kg loading dose followed by 6 mg/kg once every 3 weeks) until disease progression, voluntary withdrawal from the study, or unacceptable toxicity. The primary endpoint was the maximum tolerated dose of evorpacept administered as a single agent and in combination with pembrolizumab or trastuzumab, measured by the occurrence of dose-limiting toxicities during the first cycle, and was assessed in all patients who had received at least one dose of evorpacept. Secondary outcomes included the safety, tolerability, and antitumour activity of evorpacept, alone or in combination with pembrolizumab or trastuzumab. The primary outcome, safety, and tolerability were assessed in all patients who had received at least one dose of evorpacept, and antitumour activity was assessed in those who recieved at least one dose of study treatment and underwent at least one post-baseline tumor assessment. This trial is registered with ClinicalTrials.gov, NCT03013218.

FINDINGS:

Between March 6, 2017, and Feb 21, 2019, 110 patients received single-agent evorpacept (n=28), evorpacept plus pembrolizumab (n=52), or evorpacept plus trastuzumab (n=30), and were included in the safety analysis. Median follow-up was 29·1 months (95% CI not calculable [NC]-NC) in the single-agent cohort, 27·0 months (25·1-28·8) in the evorpacept plus pembrolizumab cohort, and 32·7 months (27·0-32·7) in the evorpacept plus trastuzumab cohort. Two (7%) dose-limiting toxicities in the first cycle were reported in patients who received single-agent evorpacept; neutropenia with an associated infection in one patient with gastroesophageal junction cancer who received 3 mg/kg once per week, and thrombocytopenia with associated bleeding in one patient with pancreatic cancer who received 30 mg/kg once every other week. No maximum tolerated dose was reached; the maximum administered doses were 10 mg/kg once per week or 30 mg/kg once every other week. The 10 mg/kg once per week dose was used in the expansion cohorts in combination with pembrolizumab or trastuzumab. The most common grade 3 or worse treatment-related adverse events were thrombocytopenia with single-agent evorpacept (two [7%] patients) and evorpacept plus pembrolizumab (two [4%]), and thrombocytopenia (two [7%]) and neutropenia (two [7%]) with evorpacept plus trastuzumab. In patients who received single-agent evorpacept, four treatment-related serious adverse events were reported. Five serious treatment-related adverse events related to evorpacept plus pembrolizumab were reported, and one serious adverse event related to evorpacept plus trastuzumab was reported. In response-evaluable patients in the dose-escalation phase (n=15) receiving single-agent evorpacept once per week, four (27%) had a best overall response of stable disease (two received 0·3 mg/kg, one received 3 mg/kg, and one received 10 mg/kg); in the 11 patients who received single-agent evorpacept at the highest dose of 30 mg/kg once every other week, two (18%) had stable disease. In the dose-expansion cohort, overall responses were recorded in four (20·0%; 95% CI 5·7-43·7) of 20 patients with HNSCC who received evorpacept plus pembrolizumab, in one (5·0%; 0·1-24·9) of 20 patients with NSCLC who received evorpacept plus pembrolizumab, and in four (21·1%; 6·1-45·6) of 19 patients with gastric or gastroesophageal junction cancer who received evorpacept plus trastuzumab.

INTERPRETATION:

The safety findings support the use of evorpacept in combination with pembrolizumab or trastuzumab for patients with advanced solid tumours. Preliminary antitumour activity results support future investigation of evorpacept combined with pembrolizumab or trastuzumab in patients with HNSCC, gastric or gastroesophageal junction cancer, and NSCLC.

FUNDING:

ALX Oncology.

112

News (Medical) associated with Evorpacept

08 Mar 2025

·www.prnewswire.com

Why the Global Cancer Market Could Surpass $900 Billion--And the Stocks Leading the Charge

USA News Group News Commentary Issued on behalf of Oncolytics Biotech Inc. VANCOUVER, BC, March 8, 2025 /PRNewswire/ -- As the global cancer crisis intensifies, the demand for breakthrough treatments is reaching new heights. Statista data projects a 20% rise in annual cases by 2030 and a staggering 75% increase by 2050. According to the World Health Organization (WHO), breast cancer cases are projected to rise by nearly 40% by 2050. Despite the concerning trends in cancer incidence, 2025 has seen key advancements from biotech companies at the forefront of oncology research, with Oncolytics Biotech Inc. (NASDAQ: ONCY) (TSX: ONC), Exelixis, Inc. (NASDAQ: EXEL), Cardiff Oncology, Inc. (NASDAQ: CRDF), ALX Oncology Holdings Inc. (NASDAQ: ALXO), and Verastem, Inc. (NASDAQ: VSTM) continuing to push the boundaries of cancer treatment. Continue Reading Pelareorep Facts (PRNewsfoto/USA News Group) The article continued: Within a new research report on the Global Oncology Market from Vision Research Reports, cancer therapies are projected to surpass US$903.81 billion by 2034, growing at a 10.9% CAGR along the way. The World Economic Forum is optimistic, recently touting 12 new breakthroughs in the fight against cancer. Oncolytics Biotech Inc. (NASDAQ: ONCY) (TSX: ONC), a clinical-stage company focused on immunotherapy for cancer, has just released its Q4 and full-year 2024 financial results, providing investors with a clearer picture of its progress as it moves toward potential future FDA approvals for its lead drug, pelareorep, a promising immunotherapy designed to help the immune system recognize and destroy cancer cells more effectively. "With multiple clinical trials surpassing expectations in 2024, 2025 is shaping up to be a defining year for Oncolytics," said Wayne Pisano, Chair of Oncolytics' Board of Directors and Interim CEO. "Our top priority is HR+/HER2- metastatic breast cancer, in which two randomized trials involving over 100 patients have shown substantial clinical benefit for patients receiving pelareorep and paclitaxel compared to paclitaxel monotherapy. We believe that if we can approximate the benefit we saw in BRACELET-1 in our planned registrational study, the progression-free survival benefit alone would support an accelerated approval submission." The data mentioned by Pisano from BRACELET-1 showed that patients receiving pelareorep and paclitaxel lived longer and responded better to treatment compared to those receiving paclitaxel alone. Given the consistency of these results, Oncolytics believes that its upcoming registration-enabling trial could pave the way for an accelerated approval submission with the FDA. This is an important development, as HR+/HER2- breast cancer is one of the most commonly diagnosed and treated breast cancers worldwide, representing a massive market opportunity for the company. Beyond breast cancer, Oncolytics is making significant progress in two other hard-to-treat cancers: pancreatic cancer and anal carcinoma. "When adding pancreatic and anal carcinoma to the list of addressable indications where we have generated compelling efficacy signals, pelareorep could have a meaningful impact for a multitude of patients," added Pisano. Oncolytics recently presented new data at the 2025 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium, showcasing pelareorep's potential to improve patient outcomes in these aggressive diseases. In anal cancer, results from the ongoing GOBLET study showed that 33% of patients responded to treatment when pelareorep was combined with atezolizumab, a checkpoint inhibitor. Notably, one patient experienced a complete response, with their cancer disappearing and staying undetectable for over 15 months. This level of response in such a difficult-to-treat cancer is highly encouraging, leading Oncolytics to expand the trial to enroll additional patients. Meanwhile, in pancreatic cancer, the company successfully cleared a critical safety review for its combination study using pelareorep with modified FOLFIRINOX with and without atezolizumab, allowing the trial to progress to the next phase. Pancreatic cancer has one of the lowest survival rates of any major cancer, and with few effective treatments available, pelareorep's continued success in this area could position Oncolytics as a key player in gastrointestinal oncology. From a financial standpoint, Oncolytics reported a cash position of $15.9 million at the end of 2024, giving it enough runway to continue executing on its clinical development strategy through the third quarter of 2025. While the company operates at a loss—as is typical for clinical-stage biotechs—it has been strategically managing its spending to ensure that key trials remain funded. Research and development expenses remained stable compared to the previous year, reflecting a disciplined financial approach that prioritizes high-impact studies. With several potentially transformative catalysts on the horizon, including the initiation of a registration-enabling study in breast cancer and new pancreatic cancer data expected later in the year, investors will be watching closely to see how Oncolytics navigates its next steps. The coming months will be crucial for Oncolytics as it pushes forward in its mission to bring pelareorep to market. With strong clinical results, growing regulatory support, and a well-managed cash position, the company is well-positioned to capitalize on its momentum. If its upcoming breast cancer study confirms the benefits seen in BRACELET-1, Oncolytics could find itself on a fast track to regulatory approval, potentially opening the door to a major commercial opportunity. Infographic - CONTINUED… Read this and more news for Oncolytics Biotech at: In other recent industry developments and happenings in the market include: Exelixis, Inc. (NASDAQ: EXEL), reported promising results earlier this year from a subgroup analysis of its Phase 3 CABINET trial, which evaluated cabozantinib in patients with advanced gastrointestinal (GI) neuroendocrine tumors (NETs). The data presented at ASCO GI 2025 showed that cabozantinib significantly improved progression-free survival (PFS) compared to placebo, with a median PFS of 8.5 months versus 5.6 months. The findings highlight cabozantinib's potential to become a new standard of care for GI NETs, an area with limited treatment options. The FDA is currently reviewing Exelixis' supplemental New Drug Application (sNDA), with a decision expected by April 3, 2025. "These new data add to the robust results from the CABINET trial that demonstrate the benefits of cabozantinib across a wide range of patients with neuroendocrine tumors and further underscore the potential of cabozantinib to become a