Insider at

04

Insider transactions

05
3 buys (P) 0 sells (S) Net: $351,219 + 32 non-open-market transactions below Avg return of open purchases vs now: -35.4% last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

32 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
April 28, 2026 AMST P 243,902 · · 243,902 Direct · Acquired (price as of 2026-10-06)
April 28, 2026 AMST P 243,902 · · 243,902 Direct · Acquired (price as of 2026-10-06)
April 28, 2026 AMST P 243,902 $1.44 $351,219 566,962 Direct +75.50% Acquired -35.4% (price as of 2026-10-06)
Jan. 7, 2025 AMST P 83,333 $3.00 $249,999 189,166 Direct +78.74% Acquired -69.0% (price as of 2026-10-06)
Nov. 19, 2021 AMST P 10,000 $1.30 $13,000 1,269,999 Direct +0.79% Acquired -94.0% (price as of 2026-10-06)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Sept. 30, 2026 AMST Restricted Stock Units Common Stock (12,121) · · 12,121 Acquired
June 30, 2026 AMST Restricted Stock Units Common Stock (9,023) · · 9,023 Acquired
April 28, 2026 AMST Series A-2 Warrants (right to buy) Common Stock (243,902) $1.44 Oct. 28, 2027 243,902 Acquired
April 28, 2026 AMST Series A-1 Warrants (right to buy) Common Stock (243,902) $1.44 April 28, 2031 243,902 Acquired
March 31, 2026 AMST Restricted Stock Units Common Stock (6,522) · · 6,522 Acquired
March 7, 2026 AMST Restricted Stock Units Common Stock (41,322) · · 41,322 Disposed
Feb. 6, 2026 AMST Restricted Stock Units Common Stock (49,751) · · 49,751 Acquired
Dec. 31, 2025 AMST Restricted Stock Units Common Stock (6,349) · · 6,349 Acquired
Sept. 30, 2025 AMST Restricted Stock Units Common Stock (3,934) · · 3,934 Acquired
June 30, 2025 AMST Restricted Stock Units Common Stock (4,461) · · 4,461 Acquired
March 31, 2025 AMST Restricted Stock Units Common Stock (4,959) · · 4,959 Acquired
March 7, 2025 AMST Restricted Stock Units Common Stock (41,322) · · 41,322 Acquired
Jan. 16, 2025 AMST Restricted Stock Units Common Stock (36,630) · · 36,630 Disposed
Dec. 31, 2024 AMST Restricted Stock Units Common Stock (2,526) · · 2,526 Acquired
Sept. 30, 2024 AMST Restricted Stock Units Common Stock (4,898) · · 4,898 Acquired
June 28, 2024 AMST Restricted Stock Units Common Stock (4,000) · · 4,000 Acquired
March 28, 2024 AMST Restricted Stock Units Common Stock (5,381) · · 5,381 Acquired
Jan. 16, 2024 AMST Restricted Stock Units Common Stock (36,630) · · 36,630 Acquired
Dec. 29, 2023 AMST Restricted Stock Units Common Stock (5,333) · · 5,333 Acquired
Sept. 29, 2023 AMST Restricted Stock Units Common Stock (4,706) · · 4,706 Acquired
June 30, 2023 AMST Restricted Stock Units Common Stock (3,324) · · 3,324 Acquired
March 31, 2023 AMST Restricted Stock Units Common Stock (14,620) · · 14,620 Disposed
March 31, 2023 AMST Restricted Stock Units Common Stock (4,598) · · 4,598 Acquired
Dec. 30, 2022 AMST Restricted Stock Units Common Stock (34,286) · · 34,286 Acquired
Sept. 30, 2022 AMST Restricted Stock Units Common Stock (24,896) · · 24,896 Acquired
June 30, 2022 AMST Restricted Stock Units Common Stock (13,043) · · 13,043 Acquired
March 31, 2022 AMST Restricted Stock Units Common Stock (10,526) · · 10,526 Acquired
March 31, 2022 AMST Restricted Stock Units Common Stock (42,105) · · 42,105 Acquired
March 31, 2022 AMST Restricted Stock Units Common Stock (175,439) · · 175,439 Acquired
Sept. 28, 2021 AMST Stock option (right to buy) Common Stock (51,102) $1.78 Sept. 27, 2031 51,102 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Nov. 30, 2020 AMST Common Stock 1,259,999 Direct