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ATII on Nasdaq

Archimedes Tech SPAC Partners II Co.

Blank check company, listed on Nasdaq (ATII)1

In its 2026 annual report the company says: “We are a blank check company incorporated in the Cayman Islands as an exempted company for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or other similar business combination with one or more businesses. We have neither engaged in any operations nor generated any revenue to date.”3 It is headquartered in Claymont, Delaware.1

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Last updated Oct 21, 2026.

Overview

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  • TickerATII on Nasdaq1
  • IndustryBlank Checks1
  • HeadquartersClaymont, Delaware1
  • Business address2093 Philadelphia Pike, #1968, Claymont, De 197032
  • Filer categoryNon-accelerated filer, Smaller reporting company, Emerging growth company2

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We are a blank check company incorporated in the Cayman Islands as an exempted company for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or other similar business combination with one or more businesses. We have neither engaged in any operations nor generated any revenue to date. Based on our business activities, the Company is a “shell company” as defined under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) because we have no operations and nominal assets consisting almost entirely of cash.3 From its latest annual report

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Financial statements

Every line of the income statement as filed: the last 1 fiscal year, latest first.4

Period ending2025-12-31
General and administrative expenses$786.0K
Loss from operations-$786.0K
Interest earned on cash in bank account$8.7M
Total other income$8.8M
Net income (loss)$8.0M

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Corporate structure

Archimedes Tech SPAC Partners II Co. sits at the top of its group. 1 entity on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Archimedes Tech SPAC Partners II Co.

  • TENOR CAPITAL MANAGEMENT Co., L.P. Filed SCHEDULE 13G/A on Archimedes Tech SPAC Partners II Co., latest Aug 14, 2026 (3 filings since Feb 19, 2025)
  • Barclays Filed SCHEDULE 13G/A on Archimedes Tech SPAC Partners II Co., latest Feb 11, 2026 (2 filings since Aug 12, 2025)
  • Sculptor Capital LP Filed SCHEDULE 13G/A on Archimedes Tech SPAC Partners II Co., latest Aug 14, 2025 (2 filings since Feb 19, 2025)
  • Archimedes Tech SPAC Partners II Co. Claymont, Delaware

Built from major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Archimedes Tech SPAC Partners II Co. reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$1.4M4 Dec 31, 2025$04 Dec 31, 2024

Properties, in its own words

We do not own any real estate or other physical properties materially important to our operations. Our principal executive offices are located at 2093 Philadelphia Pike #1968, Claymont, DE 19703. The cost for this space is included in the $10,000 per month fee that we will pay to our sponsor or an affiliate for office space, administrative and support services. We consider our current office space adequate for our current operations.

Item 2 of the 10-K filed Mar 4, 2026.3

Leadership

Who has led Archimedes Tech SPAC Partners II Co., and when. Pick a name to see everywhere that person has worked.

Chief executive

  1. Long Long2025
  • Chief executive officerLong Long Feb 10, 2025 to Feb 12, 20257
Board members and other officers (5)

Timeline

  1. Jul 14, 20268-K Unregistered sale of shares; Other events12
  2. Jun 25, 20268-K Other events13
  3. Apr 30, 20268-K Regulation FD disclosure14
  4. Apr 22, 20268-K Regulation FD disclosure15
  5. Apr 20, 20268-K Entered a material agreement; Unregistered sale of shares; Regulation FD disclosure16
  6. Mar 31, 20258-K Other events17
  7. Feb 19, 20258-K Other events18
  8. Feb 14, 20258-K Entered a material agreement; Unregistered sale of shares; Bylaws or fiscal year changed19
  9. Feb 10, 2025New chief executive Long Long becomes CEO7

Filings

57 filings to the SEC since October 2021: 2 annual reports, 5 quarterly reports, 8 major events, 10 insider forms, 7 large holders, 25 other. The latest 20:

