IRM

SEC source: 0001020569-22-000045 · wf-form4_164574683664403.xml · nonDerivative · entry 3

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,779

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 partial vesting of RSUs previously granted to the Reporting Person on February 20, 2019.

SEC source: 0001020569-22-000045 · wf-form4_164574683664403.xml · nonDerivative · entry 2

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,539

SEC source: 0001020569-22-000045 · wf-form4_164574683664403.xml · nonDerivative · entry 1

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,514

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 February 19, 2020.

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · derivative · entry 6

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,380 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").

F5 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 7,138 shares of Common Stock, were granted to the Reporting Person on February 20, 2019 and are fully vested.

F5 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 7,138 shares of Common Stock, were granted to the Reporting Person on February 20, 2019 and are fully vested.

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,438

Underlying: Common Stock · 4,438 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 13,313 shares of Common Stock, were granted to the Reporting Person on February 19, 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 13,313 shares of Common Stock, were granted to the Reporting Person on February 19, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,959

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,657

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 partial vesting of RSUs previously granted to the Reporting Person on February 20, 2019.

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,277

SEC source: 0001020569-22-000044 · wf-form4_164574652969312.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,641

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 February 19, 2020.

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · derivative · entry 6

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 467 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").

F5 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,399 shares of Common Stock, were granted to the Reporting Person on February 20, 2019 and are fully vested.

F5 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,399 shares of Common Stock, were granted to the Reporting Person on February 20, 2019 and are fully vested.

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · derivative · entry 5

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 533

Underlying: Common Stock · 532 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 1,597 shares of Common Stock, were granted to the Reporting Person on February 19, 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 1,597 shares of Common Stock, were granted to the Reporting Person on February 19, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · nonDerivative · entry 4

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 654

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · nonDerivative · entry 3

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 815

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 partial vesting of RSUs previously granted to the Reporting Person on February 20, 2019.

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · nonDerivative · entry 2

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 348

SEC source: 0001020569-22-000043 · wf-form4_164574641354464.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 532

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 February 19, 2020.

SEC source: 0001020569-22-000042 · wf-form4_164574631003182.xml · derivative · entry 3

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,545

Underlying: Common Stock · 7,544 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.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F3 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 22,633 shares of Common Stock, were granted to the Reporting Person on February 19, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 22,633 shares of Common Stock, were granted to the Reporting Person on February 19, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-22-000042 · wf-form4_164574631003182.xml · nonDerivative · entry 2

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,032

SEC source: 0001020569-22-000042 · wf-form4_164574631003182.xml · nonDerivative · entry 1

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,377

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 February 19, 2020.

SEC source: 0001020569-22-000020 · wf-form4_164254355506608.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,958.1739

Underlying: Common Stock · 610.2838 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: 0001020569-22-000018 · wf-form4_164212836155187.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,941

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

SEC source: 0001020569-22-000006 · wf-form4_164150484043834.xml · derivative · entry 3

Baker-Greene Edward · CIK 0001645452 · EVP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,446

Underlying: Common Stock · 8,722 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.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F3 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 26,168 shares of Common Stock, were granted to the Reporting Person on January 4, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 26,168 shares of Common Stock, were granted to the Reporting Person on January 4, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-22-000006 · wf-form4_164150484043834.xml · nonDerivative · entry 2

Baker-Greene Edward · CIK 0001645452 · EVP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,018

SEC source: 0001020569-22-000006 · wf-form4_164150484043834.xml · nonDerivative · entry 1

Baker-Greene Edward · CIK 0001645452 · EVP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,722

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 January 4, 2021.

SEC source: 0001020569-22-000016 · wf-form4_164186757821501.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,953.165

Underlying: Common Stock · 783.2779 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.

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

SEC source: 0001020569-22-000015 · wf-form4_164186750110051.xml · derivative · entry 1

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,518.2553

Underlying: Common Stock · 469.33 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.

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

SEC source: 0001020569-22-000014 · wf-form4_164186736448504.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,347.8901

Underlying: Common Stock · 253.5456 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.

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

SEC source: 0001020569-22-000013 · wf-form4_164186726793413.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,349.3339

Underlying: Common Stock · 849.5592 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.

