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IRON MOUNTAIN INC. 2024-2025 Proxy Voting Records

Compiled from SEC Form N-PX filings and IRON MOUNTAIN INC.’s Form 8-K, filed 2025-06-04 (Item 5.07 on EDGAR). Page generated 04 October 2026.

22Reported items
820Asset managers
10,414Fund votes
2025-05-29Meeting date

Proxy season: 2023-2024 2024-2025 2025-2026

Explore IRON MOUNTAIN INC. in the interactive database Compare manager voting policies

Official 2024-2025 meeting results reported by IRON MOUNTAIN INC.

These tallies are IRON MOUNTAIN INC.’s own, as disclosed to the U.S. Securities and Exchange Commission on Form 8-K, filed 2025-06-04 (Item 5.07, “Submission of Matters to a Vote of Security Holders”). They cover every share voted at the meeting, not just the funds that file Form N-PX.

IRON MOUNTAIN INC. — official shareholder meeting results, meeting held 2025-05-29
Ballot item	For	Against	Abstain	Withheld	Broker non-votes	Outcome
Elect Director: Jennifer Allerton	220,750,946	1,496,885	308,718	--	33,591,568	Majority: yes
Elect Director: Pamela M. Arway	217,284,252	4,962,846	309,451	--	33,591,568	Majority: yes
Elect Director: Kent P. Dauten	212,191,961	10,028,884	335,704	--	33,591,568	Majority: yes
Elect Director: June Y. Felix	221,872,316	366,213	318,020	--	33,591,568	Majority: yes
Elect Director: Monte Ford	220,112,449	2,115,832	328,268	--	33,591,568	Majority: yes
Elect Director: Robin L. Matlock	218,950,378	3,288,845	317,326	--	33,591,568	Majority: yes
Elect Director: William L. Meaney	221,184,345	1,053,109	319,095	--	33,591,568	Majority: yes
Elect Director: Walter C. Rakowich	216,509,870	5,704,685	341,994	--	33,591,568	Majority: yes
Elect Director: Theodore R. Samuels	216,266,123	5,953,163	337,263	--	33,591,568	Majority: yes
Elect Director: Doyle R. Simons	221,101,209	1,133,771	321,569	--	33,591,568	Majority: yes

Source: IRON MOUNTAIN INC., Form 8-K, filed with the SEC on 2025-06-04 — read the filing on EDGAR.

How asset managers voted at the IRON MOUNTAIN INC. 2024-2025 meeting

Each item below shows how the 820 asset managers that disclosed a IRON MOUNTAIN INC. vote in their SEC Form N-PX filings actually voted. Share totals are the shares those managers' funds voted, summed across every fund they report. These are reported items, not a count of the ballot: fund filings describe one ballot item in different words. Two descriptions are shown as one item only on evidence — the same text (or one cut short of the other), the same director nominee, or a match to the same row of IRON MOUNTAIN INC.’s own Form 8-K tally — never because they merely read alike. A description that could not be joined that way is listed on its own, so one ballot item can appear more than once.

1. The approval of a non-binding, advisory resolution approving the compensation of our named executive officers as described in the Iron Mountain Incorporated Proxy Statement.

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

Combines 12 wordings of this item as funds reported it.

98% fund support · no official result

FOR 98%

The 753 asset managers below cast 98% of the shares they voted on this item FOR (203,773,011 for, 4,971,478 against).

FOR: 203,773,011 (97.6%)AGAINST: 4,971,478 (2.4%)ABSTAIN: 67,917 (0.0%)NOT VOTED: 45,278 (0.0%)UNKNOWN: 1,315 (0.0%)0: 209 (0.0%)

