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ARCIU ARCHIMEDES TECH SPAC PTNRS I

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UNIT 01/23/2031 (unit), issuer CIK 2083910

29 managers (29 13F filers) reported a position in ARCIU shares at 2026-03-31, 9,099,196 shares in all. 29 filers opened a position and 0 filers sold out during the quarter.

Managers
29
13F filers
29
New
29
Added
0
Reduced
0
Sold out
0
Shares held by filers
9,099,196

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
LMR Partners LLPin group LMR Partners LLP1,250,000$12.5M0.12%new13F-HRTimelineGroup
Alberta Investment Management Corp1,000,000$10M0.06%new13F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC757,625$7.56M0.12%new13F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL650,000$6.5M0.03%new13F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC500,000$5M0.25%new13F-HRTimeline
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…500,000$5M0.19%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS492,375$4.92M<0.01%new13F-HRTimelineGroup
OMERS ADMINISTRATION Corp480,000$4.8M0.03%new13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4M0.02%new13F-HRTimeline
ARISTEIA CAPITAL, L.L.C.399,790$4M0.09%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC350,000$3.5M<0.01%new13F-HRTimelineGroup
MMCAP International Inc. SPCin group MMCAP300,000$3M0.26%new13F-HRTimelineGroup
BlueCrest Capital Management Ltd275,000$2.76M0.26%new13F-HRTimeline
Lineage Point Capital LP275,000$2.75M0.67%new13F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK250,000$2.5M<0.01%new13F-HRTimelineGroup
Schonfeld Strategic Advisors LLC236,368$2.36M0.02%new13F-HRTimeline
Wealthspring Capital LLCin group Wealthspring Capital LLC166,480$1.66M0.4%new13F-HRTimelineGroup
Qube Research & Technologies Ltd150,000$1.5M<0.01%new13F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT150,000$1.5M0.02%new13F-HRTimeline
Calamos Advisors LLCin group Calamos Advisors LLC124,000$1.24M<0.01%new13F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC100,000$1M0.02%new13F-HRTimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…100,000$998K0.05%new13F-HRTimelineGroup
Bulldog Investors, LLP67,500$674K0.15%new13F-HRTimeline
ABC ARBITRAGE SAin group ABC ARBITRAGE SA40,000$400K0.05%new13F-HRTimelineGroup
HRT FINANCIAL LP24,996$250K<0.01%new13F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC20,000$200K0.02%new13F-HRTimeline
Stoic Point Capital Management LLC20,000$200K0.2%new13F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.10,062$101K<0.01%new13F-HRTimelineGroup
Tuttle Capital Management, LLC10,000$99.8K0.16%new13F-HRTimeline