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Disclosery

ATII ARCHIMEDES TECH SPAC PARTNER

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ORD SHS (common), issuer CIK 2028516

46 managers (46 13F filers) reported a position in ATII shares at 2025-09-30, 22,015,854 shares in all. 4 filers opened a position and 0 filers sold out during the quarter.

Managers
46
13F filers
46
New
4
Added
5
Reduced
11
Sold out
0
Shares held by filers
22,015,854

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
TENOR CAPITAL MANAGEMENT Co., L.P.1,500,000$15.3M0.2%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC1,300,000$13.3M0.08%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,138,500$11.6M0.01%013F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,000,000$10.2M0.07%013F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC964,382$9.85M0.25%-5,00013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…900,000$9.19M0.48%+250,00013F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC875,087$8.94M0.3%013F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP850,000$8.68M0.11%013F-HRTimelineGroup
Ghisallo Capital Management LLC800,000$8.19M0.27%013F-HRTimeline
Governors Lane LP750,000$7.68M1.06%013F-HRTimeline
Alberta Investment Management Corp750,000$7.67M0.06%013F-HR/ATimeline
Sculptor Capital LPin group Sculptor Capital LP740,000$7.56M0.1%-560,00013F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.4M0.01%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…700,000$7.15M0.04%013F-HR/ATimelineGroup
Meteora Capital, LLC649,900$6.64M0.7%+257,37013F-HRTimeline
Radcliffe Capital Management, L.P.611,522$6.26M0.39%+284,60213F-HRTimeline
Driehaus Capital Management LLC573,083$5.85M0.04%-91,21513F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT500,000$5.12M0.07%013F-HRTimeline
Periscope Capital Inc.500,000$5.12M1.24%+50,00013F-HRTimeline
Jain Global LLC500,000$5.12M0.07%013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC456,326$4.66M0.07%+441,18513F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP450,000$4.59M0.09%013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.09M0.02%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC357,750$3.65M0.21%new13F-HRTimeline
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC335,098$3.39M0.07%-119,90213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC323,854$3.31M<0.01%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC303,965$3.1M<0.01%new13F-HRTimelineGroup
Mint Tower Capital Management B.V.300,000$3.06M0.38%013F-HRTimeline
Centiva Capital, LP285,515$2.92M0.27%013F-HRTimeline
Verition Fund Management LLC251,470$2.57M0.01%-513F-HRTimeline
ARISTEIA CAPITAL, L.L.C.250,000$2.55M0.08%013F-HRTimeline
WHITEBOX ADVISORS LLC250,000$2.55M0.05%013F-HRTimeline
BERKLEY W R CORP228,206$2.33M0.15%013F-HRTimeline
Schonfeld Strategic Advisors LLC221,665$2.27M0.02%-98,33513F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…200,000$2.05M0.06%013F-HR/ATimelineThe filing omitted confidential holdings, a later amendment may add them.
Shaolin Capital Management LLC200,000$2.04M0.1%013F-HRTimeline
DLD Asset Management, LP150,000$1.53M0.2%-150,00013F-HR/ATimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK150,000$1.53M<0.01%-244,70013F-HRTimelineGroup
READYSTATE ASSET MANAGEMENT LP147,534$1.51M0.07%new13F-HRTimeline
MMCAP International Inc. SPCin group MMCAP125,000$1.28M0.15%new13F-HRTimelineGroup
K2 PRINCIPAL FUND, L.P.113,670$1.16M0.12%-46,50013F-HRTimeline
GRITSTONE ASSET MANAGEMENT LLC99,081$1.01M1.04%-91913F-HRTimeline
CSS LLC/IL50,000$511K0.03%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.29,195$298K<0.01%13F-HRTimelineGroup
Warberg Asset Management LLC10,000$102K0.03%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY51$521<0.01%-7013F-HR/ATimelineGroup