Pulmatrix
PULM
15 hedge funds and large institutions have $569K invested in Pulmatrix in 2026 Q2 according to their latest regulatory filings, with 2 funds opening new positions, 3 increasing their positions, 3 reducing their positions, and 2 closing their positions.
34% more capital invested
Capital invested by funds: $425K → $569K (+$144K)
0.14% more ownership
Funds ownership: 9.02% → 9.16% (+0.14%)
0% more funds holding
Funds holding: 15 → 15 (0)
0% more first-time investments, than exits
New positions opened: 2 | Existing positions closed: 2
0% more repeat investments, than reductions
Existing positions increased: 3 | Existing positions reduced: 3
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SC
Shay Capital
New York
|
+$25.5K |
| 2 |
Renaissance Technologies
New York
|
+$18.3K |
| 3 |
SS
SBI Securities
Tokyo,
Japan
|
+$1.62K |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$666 |
| 5 |
Barclays
London,
United Kingdom
|
+$20 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
-$18.8K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
-$15.3K |
| 3 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$2.27K |
| 4 |
Vanguard Capital Management
Malvern,
Pennsylvania
|
-$1.76K |
| 5 |
TRCT
Tower Research Capital (TRC)
New York
|
-$267 |
PULM Hedge Fund Activity: Q2 2026 in Review
15 of the 8,323 institutional investors tracked by Wall St. Rank reported a position in Pulmatrix (PULM) for Q2 2026, worth a combined $569K — up 34% from $425K a quarter earlier.
Fund positioning in PULM was balanced in Q2 2026: 2 funds opened new positions, 2 closed out, 3 added to existing stakes and 3 trimmed.
The largest buyer was Shay Capital, opening a new position worth an estimated $25.5K. The largest seller was Jane Street, exiting entirely with an estimated $18.8K sold.
- 15 institutional investors held Pulmatrix (PULM) as of Q2 2026, unchanged from Q1 2026.
- Funds reported $569K of Pulmatrix stock for Q2 2026, up 34% quarter-over-quarter.
- 2 funds opened new Pulmatrix positions in Q2 2026 and 2 closed out, a net change of 0 holders.
- The largest Pulmatrix buyer in Q2 2026 was Shay Capital, an estimated $25.5K added.
- The largest Pulmatrix seller in Q2 2026 was Jane Street, an estimated $18.8K sold.
Based on aggregated 13F filings for Q2 2026.