Largest asset managers voting on “The approval of a non-binding, advisory resolution approving the compensation of our named executive officers ” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	47,274,027	1	For
BlackRock	28,945,794	1,201	For
Fidelity	15,360,813	0	For
State Street	12,710,155	0	For
Cohen & Steers	10,168,326	0	For
GEODE CAPITAL MANAGEMENT, LLC	8,224,646	0	For
Charles Schwab	6,930,981	0	For
Invesco	4,760,499	0	For
Capital Group	4,236,608	0	For
Northern Trust	3,853,393	0	For
Dimensional	3,480,087	0	For
Daiwa Securities Group Inc.	2,640,718	0	For
Nuveen	2,355,003	0	For
PICTET ASSET MANAGEMENT SA	2,292,674	0	For
Russell Investments	2,194,429	0	For
UBS	1,763,029	21,905	For
Legal & General Investment Management Ltd	32,314	1,630,297	Against
TIAA	1,626,523	0	For
T. Rowe Price	1,043,299	525,281	For
Contour Asset Management LLC	1,427,250	0	For
MELLON INVESTMENTS Corp	1,323,397	0	For
PRINCIPAL GLOBAL INVESTORS	1,260,412	0	For
American Century	1,197,166	0	For
CENTERSQUARE INVESTMENT MANAGEMENT LLC	1,166,440	0	For
PARAMETRIC PORTFOLIO ASSOCIATES LLC	1,080,044	0	For

Showing the 25 largest of 753 asset managers. See all 753 in the interactive database.

2. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Doyle R. Simons

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 7 wordings of this item as funds reported it.

99.4% Majority: yes · of votes cast

FOR 99.4%

FOR: 221,101,209AGAINST: 1,133,771

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Doyle R. Simons”): 221,101,209 for, 1,133,771 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 75% for, 0.4% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,788,825 for, 28,010 against).

FOR 99.9%

FOR: 102,788,825 (99.9%)AGAINST: 28,010 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Vanguard	45,250,253	For
BlackRock	13,199,984	For
Fidelity	10,300,052	For
Cohen & Steers	7,629,475	For
Charles Schwab	3,445,070	For
State Street	2,925,388	For
Dimensional	2,796,369	For
Invesco	2,134,180	For
Capital Group	2,117,169	For
TIAA	1,624,497	For
DWS	827,826	For
American Century	738,308	For
Hartford	589,278	For
Prudential/PGIM	542,788	For
MASTER INVESTMENT PORTFOLIO	495,592	For
Russell Investments	475,575	For
John Hancock	425,529	For
T. Rowe Price	404,807	For
JPMorgan	403,451	For
Lincoln Financial	342,677	For
Jackson National	311,335	For
Virtus	282,780	For
Northern Trust	281,607	For
Apollo Diversified Real Estate Fund	261,659	For
Principal	258,399	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

3. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Jennifer Allerton

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

99.3% Majority: yes · of votes cast

FOR 99.3%

FOR: 220,750,946AGAINST: 1,496,885

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Jennifer Allerton”): 220,750,946 for, 1,496,885 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 75% for, 0.6% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,815,209 for, 1,626 against).

FOR 99.9%

FOR: 102,815,209 (100.0%)AGAINST: 1,626 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Vanguard	45,250,253	For
BlackRock	13,199,984	For
Fidelity	10,300,052	For
Cohen & Steers	7,629,475	For
Charles Schwab	3,445,070	For
State Street	2,925,388	For
Dimensional	2,796,369	For
Invesco	2,134,180	For
Capital Group	2,117,169	For
TIAA	1,624,497	For
DWS	827,826	For
American Century	738,308	For
Hartford	589,278	For
Prudential/PGIM	542,788	For
MASTER INVESTMENT PORTFOLIO	495,592	For
Russell Investments	475,575	For
John Hancock	425,529	For
T. Rowe Price	404,807	For
JPMorgan	403,451	For
Lincoln Financial	342,677	For
Jackson National	311,335	For
Virtus	282,780	For
Northern Trust	281,607	For
Apollo Diversified Real Estate Fund	261,659	For
Principal	258,399	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

4. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: June Y. Felix

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

99.8% Majority: yes · of votes cast

FOR 99.8%

FOR: 221,872,316AGAINST: 366,213

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: June Y. Felix”): 221,872,316 for, 366,213 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 75% for, 0.2% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,816,835 for, 0 against).

