MF
ATII

Magnetar Financial’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

Magnetar Financial’s Portfolio ATII Stock Details ATII Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$14M Sell
1,297,302
-2,698
-0.2% -$29.3K 0.13% 114
2026
Q1 		$13.6M Hold
1,300,000
– – 0.14% 100
2025
Q4 		$13.5M Hold
1,300,000
– – 0.13% 93
2025
Q3 		$13.3M Hold
1,300,000
– – 0.08% 95
2025
Q2 		$13.2M Buy
+1,300,000
New +$13.1M 0.06% 87

Other funds holding ATII

TCM
Tenor Capital Management New York $7.09B AUM 3.55% 1-Year Est. Return
FBCM
Fort Baker Capital Management Larkspur, California $1.37B AUM 26.91% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
DAM
Decagon Asset Management London, United Kingdom $525M AUM 50.51% 1-Year Est. Return
LA
Linden Advisors New York $19.3B AUM 1.47% 1-Year Est. Return
GCM
Ghisallo Capital Management Boston, Massachusetts $5.1B AUM 39.13% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Hudson Bay Capital Management
Hudson Bay Capital Management Stamford, Connecticut $36.8B AUM 42.13% 1-Year Est. Return
SC
Shay Capital New York $1.56B AUM 46.17% 1-Year Est. Return
GL
Governors Lane New York $1.2B AUM 26.21% 1-Year Est. Return

Magnetar Financial's ATII Position: Q2 2026 in Review

Magnetar Financial reduced its Archimedes Tech SPAC Partners II Co (ATII) stake by 0.21% in Q2 2026, selling an estimated $29.3K and leaving 1,297,302 shares worth $14M. The position accounts for 0.13% of the portfolio, ranked #114.

Magnetar Financial first reported a position in ATII in Q2 2025 and has held it in 5 quarters since. 49 funds tracked by Wall St. Rank hold ATII as of Q2 2026.

  • Magnetar Financial held 1,297,302 shares of Archimedes Tech SPAC Partners II Co worth $14M as of Q2 2026.
  • Magnetar Financial sold 2,698 Archimedes Tech SPAC Partners II Co shares in Q2 2026, an estimated $29.3K.
  • Archimedes Tech SPAC Partners II Co made up 0.13% of Magnetar Financial's portfolio in Q2 2026, its #114 holding.
  • Magnetar Financial first reported a position in Archimedes Tech SPAC Partners II Co in Q2 2025 and has held it in 5 quarters since.
  • 49 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co as of Q2 2026.

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