IRON MOUNTAIN INC — Director's Dealing 2023

Mar 2, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2023-03-01

Reporting Person: MARSON DEBORAH (EVP, General Counsel, Sec.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-03-01	Common Stock, par value $.01 per share	M	6526	—	Acquired	65945	Direct
2023-03-01	Common Stock, par value $.01 per share	F	2740	$52.58	Disposed	63205	Direct
2023-03-01	Common Stock, par value $.01 per share	M	1845	—	Acquired	65050	Direct
2023-03-01	Common Stock, par value $.01 per share	F	774	$52.58	Disposed	64276	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-03-01	Restricted Stock Units	$	M	6526	Disposed		Common Stock (6526.0)	Direct
2023-03-01	Restricted Stock Units	$	M	1845	Disposed		Common Stock (1845.0)	Direct
2023-03-01	Restricted Stock Units	$	A	6418	Acquired		Common Stock (6418.0)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2021.

F2: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2022.

F3: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4: The RSUs, representing a contingent right to receive a total of 19,579 shares of Common Stock, were granted to the Reporting Person on March 1, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F5: The RSUs, representing a contingent right to receive a total of 5,536 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F6: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.