Skip to content

ARCIU ARCHIMEDES TECH SPAC PTNRS I

Follow

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

15 managers (15 13F filers) reported a position in ARCIU shares at 2026-06-30, 4,625,063 shares in all. 1 filer opened a position and 15 filers sold out during the quarter.

Managers
15
13F filers
15
New
1
Added
6
Reduced
1
Sold out
15
Shares held by filers
4,625,063

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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$12.7M0.09%013F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL650,000$6.62M0.03%013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK646,217$6.59M0.01%+396,21713F-HRTimelineGroup
OMERS ADMINISTRATION Corp480,000$4.89M0.03%013F-HRTimeline
ARISTEIA CAPITAL, L.L.C.400,779$4.08M0.06%+98913F-HRTimeline
Lineage Point Capital LP288,776$3.01M0.62%+13,77613F-HRTimeline
BlueCrest Capital Management Ltd275,000$2.82M0.12%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC179,743$1.83M<0.01%-170,25713F-HRTimelineGroup
Qube Research & Technologies Ltd150,000$1.54M<0.01%013F-HRTimeline
Calamos Advisors LLCin group Calamos Advisors LLC124,000$1.29M<0.01%013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…100,000$1.02M0.05%013F-HRTimelineGroup
Clear Street Group Inc.in group Clear Street Group Inc.34,256$349K<0.01%+24,19413F-HRTimelineGroup
HRT FINANCIAL LP25,000$256K<0.01%+413F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC10,523$110K<0.01%new13F-HRTimelineGroup
Tuttle Capital Management, LLC10,769$109K0.07%+76913F-HRTimeline