ATII — Archimedes Tech Spac Partner Institutional Holders · Q2 2026

Name: Who Owns ATII? 67 Institutions Hold $190M (Q2 2026)
Creator: ko.io

Who owns Archimedes Tech Spac Partner (ATII)? 67 institutions reported holding $189.79M in SEC 13F filings for Q2 2026 (period ended 2026-06-30). Largest holders: TENOR CAPITAL MANAGEMENT Co., L.P. ($14.7M), Fort Baker Capital Management LP ($14.3M), Magnetar Financial LLC ($14.0M).

Rank	Institution	Value	Shares	Change
1	TENOR CAPITAL MANAGEMENT Co., L.P.	$14.7M	1.4M	Trimmed
2	Fort Baker Capital Management LP	$14.3M	1.3M	New
3	Magnetar Financial LLC	$14.0M	1.3M	Trimmed
4	D. E. Shaw & Co., Inc.	$12.3M	1.1M	Hold
5	Decagon Asset Management LLP	$10.1M	937,829	New
6	Linden Advisors LP	$9.1M	848,273	Trimmed
7	Ghisallo Capital Management LLC	$8.6M	800,000	Hold
8	TWO SIGMA INVESTMENTS, LP	$7.8M	725,000	Hold
9	Hudson Bay Capital Management LP	$7.5M	700,000	Hold
10	Shay Capital LLC	$6.7M	623,687	New
11	Governors Lane LP	$6.5M	604,857	Trimmed
12	AQR Arbitrage LLC	$6.4M	590,262	Trimmed
13	Sculptor Capital LP	$6.0M	552,619	Trimmed
14	K2 PRINCIPAL FUND, L.P.	$5.7M	526,227	Added
15	LMR Partners LLP	$5.2M	478,978	Trimmed
16	Radcliffe Capital Management, L.P.	$5.2M	478,061	Trimmed
17	MOORE CAPITAL MANAGEMENT, LP	$4.9M	450,000	Hold
18	Alberta Investment Management Corp	$4.3M	400,000	Trimmed
19	FNY Investment Advisers, LLC	$3.5M	327,200	New
20	Mint Tower Capital Management B.V.	$3.2M	300,000	Hold
21	CITADEL ADVISORS LLC	$2.7M	250,266	Added
22	WHITEBOX ADVISORS LLC	$2.7M	250,000	Hold
23	Harraden Circle Investments, LLC	$2.5M	234,661	New
24	GOLDMAN SACHS GROUP INC	$2.2M	205,090	Trimmed
25	ARISTEIA CAPITAL, L.L.C.	$2.2M	200,000	Trimmed

Source: SEC Form 13F filings · as of 2026-06-30