Iron Mountain Inc. (NYSE: IRM) is an American enterprise information management services company founded in 1951 and headquartered in Boston, Massachusetts.

[5] He purchased a depleted iron ore mine and 100 acres (0.40 km2) of land in Kingston, New York for $9,000 in 1936, needing more space to grow his product.

Knaust saw a business opportunity, amidst widespread Cold War fears, in protecting corporate information from nuclear attack and other disasters.

The company was originally founded in 1951 as Iron Mountain Atomic Storage Corporation;[6] it opened its first underground "vaults" in 1951 and its first sales office in the Empire State Building, about 125 miles (201 km) south.

This first iteration of Iron Mountain was bankrupt by the early 1970s and was wholly acquired by Vincent J. Ryan through his holdings in Schooner Capital Corporation, Boston, Massachusetts.

Its breakthrough came in the mid-1980s, when it convinced Manufacturers Hanover Bank to move all its paper records out of Manhattan to an above-ground facility, a former strip mall in Port Ewen, New York.

In 1988, Iron Mountain extended its reach into 12 more U.S. markets by acquiring Bell & Howell Records Management, Inc.[8] The firm went public on January 31, 1996.

In February 2000, Iron Mountain Incorporated announced the completion of its acquisition of Pierce Leahy Corp. (NYSE:PLH) in a stock-for-stock merger valued at approximately $1.1 billion.

[13] In 2007 Iron Mountain acquired Stratify Inc.,[14] one of the larger e-discovery service providers at the production end of the Electronic Discovery Reference Model (EDRM).

[24] At the end of April 2015, Iron Mountain announced it would acquire Australian data protection services provider Recall Holdings for around $2.2 billion in cash and stock.

[33] In February 2021, the company purchased Infofort, an information management solutions provider in the Middle East, North Africa and Turkey (MENAT) region.

[38] Appearing at an event in the Oval Office alongside President Donald Trump in February 2025, Elon Musk criticized the OPM's use of this facility.

[citation needed] In April 2009, Iron Mountain's Digital Record Center for Images was recognized as a "Product of the Year" by the Massachusetts Network Communications Council in the "Cloud Computing, Virtualization and Data Warehousing/Storage category".

[56] The company has received media attention for losing or misplacing customer files and data, particularly tapes containing private information such as home addresses and Social Security numbers.