WCMNY
ATII

Westchester Capital Management (New York)’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

Westchester Capital Management (New York)’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 		– Sell
-907,144
Closed -$9.44M – 352
2026
Q1 		$9.44M Hold
907,144
– – 0.43% 44
2025
Q4 		$9.4M Buy
907,144
+7,144
+0.8% +$74K 0.39% 53
2025
Q3 		$9.19M Buy
900,000
+250,000
+38% +$2.55M 0.42% 51
2025
Q2 		$6.65M Buy
+650,000
New +$6.55M 0.35% 59

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

Westchester Capital Management (New York)'s ATII Position: Q2 2026 in Review

Westchester Capital Management (New York) sold out of Archimedes Tech SPAC Partners II Co (ATII) in Q2 2026, closing a stake of 907,144 shares — an estimated $9.44M sold.

Westchester Capital Management (New York) first reported a position in ATII in Q2 2025 and held it in 4 quarters. The position peaked at $9.44M in Q1 2026. 49 funds tracked by Wall St. Rank hold ATII as of Q2 2026.

  • Westchester Capital Management (New York) reported no remaining Archimedes Tech SPAC Partners II Co position as of Q2 2026 after selling out during the quarter.
  • Westchester Capital Management (New York) sold 907,144 Archimedes Tech SPAC Partners II Co shares in Q2 2026, an estimated $9.44M.
  • Westchester Capital Management (New York) first reported a position in Archimedes Tech SPAC Partners II Co in Q2 2025 and held it in 4 quarters.
  • Westchester Capital Management (New York)'s Archimedes Tech SPAC Partners II Co position peaked at $9.44M in Q1 2026.
  • 49 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co as of Q2 2026.

Based on Westchester Capital Management (New York)'s 13F filing for Q2 2026, filed 14 Aug 2026.