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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
Daiwa Securities Group
226
Daiwa Securities Group
Japan
$1.12M -$5.24K -61 -0.4%
BCA
227
Bay Colony Advisors
Massachusetts
$1.11M +$1.16M +13,534 New
HSBC Holdings
228
HSBC Holdings
United Kingdom
$1.11M +$1.17M +13,633 New
CAM
229
Cresset Asset Management
Illinois
$1.11M +$546K +6,355 +90%
SG Americas Securities
230
SG Americas Securities
New York
$1.08M +$1.13M +13,125 New
Mariner
231
Mariner
Kansas
$1.08M +$863K +10,041 +328%
MIFH
232
Migdal Insurance & Financial Holdings
Israel
$1.07M – – –
X
233
Xponance
Pennsylvania
$1.05M +$236K +2,742 +27%
PI
234
PineBridge Investments
New York
$1.03M +$1.08M +12,564 New
PCM
235
Prelude Capital Management
New York
$1.03M +$270K +3,136 +33%
GAM
236
Groupama Asset Management
France
$1.02M – – –
RS
237
Rakuten Securities
Japan
$1M +$172K +2,001 +20%
LAI
238
Legal Advantage Investments
California
$989K +$251K +2,925 +32%
DTL
239
Dynamic Technology Lab
Singapore
$983K -$295K -3,427 -22%
SCA
240
Snowden Capital Advisors
New York
$971K +$371K +4,316 +58%
GCM
241
Graham Capital Management
Connecticut
$971K -$5.65M -65,702 -85%
Mirae Asset Global Investments
242
Mirae Asset Global Investments
South Korea
$946K +$340K +3,958 +52%
PCM
243
Pentwater Capital Management
Florida
$946K +$989K +11,500 New
DT
244
Diversified Trust
Tennessee
$920K +$961K +11,181 New
WAP
245
Wealthcare Advisory Partners
Pennsylvania
$919K -$23.5K -273 -2%
EAM
246
Eventide Asset Management
Massachusetts
$917K +$200K +2,324 +26%
CBA
247
Coastal Bridge Advisors
Connecticut
$910K +$509K +5,921 +115%
FIA
248
FNY Investment Advisers
New York
$904K +$355K +4,134 +60%
Cetera Investment Advisers
249
Cetera Investment Advisers
Illinois
$888K +$567K +6,595 +157%
EMAM
250
Encompass More Asset Management
California
$882K +$922K +10,720 New
8 9
10
11 12

RBRK Hedge Fund Activity: Q3 2025 in Review

436 of the 7,620 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.