Insider at

04

Insider transactions

05
0 buys (P) 4 sells (S) Net: $-6,596,527 + 46 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

46 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Feb. 17, 2026 AMT S 10b5-1 2,086 $190.35 $397,070 106,569 Direct -1.92% Disposed -14.8% (price as of 2026-10-05)
Feb. 17, 2026 AMT S 10b5-1 9,596 $191.52 $1,837,826 96,973 Direct -9.00% Disposed -15.3% (price as of 2026-10-05)
Feb. 17, 2026 AMT S 10b5-1 22,658 $192.49 $4,361,438 74,315 Direct -23.37% Disposed -15.7% (price as of 2026-10-05)
Feb. 17, 2026 AMT S 10b5-1 1 $193.13 $193 74,314 Direct 0.00% Disposed -16.0% (price as of 2026-10-05)
Feb. 13, 2025 AMT S 10b5-1 1,517 $190.34 $288,746 62,792 Direct -2.36% Disposed -14.8% (price as of 2026-10-05)
Feb. 13, 2025 AMT S 10b5-1 15,051 $189.64 $2,854,272 64,309 Direct -18.97% Disposed -14.4% (price as of 2026-10-05)
Jan. 16, 2025 AMT S 10b5-1 2,276 $181.57 $413,253 62,792 Direct -3.50% Disposed -10.6% (price as of 2026-10-05)
Jan. 16, 2025 AMT S 10b5-1 14,291 $181.03 $2,587,100 65,068 Direct -18.01% Disposed -10.4% (price as of 2026-10-05)
March 6, 2024 AMT S 10b5-1 2,013 $206.44 $415,564 62,969 Direct -3.10% Disposed -21.4% (price as of 2026-10-05)
March 6, 2024 AMT S 10b5-1 9,497 $205.56 $1,952,203 64,982 Direct -12.75% Disposed -21.1% (price as of 2026-10-05)
March 1, 2024 AMT S 10b5-1 3,012 $198.69 $598,454 62,969 Direct -4.56% Disposed -18.3% (price as of 2026-10-05)
March 1, 2024 AMT S 10b5-1 5,303 $197.65 $1,048,138 65,981 Direct -7.44% Disposed -17.9% (price as of 2026-10-05)
March 1, 2024 AMT S 10b5-1 3,194 $196.75 $628,420 71,284 Direct -4.29% Disposed -17.5% (price as of 2026-10-05)
Aug. 17, 2023 AMT S 10b5-1 400 $178.78 $71,512 50,662 Direct -0.78% Disposed -9.2% (price as of 2026-10-05)
Aug. 17, 2023 AMT S 10b5-1 9,600 $178.11 $1,709,856 51,062 Direct -15.83% Disposed -8.9% (price as of 2026-10-05)
Aug. 10, 2023 AMT S 10b5-1 2,727 $187.17 $510,413 50,662 Direct -5.11% Disposed -13.3% (price as of 2026-10-05)
Aug. 3, 2023 AMT S 10b5-1 650 $189.62 $123,253 53,389 Direct -1.20% Disposed -14.4% (price as of 2026-10-05)
Aug. 3, 2023 AMT S 10b5-1 2,291 $188.94 $432,862 54,039 Direct -4.07% Disposed -14.1% (price as of 2026-10-05)
Aug. 3, 2023 AMT S 10b5-1 583 $188.00 $109,604 56,330 Direct -1.02% Disposed -13.7% (price as of 2026-10-05)
Jan. 17, 2023 AMT S 10b5-1 1,574 $233.92 $368,190 47,071 Direct -3.24% Disposed -30.6% (price as of 2026-10-05)
Jan. 9, 2023 AMT S 10b5-1 2,035 $220.85 $449,430 48,645 Direct -4.02% Disposed -26.5% (price as of 2026-10-05)
Dec. 14, 2022 AMT S 10b5-1 1,482 $222.72 $330,071 50,680 Direct -2.84% Disposed -27.1% (price as of 2026-10-05)
April 21, 2022 AMT S 10b5-1 25,389 $270.00 $6,855,030 52,398 Direct -32.64% Disposed -39.9% (price as of 2026-10-05)
Jan. 13, 2022 AMT S 10b5-1 3,956 $260.00 $1,028,560 48,448 Direct -7.55% Disposed -37.6% (price as of 2026-10-05)
June 1, 2021 AMT S 10b5-1 1,108 $256.64 $284,357 48,342 Direct -2.24% Disposed -36.8% (price as of 2026-10-05)
May 24, 2021 AMT S 10b5-1 1,533 $250.80 $384,476 49,450 Direct -3.01% Disposed -35.3% (price as of 2026-10-05)
May 10, 2021 AMT S 10b5-1 7,500 $250.00 $1,875,000 50,983 Direct -12.82% Disposed -35.1% (price as of 2026-10-05)
May 10, 2021 AMT S 10b5-1 4,120 $249.01 $1,025,921 58,483 Direct -6.58% Disposed -34.8% (price as of 2026-10-05)
May 10, 2021 AMT S 10b5-1 7,037 $248.21 $1,746,654 62,603 Direct -10.10% Disposed -34.6% (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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Feb. 17, 2026 AMT Option to Purchase Common Stock Common Stock (34,341) $94.71 March 10, 2026 34,341 Disposed
Feb. 13, 2025 AMT Option to Purchase Common Stock Common Stock (16,568) $94.57 March 10, 2025 16,568 Disposed
Jan. 16, 2025 AMT Option to Purchase Common Stock Common Stock (16,567) $94.57 March 10, 2025 16,567 Disposed
March 6, 2024 AMT Option to Purchase Common Stock Common Stock (11,510) $81.18 March 10, 2024 11,510 Disposed
March 1, 2024 AMT Option to Purchase Common Stock Common Stock (11,509) $81.18 March 10, 2024 11,509 Disposed
Aug. 17, 2023 AMT Option to Purchase Common Stock Common Stock (10,000) $81.18 March 10, 2024 10,000 Disposed
April 21, 2022 AMT Option to Purchase Common Stock Common Stock (25,389) $76.90 March 11, 2023 25,389 Disposed
Jan. 13, 2022 AMT Option to Purchase Common Stock Common Stock (3,956) $71.07 Oct. 1, 2022 3,956 Disposed
May 10, 2021 AMT Option to Purchase Common Stock Common Stock (17,232) $62.00 March 12, 2022 17,232 Disposed

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

Initial ownership (Form 3) 9 holdings

07

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

DateTickerSecuritySharesOwnership
Feb. 14, 2022 AMT Common Stock · Direct
Feb. 12, 2021 AMT Common Stock · Direct
March 26, 2020 AMT Common Stock · Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (17,232) 17,232 Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (3,956) 3,956 Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (25,389) 25,389 Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (33,019) 33,019 Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (33,135) 33,135 Direct
March 26, 2020 AMT Option to Purchase Common Stock→ Common Stock (34,341) 34,341 Direct