DOSSIER · 13F Holders · Q1 2026Technology · Services-Prepackaged Software
RBRK

RUBRIK INC.

520 institutions still hold RUBRIK INC. as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 781154109·Services-Prepackaged Software·520 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$3.8B
visible holders
Holders
520
filers reporting
Concentration
11.51%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

Rubrik's dollar ledger shows zero institutional selling this quarter, and the two biggest positive numbers belong to Congress Asset Management (+$16.6 million) and Assenagon (+$10.2 million). Both need correcting before reading. Congress, the anchor holder at $43.3 million, actually reduced its share count — the stock's sharp rally grew the position's value faster than the trim shrank it, so the raw ledger records a seller as the quarter's biggest 'buyer.' Assenagon is a quasi-passive options-overlay manager whose $22.5 million block is hedging inventory, not a data-security thesis. What remains is still a constructive quarter: Covea Finance initiated a genuine $6.1 million position, Gradient Investments and Stablepoint added seven and six figures respectively, and not one tracked holder reduced its dollar position — but the accurate headline is an anchor quietly taking chips off the table into strength while newer, smaller money arrives.

Congress Asset Management — Rubrik's largest tracked holder at $43.3 million, more than half the $83.1 million base's anchor weight — is recorded with a $16.6 million positive value change while being flagged as a share reducer. Both facts are true: the position's share count fell while the stock's steep quarterly climb grew its dollar value anyway. The economically accurate statement is that the anchor holder trimmed into strength. A reader scanning the buyer column would conclude the opposite.

Assenagon Asset Management's $10.2 million add to $22.5 million requires the other standard correction: the firm is classified quasi-passive, an options-overlay manager whose blocks swell and shrink with hedging mechanics across hundreds of names. Its RBRK stake carries no view about enterprise data security.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$432M8.8M0.01%Q1 2026
02
FMR LLC
CIK 0000315066
$405M8.3M0.02%Q1 2026
03
Vanguard Portfolio Management
CIK 0002100121· Index
$393M8.0M0.02%Q1 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$321M6.6M0.01%Q1 2026
05
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$240M4.9M0.17%Q1 2026
06
CITADEL ADVISORS LLC
CIK 0001423053
$208M2.7M0.03%Q4 2025
07
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$183M3.7M0.19%Q1 2026
08
PointState Capital LP
CIK 0001509842
$179M3.6M2.26%Q1 2026
09
Pictet Asset Management Holding SA
CIK 0001993888
$163M3.3M0.17%Q1 2026
10
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$145M3.0M0.02%Q1 2026
11
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$136M2.8M0.02%Q1 2026
12
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$132M2.7M0.01%Q1 2026
13
STATE STREET CORP
CIK 0000093751
$126M2.6M0.00%Q1 2026
14
D. E. Shaw & Co., Inc.
CIK 0001009207
$117M1.5M0.06%Q4 2025
15
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$114M2.3M0.09%Q1 2026
16
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$105M2.2M0.05%Q1 2026
17
UBS Group AG
CIK 0001610520
$96M2.0M0.01%Q1 2026
18
Legal & General Group Plc
CIK 0000764068
$89M1.8M0.02%Q1 2026
19
WELLS FARGO & COMPANY/MN
CIK 0000072971
$87M1.8M0.02%Q1 2026
20
MORGAN STANLEY
CIK 0000895421
$84M1.7M0.01%Q1 2026
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Insiders at RUBRIK INC.
Mhatre RaviNithrakashyap ArvindThompson John Wendell