IRM

SEC source: 0001020569-22-000194 · wf-form4_166508716641322.xml · nonDerivative · entry 1

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 306,157

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 20, 2022.

SEC source: 0001020569-22-000192 · wf-form4_166500442578302.xml · derivative · entry 3

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 262,675

Underlying: Common Stock · 10,509 shares

Expires 2024-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This stock option, representing a right to purchase a total of 273,184 shares, is fully vested.

SEC source: 0001020569-22-000192 · wf-form4_166500442578302.xml · nonDerivative · entry 2

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 295,650

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 20, 2022.

SEC source: 0001020569-22-000192 · wf-form4_166500442578302.xml · nonDerivative · entry 1

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 306,159

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 20, 2022.

SEC source: 0001020569-22-000191 · wf-form4_166500436689350.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,554.447

Underlying: Common Stock · 988.633 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000190 · wf-form4_166500429863479.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,365.808

Underlying: Common Stock · 348.849 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000189 · wf-form4_166500420064429.xml · derivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,542.769

Underlying: Common Stock · 45.162 shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000188 · wf-form4_166500411153703.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 71,767.801

Underlying: Common Stock · 914.868 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000177 · wf-form4_166327398806776.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,282

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 11, 2022.

SEC source: 0001020569-22-000175 · wf-form4_166025152451824.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,407

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 11, 2022.

SEC source: 0001020569-22-000173 · wf-form4_166016613712967.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,355

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 19, 2022.

SEC source: 0001020569-22-000152 · wf-form4_165843812325695.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,016.959

Underlying: Common Stock · 690.354 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000150 · wf-form4_165834891072030.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 76,565.814

Underlying: Common Stock · 945.086 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

F3 · balance_after: Includes an additional 2.7236 Phantom Shares to reconcile total beneficial ownership from prior reported transactions.

SEC source: 0001020569-22-000147 · wf-form4_165834780695759.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,852.933

Underlying: Common Stock · 874.569 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

F3 · balance_after: Includes a reduction of -0.2488 Phantom Shares to reconcile total beneficial ownership from prior reported transactions.

SEC source: 0001020569-22-000146 · wf-form4_165834764906057.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,326.605

Underlying: Common Stock · 324.961 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

F3 · balance_after: Includes an additional 0.9474 Phantom Shares to reconcile total beneficial ownership from prior reported transactions.

SEC source: 0001020569-22-000145 · wf-form4_165834742823895.xml · derivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,497.607

Underlying: Common Stock · 43.173 shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

F3 · balance_after: Includes a reduction of -3.8214 Phantom Shares to reconcile total beneficial ownership from prior reported transactions.

SEC source: 0001020569-22-000139 · wf-form4_165791898623818.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,532

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 11, 2022.

SEC source: 0001020569-22-000133 · wf-form4_165532490221119.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,657

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 11, 2022.

SEC source: 0001020569-22-000135 · wf-form4_165532534186110.xml · nonDerivative · entry 1

Baker-Greene Edward · CIK 0001645452 · EVP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,152

F1 · shares: Shares acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0001020569-22-000137 · wf-form4_165532553791319.xml · nonDerivative · entry 1

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,540

F1 · shares: Shares acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0001020569-22-000130 · wf-form4_165291244207443.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,907

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person effective on May 28, 2021.

SEC source: 0001020569-22-000125 · wf-form4_165247565824431.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,978.6128

Underlying: Common Stock · 3,300 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

SEC source: 0001020569-22-000122 · wf-form4_165247520645923.xml · nonDerivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,910

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000124 · wf-form4_165247551225353.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,227

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000120 · wf-form4_165247495802536.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,000.6966

Underlying: Common Stock · 3,300 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

SEC source: 0001020569-22-000121 · wf-form4_165247509603141.xml · nonDerivative · entry 1

FORD MONTE E · CIK 0001085361 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,244

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000119 · wf-form4_165247479303009.xml · nonDerivative · entry 1

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,523,717

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000118 · wf-form4_165247466477056.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,436.1695

Underlying: Common Stock · 3,300 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 10, 2022, which RSUs vest on the grant date, 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.

