Pierce Leahy Corporation
Plan context: The Iron Mountain Companies 401K Plan
EIN 23-2588479 • Royersford, PA • 84 filings • 14 plans
Current Snapshot
Latest Year
2024
2024 Participants
10,656
2024 Assets
$945,287,760
2024 Contributions
$103,140,483
Historical Graphs
Total Assets Over Time
Aggregate end-of-year assets by filing year, excluding zero-asset years
Participants Over Time
Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans
Company Timeline
Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.
| Year / Filing | Filings | Participants | Assets | Contributions | Contrib./Participant |
|---|---|---|---|---|---|
| 2024 | 3 | 10,656 | $945,287,760 | $103,140,483 | $9,679iApproximate average salary by contribution assumption: employee only about $241,977 at 4% or $161,318 at 6%; with 50% employer match about $161,318 at 4% or $107,546 at 6%; with 100% employer match about $120,989 at 4% or $80,659 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 10,113 | $943,119,140 | $102,938,285 | $10,179iApproximate average salary by contribution assumption: employee only about $254,470 at 4% or $169,647 at 6%; with 50% employer match about $169,647 at 4% or $113,098 at 6%; with 100% employer match about $127,235 at 4% or $84,823 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 44 | $2,168,620 | $202,198 | $4,595iApproximate average salary by contribution assumption: employee only about $114,885 at 4% or $76,590 at 6%; with 50% employer match about $76,590 at 4% or $51,060 at 6%; with 100% employer match about $57,443 at 4% or $38,295 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 10,656 | - | - | - |
| 2023 | 3 | 9,413 | $806,366,594 | $80,329,645 | $8,534iApproximate average salary by contribution assumption: employee only about $213,348 at 4% or $142,232 at 6%; with 50% employer match about $142,232 at 4% or $94,821 at 6%; with 100% employer match about $106,674 at 4% or $71,116 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 9,146 | $804,601,580 | $80,167,709 | $8,765iApproximate average salary by contribution assumption: employee only about $219,133 at 4% or $146,089 at 6%; with 50% employer match about $146,089 at 4% or $97,393 at 6%; with 100% employer match about $109,567 at 4% or $73,044 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 47 | $1,765,014 | $161,936 | $3,445iApproximate average salary by contribution assumption: employee only about $86,136 at 4% or $57,424 at 6%; with 50% employer match about $57,424 at 4% or $38,283 at 6%; with 100% employer match about $43,068 at 4% or $28,712 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 9,413 | - | - | - |
| 2022 | 3 | 8,892 | $652,743,918 | $69,750,463 | $7,844iApproximate average salary by contribution assumption: employee only about $196,105 at 4% or $130,736 at 6%; with 50% employer match about $130,736 at 4% or $87,158 at 6%; with 100% employer match about $98,052 at 4% or $65,368 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,643 | $651,344,944 | $69,631,510 | $8,056iApproximate average salary by contribution assumption: employee only about $201,410 at 4% or $134,273 at 6%; with 50% employer match about $134,273 at 4% or $89,516 at 6%; with 100% employer match about $100,705 at 4% or $67,137 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 49 | $1,398,974 | $118,953 | $2,428iApproximate average salary by contribution assumption: employee only about $60,690 at 4% or $40,460 at 6%; with 50% employer match about $40,460 at 4% or $26,973 at 6%; with 100% employer match about $30,345 at 4% or $20,230 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,892 | - | - | - |
