Who Owns ARCHIMEDES TECH SPAC PARTNER (ATIIW)? -- Institutional Holders (2026-06-30)

45 institutions reported holding $18.5M of ARCHIMEDES TECH SPAC PARTNER (ATIIW) in SEC 13F filings for 2026-06-30. Largest institutional holders: Harraden Circle Investments, LLC ($2.5M), ARISTEIA CAPITAL, L.L.C. ($1.7M), TENOR CAPITAL MANAGEMENT Co., L.P. ($1.6M), LMR Partners LLP ($1.3M), HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND ($1.1M). Source: SEC Form 13F.

Rank	Institution	Value	Shares	Change
1	Harraden Circle Investments, LLC	$2.5M	1.1M	Trimmed
2	ARISTEIA CAPITAL, L.L.C.	$1.7M	788,491	Added
3	TENOR CAPITAL MANAGEMENT Co., L.P.	$1.6M	750,000	Hold
4	LMR Partners LLP	$1.3M	613,701	Added
5	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	$1.1M	500,000	Hold
6	Linden Advisors LP	$1.1M	504,138	Trimmed
7	AQR Arbitrage LLC	$1.0M	481,366	Added
8	Magnetar Financial LLC	$953,968	437,600	Trimmed
9	Alberta Investment Management Corp	$821,213	375,000	Hold
10	Decagon Asset Management LLP	$725,519	331,302	New
11	D. E. Shaw & Co., Inc.	$626,750	287,500	Hold
12	K2 PRINCIPAL FUND, L.P.	$614,772	280,718	Added
13	MOORE CAPITAL MANAGEMENT, LP	$492,728	225,000	Hold
14	Shaolin Capital Management LLC	$397,773	181,640	Trimmed
15	MILLENNIUM MANAGEMENT LLC	$370,866	169,353	Trimmed
16	BNP PARIBAS FINANCIAL MARKETS	$354,604	161,927	Hold
17	CSS LLC/IL	$332,248	151,718	Trimmed
18	Sculptor Capital LP	$328,923	150,200	New
19	RIVERNORTH CAPITAL MANAGEMENT, LLC	$323,916	224,942	Hold
20	Mint Tower Capital Management B.V.	$285,000	130,000	Trimmed
21	WHITEBOX ADVISORS LLC	$273,738	125,000	Hold
22	Alpine Global Management, LLC	$155,568	71,039	New
23	DLD Asset Management, LP	$151,979	69,400	Trimmed
24	MMCAP International Inc. SPC	$136,869	62,500	Hold
25	Clear Street Group Inc.	$131,394	60,000	Trimmed

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