Insider at

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Insider transactions

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0 buys (P) 4 sells (S) Net: $-7,872,921 + 12 non-open-market transactions below 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

12 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 2, 2026 AMT S 10b5-1 5,242 $189.36 $992,625 65,559 Direct -7.40% Disposed -14.3% (price as of 2026-10-05)
March 2, 2026 AMT S 10b5-1 7,378 $190.29 $1,403,960 58,181 Direct -11.25% Disposed -14.7% (price as of 2026-10-05)
March 2, 2026 AMT S 10b5-1 21,604 $191.40 $4,135,006 36,577 Direct -37.13% Disposed -15.2% (price as of 2026-10-05)
March 2, 2026 AMT S 10b5-1 6,985 $192.03 $1,341,330 29,592 Direct -19.10% Disposed -15.5% (price as of 2026-10-05)
Sept. 10, 2024 AMT S 10b5-1 33,135 $240.00 $7,952,400 26,740 Direct -55.34% Disposed -32.4% (price as of 2026-10-05)

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.

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DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
March 2, 2026 AMT Option to Purchase Common Stock Common Stock (41,209) $94.71 March 10, 2026 41,209 Disposed
Sept. 10, 2024 AMT Option to Purchase Common Stock Common Stock (33,135) $94.57 March 10, 2025 33,135 Disposed

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

Initial ownership (Form 3) 3 holdings

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

DateTickerSecuritySharesOwnership
Nov. 8, 2023 AMT Common Stock · Direct
Nov. 8, 2023 AMT Option to Purchase Common Stock→ Common Stock (33,135) 33,135 Direct
Nov. 8, 2023 AMT Option to Purchase Common Stock→ Common Stock (41,209) 41,209 Direct

Compensation (DEF 14A)

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Matched by name from proxy statements (DEF 14A) — verify against the filing.

AMT

COO
Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2025 $628,269 · · · $897,750 · $55,250 $4,704,828

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.