JO
ATII

John Overdeck’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

John Overdeck’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 		$7.82M Hold
725,000
– – 0.01% 1719
2026
Q1 		$7.55M Hold
725,000
– – 0.01% 1638
2025
Q4 		$7.51M Hold
725,000
– – 0.01% 1338
2025
Q3 		$7.4M Hold
725,000
– – 0.01% 1156
2025
Q2 		$7.42M Buy
+725,000
New +$7.31M 0.01% 1003

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
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

John Overdeck's ATII Position: Q2 2026 in Review

John Overdeck held its Archimedes Tech SPAC Partners II Co (ATII) position steady in Q2 2026 at 725,000 shares worth $7.82M. The position accounts for 0.01% of the portfolio, ranked #1719.

John Overdeck 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.

  • John Overdeck held 725,000 shares of Archimedes Tech SPAC Partners II Co worth $7.82M as of Q2 2026.
  • John Overdeck left its Archimedes Tech SPAC Partners II Co share count unchanged in Q2 2026.
  • Archimedes Tech SPAC Partners II Co made up 0.01% of John Overdeck's portfolio in Q2 2026, its #1719 holding.
  • John Overdeck 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 Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.