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Magnetar Financial’s SiriusXM SIRI Stock Holding History

Magnetar Financial’s Portfolio SIRI Stock Details SIRI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2014
Q2 		– Sell
-1,000,600
Closed -$32M – 231
2014
Q1 		$32M Buy
+1,000,600
New +$35.4M 0.63% 48

Other funds holding SIRI

Berkshire Hathaway
Berkshire Hathaway Omaha, Nebraska $263B AUM 16.68% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
KCMH
Kontiki Capital Management (HK) Hong Kong $1.43B AUM 9.81% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 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

Magnetar Financial's SIRI Position: Q1 2026 in Review

Magnetar Financial opened a new position in SiriusXM (SIRI) in Q1 2026: 55,062 shares worth $1.27M. The stake represents 0.01% of the portfolio and ranks #419 among its holdings. This is a return to the name: Magnetar Financial previously reported a position in SIRI as recently as Q3 2018.

Magnetar Financial first reported a position in SIRI in Q1 2014 and has held it in 10 quarters since. The position peaked at $63.4M in Q1 2014. 559 funds tracked by Wall St. Rank hold SIRI as of Q1 2026.

  • Magnetar Financial held 55,062 shares of SiriusXM worth $1.27M as of Q1 2026.
  • SiriusXM was a new Magnetar Financial position in Q1 2026.
  • SiriusXM made up 0.01% of Magnetar Financial's portfolio in Q1 2026, its #419 holding.
  • Magnetar Financial first reported a position in SiriusXM in Q1 2014 and has held it in 10 quarters since.
  • Magnetar Financial's SiriusXM position peaked at $63.4M in Q1 2014.
  • 559 funds tracked by Wall St. Rank held SiriusXM as of Q1 2026.

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