Archimedes Tech-30ATIIWPreferred / convertible
13F holders, Q4 2025 (December 31)36holders +2
2new positions
0sold out
1famous investor
$0.68avg. 13F price*
At the end of Q4 2025, 36 institutions reported holding Archimedes Tech-30 (ATIIW) in their 13F filings, up 2 from Q3 2025. 2 opened new positions and 0 sold out. The largest holders were Mint Tower Capital Management B.V. ($1.6M), Harraden Circle Investments, LLC ($953K) and Linden Advisors LP ($460K). One famous investor held it David E. Shaw ( of D. E. Shaw & Co.'s portfolio).
- Company
- Archimedes Tech-30
- CUSIP
- G04537125
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $110K |
| Exits | 0 | $0 |
All 13F filers, Q3 2025 → Q4 2025: 730,295 shares bought and 286,700 shares sold, net +443,595 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 36 holders
| Mint Tower Capital Management B.V. | — | No change | 150,000 | $1.6M |
| Harraden Circle Investments, LLC | — | Add +3.0% | 1,734,715 | $953K |
| Linden Advisors LP | — | Add +47.1% | 860,962 | $460K |
| TENOR CAPITAL MANAGEMENT Co., L.P. | — | No change | 750,000 | $412K |
| Magnetar Financial LLC | — | No change | 650,000 | $357K |
| CSS LLC | — | Add +1.5% | 540,426 | $297K |
| Healthcare of Ontario Pension Plan Trust Fund | — | No change | 500,000 | $275K |
| Shaolin Capital Management LLC | — | Reduce -9.1% | 500,000 | $275K |
| AQR Arbitrage LLC | — | No change | 489,691 | $269K |
| LMR Partners LLP | — | No change | 425,000 | $233K |
| Driehaus Capital Management LLC | — | No change | 400,000 | $220K |
| Alberta Investment Management Corp | — | No change | 375,000 | $206K |
| D. E. Shaw & Co. | — | No change | 287,500 | $158K |
| K2 Principal Fund, L.P. | — | Reduce -7.7% | 239,895 | $132K |
| Moore Capital Management, LP | — | No change | 225,000 | $124K |
| Rivernorth Capital Management, LLC | — | Add +25.8% | 224,942 | $124K |
| Westchester Capital Management, LLC | — | No change | 199,999 | $110K |
| DLD Asset Management, LP | — | New | 341,901 | $109K |
| Periscope Capital Inc. | — | No change | 198,600 | $109K |
| Governors Lane LP | — | No change | 197,403 | $108K |
| BNP Paribas Financial Markets | — | No change | 161,927 | $89K |
| Whitebox Advisors LLC | — | No change | 125,000 | $69K |
| Picton Mahoney Asset Management | — | No change | 125,000 | $69K |
| Aristeia Capital, L.L.C. | — | No change | 125,000 | $67K |
| Clear Street Group Inc. | — | Reduce -13.4% | 113,240 | $62K |
| Verition Fund Management LLC | — | Reduce -17.0% | 87,000 | $48K |
| Schonfeld Strategic Advisors LLC | — | Reduce -24.8% | 82,192 | $45K |
| MMCAP International Inc. SPC | — | No change | 62,500 | $34K |
| Glazer Capital, LLC | — | Reduce -59.3% | 55,000 | $30K |
| Parallax Volatility Advisers, L.P. | — | Reduce -59.8% | 49,796 | $27K |
| Gritstone Asset Management LLC | — | No change | 49,540 | $27K |
| Hudson Bay Capital Management LP | — | No change | 39,994 | $22K |
| Toronto Dominion Bank | — | Add +25.6% | 39,269 | $22K |
| Readystate Asset Management LP | — | No change | 25,000 | $14K |
| Wolverine Asset Management LLC | — | No change | 3,521 | $2K |
| UBS Group AG | — | New | 782 | $429 |
"% of holder's portfolio" is ATIIW's weight in each manager's 13F, not the share of Archimedes Tech-30 the manager owns.