ARCI · NASDAQ · Shell Companies

Archimedes Tech SPAC Partners III (ARCI)

Pursues a technology business combination including AI, cloud services, and automotive technology.

$10.12
At close−0.02 (−0.20%)

Breakdown13F · 13D/G · Form 4

Institutions40 holders · as of Mar 31, 202644.14%15.57M shares
Otherremainder55.86%19.70M shares

35.26M company shares as of Aug 22, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

The share count has not been confirmed by a second filing; stakes use it as it stands.

Top shareholders13F · 13D/G · Form 4

HolderStakeSharesEvidence
Adage Capital Partners GP, L.L.C.Institution
5.10%1.80M13Fas of Mar 31, 2026
Linden Advisors LPInstitution
3.40%1.20M13Fas of Mar 31, 2026
Magnetar Financial LLCInstitution
3.40%1.20M13Fas of Mar 31, 2026
Governors Lane LPInstitution
2.84%1.00M13Fas of Mar 31, 2026
Tenor Capital Management Co., L.P.Institution
2.84%1.00M13Fas of Mar 31, 2026
Sona Asset Management (US) LLCInstitution
2.27%800,00013Fas of Mar 31, 2026
Verition Fund Management LLCInstitution
2.13%750,00013Fas of Mar 31, 2026
Healthcare of Ontario Pension Plan Trust FundInstitution
1.56%550,00013Fas of Mar 31, 2026
Shaolin Capital Management LLCInstitution
1.53%540,45413Fas of Mar 31, 2026
Glazer Capital, LLCInstitution
1.43%504,60213Fas of Mar 31, 2026
Moore Capital Management, LPInstitution
1.42%500,00013Fas of Mar 31, 2026
Polar Asset Management Partners Inc.Institution
1.42%500,00013Fas of Mar 31, 2026
Meteora Capital, LLCInstitution
1.37%483,74013Fas of Mar 31, 2026
D. E. Shaw & Co., Inc.Institution
1.21%425,00013Fas of Mar 31, 2026
Radcliffe Capital Management, L.P.Institution
1.17%414,29713Fas of Mar 31, 2026
Periscope Capital Inc.Institution
1.16%409,00113Fas of Mar 31, 2026
Hudson Bay Capital Management LPInstitution
0.85%300,00013Fas of Mar 31, 2026
K2 Principal Fund, L.P.Institution
0.85%299,53613Fas of Mar 31, 2026
Two Sigma Investments, LPInstitution
0.78%273,79113Fas of Mar 31, 2026
HBK Investments L PInstitution
0.71%250,00413Fas of Mar 31, 2026
Ghisallo Capital Management LLCInstitution
0.71%250,00013Fas of Mar 31, 2026
Berkley W R CorpInstitution
0.70%248,00013Fas of Mar 31, 2026
Clear Street Group Inc.Institution
0.68%240,76313Fas of Mar 31, 2026
683 Capital Management, LLCInstitution
0.57%200,00013Fas of Mar 31, 2026
First Trust Capital Management L.P.Institution
0.57%200,00013Fas of Mar 31, 2026

13F — a manager's quarterly holdings

Institutions13F, as of Mar 31, 2026

40 holders · 15.57M shares · 40 new positions · 40 increased · 0 reduced · 0 closed

HolderShares% outstandingChg q/qFiled
Adage Capital Partners GP, L.L.C.1.80M5.10%+1.80MnewMay 15, 2026
Linden Advisors LP1.20M3.40%+1.20MnewMay 15, 2026
Magnetar Financial LLC1.20M3.40%+1.20MnewMay 13, 2026
Tenor Capital Management Co., L.P.1.00M2.84%+1.00MnewMay 15, 2026
Governors Lane LP1.00M2.84%+1.00MnewMay 15, 2026
Sona Asset Management (US) LLC800.0K2.27%+800.0KnewMay 15, 2026
Verition Fund Management LLC750.0K2.13%+750.0KnewMay 15, 2026
Healthcare of Ontario Pension Plan Trust Fund550.0K1.56%+550.0KnewMay 14, 2026

Ownership statements13D/G · 5% or more, as filed

No 13D/G filer at 5% or more on record.

Insider tradesForm 4

Latest trades

Nothing filed in the last 12 months.

CongressHouse and Senate disclosures

Not reported.