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Disclosery

ATIIU ARCHIMEDES TECH SPAC PARTNER

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UNIT 10/15/2029 (unit), issuer CIK 2028516

45 managers (45 13F filers) reported a position in ATIIU shares at 2025-03-31, 19,250,140 shares in all. 45 filers opened a position and 0 filers sold out during the quarter.

Managers
45
13F filers
45
New
45
Added
0
Reduced
0
Sold out
0
Shares held by filers
19,250,140

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 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
TENOR CAPITAL MANAGEMENT Co., L.P.1,500,000$15.2M0.22%new13F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,303,242$13.1M0.32%new13F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC1,300,000$13.1M0.17%new13F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…1,000,000$10.1M0.02%new13F-HRTimeline
Linden Advisors LPin group Linden Advisors LP1,000,000$10.1M0.07%new13F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP850,000$8.56M0.17%new13F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC839,370$8.46M0.39%new13F-HRTimelineGroup
CSS LLC/IL820,803$8.27M0.58%new13F-HRTimeline
Ghisallo Capital Management LLC800,000$8.06M0.7%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.31M0.02%new13F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…700,000$7.07M0.04%new13F-HRTimelineGroup
Shaolin Capital Management LLC650,531$6.55M0.27%new13F-HRTimeline
MIZUHO SECURITIES USA LLC600,000$6.01M0.13%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.575,000$5.81M0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO543,595$5.49M<0.01%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC500,000$5.04M<0.01%new13F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP450,000$4.54M0.15%new13F-HR/ATimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC450,000$4.54M0.24%new13F-HRTimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…400,000$4.03M0.23%new13F-HRTimelineGroup
Schonfeld Strategic Advisors LLC350,000$3.53M0.02%new13F-HRTimeline
K2 PRINCIPAL FUND, L.P.319,790$3.22M0.49%new13F-HRTimeline
Periscope Capital Inc.300,000$3.03M1.69%new13F-HRTimeline
Mint Tower Capital Management B.V.300,000$3.02M1.12%new13F-HRTimeline
Verition Fund Management LLC291,500$2.94M0.02%new13F-HRTimeline
ARISTEIA CAPITAL, L.L.C.250,000$2.52M0.08%new13F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT250,000$2.52M0.09%new13F-HRTimeline
Crossingbridge Advisors, LLC250,000$2.52M1.33%new13F-HRTimeline
WHITEBOX ADVISORS LLC250,000$2.52M0.08%new13F-HRTimeline
BERKLEY W R CORP228,206$2.3M0.17%new13F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC218,600$2.21M0.08%new13F-HRTimeline
ATW SPAC MANAGEMENT LLC218,600$2.2M3.67%new13F-HRTimeline
CLEAR STREET LLC166,517$1.68M0.03%new13F-HRTimeline
Centiva Capital, LP150,000$1.51M0.09%new13F-HRTimeline
DLD Asset Management, LP150,000$1.51M0.22%new13F-HR/ATimeline
MMCAP International Inc. SPCin group MMCAP125,000$1.26M0.21%new13F-HRTimelineGroup
Parallax Volatility Advisers, L.P.100,000$1.01M0.03%new13F-HRTimeline
GRITSTONE ASSET MANAGEMENT LLC100,000$1.01M1.06%new13F-HRTimeline
Wealthspring Capital LLCin group Wealthspring Capital LLC77,376$780K1.2%new13F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC65,110$657K<0.01%new13F-HR/ATimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC25,900$261K0.01%new13F-HRTimelineGroup
HIGHBRIDGE CAPITAL MANAGEMENT LLC25,000$252K0.01%new13F-HRTimeline
Tuttle Capital Management, LLC20,000$201K0.88%new13F-HRTimeline
Warberg Asset Management LLC10,000$101K0.03%new13F-HRTimeline
UBS Group AGin group UBS Group AG1,000$10.1K<0.01%new13F-HRTimelineGroup
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0new13F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.