| 2021 | 3 | 8,346 | $811,172,850 | $61,335,906 | $7,349iApproximate average salary by contribution assumption: employee only about $183,728 at 4% or $122,486 at 6%; with 50% employer match about $122,486 at 4% or $81,657 at 6%; with 100% employer match about $91,864 at 4% or $61,243 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,917 | $809,450,428 | $61,217,785 | $7,732iApproximate average salary by contribution assumption: employee only about $193,311 at 4% or $128,874 at 6%; with 50% employer match about $128,874 at 4% or $85,916 at 6%; with 100% employer match about $96,656 at 4% or $64,437 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 50 | $1,722,422 | $118,121 | $2,362iApproximate average salary by contribution assumption: employee only about $59,061 at 4% or $39,374 at 6%; with 50% employer match about $39,374 at 4% or $26,249 at 6%; with 100% employer match about $29,530 at 4% or $19,687 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,346 | - | - | - |
| 2020 | 3 | 8,393 | $714,815,639 | $55,061,697 | $6,560iApproximate average salary by contribution assumption: employee only about $164,011 at 4% or $109,341 at 6%; with 50% employer match about $109,341 at 4% or $72,894 at 6%; with 100% employer match about $82,005 at 4% or $54,670 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,874 | $713,199,961 | $54,955,459 | $6,979iApproximate average salary by contribution assumption: employee only about $174,484 at 4% or $116,323 at 6%; with 50% employer match about $116,323 at 4% or $77,548 at 6%; with 100% employer match about $87,242 at 4% or $58,161 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 51 | $1,615,678 | $106,238 | $2,083iApproximate average salary by contribution assumption: employee only about $52,077 at 4% or $34,718 at 6%; with 50% employer match about $34,718 at 4% or $23,146 at 6%; with 100% employer match about $26,039 at 4% or $17,359 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,393 | - | - | - |
| 2019 | 3 | 8,295 | $654,120,417 | $61,239,804 | $7,383iApproximate average salary by contribution assumption: employee only about $184,568 at 4% or $123,046 at 6%; with 50% employer match about $123,046 at 4% or $82,030 at 6%; with 100% employer match about $92,284 at 4% or $61,523 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,188 | $652,613,633 | $61,098,946 | $7,462iApproximate average salary by contribution assumption: employee only about $186,550 at 4% or $124,367 at 6%; with 50% employer match about $124,367 at 4% or $82,911 at 6%; with 100% employer match about $93,275 at 4% or $62,183 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 57 | $1,506,784 | $140,858 | $2,471iApproximate average salary by contribution assumption: employee only about $61,780 at 4% or $41,187 at 6%; with 50% employer match about $41,187 at 4% or $27,458 at 6%; with 100% employer match about $30,890 at 4% or $20,593 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,295 | - | - | - |
| 2018 | 3 | 8,823 | $530,209,958 | $54,090,717 | $6,131iApproximate average salary by contribution assumption: employee only about $153,266 at 4% or $102,177 at 6%; with 50% employer match about $102,177 at 4% or $68,118 at 6%; with 100% employer match about $76,633 at 4% or $51,089 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,314 | $529,041,905 | $53,978,872 | $6,493iApproximate average salary by contribution assumption: employee only about $162,313 at 4% or $108,209 at 6%; with 50% employer match about $108,209 at 4% or $72,139 at 6%; with 100% employer match about $81,157 at 4% or $54,104 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 50 | $1,168,053 | $111,845 | $2,237iApproximate average salary by contribution assumption: employee only about $55,923 at 4% or $37,282 at 6%; with 50% employer match about $37,282 at 4% or $24,854 at 6%; with 100% employer match about $27,961 at 4% or $18,641 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,823 | - | - | - |
| 2017 | 3 | 8,172 | $545,489,301 | $46,047,009 | $5,635iApproximate average salary by contribution assumption: employee only about $140,868 at 4% or $93,912 at 6%; with 50% employer match about $93,912 at 4% or $62,608 at 6%; with 100% employer match about $70,434 at 4% or $46,956 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,929 | $544,015,616 | $45,942,352 | $5,794iApproximate average salary by contribution assumption: employee only about $144,855 at 4% or $96,570 at 6%; with 50% employer match about $96,570 at 4% or $64,380 at 6%; with 100% employer match about $72,428 at 4% or $48,285 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 52 | $1,473,685 | $104,657 | $2,013iApproximate average salary by contribution assumption: employee only about $50,316 at 4% or $33,544 at 6%; with 50% employer match about $33,544 at 4% or $22,363 at 6%; with 100% employer match about $25,158 at 4% or $16,772 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,172 | - | - | - |
