IRM

SEC source: 0001104659-18-010893 · a4.xml · derivative · entry 3

Kidd Mark · CIK 0001732058 · SVP, GM Data Centers

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,605

Underlying: Common Stock · 63,605 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010892 · a4.xml · derivative · entry 4

Keddy Patrick J · CIK 0001346840 · EVP & Gen. Mgr, NA & West Euro

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,676

Underlying: Common Stock · 10,676 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010892 · a4.xml · derivative · entry 3

Keddy Patrick J · CIK 0001346840 · EVP & Gen. Mgr, NA & West Euro

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,778

Underlying: Common Stock · 49,778 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010890 · a4.xml · derivative · entry 5

MacLean Theodore · CIK 0001620953 · EVP, Adjacent Businesses

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,338

Underlying: Common Stock · 5,338 shares

Expires not disclosed

F4 · 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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F5 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010890 · a4.xml · derivative · entry 4

MacLean Theodore · CIK 0001620953 · EVP, Adjacent Businesses

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,889

Underlying: Common Stock · 24,889 shares

Expires 2028-02-15

F3 · 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: 0001104659-18-010890 · a4.xml · nonDerivative · entry 1

MacLean Theodore · CIK 0001620953 · EVP, Adjacent Businesses

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,839

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 7, 2017.

SEC source: 0001104659-18-010889 · a4.xml · derivative · entry 4

Cloutier Ernest W · CIK 0001291613 · EVP & Gen. Mgr, Int'l

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,672

Underlying: Common Stock · 6,672 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010889 · a4.xml · derivative · entry 3

Cloutier Ernest W · CIK 0001291613 · EVP & Gen. Mgr, Int'l

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,111

Underlying: Common Stock · 31,111 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010888 · a4.xml · derivative · entry 4

Tomovcsik John · CIK 0001595956 · EVP, G. Mgr., Rec. & Inf. Mgmt

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,227

Underlying: Common Stock · 6,227 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010888 · a4.xml · derivative · entry 3

Tomovcsik John · CIK 0001595956 · EVP, G. Mgr., Rec. & Inf. Mgmt

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,037

Underlying: Common Stock · 29,037 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010887 · a4.xml · derivative · entry 4

Brown Stuart B · CIK 0001378303 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,345

Underlying: Common Stock · 13,345 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010887 · a4.xml · derivative · entry 3

Brown Stuart B · CIK 0001378303 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,223

Underlying: Common Stock · 62,223 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010886 · a4.xml · derivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,398

Underlying: Common Stock · 73,398 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010886 · a4.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 342,228

Underlying: Common Stock · 342,228 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010885 · a4.xml · derivative · entry 4

Evens Deirdre · CIK 0001401237 · EVP and Chief of Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,227

Underlying: Common Stock · 6,227 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010885 · a4.xml · derivative · entry 3

Evens Deirdre · CIK 0001401237 · EVP and Chief of Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,037

Underlying: Common Stock · 29,037 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010878 · a4.xml · derivative · entry 4

Bicks Edward · CIK 0001667756 · SVP, Strategy

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,706

Underlying: Common Stock · 3,706 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010878 · a4.xml · derivative · entry 3

Bicks Edward · CIK 0001667756 · SVP, Strategy

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,913

Underlying: Common Stock · 6,913 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-010873 · a4.xml · derivative · entry 4

Fox Raymond · CIK 0001731661 · EVP and Chief Risk Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,710

Underlying: Common Stock · 7,710 shares

Expires not disclosed

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 vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-18-010873 · a4.xml · derivative · entry 3

Fox Raymond · CIK 0001731661 · EVP and Chief Risk Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,296

Underlying: Common Stock · 8,296 shares

Expires 2028-02-15

F2 · 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: 0001104659-18-003101 · a4.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,676

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of August 16, 2016.

SEC source: 0001104659-18-003099 · a4.xml · derivative · entry 4

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,898.0223

Underlying: Common Stock · 0.3594 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: 0001104659-18-003099 · a4.xml · derivative · entry 3

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,897.6629

Underlying: Common Stock · 1 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: 0001104659-18-003099 · a4.xml · derivative · entry 2

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,896.6629

Underlying: Common Stock · 4 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: 0001104659-18-003099 · a4.xml · derivative · entry 1

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,892.6629

Underlying: Common Stock · 700 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: 0001104659-18-001683 · a4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,525

F2 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 8, 2017.

F3 · 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 $36.922 to $37.275, 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 (3).

SEC source: 0001104659-18-001683 · a4.xml · derivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 34,081 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 Common Stock.

F5 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 68,158 shares of Common Stock, were granted to the Reporting Person on January 7, 2013 and have vested in full. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 in connection with the special distribution declared by the Board of Directors of the Company on September 15, 2014 and paid on November 4, 2014.

