PulmatrixPULM
13F holders, Q1 2026 (March 31)15holders
3new positions
4sold out
1famous investor
$1.29avg. 13F price*
At the end of Q1 2026, 15 institutions reported holding Pulmatrix Inc. (PULM) in their 13F filings, unchanged from Q4 2025. 3 opened new positions and 4 sold out. The largest holders were Renaissance Technologies ($141K), BlackRock, Inc. ($71K) and Geode Capital Management, LLC ($58K). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Pulmatrix Inc.
- CUSIP
- 74584P301
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $36K |
| Exits | 4 | $72K |
All 13F filers, Q4 2025 → Q1 2026: 31,962 shares bought and 60,347 shares sold, net −28,385 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 15 holders
| Renaissance Technologies | 0.00% | Reduce -1.6% | 109,148 | $141K |
| BlackRock, Inc. | 0.00% | Reduce -0.8% | 54,899 | $71K |
| Geode Capital Management, LLC | 0.00% | Add +9.0% | 44,629 | $58K |
| Vanguard Capital Management LLC | 0.00% | — | 33,594 | $43K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -45.5% | 30,085 | $39K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 14,715 | $19K |
| Jane Street Group, LLC | 0.00% | New | 14,584 | $19K |
| State Street Corp. | 0.00% | No change | 13,945 | $18K |
| XTX Topco Ltd | 0.00% | New | 13,669 | $18K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -77.3% | 207 | $267 |
| UBS Group AG | 0.00% | New | 23 | $30 |
| Farther Finance Advisors, LLC | 0.00% | No change | 7 | $9 |
| Allworth Financial LP | 0.00% | No change | 3 | $4 |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 1 | $1 |
| Royal Bank of Canada | 0.00% | Add +16.7% | 7 | $0 |
"% of holder's portfolio" is PULM's weight in each manager's 13F, not the share of Pulmatrix Inc. the manager owns.