Citadel Advisors
ATII

Citadel Advisors’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

Citadel Advisors’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 		$2.7M Buy
250,266
+239,889
+2,312% +$2.61M ﹤0.01% 5886
2026
Q1 		$108K Buy
+10,377
New +$109K ﹤0.01% 11934

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
MF
Magnetar Financial Evanston, Illinois $11B AUM 3.37% 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

Citadel Advisors's ATII Position: Q2 2026 in Review

Citadel Advisors increased its Archimedes Tech SPAC Partners II Co (ATII) stake by 2,312% in Q2 2026, buying an estimated $2.61M and bringing the position to 250,266 shares worth $2.7M. The position accounts for ﹤0.01% of the portfolio, ranked #5886.

Citadel Advisors first reported a position in ATII in Q1 2026 and has held it in 2 quarters since. 50 funds tracked by Wall St. Rank hold ATII as of Q2 2026.

  • Citadel Advisors held 250,266 shares of Archimedes Tech SPAC Partners II Co worth $2.7M as of Q2 2026.
  • Citadel Advisors bought 239,889 Archimedes Tech SPAC Partners II Co shares in Q2 2026, an estimated $2.61M.
  • Archimedes Tech SPAC Partners II Co made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #5886 holding.
  • Citadel Advisors first reported a position in Archimedes Tech SPAC Partners II Co in Q1 2026 and has held it in 2 quarters since.
  • 50 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.