Pulmatrix, Inc. (PULM) Institutional Ownership

Ownership Summary

Pulmatrix, Inc. (NASDAQ:PULM) appears in 15 institutional 13F filings for the quarter ending December 2025.

• These investors collectively held 9.8% of Pulmatrix's outstanding shares in December 2025, up from 9.5% in September 2025.
• They increased total shares held in PULM by 3.19% quarter over quarter, and investors in Pulmatrix increased 25.0% from a year ago.
• Of these 15 funds, 5 grew their exposure to Pulmatrix, 5 cut back, and 5 maintained positions.
• Institutional investors collectively held 356.69K shares in Pulmatrix as of December 2025, up by 11.02K shares quarter on quarter, and up 32.3K shares year over year.
• RENAISSANCE TECHNOLOGIES LLC holds the largest position in PULM at 110.92K shares as of December 31, 2025, or 3.04% of shares outstanding.
• The largest buyers of Pulmatrix 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).
• Leading sellers of Pulmatrix shares for the quarter ending December 2025 were 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).
• According to Business Quant data, leading holders of PULM for December 2025 are 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).