RBRK Rubrik, Inc.

NYSE
$100.20

Rubrik, Inc. (RBRK) 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
-30.00
14 buyers / 26 sellers
STRONG SELLING
Funds compared
41
funds with comparable RBRK positions
28 current holders · 34 prior-quarter holders
Net share change
+77.2K
+8.23M added, -8.15M cut
Position activity
7 new 7 increased 13 reduced 13 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
PointState Capital Macro Reduced -1.79M -49.1% $143.7M 2.6% 69
Atreides Management Long/Short Growth Sold Out -566.5K -100.0% $45.5M 0.0% 68
Alkeon Capital Management Growth Tech Sold Out -500.0K -100.0% $40.1M 0.0% 66
CITADEL ADVISORS LLC Quant Sold Out -731.2K -100.0% $58.7M 0.0% 64
Bridgewater Associates Quant Macro Sold Out -35.7K -100.0% $2.9M 0.0% 63
Junto Capital Management Long/Short Sold Out -294.5K -100.0% $23.6M 0.0% 63
Qube Research & Technologies Ltd Quant Sold Out -733.4K -100.0% $58.9M 0.0% 61
AQR Capital Management Long/Short Quant Increased +7.73M +348.7% $620.6M 0.3% 58
Discovery Capital Management Long/Short Macro New +33.2K — $2.7M 0.1% 56
Verition Fund Management Event Long/Short Sold Out -70.0K -100.0% $5.6M 0.0% 56

Most significant buyers

By move score, not size.

  • AQR Capital Management Increased · +7.73M
  • Discovery Capital Management New · +33.2K
  • Point72 Asset Management, L.P. Increased · +32.3K
  • LMR Partners New · +21.4K
  • Capstone Investment Advisors New · +6.1K

Most significant sellers

By move score, not size.

  • PointState Capital Reduced · -1.79M
  • Atreides Management Sold Out · -566.5K
  • Alkeon Capital Management Sold Out · -500.0K
  • CITADEL ADVISORS LLC Sold Out · -731.2K
  • Bridgewater Associates Sold Out · -35.7K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
PointState Capital 2 1.9M 3.6M -1.79M -49.1% 2.6% Reduced 69
Atreides Management 1 0 566.5K -566.5K -100.0% 0.0% Sold Out 68
Alkeon Capital Management 1 0 500.0K -500.0K -100.0% 0.0% Sold Out 66
CITADEL ADVISORS LLC 1 0 731.2K -731.2K -100.0% 0.0% Sold Out 64
Bridgewater Associates 1 0 35.7K -35.7K -100.0% 0.0% Sold Out 63
Junto Capital Management 2 0 294.5K -294.5K -100.0% 0.0% Sold Out 63
Qube Research & Technologies Ltd 2 0 733.4K -733.4K -100.0% 0.0% Sold Out 61
AQR Capital Management 3 9.9M 2.2M +7.73M +348.7% 0.3% Increased 58
Discovery Capital Management 2 33.2K 0 +33.2K — 0.1% New 56
Verition Fund Management 2 0 70.0K -70.0K -100.0% 0.0% Sold Out 56
Trexquant Investment 3 0 443.7K -443.7K -100.0% 0.0% Sold Out 55
Point72 Asset Management, L.P. 1 52.9K 20.7K +32.3K +156.1% 0.0% Increased 55
LMR Partners 3 21.4K 0 +21.4K — 0.0% New 55
ADAR1 Capital Management 3 0 4.9K -4.9K -100.0% 0.0% Sold Out 53
TWO SIGMA INVESTMENTS, LP 2 561.0K 2.3M -1.75M -75.7% 0.0% Reduced 53
Schonfeld Strategic Advisors 3 0 26.6K -26.6K -100.0% 0.0% Sold Out 53
Capstone Investment Advisors 3 6.1K 0 +6.1K — 0.0% New 53
Readystate Asset Management 3 0 22.8K -22.8K -100.0% 0.0% Sold Out 52
MARSHALL WACE, LLP 2 42.0K 363.0K -321.0K -88.4% 0.0% Reduced 51
Alphadyne Asset Management 3 2.8K 0 +2.8K — 0.0% New 51
Y-Intercept 4 46.8K 0 +46.8K — 0.1% New 51
Winton Group 4 0 31.2K -31.2K -100.0% 0.0% Sold Out 51
Walleye Capital 3 248.6K 88.9K +159.7K +179.6% 0.2% Increased 50
Parallax Volatility Advisers 3 1.8K 0 +1.8K — 0.0% New 50
Gotham Asset Management, LLC 2 107.8K 55.2K +52.5K +95.1% 0.0% Increased 49
Graham Capital Management 3 0 4.7K -4.7K -100.0% 0.0% Sold Out 49
Aquatic Capital Management 4 390 0 +390 — 0.0% New 48
MILLENNIUM MANAGEMENT LLC 2 131.1K 399.7K -268.6K -67.2% 0.0% Reduced 47
Voleon Capital Management 3 107.3K 331.0K -223.7K -67.6% 0.2% Reduced 43
RENAISSANCE TECHNOLOGIES LLC 1 509.2K 377.5K +131.7K +34.9% 0.1% Increased 40
WORLDQUANT MILLENNIUM ADVISORS LLC 2 8.7K 5.4K +3.3K +60.9% 0.0% Increased 40
Engineers Gate 4 7.6K 38.5K -30.9K -80.3% 0.0% Reduced 39
ExodusPoint Capital Management 3 87.2K 161.3K -74.2K -46.0% 0.1% Reduced 35
Squarepoint Ops LLC 2 647.3K 817.0K -169.7K -20.8% 0.1% Reduced 33
Quantbot Technologies 4 14.7K 32.9K -18.2K -55.4% 0.0% Reduced 30
Holocene Advisors, LP 2 525.0K 555.7K -30.7K -5.5% 0.1% Reduced 28
Brevan Howard Capital Management 3 10.9K 7.8K +3.0K +39.0% 0.0% Increased 28
D. E. Shaw & Co., Inc. 1 33.5K 33.7K -277 -0.8% 0.0% Reduced 27
Man Group 3 6.2K 7.2K -1.1K -14.6% 0.0% Reduced 25
Boothbay Fund Management 4 20.3K 23.1K -2.8K -12.1% 0.0% Reduced 21
Hudson Bay Capital Management 3 124.0K 124.0K 0 +0.0% 0.1% Unchanged 18

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.

Sign in or subscribe

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.