Who Owns ARCHIMEDES TECH SPAC PTNRS I (ARCIW)? -- Institutional Holders (2026-06-30)
45 institutions reported holding $3.6M of ARCHIMEDES TECH SPAC PTNRS I (ARCIW) in SEC 13F filings for 2026-06-30. Largest institutional holders: BOOTHBAY FUND MANAGEMENT, LLC ($250,250), Centiva Capital, LP ($243,329), Magnetar Financial LLC ($225,000), Linden Advisors LP ($187,649), Alberta Investment Management Corp ($187,500). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | BOOTHBAY FUND MANAGEMENT, LLC | $250,250 | 25,000 | New |
| 2 | Centiva Capital, LP | $243,329 | 324,439 | New |
| 3 | Magnetar Financial LLC | $225,000 | 300,000 | Hold |
| 4 | Linden Advisors LP | $187,649 | 299,999 | Hold |
| 5 | Alberta Investment Management Corp | $187,500 | 250,000 | New |
| 6 | TENOR CAPITAL MANAGEMENT Co., L.P. | $187,500 | 250,000 | Hold |
| 7 | MILLENNIUM MANAGEMENT LLC | $178,125 | 237,500 | Added |
| 8 | Governors Lane LP | $156,375 | 250,000 | Hold |
| 9 | K2 PRINCIPAL FUND, L.P. | $154,418 | 308,837 | Added |
| 10 | SONA ASSET MANAGEMENT (US) LLC | $150,000 | 200,000 | Hold |
| 11 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $150,000 | 200,000 | Trimmed |
| 12 | AQR Arbitrage LLC | $142,052 | 189,403 | New |
| 13 | Verition Fund Management LLC | $140,400 | 187,200 | Trimmed |
| 14 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $103,125 | 137,500 | Hold |
| 15 | Polar Asset Management Partners Inc. | $96,975 | 129,300 | Added |
| 16 | MOORE CAPITAL MANAGEMENT, LP | $93,750 | 125,000 | Hold |
| 17 | Shaolin Capital Management LLC | $86,040 | 114,720 | Added |
| 18 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $81,250 | 125,000 | New |
| 19 | D. E. Shaw & Co., Inc. | $79,688 | 106,250 | Hold |
| 20 | BNP PARIBAS FINANCIAL MARKETS | $76,995 | 123,093 | New |
| 21 | Periscope Capital Inc. | $63,238 | 101,100 | Hold |
| 22 | COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $62,550 | 100,000 | New |
| 23 | MMCAP International Inc. SPC | $56,250 | 75,000 | New |
| 24 | Radcliffe Capital Management, L.P. | $50,906 | 81,385 | Added |
| 25 | HBK INVESTMENTS L P | $46,876 | 62,501 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30