Ronald M Dykes

Insider

First SEC filing: Feb. 14, 2014 · Latest: Feb. 14, 2014

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.

Insider at

AMT selling Nov. 25, 2014

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 23 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

23 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 10, 2015	AMT	A	794	—	—	21,079 Direct	+3.91%	Acquired	(price as of 2026-08-21)
March 10, 2015	AMT	A	4,971	—	—	4,971 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 25, 2014	AMT	M	12,500	$42.95	$536,875	32,785 Direct	+61.62%	Acquired	311.4% (price as of 2026-08-21)
Nov. 25, 2014	AMT	S	12,500	$103.85	$1,298,125	20,285 Direct	-38.13%	Disposed	70.1% (price as of 2026-08-21)
Nov. 25, 2014	AMT	M	12,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Aug. 7, 2014	AMT	G	5,000	—	—	20,285 Direct	-19.77%	Disposed	(price as of 2026-08-21)
Aug. 6, 2014	AMT	P	2,900	$95.65	$277,385	25,285 Direct	+12.96%	Acquired	84.7% (price as of 2026-08-21)
March 10, 2014	AMT	A	924	—	—	22,385 Direct	+4.31%	Acquired	(price as of 2026-08-21)
March 10, 2014	AMT	A	5,054	—	—	5,054 Direct	—	Acquired	(price as of 2026-08-21)
March 14, 2013	AMT	A	5,500	$76.51	$420,805	23,663 Direct	+30.28%	Acquired	130.9% (price as of 2026-08-21)
March 11, 2013	AMT	A	813	—	—	18,163 Direct	+4.69%	Acquired	(price as of 2026-08-21)
March 11, 2013	AMT	A	3,239	—	—	3,239 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 30, 2012	AMT	M	12,500	$42.95	$536,875	29,850 Direct	+72.05%	Acquired	311.4% (price as of 2026-08-21)
Nov. 30, 2012	AMT	S	12,500	$75.00	$937,500	17,350 Direct	-41.88%	Disposed	135.6% (price as of 2026-08-21)
Nov. 30, 2012	AMT	M	12,500	—	—	12,500 Direct	-50.00%	Disposed	(price as of 2026-08-21)
March 12, 2012	AMT	A	1,009	—	—	17,350 Direct	+6.17%	Acquired	(price as of 2026-08-21)
March 12, 2012	AMT	A	3,590	—	—	3,590 Direct	—	Acquired	(price as of 2026-08-21)
March 10, 2011	AMT	A	1,231	—	—	16,341 Direct	+8.15%	Acquired	(price as of 2026-08-21)
March 10, 2011	AMT	A	3,653	—	—	3,653 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 9, 2010	AMT	P	5,000	$50.68	$253,400	15,110 Direct	+49.46%	Acquired	248.6% (price as of 2026-08-21)
Nov. 23, 2010	AMT	P	5,000	$51.00	$255,000	10,110 Direct	+97.85%	Acquired	246.4% (price as of 2026-08-21)
March 10, 2010	AMT	A	1,450	—	—	5,110 Direct	+39.62%	Acquired	(price as of 2026-08-21)
March 10, 2010	AMT	A	4,167	—	—	4,167 Direct	—	Acquired	(price as of 2026-08-21)
March 10, 2009	AMT	A	2,202	—	—	3,660 Direct	+151.03%	Acquired	(price as of 2026-08-21)
March 10, 2009	AMT	A	7,152	—	—	7,152 Direct	—	Acquired	(price as of 2026-08-21)
March 17, 2008	AMT	A	1,430	—	—	1,458 Direct	+5107.14%	Acquired	(price as of 2026-08-21)
March 17, 2008	AMT	A	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-21)
June 1, 2007	AMT	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)

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
March 10, 2015	AMT	Option to Purchase Common Stock [F2]	Common Stock (4,971)	$94.57	March 10, 2025	4,971	Acquired
Nov. 25, 2014	AMT	Option to Purchase Common Stock	Common Stock (12,500)	$42.95	June 1, 2017	12,500	Disposed
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
Nov. 30, 2012	AMT	Option to Purchase Common Stock	Common Stock (12,500)	$42.95	June 1, 2017	12,500	Disposed
March 12, 2012	AMT	Option to Purchase Common Stock [F2]	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
June 1, 2007	AMT	Option to Purchase Class A Common Stock [F2]	Class A Common Stock (25,000)	$42.95	June 1, 2017	25,000	Acquired

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