OLMA Stock Soars 47% in September So Far on Second PFE Deal

Core Insights - Olema Pharmaceuticals (OLMA) shares have increased by 46.5% in September following a collaboration agreement with Pfizer (PFE) for its lead product candidate, palazestrant [1][6] - The collaboration involves a phase Ib/II study to evaluate the safety and potential combinability of palazestrant with Pfizer's atirmociclib in patients with ER+/HER2- metastatic breast cancer (MBC) [2][6] - Year-to-date, OLMA stock has risen by 37.2%, outperforming the industry growth of 4% [3] Collaboration Details - The phase Ib/II study is expected to enroll approximately 35 patients, with initiation anticipated by the end of 2025 [3] - Pfizer will supply atirmociclib for the study, while Olema will lead the study and retain exclusive global commercial rights to palazestrant [4][6] - This marks Olema's second partnership with Pfizer, the first being established in 2020 [7] Pipeline Development - Olema is also conducting a pivotal phase III OPERA-01 study for palazestrant as a monotherapy in second/third-line ER+/HER2- MBC, with top-line data expected in the second half of 2026 [8] - In partnership with Novartis (NVS), Olema is evaluating palazestrant in combination with Kisqali (ribociclib) in an ongoing phase Ib/II study, with a pivotal phase III OPERA-02 study planned [9][10] - Olema is exploring palazestrant in combination with a PI3Ka inhibitor and an mTOR inhibitor in separate phase I/II studies [11] Additional Investigational Candidates - Olema has a second investigational candidate, OP-3136, currently in a phase I study for advanced solid tumors, with initial results anticipated in 2026 [12][13] - The global market opportunity for OP-3136 in second/third-line ER+/HER2- MBC is estimated at around $5 billion [13]