much-needed new option for those with GI NET, which accounts for the majority of real-world patients with this tumor type," said Amy Peterson, M.D., Executive Vice President, Product Development & Medical Affairs, and Chief Medical Officer, Exelixis. "We look forward to continuing to work with the U.S. FDA as they review our regulatory application for cabozantinib for the treatment of patients with previously treated advanced neuroendocrine tumors." Cardiff Oncology, Inc. (NASDAQ: CRDF), a clinical-stage biotechnology company leveraging PLK1 inhibition to develop novel therapies across a range of cancers, recently shared its Q4 2024 and FY 2024 results and business update as it continues to advance its lead program, onvansertib, a promising PLK1 inhibitor targeting RAS-mutated metastatic colorectal cancer (mCRC). "2024 was a significant year for Cardiff Oncology as we shared positive data from the first 30 patients in our lead program in first-line RAS-mut mCRC," said Mark Erlander, Ph.D., CEO of Cardiff Oncology. In its latest Phase 2 trial (CRDF-004), patients receiving the 30mg dose of onvansertib showed a 64% objective response rate, nearly doubling the 33% response rate in the control group. Cardiff also secured a new U.S. patent covering the use of onvansertib in combination with bevacizumab (bev) for previously untreated KRAS-mutant mCRC patients, adding long-term value to its intellectual property. ALX Oncology Holdings Inc. (NASDAQ: ALXO) is pushing forward with key advancements in its clinical pipeline, including the continued development of evorpacept, a CD47-blocking immunotherapy designed to enhance the effects of existing cancer treatments. The company announced plans to expand clinical trials into breast and colorectal cancer, aiming to evaluate evorpacept in combination with trastuzumab for HER2-positive breast cancer and with cetuximab for colorectal cancer. "Our conviction in evorpacept's potential to deepen responses to important available anti-cancer antibody therapies, particularly in patients with HER2-positive cancers, has been strengthened by recent data," said Jason Lettmann, CEO at ALX Oncology. "We look forward to our near-term milestones with ASPEN-03 and ASPEN-04 topline results in head and neck cancer and discussion with the FDA regarding the registrational path in gastric cancer based on the ASPEN-06 data." In addition to its immunotherapy efforts, ALX Oncology is preparing to advance ALX2004, a novel EGFR-targeted antibody-drug conjugate (ADC), into the clinic, with an Investigational New Drug (IND) application planned for Q1 2025. Verastem, Inc. (NASDAQ: VSTM) is making strides in RAS/MAPK pathway-driven cancers, with new Phase 2 trial data on its lead combination therapy, avutometinib plus defactinib, set to be presented at the 2025 Society of Gynecologic Oncology (SGO) Annual Meeting. The investigational treatment has already earned Priority Review from the FDA, with a PDUFA decision expected by June 30, 2025, for patients with KRAS-mutant low-grade serous ovarian cancer (LGSOC). "The presentation of the RAMP 201 primary analysis, which served as the basis of the acceptance of our NDA that is under Priority Review with the FDA, includes additional subgroup analysis by KRAS mutational status," said Dan Paterson, President, and CEO of Verastem Oncology. "We also recognize the importance of these findings to the broader cancer community as part of our growing pool of data reinforcing the potential to change expectations in managing RAS/MAPK pathway-driven cancers." As Verastem moves forward with its RAMP clinical trials, the company continues to expand its pipeline, including a Phase 3 confirmatory trial (RAMP 301) in LGSOC and a collaboration with Amgen to evaluate its therapy in combination with LUMAKRAS™ for KRAS G12C mutant lung cancer. Source: CONTACT: USA NEWS GROUP [email protected] (604) 265-2873 DISCLAIMER: Nothing in this publication should be considered as personalized financial advice. We are not licensed under securities laws to address your particular financial situation. No communication by our employees to you should be deemed as personalized financial advice. Please consult a licensed financial advisor before making any investment decision. This is a paid advertisement and is neither an offer nor recommendation to buy or sell any security. We hold no investment licenses and are thus neither licensed nor qualified to provide investment advice. The content in this report or email is not provided to any individual with a view toward their individual circumstances. USA News Group is a wholly-owned subsidiary of Market IQ Media Group, Inc. ("MIQ"). MIQ has been paid a fee for Oncolytics Biotech Inc. advertising and digital media from the company directly. There may be 3rd parties who may have shares of Oncolytics Biotech Inc., and may liquidate their shares which could have a negative effect on the price of the stock. This compensation constitutes a conflict of interest as to our ability to remain objective in our communication regarding the profiled company. Because of this conflict, individuals are strongly encouraged to not use this publication as the basis for any investment decision. The owner/operator of MIQ own shares of Oncolytics Biotech Inc. which were purchased in the open market, and reserve the right to buy and sell, and will buy and sell shares of Oncolytics Biotech Inc. at any time without any further notice commencing immediately and ongoing. We also expect further compensation as an ongoing digital media effort to increase visibility for the company, no further notice will be given, but let this disclaimer serve as notice that all material, including this article, which is disseminated by MIQ has been approved by Oncolytics Biotech Inc.; this is a paid advertisement, we currently own shares of Oncolytics Biotech Inc. and will buy and sell shares of the company in the open market, or through private placements, and/or other investment vehicles. While all information is believed to be reliable, it is not guaranteed by us to be accurate. Individuals should assume that all information contained in our newsletter is not trustworthy unless verified by their own independent research. Also, because events and circumstances frequently do not occur as expected, there will likely be differences between the any predictions and actual results. Always consult a licensed investment professional before making any investment decision. Be extremely careful, investing in securities carries a high degree of risk; you may likely lose some or all of the investment. Logo: SOURCE USA News Group WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Phase 2Clinical ResultASCOImmunotherapyPhase 3

