Gustavo Lara

Insider

First SEC filing: March 14, 2022 · Latest: March 14, 2022

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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 Feb. 1, 2019

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 58 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

58 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 10, 2022	AMT	A	881	—	—	12,530 Direct	+7.56%	Acquired	(price as of 2026-08-21)
March 10, 2021	AMT	F	15	$204.42	$3,066	11,649 Direct	-0.13%	Disposed	-13.6% (price as of 2026-08-21)
March 10, 2021	AMT	A	881	—	—	11,664 Direct	+8.17%	Acquired	(price as of 2026-08-21)
March 11, 2020	AMT	F	148	$232.90	$34,469	10,783 Direct	-1.35%	Disposed	-24.1% (price as of 2026-08-21)
March 10, 2020	AMT	A	739	—	—	10,931 Direct	+7.25%	Acquired	(price as of 2026-08-21)
March 12, 2019	AMT	F	188	$185.75	$34,921	10,192 Direct	-1.81%	Disposed	-4.9% (price as of 2026-08-21)
March 11, 2019	AMT	A	973	—	—	10,380 Direct	+10.34%	Acquired	(price as of 2026-08-21)
Feb. 1, 2019	AMT	S 10b5-1	2,517	$172.64	$434,535	9,940 Direct	-20.21%	Disposed	2.3% (price as of 2026-08-21)
Feb. 1, 2019	AMT	S 10b5-1	533	$173.03	$92,225	9,407 Direct	-5.36%	Disposed	2.1% (price as of 2026-08-21)
Jan. 18, 2019	AMT	S 10b5-1	3,050	$165.00	$503,250	12,457 Direct	-19.67%	Disposed	7.1% (price as of 2026-08-21)
March 12, 2018	AMT	A	1,241	—	—	15,507 Direct	+8.70%	Acquired	(price as of 2026-08-21)
March 10, 2018	AMT	F	198	$143.58	$28,429	14,266 Direct	-1.37%	Disposed	23.1% (price as of 2026-08-21)
March 15, 2017	AMT	M	3,653	$50.78	$185,499	18,117 Direct	+25.26%	Acquired	247.9% (price as of 2026-08-21)
March 15, 2017	AMT	M	3,590	$62.00	$222,580	21,707 Direct	+19.82%	Acquired	185.0% (price as of 2026-08-21)
March 15, 2017	AMT	M	3,239	$76.90	$249,079	24,946 Direct	+14.92%	Acquired	129.8% (price as of 2026-08-21)
March 15, 2017	AMT	M	5,054	$81.18	$410,284	30,000 Direct	+20.26%	Acquired	117.6% (price as of 2026-08-21)
March 15, 2017	AMT	M	4,971	$94.57	$470,107	34,971 Direct	+16.57%	Acquired	86.8% (price as of 2026-08-21)
March 15, 2017	AMT	S 10b5-1	20,507	$116.00	$2,378,812	14,464 Direct	-58.64%	Disposed	52.3% (price as of 2026-08-21)
March 15, 2017	AMT	M	3,653	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 15, 2017	AMT	M	3,590	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 15, 2017	AMT	M	3,239	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 15, 2017	AMT	M	5,054	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 15, 2017	AMT	M	4,971	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 10, 2017	AMT	A	1,321	—	—	14,701 Direct	+9.87%	Acquired	(price as of 2026-08-21)
March 10, 2017	AMT	F	237	$113.58	$26,918	14,464 Direct	-1.61%	Disposed	55.6% (price as of 2026-08-21)
March 10, 2016	AMT	A	1,584	—	—	13,380 Direct	+13.43%	Acquired	(price as of 2026-08-21)
March 10, 2015	AMT	A	794	—	—	11,953 Direct	+7.12%	Acquired	(price as of 2026-08-21)
March 10, 2015	AMT	F	157	$94.57	$14,847	11,796 Direct	-1.31%	Disposed	86.8% (price as of 2026-08-21)
March 10, 2015	AMT	A	4,971	—	—	4,971 Direct	—	Acquired	(price as of 2026-08-21)
March 10, 2014	AMT	A	924	—	—	11,159 Direct	+9.03%	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 11, 2013	AMT	A	813	—	—	10,235 Direct	+8.63%	Acquired	(price as of 2026-08-21)
