Archimedes Tech Spac PartnerARCIW Preferred / convertible 13F holders, Q2 2026 (June 30) 41 holders +12
15 new positions
3 sold out
1 famous investor
$0.74 avg. 13F price*
At the end of Q2 2026 , 41 institutions reported holding Archimedes Tech Spac Partner (ARCIW) in their 13F filings, up 12 from Q1 2026. 15 opened new positions and 3 sold out. The largest holders were Boothbay Fund Management, LLC ($250K), Centiva Capital, LP ($243K) and Magnetar Financial LLC ($225K). One famous investor held it David E. Shaw ( of D. E. Shaw & Co.'s portfolio).
Company Archimedes Tech Spac Partner
CUSIP G0453R113
Latest filing quarter Q2 2026 History Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026 Institutions Total Value New Positions 15 $1.2M Exits 3 $28K
All 13F filers, Q1 2026 → Q2 2026: 1,434,448 shares bought and 339,994 shares sold, net +1,094,454 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 41 holders Portfolio Manager % of Holder's Portfolio Change vs Q1 2026 Shares Value ▼ Boothbay Fund Management, LLC — New 25,000 $250K Centiva Capital, LP — New 324,439 $243K Magnetar Financial LLC — No change 300,000 $225K Linden Advisors LP — No change 299,999 $188K TENOR CAPITAL MANAGEMENT Co., L.P. — No change 250,000 $188K Alberta Investment Management Corp — New 250,000 $188K Governors Lane LP — No change 250,000 $156K K2 Principal Fund, L.P. — Add +9.6% 308,837 $154K Adage Capital Partners Gp, L.L.C. — Reduce -46.7% 200,000 $150K Sona Asset Management (us) LLC — No change 200,000 $150K AQR Arbitrage LLC — New 189,403 $142K Verition Fund Management LLC — Reduce -0.2% 187,200 $140K Healthcare of Ontario Pension Plan Trust Fund — No change 137,500 $103K Polar Asset Management Partners Inc. — Add +3.4% 129,300 $97K Moore Capital Management, LP — No change 125,000 $94K Shaolin Capital Management LLC — Add +4.2% 114,720 $86K Rivernorth Capital Management, LLC — New 125,000 $81K D. E. Shaw & Co. — No change 106,250 $80K BNP Paribas Financial Markets — New 123,093 $77K Periscope Capital Inc. — No change 101,100 $63K Commonwealth of Pennsylvania Public School Empls Retrmt SYS — New 100,000 $63K MMCAP International Inc. SPC — New 75,000 $56K Radcliffe Capital Management, L.P. — Add +0.1% 81,385 $51K HBK Investments L P — No change 62,501 $47K Meteora Capital, LLC — Reduce -32.1% 83,985 $42K Clear Street Group Inc. — Reduce -5.3% 55,206 $41K 683 Capital Management, LLC — No change 50,000 $38K Parallax Volatility Advisers, L.P. — New 50,000 $38K DLD Asset Management, LP — No change 42,499 $32K Glazer Capital, LLC — Reduce -57.9% 50,000 $31K Picton Mahoney Asset Management — New 37,499 $28K Mint Tower Capital Management B.V. — No change 37,500 $28K Schonfeld Strategic Advisors LLC — New 40,000 $25K Wealthspring Capital LLC — New 40,870 $20K Alpine Global Management, LLC — Add +7.2% 40,200 $20K Whitebox Advisors LLC — No change 25,000 $19K Context Capital Management, LLC — No change 25,000 $16K Bulldog Investors, LLP — New 15,000 $11K Arax Advisory Partners — New 375 $188 UBS Group AG — New 57 $29 Royal Bank of Canada — Reduce -44.4% 375 $0
"% of holder's portfolio" is ARCIW's weight in each manager's 13F, not the share of Archimedes Tech Spac Partner the manager owns.