IRM

SEC source: 0001104659-17-035799 · a4.xml · nonDerivative · entry 1

DENINGER PAUL F · CIK 0001190861 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,298

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 24, 2017. The RSUs vest on the grant date.

SEC source: 0001104659-17-035800 · a4.xml · nonDerivative · entry 1

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,012,677

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 24, 2017. The RSUs vest on the grant date.

SEC source: 0001104659-17-035797 · a4.xml · nonDerivative · entry 2

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,154

SEC source: 0001104659-17-035797 · a4.xml · nonDerivative · entry 1

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,581

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 24, 2017. The RSUs vest on the grant date.

SEC source: 0001104659-17-035796 · a4.xml · derivative · entry 1

ANTENUCCI TED R · CIK 0001244482 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,787.8761

Underlying: Common Stock · 3,879 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") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "Plan") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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: 0001104659-17-035795 · a4.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,699.6073

Underlying: Common Stock · 3,879 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") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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 (the "Plan") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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 "Plan") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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: 0001104659-17-035794 · a4.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,734.6801

Underlying: Common Stock · 3,879 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") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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 (the "Plan") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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 "Plan") with respect to certain restricted stock units ("RSUs") received on May 24, 2017, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of the Issuer's 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: 0001104659-17-035792 · a4.xml · nonDerivative · entry 1

Murdock Wendy J. · CIK 0001670711 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,227

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 24, 2017. The RSUs vest on the grant date.

F2 · balance_after: Includes 3,547 of the Issuer's CHESS Depository Interests ("CDIs"), trading on the Australian Securities Exchange. Each CDI represents a beneficial interest in one share of the Issuer's common stock.

SEC source: 0001104659-17-034671 · a4.xml · derivative · entry 2

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,798 shares

Expires 2017-05-23

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_date: This stock option, representing a right to purchase a total of 8,798 shares of Common Stock, is fully vested. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made in connection with the special distribution declared by the Board of Directors of Iron Mountain Incorporated on September 15, 2014 and paid on November 4, 2014.

SEC source: 0001104659-17-034671 · a4.xml · nonDerivative · entry 1

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,008,798

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.

SEC source: 0001104659-17-030756 · a4.xml · nonDerivative · entry 2

Bicks Edward · CIK 0001667756 · Sr VP & Chief Strategy Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 4,243

F1 · kind: This transaction is being reported to reflect the transfer of all of the Reporting Person's shares of Iron Mountain Incorporated common stock to The Edward T. Bicks Living Trust dated October 27, 2015 (the "Trust"), of which the Reporting Person is a co-trustee and of which the Reporting Person and the Reporting Person's wife and descendants are beneficiaries.

F2 · ownership.nature: Shares held by the Trust.

SEC source: 0001104659-17-030756 · a4.xml · nonDerivative · entry 1

Bicks Edward · CIK 0001667756 · Sr VP & Chief Strategy Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This transaction is being reported to reflect the transfer of all of the Reporting Person's shares of Iron Mountain Incorporated common stock to The Edward T. Bicks Living Trust dated October 27, 2015 (the "Trust"), of which the Reporting Person is a co-trustee and of which the Reporting Person and the Reporting Person's wife and descendants are beneficiaries.

SEC source: 0001104659-17-029500 · a4.xml · derivative · entry 5

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,798 shares

Expires 2017-05-23

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.

F4 · derivative.exercise_date: This stock option, representing a right to purchase a total of 8,798 shares of Common Stock, is fully vested. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made in connection with the Special Distribution.

SEC source: 0001104659-17-029500 · a4.xml · nonDerivative · entry 2

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 151,594

SEC source: 0001104659-17-029500 · a4.xml · nonDerivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 160,392

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 · balance_after: This amount reflects the correction of a minor rounding error with respect to the number of shares of Iron Mountain Incorporated common stock ("Common Stock") acquired by the Reporting Person on November 4, 2014 as a result of the Reporting Person's receipt of his pro rata portion of the special distribution declared by the Board of Directors of Iron Mountain Incorporated on September 15, 2014 and paid on November 4, 2014 (the "Special Distribution").

SEC source: 0001104659-17-022297 · a4.xml · derivative · entry 1

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,285.7982

Underlying: Common Stock · 672.7092 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 service 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 service on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares.

SEC source: 0001104659-17-021716 · a4.xml · derivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,144.3296

Underlying: Common Stock · 63.7715 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 ("Phantom Shares") are 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 ("Phantom Shares") are 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 ("Phantom Shares") are 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: 0001104659-17-021715 · a4.xml · derivative · entry 1

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,613.089

Underlying: Common Stock · 147.9226 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: 0001104659-17-021713 · a4.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,855.6801

Underlying: Common Stock · 397.8575 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: 0001104659-17-021712 · a4.xml · derivative · entry 1

ANTENUCCI TED R · CIK 0001244482 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,908.8761

Underlying: Common Stock · 383.2885 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: 0001104659-17-021710 · a4.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,820.6073

Underlying: Common Stock · 458.8685 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: 0001104659-17-021106 · a4.xml · derivative · entry 12

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,559

Underlying: Common Stock · 8,532 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.

F6 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of the Issuer's common stock ("Common Stock").

F8 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 25,623 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. In connection with the Reporting Person's resignation from the Issuer on March 31, 2017, the unvested portion of this RSU award became partially vested.

F8 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 25,623 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. In connection with the Reporting Person's resignation from the Issuer on March 31, 2017, the unvested portion of this RSU award became partially vested.

SEC source: 0001104659-17-021106 · a4.xml · derivative · entry 11

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,936 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.

F6 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of the Issuer's common stock ("Common Stock").

F7 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 5,794 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. In connection with the Reporting Person's resignation from the Issuer on March 31, 2017, the unvested portion of this RSU award became fully vested.

F7 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 5,794 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. In connection with the Reporting Person's resignation from the Issuer on March 31, 2017, the unvested portion of this RSU award became fully vested.

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 8

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,944

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 7

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,374

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 · shares: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 18, 2016.

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 6

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,842

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 5

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,951

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 restricted stock units ("RSUs") previously granted to the Reporting Person on February 19, 2015.

SEC source: 0001104659-17-016703 · a4.xml · derivative · entry 2

RUSSO FIDELMA · CIK 0001700118 · EVP, Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,636

Underlying: Common Stock · 32,636 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit ("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 32,636 shares of Common Stock, were granted to the Reporting Person on March 13, 2017 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 32,636 shares of Common Stock, were granted to the Reporting Person on March 13, 2017 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-016703 · a4.xml · derivative · entry 1

RUSSO FIDELMA · CIK 0001700118 · EVP, Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,910

Underlying: Common Stock · 36,910 shares

Expires 2027-03-13

F1 · derivative.exercise_date: This stock option becomes exercisable in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-016199 · a4.xml · derivative · entry 3

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,802

Underlying: Common Stock · 899 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 2,701 shares of Common Stock, were granted to the Reporting Person on March 9, 2016 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 2,701 shares of Common Stock, were granted to the Reporting Person on March 9, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-016199 · a4.xml · nonDerivative · entry 2

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,405

SEC source: 0001104659-17-016199 · a4.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,744

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 9, 2016.

SEC source: 0001104659-17-021106 · a4.xml · derivative · entry 10

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,783 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.

F1 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

F5 · derivative.exercise_date: This stock option, representing a right to purchase a total of 26,296 shares, is fully vested. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made in connection with the Special Distribution.

SEC source: 0001104659-17-021106 · a4.xml · derivative · entry 9

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,347 shares

Expires 2019-03-01

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 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

F4 · derivative.exercise_date: This stock option, representing a right to purchase a total of 113,451 shares, is fully vested. The number of stock options granted includes previously reported adjustments effective on October 18, 2012 made in connection with a special dividend declared by the Board of Directors of the Issuer and on September 26, 2014 made in connection with the special distribution declared by the Board of Directors of the Issuer (the "Special Distribution").

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 4

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,015

F1 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 3

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,114

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 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 2

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,331

F1 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

SEC source: 0001104659-17-021106 · a4.xml · nonDerivative · entry 1

Duale Marc A · CIK 0001396523 · President, Iron Mountain Int.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,385

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 · date: This report is being filed late due to an administrative error by a third party broker firm that is the administrator of this transaction.

SEC source: 0001104659-17-011365 · a4.xml · nonDerivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,511

F3 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of April 29, 2016.

SEC source: 0001104659-17-011369 · a4.xml · nonDerivative · entry 5

Tsolakis Anastasios · CIK 0001590872 · EVP, CIO, Global Svcs. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,009

F3 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 13, 2016.

SEC source: 0001104659-17-011374 · a4.xml · derivative · entry 3

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 559

Underlying: Common Stock · 557 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 1,673 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 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 1,673 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-011374 · a4.xml · nonDerivative · entry 2

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,845

SEC source: 0001104659-17-011374 · a4.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · Exec VP,Gen Counsel,Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,055

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, 2015.

SEC source: 0001104659-17-011370 · a4.xml · derivative · entry 6

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,697

Underlying: Common Stock · 2,844 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 8,541 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F5 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 8,541 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-011370 · a4.xml · derivative · entry 5

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,936

Underlying: Common Stock · 1,929 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 5,794 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 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 5,794 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-011370 · a4.xml · nonDerivative · entry 4

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,204

SEC source: 0001104659-17-011370 · a4.xml · nonDerivative · entry 3

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,211

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 18, 2016.

SEC source: 0001104659-17-011370 · a4.xml · nonDerivative · entry 2

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,367

SEC source: 0001104659-17-011370 · a4.xml · nonDerivative · entry 1

Sweeney Eileen · CIK 0001639163 · SVP & GM, Data Management

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,949

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, 2015.

SEC source: 0001104659-17-011365 · a4.xml · derivative · entry 7

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,134

Underlying: Common Stock · 25,028 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F6 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 75,162 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F6 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 75,162 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.