William Blair & Company
RBRK icon

William Blair & Company’s Rubrik RBRK Stock Holding History

William Blair & Company’s Portfolio RBRK Stock Details RBRK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$6.69M Buy
83,360
+52,695
+172% +$3.31M 0.02% 459
2026
Q1 		$1.5M Buy
30,665
+22,640
+282% +$1.3M ﹤0.01% 822
2025
Q4 		$614K Buy
+8,025
New +$616K ﹤0.01% 1070

Other funds holding RBRK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
VOYA Investment Management
VOYA Investment Management Atlanta, Georgia $116B AUM 61.47% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

William Blair & Company's RBRK Position: Q2 2026 in Review

William Blair & Company increased its Rubrik (RBRK) stake by 172% in Q2 2026, buying an estimated $3.31M and bringing the position to 83,360 shares worth $6.69M. The position accounts for 0.02% of the portfolio, ranked #459.

William Blair & Company first reported a position in RBRK in Q4 2025 and has held it in 3 quarters since. 575 funds tracked by Wall St. Rank hold RBRK as of Q2 2026.

  • William Blair & Company held 83,360 shares of Rubrik worth $6.69M as of Q2 2026.
  • William Blair & Company bought 52,695 Rubrik shares in Q2 2026, an estimated $3.31M.
  • Rubrik made up 0.02% of William Blair & Company's portfolio in Q2 2026, its #459 holding.
  • William Blair & Company first reported a position in Rubrik in Q4 2025 and has held it in 3 quarters since.
  • 575 funds tracked by Wall St. Rank held Rubrik as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.