Pulmatrix, Inc.
PULM- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001574235
No open-market purchases or sales by Pulmatrix, Inc. insiders were filed in the last 90 days; 15 institutions reported holding it in 13F filings for Q2 2026, worth $568.7K in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Pulmatrix, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 15
- +1 vs. Q4 2025
- Shares held
- 329.5K
- +19.9K (+6.4%) vs. Q4 2025
- Total value
- $425.1K
- −$265.3K (−38.4%) vs. Q4 2025
- New holders
- 5
- 2 more added
- Sold out
- 4
- 4 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PULM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 15 | $568.7K |
| Q1 2026 | 15 | $425.1K |
| Q4 2025 | 15 | $795.4K |
| Q3 2025 | 14 | $1.68M |
| Q2 2025 | 12 | $2.31M |
| Q1 2025 | 11 | $2.10M |
| Q4 2024 | 11 | $2.26M |
| Q3 2024 | 13 | $566.2K |
| Q2 2024 | 12 | $485.6K |
| Q1 2024 | 14 | $433.5K |
| Q4 2023 | 12 | $565.5K |
| Q3 2023 | 12 | $776.6K |
| Q2 2023 | 14 | $1.14M |
| Q1 2023 | 16 | $1.50M |
| Q4 2022 | 14 | $2.25M |
| Q3 2022 | 13 | $2.04M |
| Q2 2022 | 16 | $2.71M |
| Q1 2022 | 14 | $3.69M |
| Q4 2021 | 24 | $5.36M |
| Q3 2021 | 20 | $6.14M |
| Q2 2021 | 22 | $8.28M |
| Q1 2021 | 28 | $9.42M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Pulmatrix, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Renaissance Technologies LLC | 109,148 | $140.8K | 0.00% | −1,772−1.6% | Reduced |
| BlackRock, Inc. | 54,899 | $70.8K | 0.00% | −436−0.8% | Reduced |
| Geode Capital Management, LLC | 44,629 | $57.6K | 0.00% | +3,685+9.0% | Added |
| Vanguard Capital Management LLC | 33,594 | $43.3K | 0.00% | +33,594 | New |
| SBI Securities Co., Ltd. | 30,085 | $38.8K | 0.00% | −25,157−45.5% | Reduced |
| Vanguard Fiduciary Trust Co | 14,715 | $19.0K | 0.00% | +14,715 | New |
| Jane Street Group, LLC | 14,584 | $18.8K | 0.00% | +14,584 | New |
| State Street Corp | 13,945 | $18.0K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 13,669 | $17.6K | 0.00% | +13,669 | New |
| Tower Research Capital LLC (TRC) | 207 | $267 | 0.00% | −706−77.3% | Reduced |
| UBS Group AG | 23 | $30 | 0.00% | +23 | New |
| Farther Finance Advisors, LLC | 7 | $9 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 3 | $4 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 1 | $1 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 7 | $0 | 0.00% | +1+16.7% | Added |
| DRW Securities, LLC | 0 | $0 | 0.00% | −20,505−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −10,326−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −1,365−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −80−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |