Clear Street’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

Clear Street’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 Q1	$806K	Buy	77,452 +73,257	+1,746%	+$770K	﹤0.01%	393
2025 Q4	$43.5K	Sell	4,195 -25,000	-86%	-$259K	﹤0.01%	639
2025 Q3	$298K	Sell	29,195 -8,339	-22%	-$85.2K	﹤0.01%	329
2025 Q2	$384K	Buy	+37,534	New	+$378K	﹤0.01%	179

Other funds holding ATII

TCM

Tenor Capital Management New York $6.49B AUM 3.01% 1-Year Est. Return

Magnetar Financial Evanston, Illinois $9.84B AUM 190.64% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Linden Advisors New York $17.9B AUM 1.72% 1-Year Est. Return

AQR Arbitrage Greenwich, Connecticut $6.09B AUM 27.01% 1-Year Est. Return

WCMNY

Westchester Capital Management (New York) Valhalla, New York $2.21B AUM 26.02% 1-Year Est. Return

LMR Partners London, United Kingdom $45.4B AUM 60.68% 1-Year Est. Return

GCM

Ghisallo Capital Management Boston, Massachusetts $3.63B AUM 30.51% 1-Year Est. Return

Governors Lane New York $1.56B AUM 30.42% 1-Year Est. Return

AIMCA

Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $16.7B AUM 23.27% 1-Year Est. Return

Clear Street's ATII Position: Q1 2026 in Review

Clear Street increased its Archimedes Tech SPAC Partners II Co (ATII) stake by 1,746% in Q1 2026, buying an estimated $770K and bringing the position to 77,452 shares worth $806K. The position accounts for ﹤0.01% of the portfolio, ranked #393.

Clear Street first reported a position in ATII in Q2 2025 and has held it in 4 quarters since. 54 funds tracked by Wall St. Rank hold ATII as of Q1 2026.

Clear Street held 77,452 shares of Archimedes Tech SPAC Partners II Co worth $806K as of Q1 2026.
Clear Street bought 73,257 Archimedes Tech SPAC Partners II Co shares in Q1 2026, an estimated $770K.
Archimedes Tech SPAC Partners II Co made up ﹤0.01% of Clear Street's portfolio in Q1 2026, its #393 holding.
Clear Street first reported a position in Archimedes Tech SPAC Partners II Co in Q2 2025 and has held it in 4 quarters since.
54 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co as of Q1 2026.

Based on Clear Street's 13F filing for Q1 2026, filed 15 May 2026.