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Rubrik
RBRK

436 hedge funds and large institutions have $8.43B invested in Rubrik in 2025 Q3 according to their latest regulatory filings, with 132 funds opening new positions, 177 increasing their positions, 81 reducing their positions, and 81 closing their positions.

New
Increased
Maintained
Reduced
Closed

119% more repeat investments, than reductions

Existing positions increased: 177 | Existing positions reduced: 81

63% more first-time investments, than exits

New positions opened: 132 | Existing positions closed: 81

12% more funds holding

Funds holding: 389 → 436 (+47)

7% less call options, than puts

Call options by funds: $395M | Put options by funds: $426M

6% less capital invested

Capital invested by funds: $8.93B → $8.43B (-$500M)

63% less funds holding in top 10

Funds holding in top 10: 19 → 7 (-12)

70.45% less ownership

Funds ownership: 142.58% → 72.13% (-70%)

Holders
436
Holders Change
+47
Holders Change %
+12.08%
% of All Funds
5.72%
Holding in Top 10
7
Holding in Top 10 Change
-12
Holding in Top 10 Change %
-63.16%
% of All Funds
0.09%
New
132
Increased
177
Reduced
81
Closed
81
Calls
$395M
Puts
$426M
Net Calls
-$31.1M
Net Calls Change
+$7.42M

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$152M
2
PC
PointState Capital
New York
+$146M
3
Pictet Asset Management
Pictet Asset Management
Switzerland
+$112M
4
Federated Hermes
Federated Hermes
Pennsylvania
+$106M
5
AQR Capital Management
AQR Capital Management
Connecticut
+$102M

Top Sellers

Rank Fund Capital Flow
1
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$278M
2
Voloridge Investment Management
Voloridge Investment Management
Florida
-$110M
3
Two Sigma Investments
Two Sigma Investments
New York
-$92.5M
4
Teacher Retirement System of Texas
Teacher Retirement System of Texas
Texas
-$86.9M
5
Acadian Asset Management
Acadian Asset Management
Massachusetts
-$85.9M
Name Holding Trade Value Shares
Change 		Change in
Stake
CS
476
Cisco Systems
California
– -$887K -9,898 Closed
LMIM
477
Lockheed Martin Investment Management
Maryland
– -$887K -9,898 Closed
PCMH
478
Polymer Capital Management (HK)
Hong Kong
– -$828K -9,242 Closed
DS
479
DRW Securities
Illinois
– -$813K -9,073 Closed
PTC
480
Petrus Trust Company
Texas
– -$776K -8,666 Closed
CC
481
Centiva Capital
New York
– -$741K -8,269 Closed
LMGAM
482
Liberty Mutual Group Asset Management
Massachusetts
– -$739K -8,248 Closed
OAC
483
OMERS Administration Corp
Ontario, Canada
– -$708K -7,900 Closed
SB
484
Strategic Blueprint
Georgia
– -$612K -6,830 Closed
SW
485
SkyOak Wealth
Michigan
– -$605K -6,754 Closed
IIM
486
INTECH Investment Management
Florida
– -$603K -6,731 Closed
SFM
487
Soros Fund Management
New York
– -$598K -6,672 Closed
FTUS
488
Flow Traders U.S.
New York
– -$513K -5,723 Closed
GIA
489
Gladstone Institutional Advisory
Florida
– -$482K -5,376 Closed
AL
490
Aspiriant LLC
California
– -$411K -4,588 Closed
RIP
491
Reliant Investment Partners
North Carolina
– -$375K -4,190 Closed
CFM
492
Catalyst Funds Management
Australia
– -$350K -3,910 Closed
FWP
493
Firethorn Wealth Partners
Georgia
– -$346K -3,860 Closed
MCM
494
Moore Capital Management
New York
– -$334K -3,730 Closed
M1FG
495
Mach-1 Financial Group
Arkansas
– -$332K -3,707 Closed
ECM
496
Everence Capital Management
Indiana
– -$323K -3,610 Closed
ACA
497
Aptus Capital Advisors
Alabama
– -$308K -3,437 Closed
MWM
498
Meridian Wealth Management
Kentucky
– -$296K -3,305 Closed
OAM
499
Oxford Asset Management
United Kingdom
– -$267K -2,981 Closed
GCP
500
GSA Capital Partners
United Kingdom
– -$259K -2,896 Closed
17 18 19
20
21

RBRK Hedge Fund Activity: Q3 2025 in Review

436 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Rubrik (RBRK) for Q3 2025, worth a combined $8.43B — down 5.6% from $8.93B a quarter earlier.

Buyers outnumbered sellers: 132 funds opened new RBRK positions and 81 closed out — a net gain of 51 holders — while 177 added to existing stakes and 81 trimmed.

The largest buyer was BlackRock, adding an estimated $152M. The largest seller was D.E. Shaw & Co, cutting an estimated $278M.

  • 436 institutional investors held Rubrik (RBRK) as of Q3 2025, up from 389 in Q2 2025.
  • Funds reported $8.43B of Rubrik stock for Q3 2025, down 5.6% quarter-over-quarter.
  • 132 funds opened new Rubrik positions in Q3 2025 and 81 closed out, a net change of +51 holders.
  • The largest Rubrik buyer in Q3 2025 was BlackRock, an estimated $152M added.
  • The largest Rubrik seller in Q3 2025 was D.E. Shaw & Co, an estimated $278M sold.

Based on aggregated 13F filings for Q3 2025.