UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~January~~March 2610, 2026

Date of Report (Date of earliest event reported)

Archimedes Tech SPAC Partners III Co.

(Exact Name of Registrant as Specified in its Charter)

Cayman Islands		001-43071		N/A
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

2093 Philadelphia Pike #1968

Claymont, DE

19703

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code: (725) 312-2430

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Units, each consisting of one ordinary share, par value $0.0001 per share, and one-fourth of one redeemable warrant	ARCIU	The Nasdaq Stock Market LLC
Units, each consisting of one Ordinary Share, par value $0.0001 per share, and one-fourth of one redeemable Warrant	ARCIU	The Nasdaq Stock Market LLC
Ordinary Shares	ARCI	The Nasdaq Stock Market LLC
Warrants	ARCIW	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01. Other Events.

AsOn ~~previously~~March ~~disclosed on a Current Report on Form 8-K dated January 22~~10, 2026, Archimedes Tech SPAC Partners III Co. (the “Company”) ~~consummated~~announced ~~its~~that, ~~initial~~on ~~public~~or ~~offering~~about (March 16, 2026, the ~~“IPO”)~~holders of ~~27,600,000~~the Company’s units (the “Units”), ~~including~~may ~~the~~elect ~~exercise~~to inseparately ~~full~~trade by the ~~underwriters~~ordinary ofshares anand ~~option~~warrants toincluded ~~purchase~~in upthe ~~to 3,600,000~~ Units ~~to cover over-allotments~~. Each Unit consists of one ordinary share, ~~par value $0.0001 per share (“Ordinary Share”)~~ and one-fourth of one redeemable warrant. ~~(each,~~Any aUnits not separated will continue to trade on The Nasdaq Global Market (“~~Warrant~~Nasdaq”) ofunder the ~~Company,~~symbol ~~with~~“ARCIU.” ~~each~~Any ~~whole~~underlying ~~Warrant~~ordinary ~~entitling~~shares ~~the~~and ~~holder~~warrants ~~thereof~~that toare ~~purchase~~separated ~~one~~will ~~Ordinary~~trade on ~~Share~~Nasdaq ~~for~~under ~~$11.50~~the ~~per~~symbols ~~share~~“ARCI” ~~(subject~~and to“ARCIW,” ~~adjustment)~~respectively. ~~The~~Holders of Units ~~were~~will ~~sold~~need atto ahave ~~price~~their ofbrokers contact ~~$10.00~~Odyssey ~~per~~Transfer ~~Unit~~and Trust Company, ~~generating~~the ~~aggregate~~Company’s ~~gross~~transfer ~~proceeds~~agent, in order to separate the ~~Company~~holders’ ofUnits ~~$276,000,000~~into ordinary shares and warrants.

~~Simultaneously~~A ~~with~~copy ~~the closing~~ of the ~~IPO,~~press ~~the~~release issued ~~Company~~by ~~consummated a private placement (~~the ~~“Private Placement”) in which Archimedes Tech SPAC Sponsors III LLC, the~~ Company’s ~~sponsor,~~announcing ~~and BTIG, LLC,~~ the ~~representative~~separate trading of the ~~underwriters~~securities inunderlying the ~~initial~~Units ~~public~~is ~~offering,~~attached ~~purchased~~hereto anas ~~aggregate~~Exhibit ~~of 762,000 private units at a price of $10~~99.~~00 per unit, generating gross proceeds of $7,620,000~~1.

AsItem of9.01. ~~January~~Financial ~~26,~~Statements ~~2026, a total of $276,000,000 of the net proceeds from the IPO~~ and ~~the Private Placement were deposited in a trust account established for the benefit of the Company’s public shareholders~~Exhibits.

Item 9.01. Financial Statements and Exhibits.

Exhibit No.		Description

99.1		Press Release dated March 10, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

Exhibit No.		Description
99.1		Balance Sheet dated January 26, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

~~SIGNATURES~~Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

~~Pursuant~~Dated: toMarch ~~the requirements of the Securities Exchange Act of 1934~~10, ~~the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.~~2026

~~Dated~~ARCHIMEDES TECH SPAC PARTNERS III CO. By: ~~January~~/s/ ~~30,~~Long ~~2026~~Long Name: Long Long Title: Chief Executive Officer

ARCHIMEDES TECH SPAC PARTNERS III CO. By: /s/ Long Long Name: Long Long Title: Chief Executive Officer

Filing Compare · Archimedes Tech SPAC Partners III Co.