Derivative exercise or conversion — not an open-market buy.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Jan 21, 2026
Reporting period
Not applicable
Filed with the SEC
Jan 23, 2026
DirectorOption exercise
Context
Classification
option exercise
Code M — exercise or conversion of a derivative security
Planned / mechanical clue
None found in footnotes
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001781215-26-000006
Filed / recorded
Jan 23, 2026, 3:05 AM UTC
Added to OQRO
Oct 2, 2026, 12:28 PM UTC
Parser
form4-xml-v1
Data quality
Verified: identifiers matched exactly
Issuer
IRON MOUNTAIN INC
Issuer CIK
1020569
Ticker
IRM
Reporting person
Robin Matlock
Relationship
Director
Security
Phantom Stock
Table
Derivative (Table II)
Transaction date
Jan 21, 2026
Transaction code
M
Shares / units
10.189
Price per share
$0.00
Acquired / disposed
Disposed (D)
Shares owned after
0
Ownership form
Direct
Amendment
No
Footnotes from the filing
Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "Plan"), the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") on various dates selected by the Reporting Person or as otherwise provided in the Plan. Each Phantom Share is the economic equivalent of one share of Common Stock.
Settlement of the Phantom Shares is in Common Stock