06 Mar 2025

·ir.alxoncology.com

ALX Oncology Reports Fourth Quarter and Full Year 2024 Financial Results and Provides Corporate Update

– Presented positive updated data from ASPEN-06 Phase 2 trial demonstrating evorpacept generates strong response and durable clinical benefit in patients with HER2-positive gastric cancer in an oral presentation at 2025 ASCO GI – Presented Phase 1b/2 data demonstrating evorpacept in combination with zanidatamab generates promising anti-tumor activity in advanced breast cancer at SABCS 2024 – Announced focused development plan during R&D Day, including introduction of clinical trials evaluating evorpacept plus anti-cancer antibodies in breast and colorectal cancers and novel EGFR-targeted antibody-drug conjugate (ADC) clinical candidate ALX2004 – Strategic prioritization and resource optimization efforts expected to extend cash runway into Q4 2026 – Announced multiple key additions to leadership team and Board of Directors SOUTH SAN FRANCISCO, Calif., March 06, 2025 (GLOBE NEWSWIRE) -- ALX Oncology Holdings Inc., (“ALX Oncology” or “the Company”) (Nasdaq: ALXO), a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives, today reported financial results for the fourth quarter and full year ended December 31, 2024, and provided a corporate update. “In 2024, we delivered strong progress and continued momentum for our clinical development program evaluating evorpacept as a potential first- and best-in-class CD47 blocker with the ability to deepen and enhance responses to a variety of important, available therapies across a wide range of cancer types,” said Jason Lettmann, Chief Executive Officer of ALX Oncology. “With multiple important clinical trial readouts, significant momentum for our ongoing clinical studies and key additions to our leadership team, we have positioned ALX Oncology for near- and long-term success. Yesterday during our R&D Day webcast, we shared updates on how we are prioritizing operations and capital to support our new and ongoing clinical programs that are expected to extend our cash runway into the fourth quarter of 2026, including taking the difficult decision to streamline our organization aligned to these priorities.” Fourth Quarter 2024 Highlights and Recent Developments At the 2025 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium in January 2025, reported updated results from the multi-center, international ASPEN-06 Phase 2 clinical trial (NCT05002127) evaluating evorpacept in combination with HERCEPTIN® (trastuzumab), CYRAMZA® (ramucirumab) and paclitaxel (Evo-TRP) against trastuzumab, CYRAMZA (ramucirumab) and paclitaxel (TRP) for the treatment of patients with HER2-positive gastric/gastroesophageal junction (GEJ) cancer, where all patients had received an anti-HER2 agent in prior lines of therapy. Data highlighted evorpacept as the first CD47-blocker to show substantial tumor response and a well-tolerated safety profile in a prospective randomized trial. Greatest benefit observed among patients with confirmed HER2-positive cancer, as demonstrated by either fresh biopsy or ctDNA HER2-expression, with a confirmed objective response rate (cORR) of 48.9% and median duration of response (mDOR) of 15.7 months vs. 24.5% ORR and mDOR of 9.1 months in the control group, and a progression-free survival Hazard Ratio of 0.64. Evo-TRP was generally well tolerated, with the incidence of adverse events in the evorpacept population consistent with those in TRP control. At the San Antonio Breast Cancer Symposium (SABCS) 2024, presented new data from the Phase 1b/2 clinical trial demonstrating evorpacept in combination with zanidatamab generates promising antitumor activity in metastatic breast cancer (mBC). Patients who were HER2-positive by central assessment (n=9) showed the greatest anti-tumor activity with a cORR of 55.6% and a median progression-free survival (mPFS) of 7.4 months. Combination therapy was well tolerated with a manageable safety profile consistent with prior experience with each investigational agent. Announced strategic prioritization and resource optimization efforts, including approximately 30% workforce reduction primarily in preclinical research, expected to extend cash runway into Q4 2026. Announced key additions to our leadership team and Board of Directors throughout 2024 and early 2025. Allison Dillon, Ph.D., an experienced drug development, commercial strategy and business development leader, as Chief Business Officer. Alan Sandler, M.D., a distinguished leader with more than 30 years of experience in oncology and drug development, as Chief Medical Officer. Harish Shantharam, CFA, a proven biotech industry executive with over two decades of senior leadership experience in finance, commercial and corporate operations, as Chief Financial Officer. Barbara Klencke, M.D., a seasoned clinical leader in