  1. Oct 13, 2026DEFA14A EDGAR
  2. Sep 24, 2026DEFM14A EDGAR
  3. Aug 14, 2026SCHEDULE 13G/A EDGAR
  4. Aug 13, 202610-Q EDGAR
  5. Jul 14, 20268-K EDGAR
  6. Jun 25, 20268-K EDGAR
  7. May 14, 202610-Q EDGAR
  8. Apr 30, 2026425 EDGAR
  9. Apr 30, 20268-K EDGAR
  10. Apr 23, 2026425 EDGAR
  11. Apr 22, 2026425 EDGAR
  12. Apr 22, 20268-K EDGAR
  13. Apr 21, 2026425 EDGAR
  14. Apr 20, 20268-K EDGAR
  15. Mar 4, 202610-K EDGAR
  16. Feb 11, 2026SCHEDULE 13G/A EDGAR
  17. Nov 7, 202510-Q EDGAR
  18. Nov 7, 2025SCHEDULE 13G/A EDGAR
  19. Aug 14, 2025SCHEDULE 13G/A EDGAR
  20. Aug 12, 2025SCHEDULE 13G EDGAR

The 57 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

2 open-market trades by officers, directors and large owners since October 2021: 2 buys and 0 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Feb 12, 2025Archimedes Tech SPAC Sponsors II LLC10% ownerBuy530,000Form 4
Feb 12, 2025Long LongChief Executive OfficerBuy530,000Form 4

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

SEC filer profile

How Archimedes Tech SPAC Partners II Co. is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARArchimedes Tech SPAC Partners II Co.1
  • CIK0002028516
  • Filer statusNon-accelerated filer an emerging growth company; a smaller reporting company; a shell company3
  • Incorporated inCayman Islands3
  • Fiscal year endsDecember 311
  • Industry code (SIC)6770 Blank Checks1
  • SEC reviewing officeOffice of Real Estate & Construction, Division of Corporation Finance1
  • Business address2093 Philadelphia Pike, #1968, Claymont, DE 197031
  • Phone(725) 312-24301
  • Shares outstanding29,590,000 as of Aug 13, 20266
  • Public float$235.3M as of Jun 30, 20253
  • AuditorWithumSmith+Brown, PC, New York, New York PCAOB ID 100; no auditor attestation of internal control over financial reporting3
  • On EDGAR sinceJul 3, 20241
  • Filings70 in all: 425 (16), 8-K (9), 3 (8), 10-Q (5), S-1/A (4), SCHEDULE 13G/A (4), CORRESP (3), SCHEDULE 13G (3)1
    All 21 form types

    UPLOAD (3), 10-K (2), 4 (2), DRSLTR (2), 424B4 (1), 8-A12B (1), CERT (1), DEFA14A (1), DEFM14A (1), DRS (1), DRS/A (1), EFFECT (1), S-1 (1)

  • Latest filingsAnnual report (10-K) Mar 4, 2026
    Quarterly report (10-Q) Aug 13, 2026
    Latest 8-K (8-K) Oct 13, 2026

Securities registered for trading

ClassSymbolExchange
Units, each consisting of one Ordinary Share, par value $0.0001 per share, and one-half of one redeemable WarrantATIIUNasdaq
Ordinary SharesATIINasdaq
WarrantsATIIWNasdaq

From the cover page of the 10-K filed Mar 4, 2026 (Section 12(b) of the Exchange Act).3

Risk factors and legal proceedings

Legal proceedings

We may be subject to legal proceedings, investigations and claims incidental to the conduct of our business from time to time. There is currently no material litigation, arbitration or governmental proceeding currently pending against us or any members of our management team in their capacity as such, and we and the members of our management team have not been subject to any such proceeding.

The opening of Item 3, Legal Proceedings.3

Sources

The numbers on this page point here. Each one links to the record it came from.

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    SEC EDGAROther events
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    SEC EDGAROther events
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    SEC EDGAROther events
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