EXHIBIT 99

Iron Mountain Incorporated Declares Three-for-Two Stock Split


BOSTON,  Dec 6, 2001 -- Iron Mountain  Incorporated  (NYSE:  IRM), the leader in
records and information management services,  announced today that the Company's
Board of  Directors,  at a meeting  held  yesterday,  authorized  and approved a
three-for-two  stock split  effected in the form of a dividend on the  Company's
Common Stock,  par value $.01 per share (the "Common  Stock").  Shares of Common
Stock will be issued on December 31, 2001, to all  stockholders  of record as of
the close of business on December 17, 2001. Any fractional shares resulting from
the dividend will be paid in cash. The stock split will increase Iron Mountain's
total shares  outstanding  from  approximately  56 million to  approximately  84
million.

Richard Reese,  Chairman and CEO,  stated,  "In making its decision to split the
stock,  the Board of Directors  considered  the continuing  appreciation  in the
Company's stock price coupled with its solid financial performance.  This action
reflects the Board's  continued  confidence in the long-term  performance of the
business.  We also believe  that the stock split will broaden the  marketability
and  distribution of our stock."

As an international, full service provider of records and information management
services,  Iron Mountain  currently  provides  services to over 125,000 customer
accounts in 80 markets in the United States and 44 markets outside of the United
States.  The Company  employs over 10,000  people and operates  over 650 records
management facilities in the United States, Canada, Europe and Latin America.

CONTACT:          John F. Kenny, Jr.
                  Executive Vice President and
                  Chief Financial Officer
                  (617) 535-4799