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Disclosery

ATII ARCHIMEDES TECH SPAC PARTNER

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ORD SHS (common), issuer CIK 2028516

49 managers (49 13F filers) reported a position in ATII shares at 2025-12-31, 22,244,887 shares in all. 2 filers opened a position and 0 filers sold out during the quarter.

Managers
49
13F filers
49
New
2
Added
11
Reduced
9
Sold out
0
Shares held by filers
22,244,887

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$15.5M0.22%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC1,300,000$13.5M0.13%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,138,500$11.8M0.01%013F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,000,000$10.4M0.06%013F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC964,382$9.99M0.21%013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…907,144$9.4M0.44%+7,14413F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC864,303$8.95M0.24%-10,78413F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP850,000$8.81M0.08%013F-HRTimelineGroup
Ghisallo Capital Management LLC800,000$8.29M0.37%013F-HRTimeline
Governors Lane LP758,617$7.86M0.73%+8,61713F-HRTimeline
Alberta Investment Management Corp750,000$7.77M0.05%013F-HR/ATimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.51M0.01%013F-HRTimelineGroup
Meteora Capital, LLC718,433$7.44M0.62%+68,53313F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…700,000$7.25M0.04%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.658,322$6.82M0.37%+46,80013F-HRTimeline
Sculptor Capital LPin group Sculptor Capital LP600,646$6.22M0.07%-139,35413F-HRTimelineGroup
Driehaus Capital Management LLC573,083$5.94M0.04%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT500,000$5.18M0.06%013F-HRTimeline
Jain Global LLC500,000$5.18M0.05%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP450,000$4.66M0.1%013F-HRTimeline
Periscope Capital Inc.448,100$4.64M0.9%-51,90013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC447,750$4.64M0.22%+90,00013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.14M0.02%013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC355,354$3.68M0.05%-100,97213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC323,854$3.36M<0.01%013F-HR/ATimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC307,985$3.19M<0.01%+4,02013F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC303,827$3.11M0.05%-31,27113F-HRTimelineGroup
Mint Tower Capital Management B.V.300,000$3.11M0.37%013F-HRTimeline
Centiva Capital, LP285,515$2.96M0.18%013F-HRTimeline
Shaolin Capital Management LLC270,783$2.81M0.11%+70,78313F-HRTimeline
ARISTEIA CAPITAL, L.L.C.250,000$2.59M0.07%013F-HRTimeline
WHITEBOX ADVISORS LLC250,000$2.59M0.04%013F-HRTimeline
Verition Fund Management LLC231,470$2.4M0.01%-20,00013F-HRTimeline
BERKLEY W R CORP228,206$2.36M0.13%013F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…200,000$2.07M0.06%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
DLD Asset Management, LP200,000$2.07M0.22%+50,00013F-HRTimeline
L1 Global Manager Pty Ltd200,000$2.07M1.36%13F-HRTimeline
Schonfeld Strategic Advisors LLC173,515$1.8M0.01%-48,15013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK150,002$1.55M<0.01%+213F-HRTimelineGroup
READYSTATE ASSET MANAGEMENT LP147,534$1.53M0.07%013F-HRTimeline
MMCAP International Inc. SPCin group MMCAP125,000$1.29M0.13%013F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC99,081$1.03M0.98%013F-HRTimeline
K2 PRINCIPAL FUND, L.P.87,900$911K0.09%-25,77013F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.78,500$813K<0.01%new13F-HRTimelineGroup
CSS LLC/IL57,143$592K0.03%+7,14313F-HRTimeline
StoneX Group Inc.in group StoneX Group Inc.50,613$524K0.02%new13F-HRTimelineGroup
Warberg Asset Management LLC10,000$104K0.03%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.4,195$43.5K<0.01%-25,00013F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY130$1.35K<0.01%+7913F-HR/ATimelineGroup