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Disclosery

ARCI ARCHIMEDES TECH SPAC PTNRS I

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ORD SHS (common), issuer CIK 2083910

40 managers (40 13F filers) reported a position in ARCI shares at 2026-03-31, 15,565,533 shares in all. 40 filers opened a position and 0 filers sold out during the quarter.

Managers
40
13F filers
40
New
40
Added
0
Reduced
0
Sold out
0
Shares held by filers
15,565,533

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…1,800,000$17.7M0.03%new13F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,200,000$11.8M0.07%new13F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC1,200,000$11.8M0.12%new13F-HRTimelineGroup
TENOR CAPITAL MANAGEMENT Co., L.P.1,000,000$9.85M0.15%new13F-HRTimeline
Governors Lane LP1,000,000$9.85M1.23%new13F-HRTimeline
SONA ASSET MANAGEMENT (US) LLCin group SONA ASSET MANAGEMENT (US) LLC800,000$7.88M0.3%new13F-HRTimelineGroup
Verition Fund Management LLC750,000$7.39M0.07%new13F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…550,000$5.42M0.01%new13F-HRTimeline
Shaolin Capital Management LLC540,454$5.32M0.22%new13F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC504,602$4.97M0.11%new13F-HRTimelineGroup
Polar Asset Management Partners Inc.500,000$4.92M0.12%new13F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP500,000$4.92M0.18%new13F-HRTimeline
Meteora Capital, LLC483,740$4.76M0.35%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.425,000$4.19M<0.01%new13F-HRTimelineGroup
Radcliffe Capital Management, L.P.414,297$4.08M0.31%new13F-HRTimeline
Periscope Capital Inc.409,001$4.03M0.7%new13F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…300,000$2.96M0.02%new13F-HRTimelineGroup
K2 PRINCIPAL FUND, L.P.299,536$2.95M0.31%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP273,791$2.7M<0.01%new13F-HRTimelineGroup
HBK INVESTMENTS L P250,004$2.46M0.03%new13F-HRTimeline
Ghisallo Capital Management LLC250,000$2.46M0.07%new13F-HRTimeline
BERKLEY W R CORP248,000$2.44M0.13%new13F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.240,763$2.37M0.01%new13F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC200,000$1.97M0.18%new13F-HRTimelineGroup
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP200,000$1.97M0.1%new13F-HRTimelineGroup
DLD Asset Management, LP170,000$1.67M0.17%new13F-HRTimeline
Mint Tower Capital Management B.V.150,000$1.48M0.14%new13F-HRTimeline
Alpine Global Management, LLC150,000$1.48M0.22%new13F-HRTimeline
StoneX Group Inc.in group StoneX Group Inc.109,745$1.08M0.06%new13F-HRTimelineGroup
WHITEBOX ADVISORS LLC100,000$985K0.01%new13F-HRTimeline
Context Capital Management, LLC100,000$985K0.02%new13F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK95,398$940K<0.01%new13F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC90,734$894K0.04%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO87,664$862K<0.01%new13F-HR/ATimelineGroup
L1 Global Manager Pty Ltd75,000$739K0.6%new13F-HRTimeline
Parallax Volatility Advisers, L.P.50,000$494K0.02%new13F-HRTimeline
DELTEC ASSET MANAGEMENT LLC35,000$345K0.06%new13F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC10,087$99.4K<0.01%new13F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,700$27K<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY17$167<0.01%new13F-HRTimelineGroup