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Disclosery

ATII ARCHIMEDES TECH SPAC PARTNER

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ORD SHS (common), issuer CIK 2028516

54 managers (54 13F filers) reported a position in ATII shares at 2026-03-31, 22,185,740 shares in all. 7 filers opened a position and 3 filers sold out during the quarter.

Managers
54
13F filers
54
New
7
Added
6
Reduced
10
Sold out
3
Shares held by filers
22,185,740

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
TENOR CAPITAL MANAGEMENT Co., L.P.1,500,000$15.6M0.24%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC1,300,000$13.6M0.14%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,138,500$11.9M0.01%013F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,000,000$10.4M0.06%013F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC920,672$9.58M0.16%-43,71013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…907,144$9.44M0.46%013F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP850,000$8.85M0.08%013F-HRTimelineGroup
Ghisallo Capital Management LLC800,000$8.35M0.23%013F-HRTimeline
Governors Lane LP759,556$7.93M0.99%+93913F-HRTimeline
Alberta Investment Management Corp750,000$7.84M0.05%013F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC750,000$7.81M0.17%-114,30313F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.55M0.01%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…700,000$7.32M0.04%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.661,337$6.9M0.52%+3,01513F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK650,000$6.77M0.01%+499,99813F-HRTimelineGroup
Sculptor Capital LPin group Sculptor Capital LP600,646$6.25M0.07%013F-HRTimelineGroup
Jain Global LLC500,000$5.22M0.07%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT500,000$5.21M0.05%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP450,000$4.68M0.17%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC427,500$4.45M0.22%-20,25013F-HRTimeline
RLH Capital LLC400,907$4.18M2.13%13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.17M0.02%013F-HRTimeline
J. Goldman & Co LP369,778$3.85M0.18%new13F-HRTimeline
Periscope Capital Inc.352,880$3.68M0.64%-95,22013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC327,450$3.41M<0.01%+3,59613F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC307,985$3.21M<0.01%013F-HRTimelineGroup
Mint Tower Capital Management B.V.300,000$3.12M0.29%013F-HRTimeline
Meteora Capital, LLC295,612$3.08M0.23%-422,82113F-HRTimeline
Centiva Capital, LP285,515$2.98M0.14%013F-HRTimeline
Quarry LP285,000$2.97M0.6%new13F-HRTimeline
Shaolin Capital Management LLC270,783$2.82M0.12%013F-HRTimeline
ARISTEIA CAPITAL, L.L.C.250,000$2.6M0.06%013F-HRTimeline
WHITEBOX ADVISORS LLC250,000$2.6M0.04%013F-HRTimeline
Verition Fund Management LLC231,470$2.42M0.02%013F-HRTimeline
BERKLEY W R CORP208,065$2.17M0.12%-20,14113F-HRTimeline
O'Connor Alternative Investments LLC200,000$2.09M0.11%13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
L1 Global Manager Pty Ltd200,000$2.08M1.68%013F-HRTimeline
Schonfeld Strategic Advisors LLC173,515$1.81M0.01%013F-HRTimeline
DLD Asset Management, LP150,000$1.56M0.16%-50,00013F-HRTimeline
READYSTATE ASSET MANAGEMENT LP148,734$1.55M0.09%+1,20013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC134,280$1.4M0.02%-221,07413F-HRTimelineGroup
MMCAP International Inc. SPCin group MMCAP125,000$1.3M0.11%013F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC99,081$1.03M1.1%013F-HRTimeline
Lineage Point Capital LP95,895$1M0.24%new13F-HRTimeline
K2 PRINCIPAL FUND, L.P.87,900$915K0.1%013F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.78,500$819K<0.01%013F-HRTimelineGroup
Clear Street Group Inc.in group Clear Street Group Inc.77,452$806K<0.01%+73,25713F-HRTimelineGroup
CSS LLC/IL57,143$595K0.03%013F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC53,686$561K0.02%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS37,744$393K<0.01%new13F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC19,469$202K<0.01%-284,35813F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC11,102$116K<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC10,377$108K<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY62$645<0.01%-6813F-HRTimelineGroup