Company Description
Foghorn Therapeutics Inc. (Nasdaq: FHTX) is a clinical-stage biotechnology company focused on discovering and developing a novel class of medicines that target genetically determined dependencies within the chromatin regulatory system. The company describes its approach as treating serious diseases by correcting abnormal gene expression, with an initial focus in oncology and multiple product candidates in development for cancer.
According to Foghorn, its work centers on the chromatin regulatory system, a key controller of gene expression. The company has built a proprietary, scalable Gene Traffic Control® platform to systematically study, identify, and validate potential drug targets within this system. By focusing on genetically defined dependencies in chromatin regulation, Foghorn aims to design precision therapies for cancers where conventional approaches have left significant unmet needs.
Gene Traffic Control® platform and chromatin focus
Foghorn’s Gene Traffic Control platform is described as a systematic and scalable engine for understanding how components of the chromatin regulatory system drive disease. Through this platform, the company identifies targets where cancer cells rely on specific chromatin regulators for survival, creating genetically determined dependencies that can be exploited therapeutically. This platform underpins both its small-molecule inhibitor and protein degrader programs in oncology.
The company’s programs highlight several chromatin-related targets, including SMARCA2/SMARCA4 within the BAF complex, as well as CBP, EP300, and ARID1B. Foghorn reports that these targets are implicated in a range of solid tumors and hematologic malignancies and often show synthetic lethal relationships that can be leveraged to selectively kill tumor cells while aiming to spare normal tissue.
Oncology pipeline and key programs
Foghorn states that it is developing multiple product candidates in oncology, anchored by both partnered and wholly owned programs:
- FHD-909 (LY4050784): A first-in-class, oral, allosteric small molecule that selectively inhibits the ATPase activity of SMARCA2 (BRM) over its closely related paralog SMARCA4 (BRG1), two proteins described as catalytic engines across all forms of the BAF complex. Preclinical data cited by the company indicate that tumors with SMARCA4 mutations rely on SMARCA2 for survival and that FHD-909 has shown significant anti-tumor activity across multiple SMARCA4-mutant lung tumor models. A Phase 1 multi-center dose-escalation trial is enrolling patients with SMARCA4-mutated cancers, with non-small cell lung cancer (NSCLC) as the primary target population.
- Selective CBP degrader program: Foghorn is advancing a selective CBP degrader that targets CBP, an acetyltransferase closely related to EP300. The company reports that CBP lineage dependencies are established in several cancers, including ER+ breast cancer, and that EP300-mutant cancers include endometrial, cervical, ovarian, bladder, and colorectal cancer. Preclinical data have shown anti-tumor activity in EP300-mutant solid tumors and CBP-dependent cancers, including ER+ breast cancer, and a long-acting injectable formulation has been optimized for subcutaneous administration. The program is described as tracking toward being IND-ready.
- Selective EP300 degrader program: Foghorn is developing a selective EP300 degrader for hematologic malignancies and prostate cancer. EP300 lineage dependencies are reported in multiple myeloma (MM) and diffuse large B-cell lymphoma (DLBCL). Preclinical data summarized by the company show broad anti-tumor activity across a range of hematologic malignancies, efficacy in IMiD-resistant MM cell lines, and a tolerability profile that differentiates selective EP300 degradation from dual CBP/EP300 approaches. The program is described as moving toward IND-enabling studies with an initial focus on MM and DLBCL.
- Selective ARID1B degrader program: Foghorn’s selective ARID1B degrader is designed to target ARID1B in ARID1A-mutated cancers. The company notes that ARID1A is the most mutated subunit in the BAF complex and among the most mutated proteins in cancer, leading to a dependency on ARID1B in several tumor types, including endometrial, gastric, gastroesophageal junction, bladder, ovarian, colorectal, and NSCLC. Foghorn reports that it has developed VHL- and cereblon-based bifunctional degraders with potential for oral delivery, achieved selective degradation of ARID1B, and observed modulation of downstream target genes, with the program advancing toward in vivo proof of concept.
Strategic collaboration and business model elements
Foghorn’s disclosures describe an ongoing strategic collaboration with Lilly to develop novel oncology medicines. This collaboration includes a U.S. 50/50 co-development and co-commercialization agreement for the selective SMARCA2 oncology program, which encompasses both a selective inhibitor (FHD-909) and a selective degrader, as well as an additional undisclosed oncology target. The collaboration also covers three discovery programs arising from Foghorn’s Gene Traffic Control platform. In its financial updates, the company attributes collaboration revenue to the advancement of programs under this Lilly collaboration agreement.
Beyond the Lilly partnership, Foghorn highlights its broader degrader and chromatin biology platform, including work on novel ligases, long-acting injectables, oral delivery, and induced proximity approaches. These efforts are positioned as enabling technologies to support current and future oncology programs that exploit chromatin regulatory dependencies.
Capital markets activity and listing
Foghorn Therapeutics’ common stock is registered on The Nasdaq Global Market under the symbol FHTX, as reflected in its Form 8-K filings. The company has used shelf registration statements on Form S-3 to support equity financings, including a registered direct financing that raised approximately $50 million in gross proceeds through the sale of common stock, pre-funded warrants, and series warrants. The company has also reported collaboration revenue, research and development expenses, and general and administrative expenses in periodic updates furnished via Form 8-K.
Foghorn has described a balance sheet that includes cash, cash equivalents, and marketable securities intended to support continued investment in its pipeline and chromatin-focused research platform. These capital resources, together with collaboration funding, form the financial foundation for advancing its clinical and preclinical oncology programs.
Facilities and geographic footprint
Foghorn Therapeutics has disclosed in SEC filings that it entered into a lease agreement for space in Watertown, Massachusetts, intended for principal executive offices and for research, development, manufacturing, and related uses. The company also entered into an agreement to terminate a prior lease in Cambridge, Massachusetts. These facility arrangements indicate a concentration of Foghorn’s operations in the Massachusetts biotechnology cluster.
Corporate governance and management changes
In its Form 8-K filings, Foghorn has reported changes in its finance leadership. One filing notes that its Chief Financial Officer notified the company of a decision to resign to pursue other opportunities, with no disagreement reported regarding operations, policies, or practices. A subsequent filing records the appointment of an interim Chief Financial Officer and Treasurer provided through a consulting arrangement with Danforth Advisors, LLC. These disclosures illustrate the company’s use of experienced external financial leadership while it conducts a search for a permanent CFO.
Position within biopharmaceutical and manufacturing classifications
Foghorn is classified under pharmaceutical preparation manufacturing within the broader manufacturing sector. Its activities, as described in public communications, align with a clinical-stage biotechnology model focused on research and development rather than large-scale commercial manufacturing. The company’s emphasis on chromatin regulation, protein degradation, and genetically defined cancer subsets places it within a specialized segment of oncology drug discovery and development.