Welcome to our dedicated page for Cullinan Oncology SEC filings (Ticker: CGEM), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Cullinan Therapeutics, Inc. filings document formal disclosures for a clinical-stage biopharmaceutical company developing therapies for autoimmune diseases and cancer. Recent Form 8-K reports furnish operating results and financial-condition updates, Regulation FD materials, and clinical disclosures tied to programs including CLN-978, CLN-049 and zipalertinib.
The filing record also covers corporate and governance matters, including definitive proxy disclosures on executive and director compensation, equity awards and shareholder voting matters. Material-event filings document portfolio and contractual actions, including the termination of an exclusive patent license related to CLN-617 through Cullinan Amber Corp.
Citadel Advisors LLC and related Citadel entities, along with founder Kenneth Griffin, disclosed a new passive stake in Cullinan Therapeutics, Inc. (CGEM) via Schedule 13G. The group now beneficially owns 3,009,126 common shares, or 5.1% of CGEM’s 59,014,667 shares outstanding as of 30 July 2025. Citadel Advisors, Citadel Advisors Holdings LP and Citadel GP LLC jointly hold 2,511,191 shares (4.3%), while market-making affiliate Citadel Securities controls 497,935 shares (0.8%). All voting and dispositive power is reported as shared; none of the entities has sole power over the stock. The filing is made under Rule 13d-1(b)/(c), signalling the position is currently passive rather than activist. Kenneth Griffin is deemed a control person through his ownership of the various Citadel general-partner entities. No intent to influence control of the issuer is stated, and the certification confirms the shares were not acquired for activist purposes. The disclosure provides investors with the first confirmation that a high-profile hedge-fund complex has crossed the 5% threshold in CGEM.