| 2016 | 3 | 8,548 | $469,858,943 | $44,552,532 | $5,212iApproximate average salary by contribution assumption: employee only about $130,301 at 4% or $86,867 at 6%; with 50% employer match about $86,867 at 4% or $57,912 at 6%; with 100% employer match about $65,151 at 4% or $43,434 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,312 | $468,607,490 | $44,448,872 | $5,348iApproximate average salary by contribution assumption: employee only about $133,689 at 4% or $89,126 at 6%; with 50% employer match about $89,126 at 4% or $59,417 at 6%; with 100% employer match about $66,844 at 4% or $44,563 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 48 | $1,251,453 | $103,660 | $2,160iApproximate average salary by contribution assumption: employee only about $53,990 at 4% or $35,993 at 6%; with 50% employer match about $35,993 at 4% or $23,995 at 6%; with 100% employer match about $26,995 at 4% or $17,997 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,548 | - | - | - |
| 2015 | 3 | 7,807 | $377,389,600 | $40,474,705 | $5,184iApproximate average salary by contribution assumption: employee only about $129,610 at 4% or $86,407 at 6%; with 50% employer match about $86,407 at 4% or $57,605 at 6%; with 100% employer match about $64,805 at 4% or $43,203 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,478 | $376,273,584 | $40,367,818 | $5,398iApproximate average salary by contribution assumption: employee only about $134,955 at 4% or $89,970 at 6%; with 50% employer match about $89,970 at 4% or $59,980 at 6%; with 100% employer match about $67,478 at 4% or $44,985 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 49 | $1,116,016 | $106,887 | $2,181iApproximate average salary by contribution assumption: employee only about $54,534 at 4% or $36,356 at 6%; with 50% employer match about $36,356 at 4% or $24,237 at 6%; with 100% employer match about $27,267 at 4% or $18,178 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 7,807 | - | - | - |
| 2014 | 3 | 7,477 | $372,776,140 | $38,468,598 | $5,145iApproximate average salary by contribution assumption: employee only about $128,623 at 4% or $85,749 at 6%; with 50% employer match about $85,749 at 4% or $57,166 at 6%; with 100% employer match about $64,312 at 4% or $42,874 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,477 | $371,741,877 | $38,364,551 | $5,131iApproximate average salary by contribution assumption: employee only about $128,275 at 4% or $85,517 at 6%; with 50% employer match about $85,517 at 4% or $57,011 at 6%; with 100% employer match about $64,138 at 4% or $42,758 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 48 | $1,034,263 | $104,047 | $2,168iApproximate average salary by contribution assumption: employee only about $54,191 at 4% or $36,127 at 6%; with 50% employer match about $36,127 at 4% or $24,085 at 6%; with 100% employer match about $27,096 at 4% or $18,064 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 6,247 | - | - | - |
| 2013 | 3 | 8,264 | $353,336,592 | $39,182,048 | $4,741iApproximate average salary by contribution assumption: employee only about $118,532 at 4% or $79,022 at 6%; with 50% employer match about $79,022 at 4% or $52,681 at 6%; with 100% employer match about $59,266 at 4% or $39,511 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,127 | $352,454,386 | $38,987,741 | $4,797iApproximate average salary by contribution assumption: employee only about $119,933 at 4% or $79,955 at 6%; with 50% employer match about $79,955 at 4% or $53,303 at 6%; with 100% employer match about $59,966 at 4% or $39,978 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 48 | $882,206 | $194,307 | $4,048iApproximate average salary by contribution assumption: employee only about $101,202 at 4% or $67,468 at 6%; with 50% employer match about $67,468 at 4% or $44,978 at 6%; with 100% employer match about $50,601 at 4% or $33,734 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,264 | - | - | - |
