ARCI Archimedes Tech SPAC Partners III Co.

CIK 0002083910 4 ready 8-Ks latest May 1, 2026, 7:59 PM ET RSS · JSON

Activity: NORMAL 0 filings / 30d vs 0 baseline Risk accumulating: repeated leadership change (2)

Ready 8-Ks 4

Latest filing May 1, 2026, 7:59 PM ET

Top materiality 0.75

Event mix other_material ×3 · leadership ×1

Sentiment 0 pos · 0 neg · 4 neu

Executive change recent →

Recent 8-K filings for ARCI

Highest-materiality recent filing

Archimedes Tech SPAC III closes $276M IPO, deposits $276M in trust account

January 30, 2026, 6:59 PM ET other material materiality 0.75 neutral item 8.01 item 9.01

IPO of 27.6M units at $10.00/unit, including full over-allotment; gross proceeds $276M.
Private placement of 762K units at $10.00/unit to sponsor and BTIG; gross proceeds $7.62M.

Read filing →

May 1, 2026, 7:59 PM ET leadership materiality 0.55 neutral item 5.02 ◈ executive_change ×2

Archimedes Tech SPAC Partners III CEO Long resigns; Ben Landen appointed as CEO

Long Long resigned as CEO effective April 28, 2026; not due to disagreement with the Company.
March 10, 2026, 7:59 PM ET other material materiality 0.10 neutral item 8.01 item 9.01

Archimedes Tech SPAC units eligible for separate trading of shares and warrants on March 16

Separate trading of ordinary shares (ARCI) and warrants (ARCIW) begins March 16, 2026.
January 30, 2026, 6:59 PM ET other material materiality 0.75 neutral item 8.01 item 9.01

Archimedes Tech SPAC III closes $276M IPO, deposits $276M in trust account

IPO of 27.6M units at $10.00/unit, including full over-allotment; gross proceeds $276M.
January 27, 2026, 6:59 PM ET other material materiality 0.50 neutral item 1.01 item 3.02 item 5.03 item 8.01 item 9.01 ◈ Material Agreements ×9◈ Equity Issuances◈ Governance Changes

Archimedes Tech SPAC Partners III closes $276M IPO; units trade on Nasdaq

Raised $276M gross from 27.6M units at $10.00; over-allotment option fully exercised.

Executive changes

Appointed

Ben Landen

Chief Executive Officer

ARCI · Archimedes Tech SPAC Partners III Co.

Effective: 2026-04-28
Filed: May 1, 2026, 7:59 PM ET

On the same date, Ben Landen was appointed as the Chief Executive Officer by the Company’s board of directors, effective immediately.

Role change

Long Long

Chief Executive Officer

ARCI · Archimedes Tech SPAC Partners III Co.

Effective: 2026-04-28
Successor: Ben Landen
Filed: May 1, 2026, 7:59 PM ET

On April 28, 2026, Long Long notified the board of directors of Archimedes Tech SPAC Partners III Co. (the “Company”) of his resignation as Chief Executive Officer of the Company, effective immediately.

Materiality & sentiment trend

Max materiality 0.75 · Median 0.53 · Most common event other_material

0 positive 0 negative 4 neutral

source · ARCI on sec.gov