March 11, 2013	AMT	A	3,239	—	—	3,239 Direct	—	Acquired	(price as of 2026-08-21)
June 14, 2012	AMT	M	7,123	$31.50	$224,374	16,545 Direct	+75.60%	Acquired	460.9% (price as of 2026-08-21)
June 14, 2012	AMT	M	10,000	$37.52	$375,200	26,545 Direct	+60.44%	Acquired	370.9% (price as of 2026-08-21)
June 14, 2012	AMT	M	5,000	$37.70	$188,500	31,545 Direct	+18.84%	Acquired	368.6% (price as of 2026-08-21)
June 14, 2012	AMT	M	7,152	$28.39	$203,045	38,697 Direct	+22.67%	Acquired	522.3% (price as of 2026-08-21)
June 14, 2012	AMT	M	4,167	$43.11	$179,639	42,864 Direct	+10.77%	Acquired	309.8% (price as of 2026-08-21)
June 14, 2012	AMT	S 10b5-1	33,442	$67.00	$2,240,614	9,422 Direct	-78.02%	Disposed	163.7% (price as of 2026-08-21)
June 14, 2012	AMT	M	7,123	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 14, 2012	AMT	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 14, 2012	AMT	M	5,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 14, 2012	AMT	M	7,152	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 14, 2012	AMT	M	4,167	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 11, 2012	AMT	M	2,877	$31.50	$90,626	12,299 Direct	+30.53%	Acquired	460.9% (price as of 2026-08-21)
June 11, 2012	AMT	S 10b5-1	2,877	$67.00	$192,759	9,422 Direct	-23.39%	Disposed	163.7% (price as of 2026-08-21)
June 11, 2012	AMT	M	2,877	—	—	7,123 Direct	-28.77%	Disposed	(price as of 2026-08-21)
March 12, 2012	AMT	A	1,009	—	—	9,422 Direct	+11.99%	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	—	—	8,413 Direct	+17.14%	Acquired	(price as of 2026-08-21)
March 10, 2011	AMT	A	3,653	—	—	3,653 Direct	—	Acquired	(price as of 2026-08-21)
March 10, 2010	AMT	A	1,450	—	—	7,182 Direct	+25.30%	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	—	—	5,732 Direct	+62.38%	Acquired	(price as of 2026-08-21)
March 10, 2009	AMT	A	7,152	—	—	7,152 Direct	—	Acquired	(price as of 2026-08-21)
June 13, 2008	AMT	M	5,000	$17.83	$89,150	8,530 Direct	+141.64%	Acquired	890.9% (price as of 2026-08-21)
June 13, 2008	AMT	S	3,700	$43.00	$159,100	4,830 Direct	-43.38%	Disposed	310.9% (price as of 2026-08-21)
June 13, 2008	AMT	S	1,100	$43.01	$47,311	3,730 Direct	-22.77%	Disposed	310.8% (price as of 2026-08-21)
June 13, 2008	AMT	S	100	$43.02	$4,302	3,630 Direct	-2.68%	Disposed	310.7% (price as of 2026-08-21)
June 13, 2008	AMT	S	100	$43.03	$4,303	3,530 Direct	-2.75%	Disposed	310.6% (price as of 2026-08-21)
June 13, 2008	AMT	M	5,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 17, 2008	AMT	A	1,430	—	—	3,530 Direct	+68.10%	Acquired	(price as of 2026-08-21)
March 17, 2008	AMT	A	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 3, 2007	AMT	M	20,000	$17.83	$356,600	22,100 Direct	+952.38%	Acquired	890.9% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	3,600	$45.22	$162,792	18,500 Direct	-16.29%	Disposed	290.7% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	1,100	$45.24	$49,764	17,400 Direct	-5.95%	Disposed	290.5% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	200	$45.25	$9,050	17,200 Direct	-1.15%	Disposed	290.5% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	100	$45.26	$4,526	17,100 Direct	-0.58%	Disposed	