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Magnetar Financial’s Rubrik RBRK Stock Holding History

Magnetar Financial’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
2025
Q3 		– Sell
-11,320
Closed -$1.01M – 1242
2025
Q2 		$1.01M Buy
11,320
+1,643
+17% +$130K ﹤0.01% 439
2025
Q1 		$590K Buy
9,677
+6,057
+167% +$413K 0.01% 429
2024
Q4 		$237K Buy
+3,620
New +$179K 0.01% 524

Other funds holding RBRK

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return
VOYA Investment Management
VOYA Investment Management Atlanta, Georgia $96.1B AUM 40.06% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $61.5B AUM 30.7% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Magnetar Financial's RBRK Position: Q3 2025 in Review

Magnetar Financial sold out of Rubrik (RBRK) in Q3 2025, closing a stake of 11,320 shares — an estimated $1.01M sold.

Magnetar Financial first reported a position in RBRK in Q4 2024 and held it in 3 quarters. The position peaked at $1.01M in Q2 2025. 436 funds tracked by Wall St. Rank hold RBRK as of Q3 2025.

  • Magnetar Financial reported no remaining Rubrik position as of Q3 2025 after selling out during the quarter.
  • Magnetar Financial sold 11,320 Rubrik shares in Q3 2025, an estimated $1.01M.
  • Magnetar Financial first reported a position in Rubrik in Q4 2024 and held it in 3 quarters.
  • Magnetar Financial's Rubrik position peaked at $1.01M in Q2 2025.
  • 436 funds tracked by Wall St. Rank held Rubrik as of Q3 2025.

Based on Magnetar Financial's 13F filing for Q3 2025, filed 13 Nov 2025.