oncology drug development with more than 20 years of industry experience, appointed to ALX Oncology’s Board of Directors. Chris H. Takimoto, M.D., Ph.D., FACP, a distinguished researcher and drug developer with a proven track record in oncology with 17 years of industry experience, appointed to ALX Oncology’s Board of Directors. Announced that Jaume Pons, Ph.D., Founder, President and Chief Scientific Officer, will be departing from his current position and transitioning to the role of Senior Scientific Advisor in Q2 2025. Data highlighted evorpacept as the first CD47-blocker to show substantial tumor response and a well-tolerated safety profile in a prospective randomized trial. Greatest benefit observed among patients with confirmed HER2-positive cancer, as demonstrated by either fresh biopsy or ctDNA HER2-expression, with a confirmed objective response rate (cORR) of 48.9% and median duration of response (mDOR) of 15.7 months vs. 24.5% ORR and mDOR of 9.1 months in the control group, and a progression-free survival Hazard Ratio of 0.64. Evo-TRP was generally well tolerated, with the incidence of adverse events in the evorpacept population consistent with those in TRP control. Patients who were HER2-positive by central assessment (n=9) showed the greatest anti-tumor activity with a cORR of 55.6% and a median progression-free survival (mPFS) of 7.4 months. Combination therapy was well tolerated with a manageable safety profile consistent with prior experience with each investigational agent. Allison Dillon, Ph.D., an experienced drug development, commercial strategy and business development leader, as Chief Business Officer. Alan Sandler, M.D., a distinguished leader with more than 30 years of experience in oncology and drug development, as Chief Medical Officer. Harish Shantharam, CFA, a proven biotech industry executive with over two decades of senior leadership experience in finance, commercial and corporate operations, as Chief Financial Officer. Barbara Klencke, M.D., a seasoned clinical leader in oncology drug development with more than 20 years of industry experience, appointed to ALX Oncology’s Board of Directors. Chris H. Takimoto, M.D., Ph.D., FACP, a distinguished researcher and drug developer with a proven track record in oncology with 17 years of industry experience, appointed to ALX Oncology’s Board of Directors. Upcoming Clinical Milestones Head and Neck Squamous Cell Carcinoma: Topline results from Phase 2 ASPEN-03 randomized clinical trial of evorpacept with KEYTRUDA® (pembrolizumab) anticipated in Q2 2025 Head and Neck Squamous Cell Carcinoma: Topline results from Phase 2 ASPEN-04 randomized clinical trial of evorpacept with KEYTRUDA and chemotherapy anticipated in Q2 2025 Urothelial Cancer: Updated results from Phase 1 ASPEN-07 clinical trial of evorpacept in combination with PADCEV® (enfortumab vedotin) anticipated in Q2 2025 Gastric/GEJ Cancer: Regulatory guidance on the gastric cancer registrational path to be provided in Q2 2025 Breast Cancer: Topline results from Phase 1b I-SPY clinical trial of evorpacept with ENHERTU® (fam-trastuzumab deruxtecan-nxki) anticipated in 2H 2025 Breast Cancer: Patient dosing anticipated to initiate for ASPEN-BREAST Phase 2 clinical trial in mid-year 2025 Colorectal Cancer (CRC): Patient dosing anticipated to initiate for ASPEN-CRC Phase 1b clinical trial in mid-year 2025 New ADC Clinical Candidate: Novel EGFR-directed ADC, ALX2004, planned IND submission in March 2025 2024 Full Year and Fourth Quarter Financial Results: Cash, Cash Equivalents and Investments: Cash, cash equivalents and investments as of December 31, 2024, were $131.3 million. The Company believes its cash, cash equivalents and investments are sufficient to fund planned operations into Q4 of 2026. Potential impact of near-term catalysts related to ASPEN-03/04 HNSCC read out and FDA interaction on ASPEN-06 (for e.g., gastric cancer accelerated approval and/or Phase 3 initiation) are excluded from cash runway guidance. Research and Development (“R&D”) Expenses: R&D expenses consist primarily of preclinical, clinical and development costs related to the development of the Company’s current lead product candidate, evorpacept, and R&D personnel-related expenses including stock-based compensation. R&D expenses for the three months ended December 31, 2024 were $23.5 million compared to $41.8 million for the prior-year period or a decrease of $18.3 million. This decrease was primarily attributable to a decrease of $17.3 million in clinical and development costs primarily due to less manufacturing of clinical trial materials to support active clinical trials for our lead product candidate, evorpacept, and a decrease in stock-based compensation expense slightly offset by increased preclinical costs for development of new targets and increased personnel and related costs. R&D