FOR 99.9%

FOR: 102,816,835 (100.0%)AGAINST: 0 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Vanguard	45,250,253	For
BlackRock	13,199,984	For
Fidelity	10,300,052	For
Cohen & Steers	7,629,475	For
Charles Schwab	3,445,070	For
State Street	2,925,388	For
Dimensional	2,796,369	For
Invesco	2,134,180	For
Capital Group	2,117,169	For
TIAA	1,624,497	For
DWS	827,826	For
American Century	738,308	For
Hartford	589,278	For
Prudential/PGIM	542,788	For
MASTER INVESTMENT PORTFOLIO	495,592	For
Russell Investments	475,575	For
John Hancock	425,529	For
T. Rowe Price	404,807	For
JPMorgan	403,451	For
Lincoln Financial	342,677	For
Jackson National	311,335	For
Virtus	282,780	For
Northern Trust	281,607	For
Apollo Diversified Real Estate Fund	261,659	For
Principal	258,399	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

5. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Kent P. Dauten

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

95% Majority: yes · of votes cast

FOR 95%

FOR: 212,191,961AGAINST: 10,028,884

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Kent P. Dauten”): 212,191,961 for, 10,028,884 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 72% for, 3% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.8% of the shares they voted on this item FOR (102,696,777 for, 119,968 against).

FOR 99.8%

FOR: 102,696,777 (99.8%)AGAINST: 119,968 (0.1%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,405 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,250,252	1	For
BlackRock	13,198,046	1,938	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,342	46	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

6. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Monte Ford

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

99.0% Majority: yes · of votes cast

FOR 99.0%

FOR: 220,112,449AGAINST: 2,115,832

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Monte Ford”): 220,112,449 for, 2,115,832 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 75% for, 0.8% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,788,825 for, 28,010 against).

FOR 99.9%

FOR: 102,788,825 (99.9%)AGAINST: 28,010 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Vanguard	45,250,253	For
BlackRock	13,199,984	For
Fidelity	10,300,052	For
Cohen & Steers	7,629,475	For
Charles Schwab	3,445,070	For
State Street	2,925,388	For
Dimensional	2,796,369	For
Invesco	2,134,180	For
Capital Group	2,117,169	For
TIAA	1,624,497	For
DWS	827,826	For
American Century	738,308	For
Hartford	589,278	For
Prudential/PGIM	542,788	For
MASTER INVESTMENT PORTFOLIO	495,592	For
Russell Investments	475,575	For
John Hancock	425,529	For
T. Rowe Price	404,807	For
JPMorgan	403,451	For
Lincoln Financial	342,677	For
Jackson National	311,335	For
Virtus	282,780	For
Northern Trust	281,607	For
Apollo Diversified Real Estate Fund	261,659	For
Principal	258,399	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

7. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Pamela M. Arway

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

98% Majority: yes · of votes cast

FOR 98%

FOR: 217,284,252AGAINST: 4,962,846

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Pamela M. Arway”): 217,284,252 for, 4,962,846 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 74% for, 2% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.8% of the shares they voted on this item FOR (102,681,623 for, 135,212 against).

FOR 99.8%

FOR: 102,681,623 (99.8%)AGAINST: 135,212 (0.1%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,250,252	0	For
BlackRock	13,198,046	1,938	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,342	46	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

8. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Robin L. Matlock

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

99% Majority: yes · of votes cast

FOR 99%

FOR: 218,950,378AGAINST: 3,288,845

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Robin L. Matlock”): 218,950,378 for, 3,288,845 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 74% for, 1% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,810,882 for, 5,952 against).

FOR 99.9%

FOR: 102,810,882 (99.9%)AGAINST: 5,952 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Vanguard	45,250,253	For
BlackRock	13,199,984	For
Fidelity	10,300,052	For
Cohen & Steers	7,629,475	For
Charles Schwab	3,445,070	For
State Street	2,925,388	For
Dimensional	2,796,369	For
Invesco	2,134,180	For
Capital Group	2,117,169	For
TIAA	1,624,497	For
DWS	827,826	For
American Century	738,308	For
Hartford	589,278	For
Prudential/PGIM	542,788	For
MASTER INVESTMENT PORTFOLIO	495,592	For
Russell Investments	475,575	For
John Hancock	425,529	For
T. Rowe Price	404,807	For
JPMorgan	403,451	For
Lincoln Financial	342,677	For
Jackson National	311,335	For
Virtus	282,780	For
Northern Trust	281,607	For
Apollo Diversified Real Estate Fund	261,659	For
Principal	258,399	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

9. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Theodore R. Samuels

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

97% Majority: yes · of votes cast

FOR 97%

FOR: 216,266,123AGAINST: 5,953,163

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Theodore R. Samuels”): 216,266,123 for, 5,953,163 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 73% for, 2% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.8% of the shares they voted on this item FOR (102,711,500 for, 105,335 against).

