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Rubrik, Inc.

RBRK
Exchange
NYSE
Industry
Services-Prepackaged Software
SEC CIK
0001943896

In the last 90 days, Rubrik, Inc. insiders filed 0 open-market purchases and 13 sales; 575 institutions reported holding it in 13F filings for Q2 2026, worth $10.4B in total; ARK Invest is the only superinvestor holding it.

Holders of 5% or more of RBRK

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Rubrik, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of RBRK
HolderLatest formStakeChangeFirst filedLatest filingFiling
Nithrakashyap Arvind13G11.50%11.3M sharesNewFeb 14, 20251 filingFeb 14, 2025SEC
Sinha Bipul13D/A8.90%13.8M shares−1.00 ppfrom 9.90%Feb 14, 20253 filingsSep 12, 2025SEC
AQR Capital Management LLC13G6.18%9.95M sharesNewAug 13, 20261 filingAug 13, 2026SEC
FMR LLC13G5.30%8.40M sharesNewMay 6, 20261 filingMay 6, 2026SEC
BlackRock, Inc.13G5.30%8.27M sharesNewApr 27, 20261 filingApr 27, 2026SEC
Vanguard Portfolio Management LLC13G5.12%8.06M sharesNewApr 29, 20261 filingApr 29, 2026SEC
Vanguard Capital Management LLC13G5.04%8.13M sharesNewJul 31, 20261 filingJul 31, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

28 Schedule 13D and 13G filings on Rubrik, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on RBRK
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 14, 20264:36 PM ETLightspeed Venture Partners IX, L.P.and 9 others13G/A2.00%3.30M shares−0.80 ppfrom 2.80%Below 5%Jun 30, 2026SEC
Aug 13, 202611:17 AM ETAQR Capital Management LLCand 1 other13G6.18%9.95M sharesNewJun 30, 2026SEC
Jul 31, 202610:43 AM ETVanguard Capital Management LLC13G5.04%8.13M sharesNewJun 30, 2026SEC
May 6, 202611:35 AM ETFMR LLCand 1 other13G5.30%8.40M sharesNewMar 31, 2026SEC
Apr 29, 20263:13 PM ETVanguard Portfolio Management LLC13G5.12%8.06M sharesNewMar 31, 2026SEC
Apr 27, 20264:12 PM ETBlackRock, Inc.13G5.30%8.27M sharesNewMar 31, 2026SEC
Mar 27, 202612:59 PM ETVanguard Group Inc13G/A0.00%0 shares−9.16 ppfrom 9.16%Below 5%Mar 13, 2026SEC
Feb 17, 20267:01 PM ETLightspeed Venture Partners IX, L.P.and 13 others13G/A2.80%4.40M shares−6.30 ppfrom 9.10%Below 5%Dec 31, 2025SEC
Oct 30, 20253:48 PM ETVanguard Group Inc13G/A9.16%13.0M shares−1.17 ppfrom 10.33%Sep 30, 2025SEC
Sep 12, 20257:18 PM ETSinha Bipul13D/A8.90%13.8M shares−1.00 ppfrom 9.90%Sep 12, 2025SEC
Sep 8, 202511:06 AM ETVanguard Group Inc13G/A10.33%12.8M shares+0.61 ppfrom 9.72%Aug 29, 2025SEC
Aug 14, 20254:50 PM ETLightspeed Venture Partners IX, L.P.and 16 others13G/A9.10%13.4M shares−9.00 ppfrom 18.10%Jun 30, 2025SEC
Aug 14, 20254:14 PM ETGreylock XIV Limited Partnershipand 3 others13G/A3.87%4.97M shares−5.12 ppfrom 8.99%Below 5%Jun 30, 2025SEC
Jul 29, 20252:32 PM ETVanguard Group Inc13G/A9.72%12.0M shares+2.46 ppfrom 7.26%Jun 30, 2025SEC
May 15, 20254:37 PM ETLightspeed Venture Partners IX, L.P.and 17 others13G/A18.10%22.8M shares–Mar 31, 2025SEC
May 7, 20255:00 PM ETGreylock XIV Limited Partnershipand 3 others13G/A8.99%9.95M shares−5.64 ppfrom 14.63%Mar 31, 2025SEC
Apr 1, 20258:30 PM ETSinha Bipul13D9.90%13.4M shares−3.30 ppfrom 13.20%Mar 25, 2025SEC
Feb 14, 20254:44 PM ETNithrakashyap Arvind13G11.50%11.3M sharesNewDec 31, 2024SEC
Feb 14, 20254:43 PM ETSinha Bipul13G13.20%13.2M sharesNewDec 31, 2024SEC
Feb 14, 20254:15 PM ETKhosla Ventures V, L.P.and 5 others13G/A2.20%1.96M shares–Below 5%Dec 31, 2024SEC
Feb 13, 20253:47 PM ETGreylock XIV Limited Partnershipand 3 others13G/A14.63%14.9M shares−7.72 ppfrom 22.35%Dec 31, 2024SEC
Feb 12, 20259:23 AM ETNorges Bank13G/A4.90%4.24M shares–Below 5%Dec 31, 2024SEC
Jan 31, 20259:56 AM ETVanguard Group Inc13G7.26%6.33M sharesNewDec 31, 2024SEC
Dec 19, 20246:39 PM ETGreylock XIV Limited Partnershipand 3 others13G22.35%19.9M sharesNewSep 30, 2024SEC
Nov 14, 2024Khosla Ventures V, L.P.13GOld format–New–SEC
Nov 14, 2024Lightspeed Venture Partners IX, L.P.13GOld format–New–SEC
Oct 15, 2024Norges Bank13GOld format–New–SEC
May 8, 2024Millennium Management LLC13GOld format–New–SEC

Form 144: proposed insider sales

1 notice from officers, directors and other affiliates planning to sell Rubrik, Inc. shares, newest first.

Form 144 notices for RBRK
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Sep 25, 20267:19 PM ETBipul SinhaOfficer500.0K$56.9MSep 25, 2026Goldman Sachs & Co. LLCSEC