Altamura Michelle Vervais 4
4 · IRON MOUNTAIN INC · Filed Mar 3, 2026
Insider Transaction Report
Form 4
Altamura Michelle Vervais
EVP, General Counsel, Sec.
Transactions
- Exercise/Conversion
Common Stock, par value $.01 per share
[F1]2026-03-01+1,458→ 7,210 total - Tax Payment
Common Stock, par value $.01 per share
[F2]2026-03-01$108.33/sh−486$52,648→ 6,724 total - Exercise/Conversion
Common Stock, par value $.01 per share
[F3]2026-03-01+432→ 7,156 total - Tax Payment
Common Stock, par value $.01 per share
[F2]2026-03-01$108.33/sh−144$15,600→ 7,012 total - Exercise/Conversion
Common Stock, par value $.01 per share
[F4]2026-03-01+1,073→ 8,085 total - Tax Payment
Common Stock, par value $.01 per share
[F2]2026-03-01$108.33/sh−357$38,674→ 7,728 total - Exercise/Conversion
Restricted Stock Units
[F5][F6]2026-03-01−1,458→ 0 total→ Common Stock, par value $.01 per share (1,458 underlying) - Exercise/Conversion
Restricted Stock Units
[F5][F7]2026-03-01−432→ 432 total→ Common Stock, par value $.01 per share (432 underlying) - Exercise/Conversion
Restricted Stock Units
[F5][F8]2026-03-01−1,073→ 2,146 total→ Common Stock, par value $.01 per share (1,073 underlying)
Footnotes (8)
- [F1]This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.
- [F2]Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.
- [F3]This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2024.
- [F4]This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025.
- [F5]Each RSU represents a contingent right to receive one share of Common Stock.
- [F6]The RSUs, representing a contingent right to receive a total of 4,374 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
- [F7]The RSUs, representing a contingent right to receive a total of 1,295 shares of Common Stock, were granted to the Reporting Person on March 1, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
- [F8]The RSUs, representing a contingent right to receive a total of 3,219 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
Signature
/s/ Christine Zhang, under Power of Attorney dated September 17, 2024, from Michelle Altamura|2026-03-03