Penumbra
485 hedge funds and large institutions have $11.1B invested in Penumbra in 2026 Q1 according to their latest regulatory filings, with 132 funds opening new positions, 150 increasing their positions, 140 reducing their positions, and 81 closing their positions.
300% more funds holding in top 10
Funds holding in top 10: 6 → 24 (+18)
63% more first-time investments, than exits
New positions opened: 132 | Existing positions closed: 81
10% more funds holding
Funds holding: 439 → 485 (+46)
7% more repeat investments, than reductions
Existing positions increased: 150 | Existing positions reduced: 140
3% less capital invested
Capital invested by funds: $11.4B → $11.1B (-$327M)
7.69% less ownership
Funds ownership: 93.94% → 86.25% (-7.7%)
42% less call options, than puts
Call options by funds: $68.9M | Put options by funds: $118M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HI
HBK Investments
Dallas,
Texas
|
+$553M |
| 2 |
Balyasny Asset Management
Chicago,
Illinois
|
+$203M |
| 3 |
Citigroup
New York
|
+$194M |
| 4 |
WA
Whitebox Advisors
Minneapolis,
Minnesota
|
+$151M |
| 5 |
ECM
ExodusPoint Capital Management
New York
|
+$150M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$1.57B |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$543M |
| 3 |
RI
RTW Investments
New York
|
-$269M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$267M |
| 5 |
ClearBridge Investments
New York
|
-$201M |
PEN Hedge Fund Activity: Q1 2026 in Review
485 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Penumbra (PEN) for Q1 2026, worth a combined $11.1B — down 2.9% from $11.4B a quarter earlier.
Buyers outnumbered sellers: 132 funds opened new PEN positions and 81 closed out — a net gain of 51 holders — while 150 added to existing stakes and 140 trimmed.
The largest buyer was HBK Investments, opening a new position worth an estimated $553M. The largest seller was Fidelity Investments, cutting an estimated $1.57B.
- 485 institutional investors held Penumbra (PEN) as of Q1 2026, up from 439 in Q4 2025.
- Funds reported $11.1B of Penumbra stock for Q1 2026, down 2.9% quarter-over-quarter.
- 132 funds opened new Penumbra positions in Q1 2026 and 81 closed out, a net change of +51 holders.
- The largest Penumbra buyer in Q1 2026 was HBK Investments, an estimated $553M added.
- The largest Penumbra seller in Q1 2026 was Fidelity Investments, an estimated $1.57B sold.
Based on aggregated 13F filings for Q1 2026.