MF
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Magnetar Financial’s Roblox RBLX Stock Holding History

Magnetar Financial’s Portfolio RBLX Stock Details RBLX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-8,324
Closed -$674K – 1352
2025
Q4 		$674K Sell
8,324
-12,619
-60% -$1.34M 0.01% 501
2025
Q3 		$2.9M Buy
20,943
+18,760
+859% +$2.33M 0.02% 312
2025
Q2 		$230K Buy
+2,183
New +$171K ﹤0.01% 768
2023
Q3 		– Sell
-10,259
Closed -$413K – 553
2023
Q2 		$413K Buy
+10,259
New +$412K 0.01% 369
2022
Q3 		– Sell
-19,613
Closed -$644K – 1481
2022
Q2 		$644K Buy
+19,613
New +$659K 0.01% 1083
2021
Q4 		– Sell
-6,000
Closed -$453K – 1520
2021
Q3 		$453K Buy
6,000
+2,928
+95% +$240K ﹤0.01% 919
2021
Q2 		$276K Sell
3,072
-16,928
-85% -$1.36M ﹤0.01% 1046
2021
Q1 		$1.3M Buy
+20,000
New +$1.39M 0.01% 646

Other funds holding RBLX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
IC
IEQ Capital Foster City, California $21.7B AUM 77.3% 1-Year Est. Return

Magnetar Financial's RBLX Position: Q1 2026 in Review

Magnetar Financial sold out of Roblox (RBLX) in Q1 2026, closing a stake of 8,324 shares — an estimated $674K sold.

Magnetar Financial first reported a position in RBLX in Q1 2021 and held it in 8 quarters. The position peaked at $2.9M in Q3 2025. 835 funds tracked by Wall St. Rank hold RBLX as of Q1 2026.

  • Magnetar Financial reported no remaining Roblox position as of Q1 2026 after selling out during the quarter.
  • Magnetar Financial sold 8,324 Roblox shares in Q1 2026, an estimated $674K.
  • Magnetar Financial first reported a position in Roblox in Q1 2021 and held it in 8 quarters.
  • Magnetar Financial's Roblox position peaked at $2.9M in Q3 2025.
  • 835 funds tracked by Wall St. Rank held Roblox as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.