SEC source: 0001020569-22-000117 · wf-form4_165247455423313.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,515

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000116 · wf-form4_165247438341970.xml · nonDerivative · entry 2

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,716

SEC source: 0001020569-22-000116 · wf-form4_165247438341970.xml · nonDerivative · entry 1

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,112

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000128 · wf-form4_165281984066784.xml · nonDerivative · entry 1

Murdock Wendy J. · CIK 0001670711 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,944

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 10, 2022. The RSUs vest on the grant date.

SEC source: 0001020569-22-000112 · wf-form4_165127083421339.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,700.6966

Underlying: Common Stock · 500.9837 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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 · derivative.underlying_shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares.

SEC source: 0001020569-22-000103 · wf-form4_165005715302251.xml · nonDerivative · entry 1

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,000

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of March 14, 2022.

SEC source: 0001020569-22-000098 · wf-form4_164972647909894.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,136.1695

Underlying: Common Stock · 786.8356 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000101 · wf-form4_164972683746796.xml · derivative · entry 4

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,458.2554

Underlying: Common Stock · 40.83 shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F5 · derivative.exercise_date: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F5 · derivative.expiration_date: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

SEC source: 0001020569-22-000100 · wf-form4_164972667356006.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,678.6128

Underlying: Common Stock · 725.4478 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000099 · wf-form4_164972659778930.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,199.7129

Underlying: Common Stock · 241.539 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001020569-22-000093 · wf-form4_164875929116202.xml · derivative · entry 3

Evens Deirdre · CIK 0001401237 · EVP & GM, Asset Lifestyle Mgmt

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 29,037 shares

Expires 2028-02-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This stock option, representing a right to purchase a total of 29,037 shares, is fully vested.

SEC source: 0001020569-22-000093 · wf-form4_164875929116202.xml · nonDerivative · entry 2

Evens Deirdre · CIK 0001401237 · EVP & GM, Asset Lifestyle Mgmt

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,687

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective August 27, 2021.

SEC source: 0001020569-22-000093 · wf-form4_164875929116202.xml · nonDerivative · entry 1

Evens Deirdre · CIK 0001401237 · EVP & GM, Asset Lifestyle Mgmt

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,724

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective August 27, 2021.

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · derivative · entry 7

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,596 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated Common Stock.

F7 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 25, 2019. Effective February 24, 2022, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on March 25, 2022.

F7 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 25, 2019. Effective February 24, 2022, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on March 25, 2022.

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · derivative · entry 6

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,596

Underlying: Common Stock · 5,596 shares

Expires not disclosed

F5 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated Common Stock.

F6 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 25, 2019 and fully vested on March 25, 2022.

F6 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 25, 2019 and fully vested on March 25, 2022.

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · derivative · entry 5

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,275 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 6,822 shares of Common Stock, were granted to the Reporting Person on March 25, 2019 and are fully vested.

F4 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 6,822 shares of Common Stock, were granted to the Reporting Person on March 25, 2019 and are fully vested.

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · nonDerivative · entry 4

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,155

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · nonDerivative · entry 3

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,150

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 25, 2019. Effective February 24, 2022, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on March 25, 2022.

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · nonDerivative · entry 2

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,554

SEC source: 0001020569-22-000091 · wf-form4_164859773579831.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, GM, Global RM

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,771

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 25, 2019.

SEC source: 0001020569-22-000089 · wf-form4_164703463976217.xml · nonDerivative · entry 3

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 295,650

F2 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of March 19,2021.

SEC source: 0001020569-22-000089 · wf-form4_164703463976217.xml · derivative · entry 4

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,115

Underlying: Common Stock · 2,115 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 6,345 shares of Common Stock, were granted to the Reporting Person on March 9, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 6,345 shares of Common Stock, were granted to the Reporting Person on March 9, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.