MF
ARCI

Magnetar Financial’s Archimedes Tech SPAC Partners III ARCI Stock Holding History

Magnetar Financial’s Portfolio ARCI Stock Details ARCI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$12M Hold
1,200,000
– – 0.11% 133
2026
Q1 		$11.8M Buy
+1,200,000
New +$11.8M 0.12% 116

Other funds holding ARCI

Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
LA
Linden Advisors New York $19.3B AUM 1.47% 1-Year Est. Return
GL
Governors Lane New York $1.2B AUM 26.21% 1-Year Est. Return
AIMCA
Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $17.9B AUM 27.56% 1-Year Est. Return
TCM
Tenor Capital Management New York $7.09B AUM 3.55% 1-Year Est. Return
Verition Fund Management
Verition Fund Management Greenwich, Connecticut $19.7B AUM 39.39% 1-Year Est. Return
SAMU
SONA Asset Management (US) New York $4.76B AUM 23.76% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 1-Year Est. Return
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $71.2B AUM 48.86% 1-Year Est. Return
SCM
Shaolin Capital Management Miami, Florida $2.1B AUM 64.05% 1-Year Est. Return

Magnetar Financial's ARCI Position: Q2 2026 in Review

Magnetar Financial held its Archimedes Tech SPAC Partners III (ARCI) position steady in Q2 2026 at 1,200,000 shares worth $12M. The position accounts for 0.11% of the portfolio, ranked #133.

Magnetar Financial first reported a position in ARCI in Q1 2026 and has held it in 2 quarters since. 52 funds tracked by Wall St. Rank hold ARCI as of Q2 2026.

  • Magnetar Financial held 1,200,000 shares of Archimedes Tech SPAC Partners III worth $12M as of Q2 2026.
  • Magnetar Financial left its Archimedes Tech SPAC Partners III share count unchanged in Q2 2026.
  • Archimedes Tech SPAC Partners III made up 0.11% of Magnetar Financial's portfolio in Q2 2026, its #133 holding.
  • Magnetar Financial first reported a position in Archimedes Tech SPAC Partners III in Q1 2026 and has held it in 2 quarters since.
  • 52 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners III as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.