expenses for the year ended December 31, 2024 were $116.4 million, compared to $141.8 million for the prior-year period. General and Administrative (“G&A”) Expenses: G&A expenses consist primarily of administrative personnel-related expenses, including stock-based compensation and other costs such as legal and other professional fees, patent filing and maintenance fees, and insurance. G&A expenses for the three months ended December 31, 2024 were $7.1 million compared to $6.2 million for the prior year period or an increase of $0.8 million. This increase was primarily attributable to an increase in personnel and related costs. G&A expenses for the year ended December 31, 2024 were $26.1 million compared to $28.5 million for the prior-year period. Net loss: GAAP net loss was ($29.2) million for the three months ended December 31, 2024, or ($0.55) per basic and diluted share, as compared to a GAAP net loss of ($45.5) million for the three months ended December 31, 2023, or ($0.93) per basic and diluted share. The lower net loss is primarily attributed to lower R&D expenses. GAAP net loss was ($134.9) million for the year ended December 31, 2024, or ($2.58) per basic and diluted share, as compared to a GAAP net loss of ($160.8) million for the year ended December 31, 2023, or ($3.74) per basic and diluted share. Non-GAAP net loss was ($23.2) million for the three months ended December 31, 2024, as compared to a non-GAAP net loss of ($38.7) million for the three months ended December 31, 2023. Non-GAAP net loss was ($107.5) million for the year ended December 31, 2024, as compared to a non-GAAP net loss of ($134.3) million for the year ended December 31, 2023. A reconciliation of GAAP to non-GAAP financial results can be found at the end of this news release. About ALX Oncology ALX Oncology (Nasdaq: ALXO) is a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives. ALX Oncology’s lead therapeutic candidate, evorpacept, has demonstrated potential to serve as a cornerstone therapy upon which the future of immuno-oncology can be built. Evorpacept is currently being evaluated across multiple ongoing clinical trials in a wide range of cancer indications. More information is available at www.alxoncology.com and on LinkedIn @ALX Oncology. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. Forward-looking statements include statements regarding future results of operations and financial position, business strategy, product candidates, planned preclinical studies and clinical trials, results of clinical trials, research and development costs, regulatory approvals, timing and likelihood of success, plans and objectives of management for future operations, as well as statements regarding industry trends. Such forward-looking statements are based on ALX Oncology’s beliefs and assumptions and on information currently available to it on the date of this press release. Forward-looking statements may involve known and unknown risks, uncertainties and other factors that may cause ALX Oncology’s actual results, performance or achievements to be materially different from those expressed or implied by the forward-looking statements. These and other risks are described more fully in ALX Oncology’s filings with the Securities and Exchange Commission (“SEC”), including ALX Oncology’s Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and other documents ALX Oncology files with the SEC from time to time. Except to the extent required by law, ALX Oncology undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made. Use of Non-GAAP Financial Measures We supplement our consolidated financial statements presented on a GAAP basis by providing additional measures which may be considered “non-GAAP” financial measures under applicable SEC rules. We believe that the disclosure of these non-GAAP financial measures provides our investors with additional information that reflects the amounts and financial basis upon which our management assesses and operates our business. These non-GAAP financial measures are not in accordance with generally accepted accounting principles and should not be viewed in isolation or as a substitute for reported, or GAAP, net loss, and are not a substitute for, or superior to, measures of financial performance performed in conformity with GAAP. “Non-GAAP net loss” is not based on any standardized methodology prescribed by GAAP and represents GAAP net loss adjusted to exclude stock-based compensation expense and accretion of term loan discount and issuance costs. Non-GAAP financial measures used by ALX Oncology may be calculated differently from, and therefore may not be comparable to, non-GAAP measures used by other companies. Investor Relations Contact: Elhan Webb, CFA, IR Consultant ewebb@alxoncology.com Media Contact: Audra Friis, Sam Brown, Inc. audrafriis@sambrown.com (917) 519-9577

