Samuels Theodore R. II 4

4 · IRON MOUNTAIN INC · Filed Jul 7, 2026

AI-generated summary of this filing

Updated Jul 7, 2026

Iron Mountain (IRM) Director Theodore Samuels Receives Phantom Stock Award

What Happened

Theodore R. Samuels II, a director of Iron Mountain Incorporated (IRM), was awarded 99.06 phantom shares on 2026-07-06 at an imputed price of $116.79 per share, for a total value of approximately $11,569. This filing reports a derivative acquisition (phantom stock), not an open-market purchase of common shares.

Key Details

Transaction date: 2026-07-06; Form 4 filed: 2026-07-07 (timely next-day filing).
Transaction type: Award/acquisition of phantom shares (code A, derivative).
Shares and value: 99.06 phantom shares at $116.79 each = ~$11,569.
Shares owned after transaction: Not disclosed in this Form 4.
Footnotes:
- F1: Phantom Shares are payable in common stock only upon the reporting person’s disability or upon cessation of service as a director; each Phantom Share equals the economic value of one common share.
- F2: The reported phantom shares reflect dividends treated as reinvested into additional Phantom Shares.
No 10b5-1 plan, sale, tax withholding, or late-filing flags are indicated.

Context

These phantom shares are a deferred compensation award and do not represent immediate ownership, voting rights, or shares available for sale. They become payable in actual Iron Mountain common stock only under the conditions described (disability or end of director service). For retail investors, awards like this are routine director compensation and are different from open-market purchases that might signal personal bullishness.

Form 4

Period: 2026-07-06

Director

Transactions

Award
Phantom Stock
[F1][F2]
2026-07-06$116.79/sh+99.06$11,569→ 13,800.33 total
→ Common Stock (99.06 underlying)

Footnotes (2)

[F1]Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.
[F2]These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

Signature

/s/ Keely Stewart, under Power of Attorney dated July 6, 2023 from Theodore R Samuels|2026-07-07

3 files