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

SEC source: 0001020569-22-000012 · wf-form4_164186719109999.xml · derivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,258.4254

Underlying: Common Stock · 50.5744 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.

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

SEC source: 0001020569-22-000101 · wf-form4_164972683746796.xml · derivative · entry 3

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,417.4254

Underlying: Common Stock · 841 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.

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.

F3 · shares: Settlement of the Phantom Shares is in cash.

F4 · derivative.exercise_date: Settlement of the Phantom Shares is made in accordance with distribution elections made by the Reporting Person or as otherwise provided in the Plan.

F4 · derivative.expiration_date: Settlement of the Phantom Shares is made in accordance with distribution elections made by the Reporting Person or as otherwise provided in the Plan.

SEC source: 0001020569-22-000101 · wf-form4_164972683746796.xml · nonDerivative · entry 2

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,610

F2 · shares: Represents Common Stock otherwise issuable to the Reporting Person for which cash was paid, based on the closing price of Common Stock on the New York Stock Exchange on the transaction date.

SEC source: 0001020569-22-000101 · wf-form4_164972683746796.xml · nonDerivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,451

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 · 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.

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · derivative · entry 6

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,441

Underlying: Common Stock · 16,442 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.

F2 · 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 vest 50% on the second anniversary of the grant date and 50% on the third anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest 50% on the second anniversary of the grant date and 50% on the third anniversary of the grant date.

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · derivative · entry 5

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,442

Underlying: Common Stock · 16,442 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.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F3 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 49,325 shares of Common Stock, were granted to the Reporting Person on January 2, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 49,325 shares of Common Stock, were granted to the Reporting Person on January 2, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · nonDerivative · entry 4

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,833

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · nonDerivative · entry 3

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,125

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 January 2, 2020.

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · nonDerivative · entry 2

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,683

SEC source: 0001020569-22-000004 · wf-form4_164143649187206.xml · nonDerivative · entry 1

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,975

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 January 2, 2020.

SEC source: 0001020569-21-000262 · wf-form4_164081235031502.xml · derivative · entry 3

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 32,087 shares

Expires 2025-07-21

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_date: This stock option, representing a right to purchase a total of 32,087 shares, is fully vested.

SEC source: 0001020569-21-000262 · wf-form4_164081235031502.xml · nonDerivative · entry 2

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,203

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

F2 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $52.50 to $52.84, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

SEC source: 0001020569-21-000262 · wf-form4_164081235031502.xml · nonDerivative · entry 1

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,290

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: 0001020569-21-000263 · wf-form4_164081246967239.xml · derivative · entry 4

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 31,919 shares

Expires 2027-02-16

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 31,919 shares, is fully vested.

SEC source: 0001020569-21-000263 · wf-form4_164081246967239.xml · nonDerivative · entry 3

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,653

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

SEC source: 0001020569-21-000263 · wf-form4_164081246967239.xml · nonDerivative · entry 2

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,955

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

SEC source: 0001020569-21-000263 · wf-form4_164081246967239.xml · nonDerivative · entry 1

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,572

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 March 10, 2021.

SEC source: 0001020569-21-000259 · wf-form4_164005234679186.xml · derivative · entry 3

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 39,441 shares

Expires 2026-02-18

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_date: This stock option, representing a right to purchase a total of 39,441 shares, is fully vested.

SEC source: 0001020569-21-000259 · wf-form4_164005234679186.xml · nonDerivative · entry 2

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,203

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

F2 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $50.01 to $50.82, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

SEC source: 0001020569-21-000259 · wf-form4_164005234679186.xml · nonDerivative · entry 1

Evens Deirdre · CIK 0001401237 · EVP & GM, Rec and Info Mgmt NA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,644

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: 0001020569-21-000258 · wf-form4_164005226077407.xml · derivative · entry 3

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,859

Underlying: Common Stock · 23,716 shares

Expires 2029-02-20

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_date: This stock option, representing a right to purchase a total of 35,575 shares, became exercisable in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-21-000258 · wf-form4_164005226077407.xml · nonDerivative · entry 2

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,653

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

SEC source: 0001020569-21-000258 · wf-form4_164005226077407.xml · nonDerivative · entry 1

Tomovcsik John · CIK 0001595956 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,369

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 March 10, 2021.

F2 · balance_after: Includes 196 shares acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.