MF
OSG

Magnetar Financial’s Octave Specialty Group OSG Stock Holding History

Magnetar Financial’s Portfolio OSG Stock Details OSG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-27,188
Closed -$238K – 883
2025
Q1 		$238K Buy
+27,188
New +$286K ﹤0.01% 624
2024
Q4 		– Sell
-24,403
Closed -$274K – 604
2024
Q3 		$274K Buy
+24,403
New +$285K 0.01% 418
2019
Q2 		– Sell
-12,715
Closed -$230K – 441
2019
Q1 		$230K Buy
+12,715
New +$243K 0.01% 360

Other funds holding OSG

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
CGIC
Continental General Insurance Company Austin, Texas $693M AUM 90.58% 1-Year Est. Return
GJL
Gendell Jeffrey L $7.34B AUM 183.72% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
BCC
Bain Capital Credit Boston, Massachusetts $303M AUM 15.47% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Magnetar Financial's OSG Position: Q2 2025 in Review

Magnetar Financial sold out of Octave Specialty Group (OSG) in Q2 2025, closing a stake of 27,188 shares — an estimated $238K sold.

Magnetar Financial first reported a position in OSG in Q1 2019 and held it in 3 quarters. The position peaked at $274K in Q3 2024. 146 funds tracked by Wall St. Rank hold OSG as of Q2 2025.

  • Magnetar Financial reported no remaining Octave Specialty Group position as of Q2 2025 after selling out during the quarter.
  • Magnetar Financial sold 27,188 Octave Specialty Group shares in Q2 2025, an estimated $238K.
  • Magnetar Financial first reported a position in Octave Specialty Group in Q1 2019 and held it in 3 quarters.
  • Magnetar Financial's Octave Specialty Group position peaked at $274K in Q3 2024.
  • 146 funds tracked by Wall St. Rank held Octave Specialty Group as of Q2 2025.

Based on Magnetar Financial's 13F filing for Q2 2025, filed 12 Aug 2025.