Rubrik, Inc. (RBRK) Institutional Ownership

Ownership Summary

The institutional landscape for Rubrik, Inc. (NYSE:RBRK) includes 430 filers as of the latest reporting cycle ending September 2025.

• The percentage of Rubrik owned by institutions changed from 52.6% in June 2025 to 54.6% in September 2025, marking a slight up trend.
• On a quarter-over-quarter basis, institutional holdings shifted by 10.34%, with a year-over-year an increase of 154.44% in the count of filers.
• Among the 430 institutional holders of Rubrik, 291 added to their stakes while 94 trimmed their positions and 45 held steady.
• This class of investors increased its holdings in Rubrik to 105.71Mn shares for the 13F-cycle ending September 2025, up by 9.90Mn shares quarter on quarter, and up 53.45Mn shares year over year.
• The top institutional stake in Rubrik as of September 30, 2025 belongs to VANGUARD GROUP INC, which owns 13.02Mn shares, or 6.73% of the company.
• Among the most significant buyers of Rubrik during September 2025 were BlackRock, Inc. (1.77Mn), CITADEL ADVISORS LLC (1.65Mn), Pictet Asset Management Holding SA (1.30Mn), JANE STREET GROUP, LLC (1.29Mn), FEDERATED HERMES, INC. (1.23Mn).
• Leading sellers of Rubrik stock in September 2025 included D. E. Shaw & Co., Inc. (3.23Mn), VOLORIDGE INVESTMENT MANAGEMENT, LLC (1.28Mn), TWO SIGMA INVESTMENTS, LP (1.08Mn), TEACHER RETIREMENT SYSTEM OF TEXAS (1.01Mn), ACADIAN ASSET MANAGEMENT LLC (998.88K).
• The top 10 institutional holders of Rubrik for the quarter ending September 2025 included VANGUARD GROUP INC (13.02Mn), BlackRock, Inc. (10.13Mn), FIRST TRUST ADVISORS LP (4.95Mn), VOYA INVESTMENT MANAGEMENT LLC (3.57Mn), CITADEL ADVISORS LLC (2.68Mn), FMR LLC (2.62Mn), FEDERATED HERMES, INC. (2.44Mn), GEODE CAPITAL MANAGEMENT, LLC (2.35Mn), STATE STREET CORP (2.08Mn), UBS Group AG (1.88Mn).