| 2012 | 3 | 8,387 | $286,650,639 | $33,053,565 | $3,941iApproximate average salary by contribution assumption: employee only about $98,526 at 4% or $65,684 at 6%; with 50% employer match about $65,684 at 4% or $43,789 at 6%; with 100% employer match about $49,263 at 4% or $32,842 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,080 | $286,010,456 | $32,951,402 | $4,078iApproximate average salary by contribution assumption: employee only about $101,954 at 4% or $67,969 at 6%; with 50% employer match about $67,969 at 4% or $45,313 at 6%; with 100% employer match about $50,977 at 4% or $33,985 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 48 | $640,183 | $102,163 | $2,128iApproximate average salary by contribution assumption: employee only about $53,210 at 4% or $35,473 at 6%; with 50% employer match about $35,473 at 4% or $23,649 at 6%; with 100% employer match about $26,605 at 4% or $17,737 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,387 | - | - | - |
| 2011 | 3 | 8,617 | $251,522,835 | $33,535,528 | $3,892iApproximate average salary by contribution assumption: employee only about $97,295 at 4% or $64,863 at 6%; with 50% employer match about $64,863 at 4% or $43,242 at 6%; with 100% employer match about $48,647 at 4% or $32,432 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,316 | $251,004,244 | $33,447,823 | $4,022iApproximate average salary by contribution assumption: employee only about $100,553 at 4% or $67,035 at 6%; with 50% employer match about $67,035 at 4% or $44,690 at 6%; with 100% employer match about $50,276 at 4% or $33,518 at 6%. |
| The Iron Mountain Companies Puerto Rico 401(K) Plan | - | 45 | $518,591 | $87,705 | $1,949iApproximate average salary by contribution assumption: employee only about $48,725 at 4% or $32,483 at 6%; with 50% employer match about $32,483 at 4% or $21,656 at 6%; with 100% employer match about $24,363 at 4% or $16,242 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,617 | - | - | - |
| 2010 | 3 | 9,901 | $260,631,944 | $36,268,148 | $3,663iApproximate average salary by contribution assumption: employee only about $91,577 at 4% or $61,051 at 6%; with 50% employer match about $61,051 at 4% or $40,701 at 6%; with 100% employer match about $45,788 at 4% or $30,526 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 9,434 | $260,187,288 | $36,186,730 | $3,836iApproximate average salary by contribution assumption: employee only about $95,894 at 4% or $63,930 at 6%; with 50% employer match about $63,930 at 4% or $42,620 at 6%; with 100% employer match about $47,947 at 4% or $31,965 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 43 | $444,656 | $81,418 | $1,893iApproximate average salary by contribution assumption: employee only about $47,336 at 4% or $31,557 at 6%; with 50% employer match about $31,557 at 4% or $21,038 at 6%; with 100% employer match about $23,668 at 4% or $15,779 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 9,901 | - | - | - |
| 2009 | 3 | 10,354 | $216,979,565 | $34,290,432 | $3,312iApproximate average salary by contribution assumption: employee only about $82,795 at 4% or $55,197 at 6%; with 50% employer match about $55,197 at 4% or $36,798 at 6%; with 100% employer match about $41,398 at 4% or $27,598 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 10,013 | $216,623,078 | $34,194,780 | $3,415iApproximate average salary by contribution assumption: employee only about $85,376 at 4% or $56,917 at 6%; with 50% employer match about $56,917 at 4% or $37,945 at 6%; with 100% employer match about $42,688 at 4% or $28,459 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 48 | $356,487 | $95,652 | $1,993iApproximate average salary by contribution assumption: employee only about $49,819 at 4% or $33,213 at 6%; with 50% employer match about $33,213 at 4% or $22,142 at 6%; with 100% employer match about $24,909 at 4% or $16,606 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 10,354 | - | - | - |
