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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
AO
251
Allen Operations
New York
$880K +$919K +10,694 New
PMAM
252
Penn Mutual Asset Management
Pennsylvania
$867K -$3.63M -42,176 -80%
Janney Montgomery Scott
253
Janney Montgomery Scott
Pennsylvania
$866K +$298K +3,468 +49%
Cambridge Investment Research Advisors
254
Cambridge Investment Research Advisors
Iowa
$856K +$678K +7,889 +314%
SPC
255
Sigma Planning Corp
Michigan
$838K +$198K +2,300 +29%
HFM
256
Harvest Fund Management
China
$830K +$860K +10,000 +10,000%
Pathstone Holdings
257
Pathstone Holdings
New Jersey
$828K +$73K +849 +9%
SS
258
SBI Securities
Japan
$825K +$394K +4,580 +84%
HIW
259
Holos Integrated Wealth
Pennsylvania
$823K +$860K +10,000 New
SG
260
StoneX Group
New York
$823K – – –
Public Employees Retirement Association of Colorado
261
Public Employees Retirement Association of Colorado
Colorado
$773K – – –
DIM
262
DC Investments Management
Virginia
$762K – – –
BCI
263
Brinker Capital Investments
Pennsylvania
$749K +$4.81K +56 +0.6%
KeyBank National Association
264
KeyBank National Association
Ohio
$748K – – –
Cohen & Steers
265
Cohen & Steers
New York
$740K +$172K +2,000 +29%
MCM
266
MAI Capital Management
Ohio
$738K +$99.9K +1,162 +15%
SFI
267
Susquehanna Fundamental Investments
Pennsylvania
$732K +$765K +8,900 New
LNWWM
268
Laird Norton Wetherby Wealth Management
California
$704K +$295K +3,430 +67%
CUAMC
269
China Universal Asset Management Company
China
$699K – – –
DWG
270
Darden Wealth Group
Michigan
$681K +$420K +4,882 +144%
AIM
271
Aigen Investment Management
New York
$669K +$699K +8,134 New
AWA
272
Arete Wealth Advisors
Illinois
$662K +$692K +8,054 New
Mercer Global Advisors
273
Mercer Global Advisors
Colorado
$660K +$690K +8,028 New
CCM
274
Cadian Capital Management
New York
$658K +$688K +8,000 New
AB
275
Amalgamated Bank
New York
$654K +$136K +1,577 +25%
9 10
11
12 13

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.