144 0001566391 XXXXXXXX LIVE 0001020569 IRON MOUNTAIN INC 001-13045 85 NEW HAMPSHIRE AVENUE, SUITE 150 PEASE INTERNATIONAL TRADEPORT PORTSMOUTH NH 03801 617-535-4781 Meaney William L Officer Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

10507 586605.81 291623270 06/07/2023 NYSE Common 06/07/2023 Options Granted - 02/13/2014 Issuer N 10507 06/07/2023 Cash N William Meaney

85 New Hampshire Avenue, Suite 150 Portsmouth NH 03801

Common 03/10/2023 11760 619164.00 William Meaney

85 New Hampshire Avenue, Suite 150 Portsmouth NH 03801

Common 04/13/2023 10507 567798.28 William Meaney

85 New Hampshire Avenue, Suite 150 Portsmouth NH 03801

Common 04/14/2023 10507 562649.85 William Meaney

85 New Hampshire Avenue, Suite 150 Portsmouth NH 03801

Common 05/22/2023 10507 581877.66 William Meaney

85 New Hampshire Avenue, Suite 150 Portsmouth NH 03801

Common 05/23/2023 10507 575153.18 William Meaney

85 New Hampshire Avenue Suite 150, Portsmouth NH 03801

Common 06/06/2023 10507 586080.46 06/07/2023 05/13/2022 /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William L Meaney