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Archimedes Tech SPAC Partners II Co.ATII

Class A ATIIUnits ATIIUWarrants ATIIWCIK 0002028516

Shareholder meeting

Oct 16, 2026

A meeting is scheduled. The deadline for electing to redeem usually falls two to seven days before it; this proxy did not state it in a form we would parse without guessing, so check the filing.

Cash in trust

$244M

$244,162,068

Trust per share

$10.62

Redemption value

IPO

Feb 2025

$225M raised

Combination deadline

Nov 12, 2026

23 days remaining

Filings on record

72

Latest Oct 16, 2026

Overview

Archimedes Tech SPAC Partners II Co. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0002028516. It completed its initial public offering in Feb 2025, raising $225M in gross proceeds and listing on Nasdaq. Class A shares trade under the ticker ATII, units under ATIIU, warrants under ATIIW on Nasdaq. The vehicle is sponsored by Archimedes Tech through Archimedes Tech SPAC Sponsors II LLC. The mandate targets technology. Shareholders voted the combination through; closing is a matter of mechanics, and the redemption window has already run.

“we intend to focus our search for business combination targets in the technology industry.”
The mandate, as stated in the IPO prospectus

Reading the filings

Arithmetic on what Archimedes Tech SPAC Partners II Co. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.

  • Trading at a discount to trust

    At $8.55 the shares change hands 19.54% below the $10.62 they can be redeemed for. A holder buying here is paid that spread to carry deadline and redemption risk until the vote, and the trust keeps accreting underneath it.

  • Trust versus the $10 unit

    The trust holds $10.62 per public share, 6.2% above the $10.00 the units were sold at. That spread is accrued interest on the trust and, where the charter provides for it, sponsor contributions paid in to buy more time. It is the floor a public shareholder can redeem at, not a valuation of the business.

  • Warrant coverage

    Each unit carried one-half warrant per unit. Warrants are dilution deferred: they cost the holder nothing until exercised, and they overhang the post-combination share count. Thinner coverage is generally a sign of a stronger book at pricing.

  • Sponsor record

    Archimedes Tech has launched 5 vehicles. Of the 1 that have resolved, 1 closed a combination and 0 liquidated, a 100% completion rate. A sponsor's record is not a forecast, but it does tell you whether the team has taken a deal across the line before.

  • Underwriting

    BTIG led the offering. It has been named on 79 SPAC IPOs, book-running 73 of them, and 52.8% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.

Where it is in its life

From listing to the date Archimedes Tech SPAC Partners II Co. must close a deal, extend again, or return the trust. The marker is today.

IPO Feb 12, 2025Deadline Nov 12, 2026615 days in23 days left
How busy it has been

Filings per month since the first one. A vehicle that has gone quiet with a deadline ahead is a different proposition from one that is still working.

221102024-072026-10

72 filings in all. 13 in the last three months, against a busiest month of 22.

News on Archimedes Tech SPAC Partners II Co.

Last 90 days

News sentiment

Positive
negativeneutralpositive

Across 8 recent stories, weighted towards the newest. Scored by our own headline classifier using finance- and SPAC-specific terms. It reads what a story is about, not what the shares are worth.

SEC filing history

Free tier: filings older than 24 hours
  • 425

    Business-combination communication

    Accession 0001437749-26-032856

    Oct 16, 2026

    3d ago

    View on EDGAR ↗
  • 8-K

    Submission of matters to a vote of security holders; Other events

    Items 5.07, 8.01, 9.01 · Accession 0001437749-26-032855

    Oct 16, 2026

    3d ago

    View on EDGAR ↗
  • DEFA14A

    Additional proxy soliciting material

    Accession 0001104659-26-115505

    Oct 14, 2026

    6d ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-115504

    Oct 14, 2026

    6d ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement

    Items 1.01, 3.02, 9.01 · Accession 0001104659-26-115500

    Oct 14, 2026

    6d ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-110424

    Sep 25, 2026

    25d ago

    View on EDGAR ↗
  • DEFM14A

    Definitive merger proxy statement

    Accession 0001104659-26-110234

    Sep 24, 2026

    25d ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-109977

    Sep 24, 2026

    26d ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-109671

    Sep 23, 2026

    27d ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-107735

    Sep 15, 2026

    1mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-104791

    Sep 3, 2026

    1mo ago

    View on EDGAR ↗
  • SCHEDULE 13G/A

    Amended beneficial ownership report (passive)

    Accession 0001346554-26-000069

    Aug 14, 2026

    2mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001437749-26-027710

    Aug 14, 2026

    2mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-088149

    Jul 30, 2026

    2mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-087145

    Jul 28, 2026

    2mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-083535

    Jul 15, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Other events

    Items 3.02, 8.01, 9.01 · Accession 0001104659-26-083534

    Jul 15, 2026

    3mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-077836

    Jun 26, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Other events

    Items 8.01, 9.01 · Accession 0001104659-26-077835

    Jun 26, 2026

    3mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-076805

    Jun 24, 2026

    3mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001437749-26-017077

    May 15, 2026

    5mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001104659-26-057352

    May 8, 2026

    5mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001437749-26-013969

    Apr 30, 2026

    5mo ago

    View on EDGAR ↗
  • 8-K

    Regulation FD disclosure

    Items 7.01, 9.01 · Accession 0001437749-26-013968

    Apr 30, 2026

    5mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001437749-26-013061

    Apr 23, 2026

    6mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001437749-26-012950

    Apr 22, 2026

    6mo ago

    View on EDGAR ↗
  • 8-K

    Regulation FD disclosure

    Items 7.01, 9.01 · Accession 0001437749-26-012949

    Apr 22, 2026

    6mo ago

    View on EDGAR ↗
  • 425

    Business-combination communication

    Accession 0001437749-26-012871

    Apr 21, 2026

    6mo ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement; Regulation FD disclosure

    Items 1.01, 3.02, 7.01, 9.01 · Accession 0001437749-26-012856

    Apr 21, 2026

    6mo ago

    View on EDGAR ↗
  • 10-K

    Annual report

    Accession 0001437749-26-006780

    Mar 4, 2026

    7mo ago

    View on EDGAR ↗

Pro

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Archimedes Tech SPAC Partners II Co.: questions answered

What is Archimedes Tech SPAC Partners II Co. (ATII)?

Archimedes Tech SPAC Partners II Co. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0002028516. It completed its initial public offering in Feb 2025, raising $225M in gross proceeds and listing on Nasdaq. Class A shares trade under the ticker ATII, units under ATIIU, warrants under ATIIW on Nasdaq. The vehicle is sponsored by Archimedes Tech through Archimedes Tech SPAC Sponsors II LLC. The mandate targets technology. Shareholders voted the combination through; closing is a matter of mechanics, and the redemption window has already run.

How much does Archimedes Tech SPAC Partners II Co. hold in trust?

Approximately $244,162,068, or about $10.62 per public share, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.

When must Archimedes Tech SPAC Partners II Co. complete a merger?

By Nov 12, 2026. If no combination closes by then the sponsor must seek a further extension or wind the vehicle up and return the trust.

What happens if Archimedes Tech SPAC Partners II Co. does not find a target in time?

The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.

Can I redeem shares in Archimedes Tech SPAC Partners II Co., and at what price?

Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date, most recently disclosed at about $10.62 per share. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.

What tickers does Archimedes Tech SPAC Partners II Co. trade under?

Class A shares trade as ATII on Nasdaq, the units as ATIIU, and the warrants as ATIIW. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.

Is the trust value the same as the share price for Archimedes Tech SPAC Partners II Co.?

No, and the gap between them is the whole trade. Trust per share is a disclosed, contractual figure of $10.62, being what a redeeming holder receives. The market price is whatever the shares change hands at: most recently $8.55, a discount of 19.54% to the redemption value. Quotes on this site are delayed and indicative; confirm on your own venue before trading.

How much dilution do Archimedes Tech SPAC Partners II Co.'s founder shares and warrants create?

Each unit also carried one-half warrant per unit, which is dilution deferred until exercise. Both are disclosed in the prospectus and both survive into the combined company, which is why a de-SPAC at $10 is not economically the same as an IPO at $10.

Who sponsors Archimedes Tech SPAC Partners II Co., and what is their track record?

Archimedes Tech SPAC Sponsors II LLC is the sponsor entity, part of the Archimedes Tech franchise. That franchise has launched 5 vehicles in total, of which 1 closed a combination and 0 liquidated, a 100% completion rate on resolved vehicles. Named principals: Eric R. Ball, Long Long, Stephen N. Cannon.

Which banks underwrote the Archimedes Tech SPAC Partners II Co. IPO?

BTIG. BTIG was credited as book-running manager on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.

Is Archimedes Tech SPAC Partners II Co. tradeable, and where?

Yes. ATII returned a live quote of $8.55 on Nasdaq. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.

Is Archimedes Tech SPAC Partners II Co. a good investment?

That is not a question this site answers. Archimedes Tech SPAC Partners II Co. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.

Where does this Archimedes Tech SPAC Partners II Co. data come from?

Filings Archimedes Tech SPAC Partners II Co. submitted to the SEC under CIK 0002028516: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.

Compiled by the SPACListing research desk

Last reconciled Oct 20, 2026

Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.