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Penumbra

482 hedge funds and large institutions have $11.1B invested in Penumbra in 2026 Q1 according to their latest regulatory filings, with 131 funds opening new positions, 149 increasing their positions, 141 reducing their positions, and 79 closing their positions.

New
Increased
Maintained
Reduced
Closed

300% more funds holding in top 10

Funds holding in top 10: 624 (+18)

66% more first-time investments, than exits

New positions opened: 131 | Existing positions closed: 79

10% more funds holding

Funds holding: 438482 (+44)

6% more repeat investments, than reductions

Existing positions increased: 149 | Existing positions reduced: 141

3% less capital invested

Capital invested by funds: $11.4B → $11.1B (-$328M)

7.7% less ownership

Funds ownership: 93.95%86.25% (-7.7%)

42% less call options, than puts

Call options by funds: $68.9M | Put options by funds: $118M

Holders
482
Holders Change
+44
Holders Change %
+10.05%
% of All Funds
5.94%
Holding in Top 10
24
Holding in Top 10 Change
+18
Holding in Top 10 Change %
+300%
% of All Funds
0.3%
New
131
Increased
149
Reduced
141
Closed
79
Calls
$68.9M
Puts
$118M
Net Calls
-$49.3M
Net Calls Change
-$87.8M
Name Holding Trade Value Shares
Change
Change in
Stake
AAM
51
Alpine Associates Management
Florida
$43.3M +$44.7M +131,950 New
RSCM
52
Rock Springs Capital Management
Maryland
$39.6M
WIC
53
Water Island Capital
New York
$39.4M +$40.7M +120,095 New
N
54
Natixis
France
$38.2M +$39.4M +116,229 New
Holocene Advisors
55
Holocene Advisors
New York
$36.3M -$122M -360,734 -77%
RhumbLine Advisers
56
RhumbLine Advisers
Massachusetts
$36.2M +$1.02M +3,011 +3%
HSBC Holdings
57
HSBC Holdings
United Kingdom
$36.1M +$36.8M +108,646 +7,115%
B
58
Braidwell
Connecticut
$34.6M -$1.63M -4,800 -4%
SG Americas Securities
59
SG Americas Securities
New York
$33.5M +$30.8M +90,924 +818%
CM
60
Capula Management
Cayman Islands
$33.4M +$34.5M +101,779 New
SC
61
Slotnik Capital
Texas
$33.2M +$34.2M +101,000 New
N
62
Nuveen
North Carolina
$33.1M +$9.1M +26,864 +36%
ClearBridge Investments
63
ClearBridge Investments
New York
$31.9M -$201M -593,679 -86%
UBS AM
64
UBS AM
Illinois
$31.8M +$2.24M +6,605 +7%
BOA
65
Birnam Oak Advisors
New York
$31.5M +$32.5M +95,990 New
GCL
66
Glazer Capital LLC
New York
$31.1M +$32.1M +94,819 New
Principal Financial Group
67
Principal Financial Group
Iowa
$29M +$1.44M +4,263 +5%
SGCM
68
Sand Grove Capital Management
United Kingdom
$28.5M +$29.4M +86,758 New
BNP Paribas Financial Markets
69
BNP Paribas Financial Markets
France
$28.4M +$25.6M +75,664 +703%
ECP
70
Empyrean Capital Partners
California
$27.9M +$28.8M +85,000 New
MAM
71
Melqart Asset Management
United Kingdom
$26.9M +$27.7M +81,822 New
Allspring Global Investments
72
Allspring Global Investments
North Carolina
$26.3M -$94.4M -278,728 -78%
AIMCA
73
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$26.3M +$27.1M +80,000 New
PMAM
74
Picton Mahoney Asset Management
Ontario, Canada
$26.3M +$27.1M +80,000 New
AQR Capital Management
75
AQR Capital Management
Connecticut
$25.4M -$36.4M -107,577 -58%