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

Magnetar Financial’s Portfolio ATIIW Stock Details ATIIW Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$954K	Sell	437,600 -212,400	-33%	-$377K	0.01%	450
2026 Q1	$332K	Hold	650,000	–	–	﹤0.01%	742
2025 Q4	$357K	Hold	650,000	–	–	﹤0.01%	639
2025 Q3	$241K	Hold	650,000	–	–	﹤0.01%	736
2025 Q2	$251K	Buy	+650,000	New	+$201K	﹤0.01%	746

Other funds holding ATIIW

HCI

Harraden Circle Investments New York $784M AUM 20.59% 1-Year Est. Return

Aristeia Capital Greenwich, Connecticut $7.69B AUM 15.48% 1-Year Est. Return

TCM

Tenor Capital Management New York $7.09B AUM 3.55% 1-Year Est. Return

LMR Partners London, United Kingdom $26.8B AUM 68.38% 1-Year Est. Return

Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $71.2B AUM 48.86% 1-Year Est. Return

Linden Advisors New York $19.3B AUM 1.47% 1-Year Est. Return

AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 1-Year Est. Return

AIMCA

Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $17.9B AUM 27.56% 1-Year Est. Return

DAM

Decagon Asset Management London, United Kingdom $525M AUM 50.51% 1-Year Est. Return

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Magnetar Financial's ATIIW Position: Q2 2026 in Review

Magnetar Financial reduced its Archimedes Tech SPAC Partners II Co Warrant (ATIIW) stake by 33% in Q2 2026, selling an estimated $377K and leaving 437,600 shares worth $954K. The position accounts for 0.01% of the portfolio, ranked #450.

Magnetar Financial first reported a position in ATIIW in Q2 2025 and has held it in 5 quarters since. 32 funds tracked by Wall St. Rank hold ATIIW as of Q2 2026.

Magnetar Financial held 437,600 shares of Archimedes Tech SPAC Partners II Co Warrant worth $954K as of Q2 2026.
Magnetar Financial sold 212,400 Archimedes Tech SPAC Partners II Co Warrant shares in Q2 2026, an estimated $377K.
Archimedes Tech SPAC Partners II Co Warrant made up 0.01% of Magnetar Financial's portfolio in Q2 2026, its #450 holding.
Magnetar Financial first reported a position in Archimedes Tech SPAC Partners II Co Warrant in Q2 2025 and has held it in 5 quarters since.
32 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co Warrant as of Q2 2026.

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