Long Long - 26 Jan 2026 Form 4 Insider Report for Archimedes Tech SPAC Partners III Co. (ARCI)

Reporting relationship: Chief Executive Officer, Director, 10%+ Owner
Issuer ticker: ARCI
Reported as of: 26 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 Jan 2026, 17:38:13 UTC
Prior SEC filing: 23 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Long Long

Key filing fact

Long Long filed Form 4 for Archimedes Tech SPAC Partners III Co. (ARCI) on 26 Jan 2026.

Key facts

This page summarizes Long Long's Form 4 filing for Archimedes Tech SPAC Partners III Co. (ARCI).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 26 Jan 2026, 17:38.

Change

Previous filing in this sequence was filed on 23 Jan 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001793151 Primary reporting owner

Long Long

Relationship: Chief Executive Officer, Director, 10%+ Owner
Address: 2093 PHILADELPHIA PIKE #1968, CLAYMONT
Signature: /s/ Long Long
Signature date: 26 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARCI transaction

Ordinary Shares

Purchase

Transaction value
Shares: +390,000
Change %
Price
Shares after: 390,000
Date: 26 Jan 2026
Ownership: See Footnote
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ARCI transaction Derivative

Warrants to purchase Ordinary Shares

Purchase

Transaction value
Shares: +97,500
Change %
Price
Shares after: 97,500
Date: 26 Jan 2026
Ownership: See Footnote
Underlying class: Ordinary Shares
Underlying amount: 97,500
Exercise price: $11.50
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Reflects the 390,000 private units owned by Archimedes Tech SPAC Sponsors III LLC, the Issuer's sponsor (the "Sponsor"). Each private unit consists of one ordinary share and one-fourth of one redeemable warrant, with each whole warrant entitling the holder thereof to purchase one ordinary share for $11.50 per share, subject to adjustment. The private units were purchased pursuant to a Private Units Purchase Agreement, dated January 22, 2026, by and between the Issuer and the Sponsor, at $10.00 per unit for an aggregate purchase price of $3,900,000. Long Long is the managing member of the Sponsor and has voting and dispositive power over the shares owned by the Sponsor. Mr. Long disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Footnote F2

The warrants included in the private units will become exercisable at the later of 12 months from the closing of the Issuer's initial public offering and 30 days after the completion of the Issuer's initial business combination and will expire five years after the completion of the initial business combination or earlier upon redemption or liquidation.