Clinical ResultPhase 2Financial StatementPhase 1ASCO

27 Feb 2025

·ir.alxoncology.com

ALX Oncology to Report Fourth Quarter and Full Year 2024 Financial Results on March 6, 2025

SOUTH SAN FRANCISCO, Calif., Feb. 27, 2025 (GLOBE NEWSWIRE) -- ALX Oncology Holdings Inc., (“ALX Oncology” or the “Company”) (Nasdaq: ALXO), a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives, today announced plans to report its fourth quarter and full year 2024 financial results on Thursday, March 6th, 2025, before market open. The company will not be hosting a teleconference in conjunction with its financial results press release. About ALX Oncology ALX Oncology (Nasdaq: ALXO) is a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives. ALX Oncology’s lead therapeutic candidate, evorpacept, has demonstrated potential to serve as a cornerstone therapy upon which the future of immuno-oncology can be built. Evorpacept is currently being evaluated across multiple ongoing clinical trials in a wide range of cancer indications. More information is available at www.alxoncology.com and on LinkedIn @ALX Oncology. Investor Relations Contact: Elhan Webb, CFA, IR Consultant ewebb@alxoncology.com Media Contact: Audra Friis, Sam Brown, Inc. audrafriis@sambrown.com (917) 519-9577

Financial StatementImmunotherapy

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R&D Status

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Indication	Highest Phase	Country/Location	Organization	Date
HER2-expressing Gastric Adenocarcinoma	Phase 3	United States	Eli Lilly & Co.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	United States	ALX Oncology, Inc.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Japan	ALX Oncology, Inc.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Japan	Eli Lilly & Co.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Australia	ALX Oncology, Inc.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Australia	Eli Lilly & Co.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Belgium	Eli Lilly & Co.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Belgium	ALX Oncology, Inc.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Czechia	ALX Oncology, Inc.	15 Jan 2022
HER2-expressing Gastric Adenocarcinoma	Phase 3	Czechia	Eli Lilly & Co.	15 Jan 2022

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Study	Phase	Population	Analyzed Enrollment	Group	Results	Evaluation	Publication Date


ASPEN-06 (Corporate Publications) Manual	Phase 2/3	HER2 positive Gastrooesophageal junction cancer \| HER2-positive gastric cancer HER2 Positive	127	Evorpacept + Trastuzumab + Ramucirumab + Paclitaxel	ferzvnxmpr(ejpchgdvrr) = htmcssajrp juxsjuzqfm (bfuanuihaw, 29.0 - 54.4) View more	Positive	23 Jan 2025
				Trastuzumab + Ramucirumab + Paclitaxel	ferzvnxmpr(ejpchgdvrr) = rvjeozamgm juxsjuzqfm (bfuanuihaw, 16.3 - 39.1) View more
NCT05002127 (ASPEN-06, ASCO_GI2025) Manual	Phase 2/3	HER2 Positive Gastroesophageal Adenocarcinoma \| HER2-positive gastric cancer HER2+	127	EvorpaceptEvorpacept (ALX148) + Trastuzumab (T) + Ramucirumab (R) + Paclitaxel (P)	phroacjcae(tkqqjzoppx) = asgvmfkmdj nwxxpdtfnt (frkikbefsm ) View more	Positive	23 Jan 2025
				Trastuzumab (T) + Ramucirumab (R) + Paclitaxel (P)	phroacjcae(tkqqjzoppx) = gvojugbvrf nwxxpdtfnt (frkikbefsm ) View more
NCT05002127 (ASPEN-06, Company_Website) Manual	Phase 2/3	HER2-positive gastric cancer \| HER2 positive Gastroesophageal Junction Adenocarcinoma HER2 Positive	127	Evorpacept + trastuzumab + CYRAMZA + paclitaxel	boswbrdgjf(wmtyvvhmjm) = puvayfldyl czioptqfbb (tjbgiyburk ) View more	Positive	31 Jul 2024
				Trastuzumab + CYRAMZA + paclitaxel	boswbrdgjf(wmtyvvhmjm) = eqyhmwehdl czioptqfbb (tjbgiyburk ) View more
NCT05524545 (ASCO2024) Manual	Phase 1	Locally Advanced Urothelial Carcinoma \| Metastatic urothelial carcinoma	20	Evorpacept 20 mg/kgenfortumab vedotin	wpgskvqlor(gkpdskcpax) = Not observed. amdrpadqnc (ntxrrlyzep ) View more	Positive	24 May 2024
NCT05167409 (ASCO2024) Manual	Phase 2	Metastatic Microsatellite Stable Colorectal Carcinoma Microsatellite Stable (MSS)	16	Evorpacept (E) 15 mg/kgcetuximabpembrolizumab	ctihpdcxgf(vuhimzmldw) = dktcvfinyv kkrrzjxyeg (egiofydcud ) View more	Negative	24 May 2024
NCT05025800 (AACR2024) Manual	Phase 1	Non-Hodgkin Lymphoma	20	Evorpacept+rituximab+lenalidomide	lfwlbgmotr(ndmsidqpww) = tkualvosib mvfxyfoaug (ehgpffcmps ) View more	Positive	05 Apr 2024
NCT05002127 (ASPEN-06, NEWS) Manual	Phase 2	Metastatic HER2 positive gastroesophageal junction cancer \| HER2-positive gastric cancer Second line HER2 Positive	54	Evorpacept 30 mg/kg+trastuzumab + CYRAMZA + paclitaxel	jdhohnpxci(mbcuoozcqy) = uskezqowfi ivvxazpcsk (hhnuxuwymx ) View more	Positive	03 Oct 2023
				trastuzumab + CYRAMZA + paclitaxel	jdhohnpxci(mbcuoozcqy) = tgcvyzvmdq ivvxazpcsk (hhnuxuwymx ) View more
NCT04755244 (ASPEN-05, ASH 12022 \| ASH 22022) Manual	Phase 1/2	Acute Myeloid Leukemia	14	Evorpacept+Venetoclax+Azacitidine	hhbsvbjbfx(aarciuoqsu) = hjthokleiv smxkbxmted (kdywswxqsw )	Positive	15 Nov 2022
NCT04675294 (ASPEN-03, SITC2022)	Phase 2	Advanced Head and Neck Squamous Cell Carcinoma First line PD-L1-positive (CPS â¥1) \| human papilloma virus (HPV) (p16) status	-	Evorpacept + Pembrolizumab	bpyomqhqho(dpowrihise) = sibxkqynci mveirediuw (fridvdlawz )	Positive	07 Nov 2022
NCT03013218 (ASPEN-01, SITC2021)	Phase 1	Squamous Cell Carcinoma of Head and Neck \| Gonorrhea HER2-positive	-	Evorpacept 10 mg/kg QW	eqdjrtlixh(aclhuplcep) = 8 patients experienced TRAEs, where the most common were urticaria, rash, and diarrhea (each n=3, 17%), fatigue and pruritus (each n=2, 11%) agoihiyymn (qarfilbsuw )	Positive	10 Nov 2021
				Evorpacept 15 mg/kg QW

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