290.4% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	200	$45.27	$9,054	16,900 Direct	-1.17%	Disposed	290.3% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	1,301	$45.29	$58,922	15,599 Direct	-7.70%	Disposed	290.1% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	3,700	$45.30	$167,610	11,899 Direct	-23.72%	Disposed	290.0% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	1,200	$45.31	$54,372	10,699 Direct	-10.08%	Disposed	289.9% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	1,600	$45.32	$72,512	9,099 Direct	-14.95%	Disposed	289.8% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	5,099	$45.33	$231,138	4,000 Direct	-56.04%	Disposed	289.8% (price as of 2026-08-21)
Dec. 3, 2007	AMT	S 10b5-1	1,900	$45.34	$86,146	2,100 Direct	-47.50%	Disposed	289.7% (price as of 2026-08-21)
Dec. 3, 2007	AMT	M	20,000	—	—	5,000 Direct	-80.00%	Disposed	(price as of 2026-08-21)
March 15, 2007	AMT	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2006	AMT	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2005	AMT	P	2,100	$24.03	$50,463	2,100 Direct	—	Acquired	635.2% (price as of 2026-08-21)
Feb. 3, 2005	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 15, 2017	AMT	Option to Purchase Common Stock [F3]	Common Stock (3,653)	$50.78	March 10, 2021	3,653	Disposed
March 15, 2017	AMT	Option to Purchase Common Stock [F3]	Common Stock (3,590)	$62.00	March 12, 2022	3,590	Disposed
March 15, 2017	AMT	Option to Purchase Common Stock [F3]	Common Stock (3,239)	$76.90	March 11, 2023	3,239	Disposed
March 15, 2017	AMT	Option to Purchase Common Stock [F3]	Common Stock (5,054)	$81.18	March 10, 2024	5,054	Disposed
March 15, 2017	AMT	Option to Purchase Common Stock [F3]	Common Stock (4,971)	$94.57	March 10, 2025	4,971	Disposed
March 10, 2015	AMT	Option to Purchase Common Stock [F3]	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
June 14, 2012	AMT	Option to Purchase Common Stock	Common Stock (7,123)	$31.50	March 1, 2016	7,123	Disposed
June 14, 2012	AMT	Option to Purchase Common Stock	Common Stock (10,000)	$37.52	March 15, 2017	10,000	Disposed
June 14, 2012	AMT	Option to Purchase Common Stock	Common Stock (5,000)	$37.70	March 17, 2018	5,000	Disposed
June 14, 2012	AMT	Option to Purchase Common Stock	Common Stock (7,152)	$28.39	March 10, 2019	7,152	Disposed
June 14, 2012	AMT	Option to Purchase Common Stock	Common Stock (4,167)	$43.11	March 10, 2020	4,167	Disposed
June 11, 2012	AMT	Option to Purchase Common Stock	Common Stock (2,877)	$31.50	March 1, 2016	2,877	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
June 13, 2008	AMT	Option to Purchase Class A Common Stock [F1]	Class A Common Stock (5,000)	$17.83	Feb. 3, 2015	5,000	Disposed
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
Dec. 3, 2007	AMT	Option to Purchase Class A Common Stock [F2]	Class A Common Stock (20,000)	$17.83	Feb. 3, 2015	20,000	Disposed
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
March 1, 2006	AMT	Option to Purchase Class A Common Stock [F1]	Class A Common Stock (10,000)	$31.50	March 1, 2016	10,000	Acquired
Feb. 3, 2005	AMT	Option to purchase Class A Common Stock [F1]	Class A Common Stock (25,000)	$17.83	Feb. 3, 2015	25,000	Acquired

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