Pulse Biosciences
PLSE
84 hedge funds and large institutions have $104M invested in Pulse Biosciences in 2025 Q3 according to their latest regulatory filings, with 10 funds opening new positions, 26 increasing their positions, 27 reducing their positions, and 12 closing their positions.
64% more call options, than puts
Call options by funds: $704K | Put options by funds: $428K
15% more capital invested
Capital invested by funds: $90.3M → $104M (+$13.2M)
0.21% less ownership
Funds ownership: 8.9% → 8.69% (-0.21%)
4% less repeat investments, than reductions
Existing positions increased: 26 | Existing positions reduced: 27
2% less funds holding
Funds holding: 86 → 84 (-2)
17% less first-time investments, than exits
New positions opened: 10 | Existing positions closed: 12
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$1.62M |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$423K |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$375K |
| 4 |
ECM
ExodusPoint Capital Management
New York
|
+$346K |
| 5 |
Bank of America
Charlotte,
North Carolina
|
+$339K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
-$1.74M |
| 2 |
Morgan Stanley
New York
|
-$919K |
| 3 |
BlackRock
New York
|
-$575K |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
-$474K |
| 5 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$466K |
PLSE Hedge Fund Activity: Q3 2025 in Review
84 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Pulse Biosciences (PLSE) for Q3 2025, worth a combined $104M — up 15% from $90.3M a quarter earlier.
Sellers outnumbered buyers: 12 funds closed out of PLSE and 10 opened new positions — a net loss of 2 holders — while 27 trimmed existing stakes and 26 added.
The largest buyer was Portolan Capital Management, opening a new position worth an estimated $1.62M. The largest seller was Vanguard Group, cutting an estimated $1.74M.
- 84 institutional investors held Pulse Biosciences (PLSE) as of Q3 2025, down from 86 in Q2 2025.
- Funds reported $104M of Pulse Biosciences stock for Q3 2025, up 15% quarter-over-quarter.
- 10 funds opened new Pulse Biosciences positions in Q3 2025 and 12 closed out, a net change of -2 holders.
- The largest Pulse Biosciences buyer in Q3 2025 was Portolan Capital Management, an estimated $1.62M added.
- The largest Pulse Biosciences seller in Q3 2025 was Vanguard Group, an estimated $1.74M sold.
Based on aggregated 13F filings for Q3 2025.