MEANEY WILLIAM L (President and CEO) sold 31.7% of their position (137.13K shares) of IRON MOUNTAIN INC on the open market

Open‑market sale worth $15.00M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 9 sales

MEANEY WILLIAM L

Filed: 3/3/2026ACC: 0001566391-26-000008

InsiderMEANEY WILLIAM LCIK 1566391

→

IssuerIRON MOUNTAIN INCCIK 1020569

DirectorOfficer· President and CEO

Since Mar 2026

-319.10K

Net shares

Net seller

$42.74M

Total sold

Open market trades

0B · 9S

Total transactions

763.22K acquired · 1.08M disposed

Non-Derivative Transactions12

Common Stock, par value $.01 per share

Direct

M · Option Exercise

+650.67K

Price / share

—

Trade value

—

% of position

New position

3/1/2026

0.00→650.67K

Common Stock, par value $.01 per share

Direct

F · Tax Withholding

−256.04K

Price / share

$108.33

Trade value

$27.74M

% of position

39.3%

3/1/2026

650.67K→394.63K

Common Stock, par value $.01 per share

Direct

S · Sale

−2.93K

Price / share

$107.16

Trade value

$313.87K

% of position

0.7%

3/2/2026

394.63K→391.70K

Common Stock, par value $.01 per share

Direct

S · Sale

−13.78K

Price / share

$108.27

Trade value

$1.49M

% of position

3.5%

3/2/2026

391.70K→377.93K

Common Stock, par value $.01 per share

Direct

S · Sale

−37.30K

Price / share

$109.07

Trade value

$4.07M

% of position

9.9%

3/2/2026

377.93K→340.63K

Common Stock, par value $.01 per share

Direct

S · Sale

−41.46K

Price / share

$110.05

Trade value

$4.56M

% of position

12.2%

3/2/2026

340.63K→299.18K

Common Stock, par value $.01 per share

Direct

S · Sale

−3.20K

Price / share

$110.74

Trade value

$354.37K

% of position

1.1%

3/2/2026

299.18K→295.98K

Common Stock, par value $.01 per share

Direct

M · Option Exercise

+38.47K

Price / share

$37.00

Trade value

$1.42M

% of position

13.0%

3/2/2026

295.98K→334.45K

Common Stock, par value $.01 per share

Direct

S · Sale

−2.08K

Price / share

$107.95

Trade value

$224.10K

% of position

0.6%

3/2/2026

334.45K→332.37K

Common Stock, par value $.01 per share

Direct

S · Sale

−16.46K

Price / share

$108.91

Trade value

$1.79M

% of position

5.0%

3/2/2026

332.37K→315.92K

Common Stock, par value $.01 per share

Direct

S · Sale

−18.12K

Price / share

$110.02

Trade value

$1.99M

% of position

5.7%

3/2/2026

315.92K→297.80K

Common Stock, par value $.01 per share

Direct

S · Sale

−1.82K

Price / share

$110.64

Trade value

$201.81K

% of position

0.6%

3/2/2026

297.80K→295.98K

Total

Net shares

+295.98K

Net value

-$41.31M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock, par value $.01 per share Direct	3/1/2026	M · Option Exercise	+650.67K	—	—	New position	0.00	650.67K
Common Stock, par value $.01 per share Direct	3/1/2026	F · Tax Withholding	−256.04K	$108.33	$27.74M	39.3%	650.67K	394.63K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−2.93K	$107.16	$313.87K	0.7%	394.63K	391.70K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−13.78K	$108.27	$1.49M	3.5%	391.70K	377.93K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−37.30K	$109.07	$4.07M	9.9%	377.93K	340.63K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−41.46K	$110.05	$4.56M	12.2%	340.63K	299.18K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−3.20K	$110.74	$354.37K	1.1%	299.18K	295.98K
Common Stock, par value $.01 per share Direct	3/2/2026	M · Option Exercise	+38.47K	$37.00	$1.42M	13.0%	295.98K	334.45K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−2.08K	$107.95	$224.10K	0.6%	334.45K	332.37K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−16.46K	$108.91	$1.79M	5.0%	332.37K	315.92K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−18.12K	$110.02	$1.99M	5.7%	315.92K	297.80K
Common Stock, par value $.01 per share Direct	3/2/2026	S · Sale	−1.82K	$110.64	$201.81K	0.6%	297.80K	295.98K
Total			+295.98K		-$41.31M

Derivative Transactions3

Performance Units

Direct

M · Option Exercise

Converts to

Common Stock, par value $.01 per share

650.67K shares

−650.67K

Strike price

Held after

0.00

Exercisable

—

3/1/2026

Employee Stock Option (Right to Buy)

Direct

A · Award

Converts to

Common Stock, par value $.01 per share

74.07K shares

+74.07K

Strike price

108.33

Held after

74.07K

Exercisable

—

3/1/2026

Employee Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock, par value $.01 per share

38.47K shares

−38.47K

Strike price

Held after

346.27K

Exercisable

—

3/2/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Performance Units Direct	Common Stock, par value $.01 per share650.67K shares	3/1/2026	M · Option Exercise	−650.67K		—	0.00
Employee Stock Option (Right to Buy) Direct	Common Stock, par value $.01 per share74.07K shares	3/1/2026	A · Award	+74.07K	108.33	—	74.07K
Employee Stock Option (Right to Buy) Direct	Common Stock, par value $.01 per share38.47K shares	3/2/2026	M · Option Exercise	−38.47K	37	—	346.27K

Non-Derivative Holdings (Post-Transaction)2

Common Stock, par value $.01 per share

Indirect

Shares owned82.97K

Common Stock, par value $.01 per share

Indirect

Shares owned212.68K

Total

295.65K indirect295.65K

Security Title	Shares Owned	Ownership Type
Common Stock, par value $.01 per share	82.97K	Indirect
Common Stock, par value $.01 per share	212.68K	Indirect
Total	295.65K	295.65K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported