Archimedes Tech-30ATIIWPreferred / convertible

13F holders, Q3 2025 (September 30)
34holders −1
4new positions
5sold out
1famous investor
$0.52avg. 13F price*

At the end of Q3 2025, 34 institutions reported holding Archimedes Tech-30 (ATIIW) in their 13F filings, down 1 from Q2 2025. 4 opened new positions and 5 sold out. The largest holders were Mint Tower Capital Management B.V. ($1.5M), Harraden Circle Investments, LLC ($623K) and TENOR CAPITAL MANAGEMENT Co., L.P. ($293K). 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

010203040 Q2 2025: 35Q2 2025Q3 2025: 34Q3 2025Q4 2025: 36Q4 2025Q1 2026: 36Q1 2026Q2 2026: 32Q2 2026

Total Exit/New Position Q2 2025 → Q3 2025

InstitutionsTotal Value
New Positions4$156K
Exits5$278K

All 13F filers, Q2 2025 → Q3 2025: 1,231,314 shares bought and 1,144,018 shares sold, net +87,296 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 34 holders
Mint Tower Capital Management B.V. — No change 150,000 $1.5M
Harraden Circle Investments, LLC — Add +62.0% 1,684,715 $623K
TENOR CAPITAL MANAGEMENT Co., L.P. — No change 750,000 $293K
Magnetar Financial LLC — No change 650,000 $241K
Linden Advisors LP — Add +17.0% 585,196 $217K
Shaolin Capital Management LLC — Reduce -5.9% 550,000 $215K
CSS LLC — No change 532,646 $208K
AQR Arbitrage LLC — Reduce -24.9% 489,691 $191K
Healthcare of Ontario Pension Plan Trust Fund — No change 500,000 $187K
LMR Partners LLP — No change 425,000 $166K
Alberta Investment Management Corp — No change 375,000 $146K
Driehaus Capital Management LLC — No change 400,000 $140K
D. E. Shaw & Co. — No change 287,500 $108K
K2 Principal Fund, L.P. — No change 259,895 $91K
Moore Capital Management, LP — No change 225,000 $88K
Periscope Capital Inc. — Reduce -11.2% 198,600 $73K
Governors Lane LP — No change 197,403 $73K
Westchester Capital Management, LLC — No change 199,999 $70K
Rivernorth Capital Management, LLC — New 178,875 $63K
BNP Paribas Financial Markets — New 161,927 $60K
Clear Street Group Inc. — — 130,840 $51K
Whitebox Advisors LLC — No change 125,000 $49K
Glazer Capital, LLC — Reduce -46.0% 135,048 $47K
Picton Mahoney Asset Management — No change 125,000 $47K
Aristeia Capital, L.L.C. — No change 125,000 $46K
Parallax Volatility Advisers, L.P. — Add +122.9% 123,890 $46K
Schonfeld Strategic Advisors LLC — Reduce -19.0% 109,350 $40K
Verition Fund Management LLC — Add +4.8% 104,800 $39K
MMCAP International Inc. SPC — New 62,500 $24K
Gritstone Asset Management LLC — Reduce -0.9% 49,540 $19K
Hudson Bay Capital Management LP — No change 39,994 $16K
Toronto Dominion Bank — Reduce -0.3% 31,270 $12K
Readystate Asset Management LP — New 25,000 $9K
Wolverine Asset Management LLC — Reduce -36.2% 3,521 $1K

"% of holder's portfolio" is ATIIW's weight in each manager's 13F, not the share of Archimedes Tech-30 the manager owns.