FOR 99.8%

FOR: 102,711,500 (99.9%)AGAINST: 105,335 (0.1%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,246,863	3,390	For
BlackRock	13,198,046	1,938	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,388	0	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

10. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: Walter C. Rakowich

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

97% Majority: yes · of votes cast

FOR 97%

FOR: 216,509,870AGAINST: 5,704,685

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: Walter C. Rakowich”): 216,509,870 for, 5,704,685 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 73% for, 2% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.8% of the shares they voted on this item FOR (102,691,049 for, 119,967 against).

FOR 99.8%

FOR: 102,691,049 (99.8%)AGAINST: 119,967 (0.1%)ABSTAIN: 51,125 (0.0%)UNKNOWN: 1,405 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,250,252	1	For
BlackRock	13,198,046	1,938	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,342	46	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

11. For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until their successors are elected and qualified: William L. Meaney

DIRECTOR ELECTIONSMajority of the votes cast: yes

Meeting held 2025-05-29.

Combines 8 wordings of this item as funds reported it.

99.5% Majority: yes · of votes cast

FOR 99.5%

FOR: 221,184,345AGAINST: 1,053,109

IRON MOUNTAIN INC.’s own tally for this item (“Elect Director: William L. Meaney”): 221,184,345 for, 1,053,109 against, per its Form 8-K filed 2025-06-04 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item. Of all 294,968,740 outstanding shares: 75% for, 0.4% against (75% of the company cast a for/against vote).

The 145 asset managers below cast 99.9% of the shares they voted on this item FOR (102,816,812 for, 23 against).

FOR 99.9%

FOR: 102,816,812 (100.0%)AGAINST: 23 (0.0%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “For the election of ten (10) directors to the Iron Mountain Incorporated Board of Directors for a one-year ter” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,250,253	0	For
BlackRock	13,199,984	0	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,365	23	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 145 asset managers. See all 145 in the interactive database.

12. The approval of an amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan as described in the Iron Mountain Incorporated Proxy Statement.

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

Combines 3 wordings of this item as funds reported it.

99.1% fund support · no official result

FOR 99.1%

The 142 asset managers below cast 99.1% of the shares they voted on this item FOR (101,909,812 for, 824,283 against).

FOR: 101,909,812 (99.2%)AGAINST: 824,283 (0.8%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,315 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “The approval of an amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan as described” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,250,252	1	For
BlackRock	13,199,984	0	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,342	46	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	0	738,308	Against
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 142 asset managers. See all 142 in the interactive database.

13. THE RATIFICATION OF THE SELECTION BY THE AUDIT COMMITTEE OF DELOITTE & TOUCHE LLP AS IRON MOUNTAIN INCORPORATED'S INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE YEAR ENDING DECEMBER 31, 2025.

AUDIT-RELATED

Meeting held 2025-05-29.

Combines 4 wordings of this item as funds reported it.

99.9% fund support · no official result

FOR 99.8%

The 139 asset managers below cast 99.9% of the shares they voted on this item FOR (102,403,335 for, 84,054 against).

