Cogent Biosciences Announces Poster Presentations at the American Association for Cancer Research (AACR) Annual Meeting 2026
Rhea-AI Summary
Cogent Biosciences (Nasdaq: COGT) will present preclinical data at the AACR Annual Meeting 2026 in San Diego, April 17–22.
Key posters: CGT1263 (pan-KRAS(ON)) shows >500x selectivity for KRAS vs HRAS/NRAS, sustained pERK inhibition, robust antitumor activity and limited skin suppression; an IND submission is expected later this year. CGT4255 (EGFR-sparing ErbB2) shows >100-fold EGFR selectivity, best-in-class CNS penetration potential, activity against key HER2 mutations, and preclinical synergy with HER2 ADCs; Phase 1 is ongoing.
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News Market Reaction – COGT
In the Apr 17 session, COGT gained 2.93%, reflecting a moderate positive market reaction.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Historical Context
| Date | Event | Sentiment | 24h Move | Catalyst |
|---|---|---|---|---|
| Apr 01 | GIST NDA submission | Positive | -8.4% | Submitted NDA for bezuclastinib in imatinib‑resistant GIST with strong Phase 3 data. |
| Mar 16 | NDA acceptance | Positive | +5.0% | FDA accepted NonAdvSM NDA with PDUFA date and no identified review issues. |
| Feb 17 | Earnings & pipeline | Positive | +3.0% | Reported 2025 results, pivotal trial successes, and cash of $900.8M funding into 2028. |
| Feb 10 | SUMMIT posters | Positive | -0.5% | Announced extensive SUMMIT posters detailing NonAdvSM data and prior NDA filing. |
| Jan 26 | Breakthrough designation | Positive | +3.2% | Received Breakthrough Therapy Designation for bezuclastinib plus sunitinib in GIST. |
24h Move is the share-price change in the day after each event; other market factors may also have contributed.
Recent positive clinical and regulatory milestones have usually led to mild gains, but there are notable instances of negative or flat reactions even on strong data releases.
Over the last few months, Cogent has reported a series of positive milestones centered on bezuclastinib, including an NDA submission for imatinib‑resistant GIST on Apr 1, 2026, FDA acceptance of an NDA in NonAdvSM with a Dec 30, 2026 PDUFA date, and strong 2025 pivotal data with cash of $900.8M funding operations into 2028. Additional SUMMIT posters and Breakthrough Therapy Designation for bezuclastinib plus sunitinib further highlighted the franchise. Today’s AACR preclinical KRAS/ErbB2 posters extend that innovation story beyond bezuclastinib into earlier-stage oncology programs.
Key Terms
pan-KRAS(ON) inhibitor medical
ErbB2 medical
HER2 ADCs medical
Investigational New Drug (IND) regulatory
CNS medical
pERK medical
HER2 targeted ADCs medical
AI-generated analysis. How Rhea-AI works. Not financial advice.
– Updated presentation on Cogent’s potent pan-KRAS(ON) inhibitor, CGT1263, showcasing its selectivity profile which could lead to reduction in skin toxicity associated with multi-RAS inhibitors
– Updated presentation on Cogent’s brain penetrant ErbB2 inhibitor, CGT4255, with evidence of synergistic activity in combination with HER2 ADCs for resistant patients
WALTHAM, Mass. and BOULDER, Colo., April 17, 2026 (GLOBE NEWSWIRE) -- Cogent Biosciences, Inc. (Nasdaq: COGT), a biotechnology company focused on developing precision therapies for genetically defined diseases, today announced that preclinical data from the Company’s KRAS and ErbB2 pipeline programs will be presented during poster sessions at the American Association for Cancer Research (AACR) Annual Meeting 2026 taking place in April 17-22 in San Diego, CA.
“As we prepare for the potential launch of bezuclastinib later this year, we are excited to share updates from two of our pipeline programs this weekend at the 2026 annual AACR meeting,” said Andrew Robbins, Cogent’s President and Chief Executive Officer. “First, we are presenting data on CGT1263, our novel pan-KRAS(ON) inhibitor, which shows best-in-class cellular potency along with evidence that its kinase selectivity advantage over multi-RAS inhibitors could drive clinical differentiation with regards to skin toxicity, a current liability of advanced clinical programs. Separately, we provide an update on CGT4255, our novel, selective ErbB2 inhibitor that was specifically designed for its best-in-class CNS penetrant properties to address a significant unmet need for HER2+ patients with brain metastases. This presentation also includes preclinical data in combination with a HER2 ADC suggesting potential synergistic activity leading to improved duration of therapy as well as re-sensitization of patients following HER2 ADC resistance. With multiple potential blockbuster programs advancing in our pipeline, we believe these new data underscore the long-term potential of Cogent Biosciences.”
