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Trillium Therapeutics Inc. (TRIL.TO) was a clinical-stage immuno-oncology company focused on developing innovative therapies for the treatment of cancer. The company specialized in targeting the CD47-SIRPα pathway, a key immune checkpoint that cancer cells exploit to evade immune system detection. Its lead candidates, TTI-621 and TTI-622, were designed to block this pathway and enhance the body's ability to attack tumors. Trillium's approach positioned it in the competitive immuno-oncology space, with potential applications in hematologic malignancies and solid tumors. The company was acquired by Pfizer Inc. in September 2021, which significantly altered its independent strategic position.
Focus on CD47-SIRPα pathway inhibitors (TTI-621, TTI-622); clinical-stage assets
Trillium Therapeutics’ investment potential is now tied to Pfizer’s strategic priorities following its acquisition. While its CD47-targeting technology holds promise in immuno-oncology, the company no longer operates as an independent entity, limiting direct public market opportunities. Risks include clinical development hurdles and integration within a large pharma organization. Investors in Pfizer may indirectly benefit from Trillium’s pipeline contributions.
Pfizer press release (2021 acquisition), Trillium Therapeutics SEC filings (pre-acquisition), Bloomberg