PEN Penumbra, Inc.

NYSE
$317.73

Penumbra, Inc. (PEN) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+0.00
20 buyers / 20 sellers
MIXED
Funds compared
42
funds with comparable PEN positions
39 current holders · 39 prior-quarter holders
Net share change
+1.32M
+2.34M added, -1.02M cut
Position activity
3 new 17 increased 17 reduced 3 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
TIG Advisors Event Increased +155.0K +258.0% $48.9M 4.3% 73
ExodusPoint Capital Management Long/Short Quant Increased +625.2K +134.4% $197.4M 3.2% 70
Braidwell Growth Healthcare Sold Out -105.4K -100.0% $33.3M 0.0% 67
HBK Investments Event Increased +204.2K +12.5% $64.5M 7.5% 61
Point72 Asset Management, L.P. New +6.6K — $2.1M 0.0% 61
TWO SIGMA INVESTMENTS, LP Quant Increased +369.9K +635.4% $116.8M 0.1% 59
CITADEL ADVISORS LLC Quant Increased +246.0K +121.4% $77.7M 0.1% 58
Whitebox Advisors Event Value Increased +61.9K +13.9% $19.5M 8.5% 58
RENAISSANCE TECHNOLOGIES LLC Quant Increased +77.3K +3580.6% $24.4M 0.0% 56
Weiss Asset Management Event Quant New +4.3K — $1.4M 0.0% 56

Most significant buyers

By move score, not size.

  • TIG Advisors Increased · +155.0K
  • ExodusPoint Capital Management Increased · +625.2K
  • HBK Investments Increased · +204.2K
  • Point72 Asset Management, L.P. New · +6.6K
  • TWO SIGMA INVESTMENTS, LP Increased · +369.9K

Most significant sellers

By move score, not size.

  • Braidwell Sold Out · -105.4K
  • Moore Capital Management Sold Out · -25.0K
  • Bridgewater Associates Reduced · -8.5K
  • Aquatic Capital Management Sold Out · -26.0K
  • MILLENNIUM MANAGEMENT LLC Reduced · -397.5K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
TIG Advisors 3 215.1K 60.1K +155.0K +258.0% 4.3% Increased 73
ExodusPoint Capital Management 3 1.1M 465.2K +625.2K +134.4% 3.2% Increased 70
Braidwell 2 0 105.4K -105.4K -100.0% 0.0% Sold Out 67
HBK Investments 1 1.8M 1.6M +204.2K +12.5% 7.5% Increased 61
Point72 Asset Management, L.P. 1 6.6K 0 +6.6K — 0.0% New 61
TWO SIGMA INVESTMENTS, LP 2 428.1K 58.2K +369.9K +635.4% 0.1% Increased 59
CITADEL ADVISORS LLC 1 448.8K 202.7K +246.0K +121.4% 0.1% Increased 58
Whitebox Advisors 2 506.9K 445.0K +61.9K +13.9% 8.5% Increased 58
RENAISSANCE TECHNOLOGIES LLC 1 79.5K 2.2K +77.3K +3580.6% 0.0% Increased 56
Weiss Asset Management 2 4.3K 0 +4.3K — 0.0% New 56
Moore Capital Management 3 0 25.0K -25.0K -100.0% 0.0% Sold Out 56
MARSHALL WACE, LLP 2 90.5K 36.3K +54.2K +149.5% 0.0% Increased 54
Verition Fund Management 2 142.3K 68.0K +74.3K +109.3% 0.4% Increased 54
Bridgewater Associates 1 1.6K 10.0K -8.5K -84.3% 0.0% Reduced 53
Graham Capital Management 3 5.3K 0 +5.3K — 0.1% New 52
Aquatic Capital Management 4 0 26.0K -26.0K -100.0% 0.0% Sold Out 51
Gotham Asset Management, LLC 2 32.1K 8.9K +23.2K +261.8% 0.0% Increased 51
Balyasny Asset Management L.P. 2 1.1M 762.1K +328.1K +43.0% 0.7% Increased 48
Schonfeld Strategic Advisors 3 19.7K 918 +18.8K +2045.4% 0.0% Increased 47
MILLENNIUM MANAGEMENT LLC 2 700.6K 1.1M -397.5K -36.2% 0.2% Reduced 45
Engineers Gate 4 15.0K 917 +14.1K +1536.1% 0.1% Increased 44
Boothbay Fund Management 4 2.0K 19.3K -17.4K -89.9% 0.0% Reduced 43
Hudson Bay Capital Management 3 203.1K 349.0K -145.9K -41.8% 0.4% Reduced 41
LMR Partners 3 213.9K 295.7K -81.8K -27.7% 0.8% Reduced 40
AQR Capital Management 3 31.8K 77.4K -45.6K -58.9% 0.0% Reduced 38
Woodline Partners LP 2 145.8K 241.6K -95.8K -39.6% 0.1% Reduced 38
Quantbot Technologies 4 2.0K 10.8K -8.8K -81.5% 0.0% Reduced 37
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 176.7K 135.0K +41.7K +30.9% 0.1% Increased 37
Rock Springs Capital Management 3 115.8K 120.5K -4.8K -3.9% 1.8% Reduced 37
Capula Management 2 83.0K 101.8K -18.8K -18.5% 0.4% Reduced 34
Lighthouse Investment Partners 3 14.6K 23.4K -8.8K -37.6% 0.1% Reduced 33
Caxton Associates 3 179.4K 184.7K -5.3K -2.9% 1.1% Reduced 32
Magnetar Capital 2 255.8K 251.4K +4.4K +1.8% 1.0% Increased 31
Holocene Advisors, LP 2 128.0K 110.6K +17.4K +15.7% 0.1% Increased 31
D. E. Shaw & Co., Inc. 1 197.3K 202.0K -4.6K -2.3% 0.0% Reduced 30
Tudor Investment Corporation 2 400.6K 411.1K -10.5K -2.5% 0.6% Reduced 29
Squarepoint Ops LLC 2 138.4K 147.8K -9.4K -6.4% 0.1% Reduced 28
Polar Asset Management Partners 3 6.1K 7.0K -888 -12.7% 0.1% Reduced 26
Man Group 3 80.2K 74.7K +5.6K +7.4% 0.0% Increased 25
Centiva Capital 4 15.0K 15.0K -26 -0.2% 0.2% Reduced 19
Empyrean Capital Partners 2 85.0K 85.0K 0 +0.0% 1.1% Unchanged 24
Sculptor Capital Management 2 57.0K 57.0K 0 +0.0% 0.3% Unchanged 23

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.