MF
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Magnetar Financial’s Flex FLEX Stock Holding History

Magnetar Financial’s Portfolio FLEX Stock Details FLEX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-25,119
Closed -$1.52M – 1235
2025
Q4 		$1.52M Buy
+25,119
New +$1.55M 0.01% 384
2024
Q4 		– Sell
-38,104
Closed -$1.27M – 675
2024
Q3 		$1.27M Buy
+38,104
New +$1.17M 0.03% 266
2024
Q2 		– Sell
-49,245
Closed -$1.41M – 540
2024
Q1 		$1.41M Sell
49,245
-101,509
-67% -$2.66M 0.03% 229
2023
Q4 		$3.46M Buy
150,754
+129,295
+603% +$2.59M 0.09% 153
2023
Q3 		$436K Buy
+21,459
New +$435K 0.01% 350
2023
Q2 		– Sell
-47,264
Closed -$820K – 539
2023
Q1 		$820K Buy
+47,264
New +$818K 0.02% 410
2018
Q2 		– Sell
-259,391
Closed -$3.19M – 568
2018
Q1 		$3.19M Buy
259,391
+206,806
+393% +$2.82M 0.06% 72
2017
Q4 		$713K Buy
52,585
+15,724
+43% +$213K 0.01% 302
2017
Q3 		$460K Sell
36,861
-102,994
-74% -$1.27M 0.01% 447
2017
Q2 		$1.72M Buy
+139,855
New +$1.73M 0.03% 259

Other funds holding FLEX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Magnetar Financial's FLEX Position: Q1 2026 in Review

Magnetar Financial sold out of Flex (FLEX) in Q1 2026, closing a stake of 25,119 shares — an estimated $1.52M sold.

Magnetar Financial first reported a position in FLEX in Q2 2017 and held it in 10 quarters. The position peaked at $3.46M in Q4 2023. 789 funds tracked by Wall St. Rank hold FLEX as of Q1 2026.

  • Magnetar Financial reported no remaining Flex position as of Q1 2026 after selling out during the quarter.
  • Magnetar Financial sold 25,119 Flex shares in Q1 2026, an estimated $1.52M.
  • Magnetar Financial first reported a position in Flex in Q2 2017 and held it in 10 quarters.
  • Magnetar Financial's Flex position peaked at $3.46M in Q4 2023.
  • 789 funds tracked by Wall St. Rank held Flex as of Q1 2026.

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