David E Sharbutt

CIK 1179725 · View on SEC EDGAR ↗

Insider

First SEC filing: March 14, 2023 · Latest: March 14, 2023

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Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 50 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

50 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Sept. 3, 2021 AMT S 739 $300.71 $222,225 905 Direct -44.95% Disposed -41.9% (price as of 2026-08-19)
Aug. 23, 2021 AMT S 2,400 $290.00 $696,000 1,644 Direct -59.35% Disposed -39.8% (price as of 2026-08-19)
Sept. 14, 2020 AMT S 973 $255.27 $248,378 763 Direct -56.05% Disposed -31.6% (price as of 2026-08-19)
June 15, 2020 AMT S 900 $258.92 $233,028 1,736 Direct -34.14% Disposed -32.5% (price as of 2026-08-19)
Feb. 27, 2020 AMT S 2,200 $243.60 $535,920 1,897 Direct -53.70% Disposed -28.3% (price as of 2026-08-19)
Aug. 8, 2019 AMT S 2,039 $217.59 $443,666 1,897 Direct -51.80% Disposed -19.7% (price as of 2026-08-19)
May 16, 2019 AMT S 1,200 $202.46 $242,952 1,897 Direct -38.75% Disposed -13.7% (price as of 2026-08-19)
May 8, 2019 AMT S 2,035 $192.15 $391,025 1,897 Direct -51.75% Disposed -9.1% (price as of 2026-08-19)
March 1, 2019 AMT S 1,009 $174.49 $176,060 2,959 Direct -25.43% Disposed 0.1% (price as of 2026-08-19)
Nov. 14, 2018 AMT S 813 $160.88 $130,795 3,968 Direct -17.00% Disposed 8.6% (price as of 2026-08-19)
Nov. 7, 2018 AMT S 3,590 $157.06 $563,845 4,781 Direct -42.89% Disposed 11.2% (price as of 2026-08-19)
Aug. 3, 2018 AMT S 1,321 $150.48 $198,784 4,781 Direct -21.65% Disposed 16.1% (price as of 2026-08-19)
Dec. 13, 2017 AMT S 1,584 $144.44 $228,793 4,861 Direct -24.58% Disposed 20.9% (price as of 2026-08-19)
May 18, 2017 AMT S 3,653 $128.61 $469,812 6,445 Direct -36.18% Disposed 35.8% (price as of 2026-08-19)
May 5, 2017 AMT S 4,167 $127.77 $532,418 6,445 Direct -39.27% Disposed 36.7% (price as of 2026-08-19)
June 7, 2016 AMT S 5,000 $108.14 $540,700 5,124 Direct -49.39% Disposed 61.5% (price as of 2026-08-19)
May 23, 2016 AMT S 10,000 $104.35 $1,043,500 5,124 Direct -66.12% Disposed 67.4% (price as of 2026-08-19)
March 11, 2016 AMT S 12,500 $95.78 $1,197,250 5,124 Direct -70.93% Disposed 82.3% (price as of 2026-08-19)
March 12, 2012 AMT S 19,652 $62.05 $1,219,407 6,313 Direct -75.69% Disposed 181.5% (price as of 2026-08-19)
March 12, 2012 AMT S 6,313 $62.12 $392,164 0 Direct -100.00% Disposed 181.1% (price as of 2026-08-19)

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.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
Aug. 23, 2021 AMT Option to Purchase Common Stock [F1] Common Stock (2,400) $81.18 March 10, 2024 2,400 Disposed
Feb. 27, 2020 AMT Option to Purchase Common Stock [F2] Common Stock (2,200) $81.18 March 10, 2024 2,200 Disposed
Aug. 8, 2019 AMT Option to Purchase Common Stock [F1] Common Stock (2,039) $76.90 March 11, 2023 2,039 Disposed
May 16, 2019 AMT Option to Purchase Common Stock [F1] Common Stock (1,200) $76.90 March 11, 2023 1,200 Disposed
Nov. 7, 2018 AMT Option to Purchase Common Stock [F1] Common Stock (3,590) $62.00 March 12, 2022 3,590 Disposed
May 18, 2017 AMT Option to Purchase Common Stock [F2] Common Stock (3,653) $50.78 March 10, 2021 3,653 Disposed
May 5, 2017 AMT Option to Purchase Common Stock [F2] Common Stock (4,167) $43.11 March 10, 2020 4,167 Disposed
June 7, 2016 AMT Option to purchase common stock Common Stock (5,000) $37.70 March 17, 2018 5,000 Disposed
May 23, 2016 AMT Option to Purchase Common Stock Common Stock (10,000) $37.52 March 15, 2017 10,000 Disposed
March 11, 2016 AMT Option to Purchase Common Stock Common Stock (12,500) $35.72 Sept. 1, 2016 12,500 Disposed
March 10, 2015 AMT Option to Purchase Common Stock [F2] Common Stock (4,971) $94.57 March 10, 2025 4,971 Acquired
March 10, 2014 AMT Option to Purchase Common Stock [F2] Common Stock (5,054) $81.18 March 10, 2024 5,054 Acquired
March 11, 2013 AMT Option to Purchase Common Stock [F2] Common Stock (3,239) $76.90 March 11, 2023 3,239 Acquired
March 12, 2012 AMT Option to Purchase Common Stock Common Stock (12,500) $35.72 Sept. 1, 2016 12,500 Disposed
March 12, 2012 AMT Option to Purchase Common Stock Common Stock (7,152) $28.39 March 10, 2019 7,152 Disposed
March 12, 2012 AMT Option to Purchase Common Stock [F4] Common Stock (3,590) $62.00 March 12, 2022 3,590 Acquired
March 10, 2011 AMT Option to Purchase Class A Common Stock [F2] Class A Common Stock (3,653) $50.78 March 10, 2021 3,653 Acquired
March 10, 2010 AMT Option to Purchase Class A Common Stock [F2] Class A Common Stock (4,167) $43.11 March 10, 2020 4,167 Acquired
March 10, 2009 AMT Option to Purchase Class A Common Stock [F2] Class A Common Stock (7,152) $28.39 March 10, 2019 7,152 Acquired
March 17, 2008 AMT Option to purchase Class A Common Stock [F2] Class A Common Stock (5,000) $37.70 March 17, 2018 5,000 Acquired
March 15, 2007 AMT Option to Purchase Class A Common Stock [F1] Class A Common Stock (10,000) $37.52 March 15, 2017 10,000 Acquired
Sept. 1, 2006 AMT Option to purchase Class A Common Stock [F1] Class A Common Stock (25,000) $35.72 Sept. 1, 2016 25,000 Acquired

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