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Magnetar Financial’s Rambus RMBS Stock Holding History

Magnetar Financial’s Portfolio RMBS Stock Details RMBS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-36,439
Closed -$2.33M – 1141
2025
Q2 		$2.33M Buy
+36,439
New +$1.95M 0.01% 328
2025
Q1 		– Sell
-4,535
Closed -$240K – 908
2024
Q4 		$240K Sell
4,535
-5,042
-53% -$257K 0.01% 522
2024
Q3 		$404K Sell
9,577
-8,143
-46% -$395K 0.01% 366
2024
Q2 		$1.04M Sell
17,720
-3,135
-15% -$179K 0.02% 262
2024
Q1 		$1.29M Buy
+20,855
New +$1.32M 0.03% 235
2023
Q3 		– Sell
-3,294
Closed -$211K – 561
2023
Q2 		$211K Buy
+3,294
New +$181K ﹤0.01% 431
2022
Q3 		– Sell
-29,825
Closed -$641K – 1484
2022
Q2 		$641K Buy
+29,825
New +$738K 0.01% 1084
2018
Q4 		– Sell
-21,832
Closed -$238K – 466
2018
Q3 		$238K Buy
+21,832
New +$266K ﹤0.01% 400
2018
Q2 		– Sell
-11,712
Closed -$157K – 662
2018
Q1 		$157K Sell
11,712
-955
-8% -$12.8K ﹤0.01% 538
2017
Q4 		$180K Buy
12,667
+1,833
+17% +$26.4K ﹤0.01% 643
2017
Q3 		$145K Buy
+10,834
New +$139K ﹤0.01% 675
2015
Q4 		– Sell
-34,724
Closed -$410K – 456
2015
Q3 		$410K Buy
34,724
+4,585
+15% +$59.6K 0.01% 267
2015
Q2 		$437K Buy
+30,139
New +$431K 0.01% 305

Other funds holding RMBS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return

Magnetar Financial's RMBS Position: Q3 2025 in Review

Magnetar Financial sold out of Rambus (RMBS) in Q3 2025, closing a stake of 36,439 shares — an estimated $2.33M sold.

Magnetar Financial first reported a position in RMBS in Q2 2015 and held it in 13 quarters. The position peaked at $2.33M in Q2 2025. 513 funds tracked by Wall St. Rank hold RMBS as of Q3 2025.

  • Magnetar Financial reported no remaining Rambus position as of Q3 2025 after selling out during the quarter.
  • Magnetar Financial sold 36,439 Rambus shares in Q3 2025, an estimated $2.33M.
  • Magnetar Financial first reported a position in Rambus in Q2 2015 and held it in 13 quarters.
  • Magnetar Financial's Rambus position peaked at $2.33M in Q2 2025.
  • 513 funds tracked by Wall St. Rank held Rambus as of Q3 2025.

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