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 22 institutional investors as of Q2 2026. Largest holders: ADAGE CAPITAL PARTNERS GP, L.L.C. ($18M), Magnetar Financial LLC ($12M), LINDEN ADVISORS LP ($12M). Net institutional sentiment: Bullish.

22

Holders

$103.5M

Total Value

75% (16)

Consensus

12 buying - 4 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)62

Insider (Form 4)85

Activist (13D/13G)81

Congressional (STOCK Act)33

Holder Quality

82

★★★★★

Elite

12

★★★★

Strong

10

★★★

Solid

48

★★

Below

77

★

Weak

Held by 22 funds

Who's Trading

Source dates: Price Aug 27, 2026 · Insiders Jan 26, 2026 · Activists May 13, 2026 · Congress none

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

InsiderALArchimedes Tech SPAC Sponsors III LLCBuyJan 26, 2026

InsiderLLLong LongBuyJan 26, 2026

View all insider tradesView all activist filings

Top Holders

Top Holders (22)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
AGADAGE CAPITAL PARTNERS GP, L.L.C.	Unchanged	1.8M	$18M	0.0%	+2.94%	0
Magnetar Financial LLC	Unchanged	1.2M	$12M	0.1%	+2.94%	0
LALINDEN ADVISORS LP	Unchanged	1.2M	$12M	0.1%	+2.94%	0
Alberta Investment Management Corp	New	1M	$10M	0.1%	+1.30%	38
Verition Fund Management LLC	Increased	815,355(+8.7%)	$8.2M	0.0%	+2.81%	30
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	Unchanged	550,000	$5.5M	0.0%	+2.94%	0
MOORE CAPITAL MANAGEMENT, LP	Unchanged	500,000	$5M	0.1%	+2.94%	0
BNP PARIBAS FINANCIAL MARKETS	New	492,372	$4.9M	0.0%	+1.30%	37
DED. E. Shaw & Co., Inc.	Increased	450,500(+6.0%)	$4.5M	0.0%	+2.85%	28
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	New	400,000	$4M	0.0%	+1.30%	37
Hudson Bay Capital Management LP	Unchanged	300,000	$3M	0.0%	+2.94%	0
Schonfeld Strategic Advisors LLC	New	297,404	$3M	0.0%	+1.30%	36
TWO SIGMA INVESTMENTS, LP	Unchanged	273,791	$2.7M	0.0%	+2.94%	0
HBK INVESTMENTS L P	Unchanged	250,004	$2.5M	0.0%	+2.94%	0
TORONTO DOMINION BANK	Increased	175,916(+84.4%)	$1.8M	0.0%	+2.18%	40
MILLENNIUM MANAGEMENT LLC	New	150,000	$1.5M	0.0%	+1.30%	35
PICTON MAHONEY ASSET MANAGEMENT	New	149,996	$1.5M	0.0%	+1.30%	35
Clear Street Group Inc.	Decreased	147,610(-38.7%)	$1.5M	0.0%	+2.94%	0
JPMORGAN CHASE & CO	Unchanged	87,664	$876,640	0.0%	+2.94%	0
Centiva Capital, LP	New	70,050	$701,201	0.0%	+1.30%	34

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ARCIARCHIMEDES TECH SPAC PTNRS I

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Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer