On February 27, 2026 ALX Oncology Holdings Inc. ("ALX Oncology"; Nasdaq: ALXO), a clinical-stage biotechnology company advancing a pipeline of novel therapies designed to treat cancer and extend patients’ lives, reported financial results for the fourth quarter and full year 2025, and provided a corporate update.

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"Through strong execution of our targeted clinical development strategy in 2025, we have positioned ourselves to achieve multiple significant catalysts in the clinical programs for evorpacept and ALX2004, two potentially best- and first-in-class agents, in the coming 12 to 18 months," said Jason Lettmann, Chief Executive Officer at ALX Oncology. "We are particularly pleased that recent topline biomarker data from the Phase 1b/2 trial evaluating evorpacept with zanidatamab in advanced HER2-positive breast cancer reinforce findings from the ASPEN-06 HER2-positive gastric cancer trial, suggesting that CD47 is a predictive biomarker for evorpacept response. These findings strengthen our confidence in the ongoing Phase 2 ASPEN-09-Breast trial, where we will evaluate patient responses by CD47 level to further define the predictive potential of this biomarker among patients with HER2-positive disease that has progressed following ENHERTU.

"Additionally, we are pleased with the clinical progress of ALX2004, which has successfully cleared the first two dose cohorts in the ongoing Phase 1 trial. The potential of these two novel therapies, coupled with our substantial progress on their respective clinical programs, contributed to the successful completion of our recent financing. With our newly strengthened balance sheet, we now have the opportunity to deliver more robust and meaningful data readouts in both of our ongoing clinical programs, as reflected in our milestone updates," said Lettmann.

ALX Oncology Q4 and Full Year 2025 Highlights and Recent Developments

Evorpacept

Data from a pre-planned exploratory analysis of the Phase 2 ASPEN-06 clinical trial in gastric cancer showed that CD47 overexpression is a key predictive biomarker for evorpacept response and durable benefit in patients whose tumors have retained HER2 expression. Retained HER2 expression is defined as tumors that are HER2-positive following HER2-targeted treatment, as assessed by either a repeat tumor biopsy or HER2 gene amplification in circulating tumor DNA (ctDNA). These data were highlighted as part of a poster presentation at the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper) Annual Meeting in November 2025.
In patients with retained HER2-positive and CD47-high gastric cancer (n=43), evorpacept + HERCEPTIN (trastuzumab), CYRAMZA (ramucirumab) and paclitaxel (TRP) generated a 65.0% objective response rate (ORR) versus 26.1% ORR for TRP alone.
The duration of response (DOR) was three times longer in the evorpacept + TRP arm relative to TRP alone in these patients. Evorpacept + TRP generated a median DOR (mDOR) of 25.5 months versus 8.4 months mDOR for TRP alone. Progression-free survival (PFS) and overall survival (OS) data were also evaluated in these patients. Treatment with evorpacept + TRP resulted in a median PFS (mPFS) of 18.4 months versus 7.0 months for TRP alone, with a hazard ratio (HR) of 0.39. Treatment with evorpacept + TRP resulted in a median OS of 17 months versus 9.9 months for TRP alone, with an HR of 0.70.
Consistent with the results from the ASPEN-06 trial, topline data from an exploratory analysis in the Phase 1b/2 trial of evorpacept with investigational zanidatamab in advanced HER2-positive breast cancer suggest that CD47 expression level helps predict therapeutic response.
Researchers had previously reported primary trial results showing a 56% (5/9) confirmed objective response rate (cORR) and an mPFS of 7.4 months in the nine patients with centrally confirmed HER2-positive breast cancer who received the investigational combination (2024 San Antonio Breast Cancer Symposium).
In January 2026, ALX Oncology announced topline data from the exploratory analysis conducted to identify biomarkers of response to the evorpacept/zanidatamab combination. These findings show that among patients with centrally confirmed HER2-positive breast cancer, responses were largely restricted to patients with higher CD47 expression.
The full Phase 1b/2 trial biomarker analysis has been accepted for poster presentation at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Breast Cancer 2026 Annual Congress on May 7, 2026, in Berlin.
The Phase 2 ASPEN-09-Breast trial evaluating evorpacept plus trastuzumab and physician’s choice of chemotherapy in patients with HER2-positive breast cancer previously treated with ENHERTU (fam-trastuzumab deruxtecan-nxki) began enrollment in January 2026, and site activation remains on track globally. ALX Oncology has updated the primary objective of this trial to assess the overall response rate in patients whose tumors overexpress CD47. The company now plans to expand the number of patients enrolled in ASPEN-09-Breast – from 80 to up to 120 — to increase the number of patients whose cancer overexpresses this biomarker. The company expects to provide topline data for 80 patients in mid-2027.
The Sanofi-partnered, randomized Phase 1/2 UMBRELLA study evaluating evorpacept with SARCLISA (isatuximab-irfc) and dexamethasone in patients with previously treated multiple myeloma continues to enroll patients in the dose-optimization portion of the trial.
Data presented at the American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting 2025 from a Phase 2 investigator-sponsored trial (IST) of evorpacept in combination with standard-of-care rituximab and lenalidomide for patients with previously untreated, indolent B-cell non-Hodgkin lymphoma (iNHL) demonstrated a 100% ORR and 92% complete response (CR) rate (with historical control around 50%), and a one-year PFS rate of 91%. While longer follow-up matures, minimal residual disease (MRD) eradication rate with this novel regimen will be evaluated.
ALX2004