FOR: 102,403,335 (99.9%)AGAINST: 84,054 (0.1%)ABSTAIN: 45,397 (0.0%)UNKNOWN: 1,405 (0.0%)NOT VOTED: 46 (0.0%)

Largest asset managers voting on “THE RATIFICATION OF THE SELECTION BY THE AUDIT COMMITTEE OF DELOITTE & TOUCHE LLP AS IRON MOUNTAIN INCORPORATE” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Vanguard	45,246,863	3,390	For
BlackRock	13,199,984	0	For
Fidelity	10,300,052	0	For
Cohen & Steers	7,629,475	0	For
Charles Schwab	3,445,070	0	For
State Street	2,925,342	46	For
Dimensional	2,796,369	0	For
Invesco	2,134,180	0	For
Capital Group	2,117,169	0	For
TIAA	1,624,497	0	For
DWS	827,826	0	For
American Century	738,308	0	For
Hartford	589,278	0	For
Prudential/PGIM	542,788	0	For
MASTER INVESTMENT PORTFOLIO	495,592	0	For
Russell Investments	475,575	0	For
John Hancock	425,529	0	For
T. Rowe Price	404,807	0	For
JPMorgan	403,451	0	For
Lincoln Financial	342,677	0	For
Jackson National	311,335	0	For
Virtus	282,780	0	For
Northern Trust	281,607	0	For
Apollo Diversified Real Estate Fund	261,659	0	For
Principal	258,399	0	For

Showing the 25 largest of 139 asset managers. See all 139 in the interactive database.

14. Advisory Vote to Ratify Named Executive Officers' Compensation

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

85% fund support · no official result

FOR 85%AGAINST 15%

The 34 asset managers below cast 85% of the shares they voted on this item FOR (3,190,729 for, 549,786 against).

FOR: 3,190,729 (85.3%)AGAINST: 549,786 (14.7%)

Largest asset managers voting on “Advisory Vote to Ratify Named Executive Officers' Compensation” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
APG Asset Management US Inc.	1,216,836	0	For
JPMorgan	931,879	0	For
ADAGE CAPITAL PARTNERS GP, L.L.C.	281,043	0	For
NORDEA INVESTMENT MANAGEMENT AB	0	197,109	Against
STOREBRAND ASSET MANAGEMENT AS	169,453	0	For
HEITMAN REAL ESTATE SECURITIES LLC	154,442	0	For
GuideStone	137,845	0	For
TD ASSET MANAGEMENT INC	132,620	0	For
Desjardins Global Asset Management Inc.	0	104,222	Against
Union Investment Privatfonds GmbH	0	100,631	Against
Cardano Risk Management B.V.	0	98,341	Against
Bluerock Total Income (plus) Real Estate Fund	55,185	0	For
Empower	39,415	0	For
Erste Asset Management GmbH	22,300	0	For
B&I Capital AG	0	18,190	Against
OSSIAM	0	15,536	Against
VALUED ADVISERS TRUST	0	15,000	Against
TD Waterhouse Canada Inc.	13,734	0	For
LASALLE INVESTMENT MANAGEMENT SECURITIES LLC	7,515	0	For
Metzler Asset Management GmbH	6,023	0	For
HC CAPITAL TRUST	5,259	0	For
FAYEZ SAROFIM & CO	4,080	0	For
ALGERT GLOBAL LLC	2,570	0	For
Coyle Financial Counsel LLC	2,505	0	For
SIERRA SUMMIT ADVISORS LLC	2,505	0	For

Showing the 25 largest of 34 asset managers. See all 34 in the interactive database.

15. 14A Executive Compensation

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

Combines 2 wordings of this item as funds reported it.

90% fund support · no official result

FOR 90%10%

The 11 asset managers below cast 90% of the shares they voted on this item FOR (46,632 for, 4,916 against).

FOR: 46,632 (90.3%)AGAINST: 4,916 (9.5%)NOT VOTED: 108 (0.2%)

Largest asset managers voting on “14A Executive Compensation” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Green Alpha Advisors, LLC	17,555	0	For
Bramshill Investments, LLC	15,765	0	For
Focus Partners Wealth	7,831	4,916	For
IMA Advisory Services, Inc.	2,954	0	For
COURIER CAPITAL LLC	1,259	0	For
Baker Avenue Asset Management, LP	1,013	0	For
Moisand Fitzgerald Tamayo, LLC	113	0	For
LEAVELL INVESTMENT MANAGEMENT, INC.	0	0	Not Voted
Ballew Advisors, Inc	71	0	For
Blue Fin Capital, Inc.	54	0	For
MQS Management LLC	17	0	For

16. Amend Omnibus Stock Plan

COMPENSATION

Meeting held 2025-05-29.