| 2008 | 3 | 11,138 | $162,821,898 | $35,582,340 | $3,195iApproximate average salary by contribution assumption: employee only about $79,867 at 4% or $53,245 at 6%; with 50% employer match about $53,245 at 4% or $35,496 at 6%; with 100% employer match about $39,933 at 4% or $26,622 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 10,995 | $162,595,256 | $35,488,393 | $3,228iApproximate average salary by contribution assumption: employee only about $80,692 at 4% or $53,795 at 6%; with 50% employer match about $53,795 at 4% or $35,863 at 6%; with 100% employer match about $40,346 at 4% or $26,897 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 46 | $226,642 | $93,947 | $2,042iApproximate average salary by contribution assumption: employee only about $51,058 at 4% or $34,039 at 6%; with 50% employer match about $34,039 at 4% or $22,693 at 6%; with 100% employer match about $25,529 at 4% or $17,019 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 11,138 | - | - | - |
| 2007 | 3 | 11,138 | $195,764,247 | $33,674,139 | $3,023iApproximate average salary by contribution assumption: employee only about $75,584 at 4% or $50,389 at 6%; with 50% employer match about $50,389 at 4% or $33,593 at 6%; with 100% employer match about $37,792 at 4% or $25,195 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 11,034 | $195,764,247 | $33,674,139 | $3,052iApproximate average salary by contribution assumption: employee only about $76,296 at 4% or $50,864 at 6%; with 50% employer match about $50,864 at 4% or $33,909 at 6%; with 100% employer match about $38,148 at 4% or $25,432 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 11,138 | - | - | - |
| The Iron Mountain Companies 401K Plan | - | 41 | - | - | - |
| 2006 | 4 | 10,291 | $165,013,233 | $30,563,429 | $2,970iApproximate average salary by contribution assumption: employee only about $74,248 at 4% or $49,499 at 6%; with 50% employer match about $49,499 at 4% or $32,999 at 6%; with 100% employer match about $37,124 at 4% or $24,749 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 10,071 | $164,934,238 | $30,483,377 | $3,027iApproximate average salary by contribution assumption: employee only about $75,671 at 4% or $50,447 at 6%; with 50% employer match about $50,447 at 4% or $33,632 at 6%; with 100% employer match about $37,836 at 4% or $25,224 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 39 | $78,995 | $80,052 | $2,053iApproximate average salary by contribution assumption: employee only about $51,315 at 4% or $34,210 at 6%; with 50% employer match about $34,210 at 4% or $22,807 at 6%; with 100% employer match about $25,658 at 4% or $17,105 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 10,291 | - | - | - |
| THE IRON MOUNTAIN COMPANIES BUSINESS TRAVEL ACCIDENT INSURANCE PLAN | - | 0 | - | - | - |
| 2005 | 4 | 16,695 | $134,250,671 | $23,510,216 | $1,408iApproximate average salary by contribution assumption: employee only about $35,205 at 4% or $23,470 at 6%; with 50% employer match about $23,470 at 4% or $15,647 at 6%; with 100% employer match about $17,603 at 4% or $11,735 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 9,704 | $134,250,671 | $23,510,216 | $2,423iApproximate average salary by contribution assumption: employee only about $60,568 at 4% or $40,379 at 6%; with 50% employer match about $40,379 at 4% or $26,919 at 6%; with 100% employer match about $30,284 at 4% or $20,189 at 6%. |
| Arcus Inc. 401K Profit Sharing Plan | - | 0 | - | - | - |
| The Iron Mountain Companies Welfare Plan | - | 7,622 | - | - | - |
| THE IRON MOUNTAIN COMPANIES BUSINESS TRAVEL ACCIDENT INSURANCE PLAN | - | 16,695 | - | - | - |
| 2004 | 4 | 8,904 | $104,282,139 | $22,273,032 | $2,501iApproximate average salary by contribution assumption: employee only about $62,537 at 4% or $41,691 at 6%; with 50% employer match about $41,691 at 4% or $27,794 at 6%; with 100% employer match about $31,268 at 4% or $20,846 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,904 | $104,282,139 | $22,273,032 | $2,501iApproximate average salary by contribution assumption: employee only about $62,537 at 4% or $41,691 at 6%; with 50% employer match about $41,691 at 4% or $27,794 at 6%; with 100% employer match about $31,268 at 4% or $20,846 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 6,950 | - | - | - |
