ARCHIMEDES TECH SPAC PTNRS I

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ARCI·G0453R105·US·Common Stock-13D/G

ARCI (ARCHIMEDES TECH SPAC PTNRS I) is held by 18 institutional investors as of Q1 2026. Largest holders: ADAGE CAPITAL PARTNERS GP, L.L.C. ($17.7M), LINDEN ADVISORS LP ($11.8M), Magnetar Financial LLC ($11.8M). Net institutional sentiment: Bullish.

18

Holders

Avg rating(1 Elite)

$76.2M

Total Value

100% (18)

Fund Consensus

18 buying - 0 selling

Smart Money Verdict

View all

Institutional (13F)

Insider (Form 4)

Activist (13D/13G)

Congressional (STOCK Act)

Holder Quality

★★★★★

Elite

★★★★

Strong

★★★

Solid

★★

Below

★

Weak

Held by 18 funds

1 elite

Who's Trading

ActivistADAdage Capital Management, L.P.5.1%May 13, 2026

InsiderLLLong LongBuyJan 26, 2026

InsiderALArchimedes Tech SPAC Sponsors III LLCBuyJan 26, 2026

View all insider tradesView all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Positions (18)History

AllNewIncreasedHeldDecreasedExited

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
AGADAGE CAPITAL PARTNERS GP, L.L.C.	New	1.8M	$17.7M	0.0%	+0.50%	39
LALINDEN ADVISORS LP	New	1.2M	$11.8M	0.1%	+0.50%	39
Magnetar Financial LLC	New	1.2M	$11.8M	0.1%	+0.50%	46
Verition Fund Management LLC	New	750,000	$7.4M	0.0%	+0.50%	38
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	New	550,000	$5.4M	0.0%	+0.50%	37
MOORE CAPITAL MANAGEMENT, LP	New	500,000	$4.9M	0.1%	+0.50%	45
DED. E. Shaw & Co., Inc.	New	425,000	$4.2M	0.0%	+0.50%	37
Hudson Bay Capital Management LP	New	300,000	$3M	0.0%	+0.50%	36
TWO SIGMA INVESTMENTS, LP	New	273,791	$2.7M	0.0%	+0.50%	36
HBK INVESTMENTS L P	New	250,004	$2.5M	0.0%	+0.50%	36
Clear Street Group Inc.	New	240,763	$2.4M	0.0%	+0.50%	36
TORONTO DOMINION BANK	New	95,398	$939,670	0.0%	+0.50%	35
JPMORGAN CHASE & CO	New	87,664	$861,737	0.0%	+0.50%	34
Parallax Volatility Advisers, L.P.	New	50,000	$494,500	0.0%	+0.50%	33
WAWOLVERINE ASSET MANAGEMENT LLC	New	10,087	$99,357	0.0%	+0.50%	30
ROYAL BANK OF CANADA	New	2,700	$27,000	0.0%	+0.50%	30
Virtu Financial LLC	New	90,734	$894	0.0%	+0.50%	15
MORGAN STANLEY	New	17	$167	0.0%	+0.50%	17

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Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer