IRON MOUNTAIN INC — Director's Dealing 2019

Feb 21, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2019-02-19

Reporting Person: MacLean Theodore (EVP, Adjacent Businesses)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-02-19	Common Stock, par value $.01 per share	M	2054	—	Acquired	14419	Direct
2019-02-19	Common Stock, par value $.01 per share	F	603	$35.39	Disposed	13816	Direct
2019-02-19	Common Stock, par value $.01 per share	M	1620	—	Acquired	15436	Direct
2019-02-19	Common Stock, par value $.01 per share	F	476	$35.39	Disposed	14960	Direct
2019-02-19	Common Stock, par value $.01 per share	M	9473	—	Acquired	24433	Direct
2019-02-19	Common Stock, par value $.01 per share	F	2797	$35.39	Disposed	21636	Direct
2019-02-19	Common Stock, par value $.01 per share	S	395	$35.18	Disposed	21241	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-02-19	Restricted Stock Units	$	M	2054	Disposed		Common Stock (2054.0)	Direct
2019-02-19	Restricted Stock Units	$	M	1620	Disposed		Common Stock (1620.0)	Direct
2019-02-19	Performance Units	$	M	9473	Disposed		Common Stock (9473.0)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on February 18, 2016.

F2: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 16, 2017.

F3: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on February 18, 2016. Effective February 14, 2019, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on February 18, 2019.

F4: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of December 21, 2018.

F5: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F6: The RSUs, representing a contingent right to receive a total of 6,149 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and have vested in full.

F7: The RSUs, representing a contingent right to receive a total of 4,864 shares of Common Stock, were granted to the Reporting Person on February 16, 2017 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F8: Each PU represents a contingent right to receive one share of Common Stock.

F9: The PUs were initially granted to the Reporting Person on February 18, 2016. Effective February 14, 2019, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on February 18, 2019.