Poster Details
Title: Characterization of CGT1263, a KRAS (ON/OFF) inhibitor clinical candidate with selectivity for mutant KRAS over HRAS and NRAS
Session Category: Experimental and Molecular Therapeutics
Session Title: Novel Antitumor Agents 1
Session Date and Time: April 19, 2026 - 2:00 PM – 5:00 PM PT (5:00 PM – 8:00 PM ET)
Location: Poster Section 17
Poster Board Number: 13
Poster Number: 410
Mutations in KRAS are among the most prevalent mutations found in cancer, occurring most often in colorectal cancer, non-small cell lung cancer and pancreatic cancer. The preclinical poster highlights Cogent’s internally developed pan-KRAS(ON) inhibitor with >500x selectivity for KRAS over HRAS and NRAS. Plasma exposure following oral administration across species resulted in sustained pERK inhibition and robust antitumor activity. Tumor pERK inhibition was also achieved with limited skin suppression, supporting the potential of a larger therapeutic window for CGT1263 when compared to multi-RAS inhibitors currently in clinical development. This aligns with historical data implicating the RAS-MAPK-ERK pathway as essential for skin development given its role in regulation of keratinocyte proliferation, differentiation, and survival; combined suppression of multiple targets within this pathway is thought to be the driver of frequent rash observed in patients treated with multi-RAS inhibitors. Overall, these findings suggest CGT1263 could provide an advantage for patients, enabling higher dosing designed to elicit a more profound molecular response. Investigational New Drug (IND) enabling studies are ongoing with an IND submission expected later this year.
Title: Preclinical characterization of CGT4255, an EGFR sparing, pan-mutant HER2 clinical development candidate with potential best-in-class brain penetration
Session Category: Experimental and Molecular Therapeutics
Session Title: Tyrosine Kinase, Phosphatase, and Other Inhibitors
Session Date and Time: April 21, 2026 - 2:00 PM – 5:00 PM PT (5:00 PM – 8:00 PM ET)
Location: Poster Section 18
Poster Board Number: 7
Poster Number: 5869
Cogent’s EGFR-sparing, brain-penetrant ErbB2 inhibitor includes potent coverage of key mutations (YVMA, S310F, V842I, L755S) inadequately addressed by currently approved therapies. Activating mutations in the ErbB2 gene have been identified in multiple cancers and demonstrate a tumorigenic role similar to that of ErbB2 amplification. New data presented describe CGT4255’s >100-fold selectivity over EGFR while robustly engaging HER2 amplification, insertion and mutant lines in addition to reinforcing best-in-class potential CNS performance relative to other agents in development. Additional mechanistic studies presented suggest CGT4255 may have synergistic effects on efficacy and durability when combined with HER2 targeted ADCs. Preclinical evidence demonstrates that concurrent treatment of CGT4255 and T-DXd enhances receptor internalization and cancer cell apoptosis, suggesting the potential for a synergistic combination that could improve patient outcomes. The Phase 1 study of CGT4255 is ongoing.
Posters will be available on the ‘Posters and Publications’ page of Cogent’s website.
About Cogent Biosciences, Inc.
Cogent Biosciences is a biotechnology company focused on developing precision therapies for genetically defined diseases. The most advanced clinical program, bezuclastinib, is a selective tyrosine kinase inhibitor that is designed to potently inhibit the KIT D816V mutation as well as other mutations in KIT exon 17. KIT D816V is responsible for driving systemic mastocytosis, a serious disease caused by unchecked proliferation of mast cells. Exon 17 mutations are also found in patients with advanced gastrointestinal stromal tumors (GIST), a type of cancer with strong dependence on oncogenic KIT signaling. In addition, the Cogent Research Team is developing a portfolio of novel targeted therapies to help patients fighting serious, genetically driven diseases targeting mutations in ErbB2, PI3Kα, KRAS and JAK2. Cogent Biosciences is based in Waltham, MA and Boulder, CO. Visit our website for more information at www.cogentbio.com. Follow Cogent Biosciences on social media: X (formerly known as Twitter) and LinkedIn. Information that may be important to investors will be routinely posted on our website and X.
Forward-Looking Statements
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding the potential commercial launch of bezuclastinib later this year; the potential for the company’s novel pan-KRAS inhibitor to drive clinical differentiation with regards to skin toxicity and the expectation to file an IND for this program later this year; the potential for the company’s novel and selective ErbB2 inhibitor to provide synergistic benefit when combined with HER2 ADCs and to lead to improved patient outcomes; and the long-term potential for the company’s pipeline programs to produce multiple blockbuster programs. The use of words such as, but not limited to, "anticipate," "believe," "continue," "could," "estimate," "expect," "intend," "may," "might," "plan," "potential," "predict," "project," "should," "target," "will," or "would" and similar words expressions are intended to identify forward-looking statements. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, our clinical results, the rate of enrollment in our clinical trials and other future conditions. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. We may not actually achieve the forecasts or milestones disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to those set forth under the caption "Risk Factors" in Cogent's most recent Annual Report on Form 10-K filed with the SEC, as well as discussions of potential risks, uncertainties, and other important factors in our subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. Neither we, nor our affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as result of new information, future events or otherwise, except as required by law. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date hereof.
Contact:
Christi Waarich
Senior Director, Investor Relations
christi.waarich@cogentbio.com
617-830-1653
