EXHIBIT 21
IRON MOUNTAIN INCORPORATED
SUBSIDIARIES
JURISDICTION OF
SUBSIDIARY ORGANIZATION
Iron Mountain Records Management, Inc. Delaware
. Iron Mountain Records Management of Michigan, Inc. Delaware
. Iron Mountain/National Underground Storage, Inc. Delaware
. Iron Mountain Consulting Services, LLC Delaware
. Iron Mountain of Maryland LLC Delaware
. IM Billerica, Inc. Massachusetts
. Arcus Data Security, Inc. Delaware
. . Arcus Data Security LLC Delaware
. . Iron Mountain Global, Inc. Delaware
. . . Iron Mountain Global LLC Delaware
. . . . Iron Mountain Mexico, S.A. de R.L. de C.V.(1) Mexico
. . . . . Sistemas de Archivo Corporativo, S.A. de R.L. de C.V. ("SAC")(2) Mexico
. . . . . . Sistemas de Archivo, S.A. de R.L. de C.V. Mexico
. . . . . . Sistemas de Archivo de Mexico, S.A. de R.L. de C.V. Mexico
. . . . Iron Mountain (Netherlands) B.V. Netherlands
. . . . . Iron Mountain (UK) Ltd. United Kingdom
. . . . . . Iron Mountain Europe Limited ("IME")(3) United Kingdom
. . . . . . . Document and Information Management Services, Ltd. United Kingdom
. . . . . . . . Iron Mountain Holdings (France), SNC(4) France
. . . . . . . . . Iron Mountain (France), S.A. France
. . . . . . . . . . MAP, S.A. France
. . . . . . . . . . . BDM S.A. France
. . . . . . . . . . . . FIME S.A. France
. . . . . . . . . . . . . Memogarde, S.A. France
. . . . . . . . . . . . . France Telesauveguard, S.A. France
. . . . . . . . . . . . . Societe Civile Immobiliere du Chemin Cornillon France
. . . . . . . The Document Storage Company Limited United Kingdom
. . . . . . . British Data Management, Ltd. United Kingdom
. . . . . . . . Miller Data Management Limited United Kingdom
. . . . . . . . Kestrel Data Services Limited United Kingdom
. . . . . . . . . Kestrel Data UK Limited United Kingdom
. . . . . . . . . . Kestrel Reprographics Limited United Kingdom
. . . . . . . . . . Kestrel Data Storage & Management Limited United Kingdom
. . . . . . . Arcus Data Security Limited United Kingdom
. . . . . . . Secur' Archiv Aktenmanagement GmbH Germany
. . . . . . . Stortex (Holdings) Limited Scotland
. . . . . . . . Stortex Limited United Kingdom
. . . . . . . . JAD 93 Limited United Kingdom
. . . . . . . Iron Mountain (Holdings) Europe Limited United Kingdom
. . . . . . . . Iron Mountain Espana, S.A. Spain
. . . . . . . . . Innovator Projects, S.A. Spain
. . . . . . . . . . Datavault, S.A.(5) Spain
. . . . . . . . . . . Datavault Iberica, S.A. Spain
. . . . . . . . . . . Datavault Madrid, S.A. Spain
. . . . . . . . . . . Datavault Cantabrico, S.A. Spain
. . . . . . . . . . . Datavault Aragon, S.A. Spain
. . . . . . . . . . . Datavault Andalucia, S.A. Spain
Iron Mountain Records Management (Puerto Rico), Inc. Puerto Rico
DSI Technology Escrow Services, Inc. Delaware
Arcus Staffing Resources, Inc. Delaware
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Advanced Box, Inc. Delaware
Monarch Box, Inc. Delaware
Pierce Maryland, L.L.C. Delaware
Iron Mountain Canada Corporation Nova Scotia
. Pierce Leahy Command Box Company Nova Scotia
. Docuguard Holdings Limited(6) Cypress
. . Docuguard Kft. Hungary
. . Docuguard CR-s.r.o.(7) Czech Republic
Archivex Limited Nova Scotia
. Archivex Box Company Limited Alberta
Pierce Leahy Europe Limited United Kingdom
. Silver Sky Jersey
. Datavault Holdings Limited United Kingdom
. . Datavault Limited(8) Scotland
. . . Datavault (NW) Limited Scotland
. . . Datavault (SW) Limited United Kingdom
Eurostorage Dossier en Arche f beheer BV(9) Netherlands
Sabero Pierce Archive Limited(10) India
Pierce Leahy Chile S.A.(11) Chile
. Pierce Leahy Peru(12) Peru
PLRH, Inc. Pennsylvania
Upper Providence Venture I, L.P.(13) Pennsylvania
(1) Iron Mountain Mexico, S.A. de R.L. de C.V. is owned 99.9% by Iron
Mountain Global, Inc. and 0.1% by Iron Mountain Global, LLC.
(2) SAC is owned 50.1% by Iron Mountain Mexico, S.A. de R.L. de C.V. and
49.9% by Padilla & Perez, Sistemas de Archivos S.A. de C.V.
(3) IME is owned 50.1% by Iron Mountain (UK) Ltd. and 49.9% by Mentmore
Abbey PLC.
(4) Document and Information Management Services, Ltd. and Miller Data
Management Limited together own 99.9% and 0.1%, respectively, of Iron
Mountain Holdings (France), SNC.
(5) Innovator Projects, S.A. owns 70.83% of Datavault, S.A., and is party to
an agreement to acquire the remainder of the stock.
(6) Iron Mountain Canada Corporation owns 25%.
(7) Docuguard Holdings Limited owns 95%.
(8) Datavault Holdings Limited owns 72.9%; Pierce Leahy Europe Limited owns
20.6%; Silver Sky owns 6.5%.
(9) Iron Mountain Incorporated owns 20%.
(10) Iron Mountain Incorporated owns an estimated 20%.
(11) Iron Mountain Incorporated owns 20%.
(12) Pierce Leahy Chile owns 38%; Iron Mountain Incorporated owns 12%.
(13) PLRH, Inc. owns 1% general partner interest. Iron Mountain Incorporated
owns 54% limited partner interest.
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