Form 4 for IRM Iron Mountain
Accepted 2026-03-03 00:00:00 ET · period of report 2026-03-01 · accession 0002045996-26-000004 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-03-03 | 2026-03-01 | IRM | Bhargava Mithu | EVP, GM Digital Business Unit | M - OptEx | $0.00 | +118.4K | 77.1K | New | $0 |
| DM | 2026-03-03 | 2026-03-01 | IRM | Bhargava Mithu | EVP, GM Digital Business Unit | F - Tax | $108.33 | -55.9K | 73.0K | -43% | -$6.06M |
| DM | 2026-03-03 | 2026-03-01 | IRM | Bhargava Mithu | EVP, GM Digital Business Unit | M - OptEx | $0.00 | -118.4K | 0 | -100% | $0 |
| D | 2026-03-03 | 2026-03-01 | IRM | Bhargava Mithu | EVP, GM Digital Business Unit | A - Grant | $0.00 | +9,692 | 9,692 | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock, par value $.01 per share | 2026-03-01 | M | A | 51,919 | $0.00 | 65,174 | D | — | — | (F1) This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 2 | Common | Common Stock, par value $.01 per share | 2026-03-01 | F | D | 25,102 | $108.33 | 40,072 | D | — | — | (F3) 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 PUs and does not represent a sale. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 3 | Common | Common Stock, par value $.01 per share | 2026-03-01 | M | A | 61,113 | $0.00 | 101,185 | D | — | — | (F4) This acquisition is reported to reflect the full vesting of PUs previously granted to the Reporting Person on July 3, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 4 | Common | Common Stock, par value $.01 per share | 2026-03-01 | F | D | 1,331 | $108.33 | 75,779 | D | — | — | (F6) 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. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 5 | Common | Common Stock, par value $.01 per share | 2026-03-01 | M | A | 2,663 | $0.00 | 75,643 | D | — | — | (F5) 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) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 6 | Common | Common Stock, par value $.01 per share | 2026-03-01 | F | D | 1,287 | $108.33 | 74,356 | D | — | — | (F6) 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. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 7 | Common | Common Stock, par value $.01 per share | 2026-03-01 | M | A | 2,754 | $0.00 | 77,110 | D | — | — | (F7) This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 8 | Common | Common Stock, par value $.01 per share | 2026-03-01 | F | D | 28,205 | $108.33 | 72,980 | D | — | — | (F3) 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 PUs and does not represent a sale. (F2) Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person. |
| 9 | Derivative | Restricted Stock Units | 2026-03-01 | M | D | 2,663 | $0.00 | 0 | D | — · — to — | 2,663 Common Stock, par value $.01 per share | (F11) Each RSU represents a contingent right to receive one share of Common Stock. (F12) The RSUs, representing a contingent right to receive a total of 7,987 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. |
| 10 | Derivative | Restricted Stock Units | 2026-03-01 | A | A | 9,692 | $0.00 | 9,692 | D | — · — to — | 9,692 Common Stock, par value $.01 per share | (F11) Each RSU represents a contingent right to receive one share of Common Stock. (F14) The RSUs, representing a contingent right to receive a total of 9,692 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. |
| 11 | Derivative | Restricted Stock Units | 2026-03-01 | M | D | 2,754 | $0.00 | 5,510 | D | — · — to — | 2,754 Common Stock, par value $.01 per share | (F11) Each RSU represents a contingent right to receive one share of Common Stock. (F13) The RSUs, representing a contingent right to receive a total of 8,264 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. |
| 12 | Derivative | Performance Units | 2026-03-01 | M | D | 51,919 | $0.00 | 0 | D | — · — to — | 51,919 Common Stock, par value $.01 per share | (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 March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026. |
| 13 | Derivative | Performance Units | 2026-03-01 | M | D | 61,113 | $0.00 | 0 | D | — · — to — | 61,113 Common Stock, par value $.01 per share | (F8) Each PU represents a contingent right to receive one share of Common Stock. (F10) The PUs were initially granted to the Reporting Person on July 3, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026. |