The Phase 1 trial of ALX2004, a novel antibody-drug conjugate (ADC) for the treatment of epidermal growth factor receptor (EGFR)-expressing solid tumors, began enrolling patients in the third dose cohort at 4mg/kg in January 2026, after no dose-limiting toxicities were observed in the prior two dose cohorts. ALX Oncology plans to share safety data from the dose-escalation phase of this trial in 2H 2026.
The ongoing ALX2004 Phase 1 dose-escalation portion of the trial is enrolling patients with previously treated advanced or metastatic non-small cell lung cancer (NSCLC), head and neck squamous cell carcinoma (HNSCC), esophageal squamous cell carcinoma (ESCC), and colorectal cancer (CRC).
ALX2004 preclinical data presented at the World ADC 2026 Conference and at the 2025 AACR (Free AACR Whitepaper)-NCI-EORTC International Conference on Molecular Targets and Cancer demonstrated potent preclinical anti-tumor activity in EGFR-expressing in vivo tumor models across multiple tumor types with differing levels of EGFR expression and varied mutational status across the EGFR signaling pathway. A favorable preclinical safety profile, including no skin toxicity or interstitial lung disease, was observed in pre-clinical toxicology studies at clinically relevant doses of ALX2004.
Corporate Update

In February 2026, the company completed a registered equity offering, selling 76,979,112 shares of common stock at $1.57 per share and pre-funded warrants to purchase 18,574,120 shares of common stock at $1.569 per underlying share. Gross proceeds from the offering were $150 million. Net proceeds of the offering were $140.4 million, after deducting the underwriting discount and other offering expenses.
After serving as Chief Medical Officer in an interim capacity since September 2025, Barbara Klencke, M.D., has been appointed to the position permanently. Dr. Klencke was instrumental in ALX Oncology’s clinical development progress over the past five months.
Upcoming Clinical Milestones

Phase 1b/2 trial evaluating evorpacept in combination with investigational zanidatamab in advanced HER2-positive breast cancer: Full biomarker analysis to be presented in a poster session on May 7, 2026, at the ESMO (Free ESMO Whitepaper) Breast Cancer 2026 Annual Congress.
Phase 2 ASPEN-09 breast cancer trial: Topline data readout for 80 patients anticipated in mid-2027.
Phase 1 ALX2004 trial: Safety data from the dose-escalation phase of trial anticipated in 2H 2026.
Fourth Quarter and Full Year 2025 Webcast Information

To access the conference call, please dial +1-877-407-0752 or +1-201-389-0912 and ask to be joined into the ALX Oncology Fourth Quarter and Full Year 2025 Financial Results Conference Call.

Another option for instant telephone access to the event is to use the Call me link below:

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A live audio webcast of the call, along with accompanying slides, will be available under "Events & Presentations" in the Investor section of the company’s website, www.alxoncology.com. An archived webcast will be available on the company’s website after the event.

Date & Time: Friday, February 27, 2026, 5:30 a.m. PT / 8:30 a.m. ET

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Fourth Quarter and Full Year 2025 Financial Results

Cash, Cash Equivalents and Investments: ALX held $48.3 million in cash, cash equivalents and investments as of December 31, 2025. Along with the $140.4 million in net proceeds from the February 2026 financing, the cash, cash equivalents and investments on hand are expected to be sufficient to fund ALX’s operating expenses through the first half of 2028.
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 product candidates, evorpacept and ALX2004, and R&D personnel-related expenses, including stock-based compensation. R&D expenses for the three months ended December 31, 2025 were $17.6 million compared to $23.5 million for the prior-year period, or a decrease of $5.9 million. This decrease was primarily attributable to a decrease of $2.7 million in stock-based compensation expense, a decrease of $2.5 million in personnel and related costs, and a decrease of $1.5 million in preclinical costs due to pipeline prioritization strategy. These decreases were partially offset by an increase of $0.6 million in clinical and development costs to support active clinical trials for ALX product candidates, evorpacept and ALX2004. R&D expenses for the year ended December 31, 2025, were $77.0 million compared to $116.4 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, 2025 were $5.4 million compared to $7.1 million for the prior year period, or a decrease of $1.7 million. This decrease was primarily attributable to a decrease in stock-based compensation expense and decreases in legal and corporate costs. G&A expenses for the year ended December 31, 2025 were $23.9 million compared to $26.1 million for the prior-year period.
Net loss: GAAP net loss was ($22.8) million for the three months ended December 31, 2025, or ($0.42) per basic and diluted share, as compared to a GAAP net loss of ($29.2) million for the three months ended December 31, 2024, or ($0.55) per basic and diluted share. The lower net loss is primarily attributed to lower R&D expenses. GAAP net loss was ($101.7) million for the year ended December 31, 2025, or ($1.90) per basic and diluted share, as compared to a GAAP net loss of ($134.9) million for the year ended December 31, 2024, or ($2.58) per basic and diluted share. Non-GAAP net loss was ($20.1) million for the three months ended December 31, 2025, as compared to a non-GAAP net loss of ($23.2) million for the three months ended December 31, 2024. Non-GAAP net loss was ($88.8) million for the year ended December 31, 2025, as compared to a non-GAAP net loss of ($107.5) million for the year ended December 31, 2024. A reconciliation of GAAP to non-GAAP financial results can be found at the end of this news release.

(Press release, ALX Oncology, FEB 27, 2026, View Source [SID1234663120])