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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
PCM
26
Penserra Capital Management
California
$76.6M -$452K -5,262 -0.6%
SPPAM
27
Summit Partners Public Asset Management
Massachusetts
$74.7M -$7.36M -85,626 -9%
Millennium Management
28
Millennium Management
New York
$72.5M -$1.88M -21,908 -2%
Susquehanna International Group
29
Susquehanna International Group
Pennsylvania
$70.5M +$68M +790,617 +1,189%
Renaissance Technologies
30
Renaissance Technologies
New York
$66.4M -$35.3M -410,300 -34%
UBS AM
31
UBS AM
Illinois
$64.5M -$8.99M -104,540 -12%
AllianceBernstein
32
AllianceBernstein
Tennessee
$63.6M +$18.1M +210,109 +37%
Assenagon Asset Management
33
Assenagon Asset Management
Luxembourg
$62.4M +$17M +198,133 +35%
AM
34
Atreides Management
Massachusetts
$61.9M +$24.2M +281,472 +60%
IC
35
IEQ Capital
California
$61.5M +$43.7M +507,879 +211%
Mirae Asset Global ETFs Holdings
36
Mirae Asset Global ETFs Holdings
Hong Kong
$58M +$1.13M +13,101 +2%
Alkeon Capital Management
37
Alkeon Capital Management
New York
$57.6M – – –
Squarepoint
38
Squarepoint
New York
$55M +$27.6M +321,440 +93%
Northern Trust
39
Northern Trust
Illinois
$52.3M +$7.95M +92,460 +17%
Man Group
40
Man Group
United Kingdom
$52.2M -$19.8M -230,591 -27%
BNP Paribas Financial Markets
41
BNP Paribas Financial Markets
France
$48.8M -$58.7M -682,360 -53%
EQF
42
Evergreen Quality Fund
Cayman Islands
$48.7M +$50.9M +592,300 New
Neuberger Berman Group
43
Neuberger Berman Group
New York
$48.5M +$47.8M +555,900 +1,669%
BC
44
BIT Capital
Germany
$48M +$48.4M +563,140 +2,705%
Acadian Asset Management
45
Acadian Asset Management
Massachusetts
$45.7M -$85.9M -998,877 -64%
Macquarie Group
46
Macquarie Group
Australia
$45.4M +$3.56M +41,467 +8%
Lord, Abbett & Co
47
Lord, Abbett & Co
New Jersey
$44M -$12M -139,232 -21%
Holocene Advisors
48
Holocene Advisors
New York
$43.2M – – –
Bank of New York Mellon
49
Bank of New York Mellon
New York
$42.6M +$157K +1,826 +0.4%
DCM
50
Driehaus Capital Management
Illinois
$42M +$6.37M +74,147 +17%
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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.