Pulmatrix, Inc. (PULM) Institutional Ownership

Ownership Summary

Pulmatrix, Inc. (NASDAQ:PULM) has 15 institutional investors with active 13F positions as of December 2025.

• Their combined ownership stood at 9.8% of outstanding shares in December 2025, up from 9.5% in September 2025.
• Their total shares held in PULM increased 3.19% from the prior quarter, while the number of investors in Pulmatrix increased 25.0% year over year.
• Of these 15 holders, 5 added to their stakes in Pulmatrix, 5 trimmed positions, and 5 made no changes.
• Altogether, these fund groups held 356.69K shares in PULM by December 2025, up by 11.02K shares quarter on quarter, and up 32.3K shares year over year.
• RENAISSANCE TECHNOLOGIES LLC leads ownership in PULM with 110.92K shares as of December 31, 2025, equal to 3.04% of outstanding shares.
• Leading buyers of Pulmatrix shares for the quarter ending December 2025 were DRW Securities, LLC (20.5K), Bank Of America Corp /De/ (1.3K), FLAGSHIP HARBOR ADVISORS, LLC (80), NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO (7), Royal Bank Of Canada (6).
• The biggest sellers of Pulmatrix for the quarter ending December 2025 included SBI Securities Co., Ltd. (4.1K), RENAISSANCE TECHNOLOGIES LLC (3.47K), VANGUARD GROUP INC (2.33K), Tower Research Capital LLC (TRC) (523), DIMENSIONAL FUND ADVISORS LP (454).
• Per Business Quant, the top 10 investors in PULM for the quarter ending December 2025 include RENAISSANCE TECHNOLOGIES LLC (110.92K), BlackRock, Inc. (55.34K), SBI Securities Co., Ltd. (55.24K), VANGUARD GROUP INC (47.08K), GEODE CAPITAL MANAGEMENT, LLC (40.94K), DRW Securities, LLC (20.5K), State Street Corp (13.94K), DIMENSIONAL FUND ADVISORS LP (10.33K), Bank Of America Corp /De/ (1.36K), Tower Research Capital LLC (TRC) (913).