F5 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 68,158 shares of Common Stock, were granted to the Reporting Person on January 7, 2013 and have vested in full. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 in connection with the special distribution declared by the Board of Directors of the Company on September 15, 2014 and paid on November 4, 2014.

SEC source: 0001104659-18-001683 · a4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,539

SEC source: 0001104659-18-001683 · a4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,592

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 7, 2013.

SEC source: 0001104659-18-001684 · a4.xml · derivative · entry 3

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,336.3516 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 ("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.

F3 · shares: Settlement of the Phantom Shares is in an equivalent number of whole shares of Common Stock and cash in lieu of the issuance of a fractional share of Common Stock.

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 ("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.

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: 0001104659-18-001684 · a4.xml · nonDerivative · entry 2

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,410

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

SEC source: 0001104659-18-001684 · a4.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,410.3516

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 ("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.

SEC source: 0001104659-18-000830 · a4.xml · derivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,336.3516

Underlying: Common Stock · 66.3603 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: 0001104659-18-000828 · a4.xml · derivative · entry 1

VERRECCHIA ALFRED J · CIK 0001214978 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,112.3973

Underlying: Common Stock · 476.1211 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: 0001104659-18-000829 · a4.xml · derivative · entry 1

HALVORSEN KRIS · CIK 0001184214 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,192.6629

Underlying: Common Stock · 247.8007 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: 0001104659-18-000827 · a4.xml · derivative · entry 1

ANTENUCCI TED R · CIK 0001244482 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,121.7243

Underlying: Common Stock · 460.9607 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: 0001104659-18-000826 · a4.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,258.0343

Underlying: Common Stock · 536.6089 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: 0001104659-17-072681 · a4.xml · nonDerivative · entry 1

MacLean Theodore · CIK 0001620953 · Exec. VP & CMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,184

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 7, 2017.

SEC source: 0001104659-17-072680 · a4.xml · derivative · entry 3

MARSON DEBORAH · CIK 0001691591 · Exec. VP, GC & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,323

Underlying: Common Stock · 2,157 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 6,480 shares of Common Stock, were granted to the Reporting Person on December 7, 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 6,480 shares of Common Stock, were granted to the Reporting Person on December 7, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-17-072680 · a4.xml · nonDerivative · entry 2

MARSON DEBORAH · CIK 0001691591 · Exec. VP, GC & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,863

SEC source: 0001104659-17-072680 · a4.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · Exec. VP, GC & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,562

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 December 7, 2016.

SEC source: 0001104659-17-070326 · a4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 3, 2017.

F2 · ownership.nature: Shares held by The Edward T. Bicks Living Trust dated October 27, 2015, 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: 0001104659-17-070253 · a4.xml · nonDerivative · entry 1

Brown Stuart B · CIK 0001378303 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,010

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 14, 2017.

SEC source: 0001104659-17-068000 · a4.xml · nonDerivative · entry 1

MacLean Theodore · CIK 0001620953 · Exec. VP, Chief MKTG Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,679

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 7, 2017.

SEC source: 0001104659-17-065320 · a4.xml · derivative · entry 3

MacLean Theodore · CIK 0001620953 · EVP & Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,226 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 12,652 shares of Common Stock, were granted to the Reporting Person on October 28, 2014 and have vested in full.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 12,652 shares of Common Stock, were granted to the Reporting Person on October 28, 2014 and have vested in full.

SEC source: 0001104659-17-065320 · a4.xml · nonDerivative · entry 2

MacLean Theodore · CIK 0001620953 · EVP & Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,179

SEC source: 0001104659-17-065320 · a4.xml · nonDerivative · entry 1

MacLean Theodore · CIK 0001620953 · EVP & Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,716

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 October 28, 2014.

SEC source: 0001104659-17-062182 · a4.xml · derivative · entry 6

Keddy Patrick J · CIK 0001346840 · Exec.VP,GM,N.America,W.Europe

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,884

Underlying: Common Stock · 16,417 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.

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 8, 2017.

F4 · derivative.exercise_date: This stock option, representing a right to purchase a total of 49,301 shares, has vested with respect to 16,417 shares. The remaining shares become exercisable in two substantially equal annual installments beginning on February 18, 2018.

SEC source: 0001104659-17-062182 · a4.xml · derivative · entry 5

Keddy Patrick J · CIK 0001346840 · Exec.VP,GM,N.America,W.Europe

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,011 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 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 8, 2017.

F3 · derivative.exercise_date: This stock option, representing a right to purchase a total of 7,011 shares, is fully vested.

SEC source: 0001104659-17-062182 · a4.xml · nonDerivative · entry 4

Keddy Patrick J · CIK 0001346840 · Exec.VP,GM,N.America,W.Europe

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,588

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 8, 2017.