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