Mark Kearns

Insider

First SEC filing: Oct. 8, 2010 · Latest: Oct. 8, 2010

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 5 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

No open-market trades on record; showing all filings.

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 1, 2011	AMT	M	1,177	—	—	1,177 Direct	—	Acquired	(price as of 2026-08-19)
June 1, 2011	AMT	F	374	$54.13	$20,245	803 Direct	-31.78%	Disposed	222.6% (price as of 2026-08-19)
June 1, 2011	AMT	M	1,177	—	—	3,530 Direct	-25.01%	Disposed	(price as of 2026-08-19)
March 10, 2011	AMT	A	11,690	—	—	11,690 Direct	—	Acquired	(price as of 2026-08-19)
March 10, 2011	AMT	A	3,939	—	—	3,939 Direct	—	Acquired	(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.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
June 1, 2011	AMT	Restricted Stock Units	Class A Common Stock (1,177)	—	—	1,177	Disposed
March 10, 2011	AMT	Option to Purchase Class A Common Stock	Class A Common Stock (11,690)	$50.78	March 10, 2021	11,690	Acquired
March 10, 2011	AMT	Restricted Stock Units	Class A Common Stock (3,939)	—	—	3,939	Acquired

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

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

Date	Ticker	Security	Shares	Ownership
Oct. 8, 2010	AMT	Option to purchase Class A Common Stock→ Class A Common Stock (13,667)	13,667	Direct
Oct. 8, 2010	AMT	Restricted Stock Units→ Class A Common Stock (4,707)	4,707	Direct