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Archimedes Tech SPAC Partners II Co.

ATIIW
Exchange
Nasdaq
Industry
Blank Checks
SEC CIK
0002028516

No open-market purchases or sales by Archimedes Tech SPAC Partners II Co. insiders were filed in the last 90 days; 33 institutions reported holding it in 13F filings for Q2 2026, worth $18.1M in total; no superinvestor holds it.

Other share classesATIIATIIU

Q2 2025 vs. Q1 2025

How the institutions holding Archimedes Tech SPAC Partners II Co. changed between Q1 2025 and Q2 2025.

All holders in Q2 2025All holders in Q1 2025

13F holders of ATIIW: Q1 2025 compared with Q2 2025
MeasureQ1 2025Q2 2025Change
Holders036+36
Shares09.92M+9.92M
Value$0$3.76M+$3.76M

New holders (36)

Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q2 2025 but not at the end of Q1 2025.

Institutions new to ATIIW in Q2 2025
InstitutionSharesValue% of portfolio
Harraden Circle Investments, LLC1,040,000$422.2K0.11%
Tenor Capital Management Co., L.P.750,000$304.5K0.00%
Magnetar Financial LLC650,000$250.6K0.00%
Shaolin Capital Management LLC584,603$237.3K0.01%
CSS LLC532,646$216.3K0.01%
Sculptor Capital LP595,760$214.5K0.00%
Healthcare of Ontario Pension Plan Trust Fund500,000$192.8K0.00%
CNH Partners LLC651,618$182.5K0.00%
Linden Advisors LP499,999$180.0K0.00%
LMR Partners LLP425,000$172.6K0.00%
Driehaus Capital Management LLC400,000$154.2K0.00%
Alberta Investment Management Corp375,000$152.3K0.00%
D. E. Shaw & Co., Inc.287,500$110.9K0.00%
K2 Principal Fund, L.P.259,895$106.6K0.02%
Glazer Capital, LLC249,938$101.0K0.00%
Periscope Capital Inc.223,600$87.2K0.03%
Moore Capital Management, LP225,000$86.8K0.00%
Westchester Capital Management, LLC199,999$77.1K0.00%
Governors Lane LP197,403$71.1K0.01%
Clear Street LLC141,967$57.6K0.00%
Schonfeld Strategic Advisors LLC135,000$54.8K0.00%
Picton Mahoney Asset Management125,000$51.0K0.00%
Whitebox Advisors LLC125,000$50.7K0.00%
Aristeia Capital LLC125,000$45.0K0.00%
Verition Fund Management LLC100,000$38.6K0.00%
Centiva Capital, LP75,000$28.9K0.00%
Mizuho Securities USA LLC85,197$25.6K0.00%
Parallax Volatility Advisers, L.P.55,590$22.6K0.00%
Gritstone Asset Management LLC50,000$20.3K0.02%
Hudson Bay Capital Management LP39,994$16.2K0.00%
Toronto Dominion Bank31,370$12.7K0.00%
Commonwealth of Pennsylvania Public School Empls Retrmt Sys22,557$9.16K0.00%
Highbridge Capital Management LLC–$3.90K0.00%
Wolverine Asset Management LLC5,521$2.24K0.00%
UBS Group AG874$3550.00%
Mint Tower Capital Management B.V.150,000––

Sold out (0)

Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q1 2025 and filed for Q2 2025 without it.

None.