99% fund support · no official result

FOR 99%

The 9 asset managers below cast 99% of the shares they voted on this item FOR (532,345 for, 7,500 against).

FOR: 532,345 (98.6%)AGAINST: 7,500 (1.4%)

Largest asset managers voting on “Amend Omnibus Stock Plan” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
Adelante Capital Management LLC	262,284	0	For
GuideStone	137,845	0	For
Bluerock Total Income (plus) Real Estate Fund	55,185	0	For
Empower	39,415	0	For
Erste Asset Management GmbH	22,300	0	For
VALUED ADVISERS TRUST	15,000	0	For
HC CAPITAL TRUST	0	5,259	Against
CLEARWATER INVESTMENT TRUST	0	2,241	Against
NORTHERN LIGHTS FUND TRUST III	316	0	For

17. Ratify Deloitte & Touche LLP as Auditors

AUDIT-RELATED

Meeting held 2025-05-29.

95% fund support · no official result

FOR 95%

The 7 asset managers below cast 95% of the shares they voted on this item FOR (262,245 for, 15,000 against).

FOR: 262,245 (94.6%)AGAINST: 15,000 (5.4%)

Largest asset managers voting on “Ratify Deloitte & Touche LLP as Auditors” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Vote
GuideStone	137,845	0	For
Bluerock Total Income (plus) Real Estate Fund	55,185	0	For
Empower	39,415	0	For
Erste Asset Management GmbH	22,300	0	For
VALUED ADVISERS TRUST	0	15,000	Against
HC CAPITAL TRUST	5,259	0	For
CLEARWATER INVESTMENT TRUST	2,241	0	For

18. Amendment to the 2014 Stock and Cash Incentive Plan

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

100% fund support · no official result

FOR 100%

The 6 asset managers below cast 100% of the shares they voted on this item FOR (222,373 for, 0 against).

FOR: 222,373 (100.0%)

Largest asset managers voting on “Amendment to the 2014 Stock and Cash Incentive Plan” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Union Investment Privatfonds GmbH	100,631	For
Cardano Risk Management B.V.	98,341	For
OSSIAM	15,536	For
FAYEZ SAROFIM & CO	4,080	For
ALGERT GLOBAL LLC	2,570	For
Empirical Financial Services, LLC d.b.a. Empirical Wealth Ma	1,215	For

19. The approval of a non-binding, advisory resolution approving the compensation of our named executive officers as described in the Iron Mountain Incorporated Proxy Statement

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2024-05-30 (outside the 2024-2025 season's 1 July to 30 June window; reported in this season's filings).

Combines 2 wordings of this item as funds reported it.

100% fund support · no official result

FOR 100%

The 4 asset managers below cast 100% of the shares they voted on this item FOR (50,833 for, 0 against).

FOR: 50,833 (100.0%)

Largest asset managers voting on “The approval of a non-binding, advisory resolution approving the compensation of our named executive officers ” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Americana Partners, LLC	48,040	For
COLDSTREAM CAPITAL MANAGEMENT INC	2,576	For
Sky Investment Group LLC	217	For
Echo45 Advisors LLC	0	--

20. Director Elections

DIRECTOR ELECTIONS

Meeting held 2025-05-29.

100% fund support · no official result

FOR 100%

The 3 asset managers below cast 100% of the shares they voted on this item FOR (2,110 for, 0 against).

FOR: 2,110 (100.0%)

Largest asset managers voting on “Director Elections” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Vote
Members Trust Co	1,703	For
Praetorian Wealth Management, Inc.	336	For
Ballew Advisors, Inc	71	For

21. Ratification of Auditor

AUDIT-RELATED

Meeting held 2025-05-29.

0.4% fund support · no official result

AGAINST 99.6%

The 2 asset managers below cast 0.4% of the shares they voted on this item FOR (316 for, 98,341 against).

FOR: 316 (0.3%)AGAINST: 98,341 (99.7%)

Largest asset managers voting on “Ratification of Auditor” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Abstain	Withheld	Vote
Cardano Risk Management B.V.	0	98,341	0	0	Against
NORTHERN LIGHTS FUND TRUST III	316	0	0	0	For

22. Section 14A say-on-pay votes

SECTION 14A SAY-ON-PAY VOTES

Meeting held 2025-05-29.

100% fund support · no official result

FOR 100%

The 2 asset managers below cast 100% of the shares they voted on this item FOR (110,878 for, 0 against).

FOR: 110,878 (100.0%)

Largest asset managers voting on “Section 14A say-on-pay votes” at IRON MOUNTAIN INC., 2024-2025
Asset manager	For	Against	Abstain	Withheld	Vote
Waterfront Capital Partners, LLC	105,299	0	0	0	For
Pinnacle Family Advisors, LLC	5,579	0	0	0	For

Largest IRON MOUNTAIN INC. shareholders voting in 2024-2025

Ranked by the number of IRON MOUNTAIN INC. shares each manager voted on the most widely held ballot item of the 2024-2025 meeting, shown as a share of the 294,968,740 shares outstanding at the time of that meeting.

Top IRON MOUNTAIN INC. shareholders by shares voted, 2024-2025
#	Asset manager	% of shares outstanding
1	Vanguard	16.03%
2	BlackRock	9.81%
3	Fidelity	5.21%
4	State Street	4.31%
5	Cohen & Steers	3.45%
6	GEODE CAPITAL MANAGEMENT, LLC	2.79%
7	Charles Schwab	2.36%
8	Invesco	1.61%
9	Capital Group	1.44%
10	Northern Trust	1.31%

Reported IRON MOUNTAIN INC. ownership

Positions disclosed to the SEC on Schedules 13D and 13G, Form 13F and the company’s own proxy statement (DEF 14A).

IRON MOUNTAIN INC. beneficial owners on record for the 2024-2025 proxy season
Holder	% outstanding	Disclosure
Vanguard Group	15.87%	13F
BlackRock	11.94%	13F
Vanguard Portfolio Management	8.49%	13G
State Street	5.66%	13F
Cohen & Steers, Inc.	4.93%	13G
FMR (Fidelity)	1.79%	13F
Northern Trust	1.45%	13F
Dimensional Fund Advisors	1.44%	13F
Charles Schwab	1.18%	13F
Morgan Stanley	1.15%	13F

Percentages above are of 294,968,740 shares outstanding, as reported by IRON MOUNTAIN INC. on its Form 10-Q dated 2025-03-31 (see the filing on EDGAR). This is the count contemporaneous with the 2024-2025 meeting, so the percentages are the ones that were true then, not ones restated against today’s share count.

About this page

Every figure above is derived from filings made with the US Securities and Exchange Commission: Form N-PX, in which registered investment companies and institutional managers disclose how they voted every proxy, and Form 8-K Item 5.07, in which the company reports its own meeting results. Shares outstanding are taken from IRON MOUNTAIN INC.’s 10-Q dated 2025-03-31. This page is a static snapshot rebuilt weekly on 04 October 2026; a live search always shows the current data.

At IRON MOUNTAIN INC.'s shareholder meeting held 2025-05-29, in the 2024-2025 proxy season, 820 asset managers reported how they voted in their SEC Form N-PX filings, covering 10,414 separate fund positions. Their filings are grouped here into 22 reported items; because filers word the same ballot item differently, that can be more than the number of items on the ballot. IRON MOUNTAIN INC.'s own Form 8-K tally for this meeting is published below, but no row in it could be matched to the most widely held item, so this page states no certified outcome for that item. On that item — The approval of a non-binding, advisory resolution approving the compensation of our named… — the reporting funds cast 98% of the shares they voted in favour (FOR divided by FOR plus AGAINST, the conventional basis for proxy support; abstentions, broker non-votes and unvoted shares are excluded because none of them took a side). That is the aggregate of those managers' own N-PX disclosures, not the company's certified result, and the funds are a subset of all shareholders.

IRON MOUNTAIN INC. proxy season coverage: 2023-2024 · 2024-2025 (this page) · 2025-2026.