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Pulmatrix
PULM

15 hedge funds and large institutions have $795K invested in Pulmatrix in 2025 Q4 according to their latest regulatory filings, with 3 funds opening new positions, 1 increasing their positions, 6 reducing their positions, and 2 closing their positions.

New
Increased
Maintained
Reduced
Closed

50% more first-time investments, than exits

New positions opened: 3 | Existing positions closed: 2

7% more funds holding

Funds holding: 14 → 15 (+1)

0.3% more ownership

Funds ownership: 9.47% → 9.77% (+0.3%)

53% less capital invested

Capital invested by funds: $1.68M → $795K (-$886K)

83% less repeat investments, than reductions

Existing positions increased: 1 | Existing positions reduced: 6

Holders
15
Holders Change
+1
Holders Change %
+7.14%
% of All Funds
0.18%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
3
Increased
1
Reduced
6
Closed
2
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
DS
DRW Securities
Illinois
+$89.2K
2
Bank of America
Bank of America
North Carolina
+$5.79K
3
FHA
Flagship Harbor Advisors
Massachusetts
+$348
4
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
+$26

Top Sellers

Rank Fund Capital Flow
1
SS
SBI Securities
Japan
-$17.8K
2
Renaissance Technologies
Renaissance Technologies
New York
-$15.1K
3
Vanguard Group
Vanguard Group
Pennsylvania
-$10.1K
4
TRCT
Tower Research Capital (TRC)
New York
-$2.27K
5
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$1.97K
Name Holding Trade Value Shares
Change 		Change in
Stake
Renaissance Technologies
1
Renaissance Technologies
New York
$247K -$15.1K -3,470 -3%
BlackRock
2
BlackRock
New York
$123K – – –
SS
3
SBI Securities
Japan
$123K -$17.8K -4,100 -7%
Vanguard Group
4
Vanguard Group
Pennsylvania
$105K -$10.1K -2,327 -5%
Geode Capital Management
5
Geode Capital Management
Massachusetts
$91.3K – – –
DS
6
DRW Securities
Illinois
$45.7K +$89.2K +20,505 New
State Street
7
State Street
Massachusetts
$31.1K – – –
Dimensional Fund Advisors
8
Dimensional Fund Advisors
Texas
$23K -$1.97K -454 -4%
Bank of America
9
Bank of America
North Carolina
$3.04K +$5.79K +1,332 +4,036%
TRCT
10
Tower Research Capital (TRC)
New York
$2.04K -$2.27K -523 -36%
FHA
11
Flagship Harbor Advisors
Massachusetts
$178 +$348 +80 New
FFA
12
Farther Finance Advisors
California
$16 – – –
AF
13
Allworth Financial
California
$7 – – –
Northwestern Mutual Wealth Management
14
Northwestern Mutual Wealth Management
Wisconsin
$2 -$26 -6 -86%
UBS Group
15
UBS Group
Switzerland
– -$627 -129 Closed
Barclays
16
Barclays
United Kingdom
– -$15 -3 Closed
Royal Bank of Canada
17
Royal Bank of Canada
Ontario, Canada
– +$26 +6 New

PULM Hedge Fund Activity: Q4 2025 in Review

15 of the 8,232 institutional investors tracked by Wall St. Rank reported a position in Pulmatrix (PULM) for Q4 2025, worth a combined $795K — down 53% from $1.68M a quarter earlier.

Buyers outnumbered sellers: 3 funds opened new PULM positions and 2 closed out — a net gain of 1 holder — while 1 added to existing stakes and 6 trimmed.

The largest buyer was DRW Securities, opening a new position worth an estimated $89.2K. The largest seller was SBI Securities, cutting an estimated $17.8K.

  • 15 institutional investors held Pulmatrix (PULM) as of Q4 2025, up from 14 in Q3 2025.
  • Funds reported $795K of Pulmatrix stock for Q4 2025, down 53% quarter-over-quarter.
  • 3 funds opened new Pulmatrix positions in Q4 2025 and 2 closed out, a net change of +1 holder.
  • The largest Pulmatrix buyer in Q4 2025 was DRW Securities, an estimated $89.2K added.
  • The largest Pulmatrix seller in Q4 2025 was SBI Securities, an estimated $17.8K sold.

Based on aggregated 13F filings for Q4 2025.