Pulmatrix
PULM
15 hedge funds and large institutions have $425K invested in Pulmatrix in 2026 Q1 according to their latest regulatory filings, with 5 funds opening new positions, 2 increasing their positions, 4 reducing their positions, and 4 closing their positions.
25% more first-time investments, than exits
New positions opened: 5 | Existing positions closed: 4
0% more funds holding
Funds holding: 15 → 15 (0)
0.74% less ownership
Funds ownership: 9.77% → 9.02% (-0.74%)
47% less capital invested
Capital invested by funds: $795K → $425K (-$370K)
50% less repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 4
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
+$34.6K |
| 2 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$32.4K |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
+$8.74K |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$55 |
| 5 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$2 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SS
SBI Securities
Tokyo,
Japan
|
-$59.7K |
| 2 |
DS
DRW Securities
Chicago,
Illinois
|
-$45.7K |
| 3 |
Dimensional Fund Advisors
Austin,
Texas
|
-$23K |
| 4 |
Renaissance Technologies
New York
|
-$4.2K |
| 5 |
Bank of America
Charlotte,
North Carolina
|
-$3.04K |
PULM Hedge Fund Activity: Q1 2026 in Review
15 of the 8,130 institutional investors tracked by Wall St. Rank reported a position in Pulmatrix (PULM) for Q1 2026, worth a combined $425K — down 47% from $795K a quarter earlier.
Buyers outnumbered sellers: 5 funds opened new PULM positions and 4 closed out — a net gain of 1 holder — while 2 added to existing stakes and 4 trimmed.
The largest buyer was Jane Street, opening a new position worth an estimated $34.6K. The largest seller was SBI Securities, cutting an estimated $59.7K.
- 15 institutional investors held Pulmatrix (PULM) as of Q1 2026, unchanged from Q4 2025.
- Funds reported $425K of Pulmatrix stock for Q1 2026, down 47% quarter-over-quarter.
- 5 funds opened new Pulmatrix positions in Q1 2026 and 4 closed out, a net change of +1 holder.
- The largest Pulmatrix buyer in Q1 2026 was Jane Street, an estimated $34.6K added.
- The largest Pulmatrix seller in Q1 2026 was SBI Securities, an estimated $59.7K sold.
Based on aggregated 13F filings for Q1 2026.