| The Iron Mountain Companies 401K Plan | - | 0 | - | - | - |
| THE IRON MOUNTAIN COMPANIES BUSINESS TRAVEL ACCIDENT INSURANCE PLAN | - | 8,896 | - | - | - |
| 2003 | 2 | 8,979 | $80,615,730 | $16,360,705 | $1,822iApproximate average salary by contribution assumption: employee only about $45,553 at 4% or $30,368 at 6%; with 50% employer match about $30,368 at 4% or $20,246 at 6%; with 100% employer match about $22,776 at 4% or $15,184 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 8,979 | $80,615,730 | $16,360,705 | $1,822iApproximate average salary by contribution assumption: employee only about $45,553 at 4% or $30,368 at 6%; with 50% employer match about $30,368 at 4% or $20,246 at 6%; with 100% employer match about $22,776 at 4% or $15,184 at 6%. |
| The Iron Mountain Companies Welfare Plan | - | 8,896 | - | - | - |
| 2002 | 3 | 9,433 | $57,287,500 | $13,827,195 | $1,466iApproximate average salary by contribution assumption: employee only about $36,646 at 4% or $24,431 at 6%; with 50% employer match about $24,431 at 4% or $16,287 at 6%; with 100% employer match about $18,323 at 4% or $12,215 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,946 | $57,287,500 | $13,827,195 | $1,740iApproximate average salary by contribution assumption: employee only about $43,504 at 4% or $29,002 at 6%; with 50% employer match about $29,002 at 4% or $19,335 at 6%; with 100% employer match about $21,752 at 4% or $14,501 at 6%. |
| Arcus Inc. 401K Profit Sharing Plan | - | 0 | - | - | - |
| The Iron Mountain Companies Welfare Plan | - | 9,433 | - | - | - |
| 2001 | 3 | 8,940 | $54,704,754 | $13,257,102 | $1,483iApproximate average salary by contribution assumption: employee only about $37,072 at 4% or $24,715 at 6%; with 50% employer match about $24,715 at 4% or $16,477 at 6%; with 100% employer match about $18,536 at 4% or $12,357 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 7,718 | $54,704,754 | $13,257,102 | $1,718iApproximate average salary by contribution assumption: employee only about $42,942 at 4% or $28,628 at 6%; with 50% employer match about $28,628 at 4% or $19,085 at 6%; with 100% employer match about $21,471 at 4% or $14,314 at 6%. |
| Arcus Inc. 401K Profit Sharing Plan | - | 0 | - | - | - |
| The Iron Mountain Companies Welfare Plan | - | 8,940 | - | - | - |
| 2000 | 4 | 8,106 | $0 | $0 | - |
| The Iron Mountain Companies 401K Plan | - | 6,899 | - | - | - |
| Arcus Inc. 401K Profit Sharing Plan | - | 0 | - | - | - |
| The Iron Mountain Companies Welfare Plan | - | 8,106 | - | - | - |
| THE IRON MOUNTAIN PROFIT SHARING/401K PLAN | - | 0 | - | - | - |
| 1999 | 6 | 5,719 | $40,212,013 | $9,600,100 | $1,679iApproximate average salary by contribution assumption: employee only about $41,966 at 4% or $27,977 at 6%; with 50% employer match about $27,977 at 4% or $18,651 at 6%; with 100% employer match about $20,983 at 4% or $13,989 at 6%. |
| The Iron Mountain Companies 401K Plan | - | 5,455 | $32,048,184 | $9,583,748 | $1,757iApproximate average salary by contribution assumption: employee only about $43,922 at 4% or $29,281 at 6%; with 50% employer match about $29,281 at 4% or $19,521 at 6%; with 100% employer match about $21,961 at 4% or $14,641 at 6%. |
| Arcus Inc. 401K Profit Sharing Plan | - | 569 | $8,163,829 | $16,352 | $29iApproximate average salary by contribution assumption: employee only about $718 at 4% or $479 at 6%; with 50% employer match about $479 at 4% or $319 at 6%; with 100% employer match about $359 at 4% or $239 at 6%. |
| Iron Mountain Inc. Group Long Term Disability Plan | - | 0 | - | - | - |
| Iron Mountain Inc. Group Accidental Death and Dismemberment Plan | - | 0 | - | - | - |
| The Iron Mountain Companies Welfare Plan | - | 5,719 | - | - | - |
| Pierce Leahy Corp. Employee Health Plan | - | 1,741 | - | - | - |