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IndustryReal estate investment trust
Founded2001; 21 years ago (2001) (as CRG West)
HeadquartersDenver, Colorado, U.S.
ProductsData centers
RevenueIncrease US$572 million (2019)
Decrease US$99 million (2019)
Total assetsIncrease US$2.10 billion (2019)
Total equityDecrease US$213 million (2019)
Number of employees
464 (2019)
ParentAmerican Tower
Footnotes / references

CoreSite, a subsidiary of American Tower, owns carrier-neutral data centers and provides colocation and peering services.

As of June 24, 2022 the company owned 27 operating data center facilities in 10 markets comprising over 4.6 million net rentable square feet. The properties are in Boston, Chicago, Denver, Los Angeles, Miami, New York City, Northern Virginia, San Francisco/San Jose, California, Santa Clara, California, Atlanta, Georgia, Orlando, Florida and the Washington, D.C. areas.[1] The company has over 1,350 customers including enterprises, network operators, cloud providers, and supporting service providers.[1]


The company was founded in 2001 as CRG West at two of the West coast's original carrier hotels: Market Post Tower and One Wilshire.

In August 2005, the company opened a facility in Washington, D.C.[citation needed]

In May 2007, the company acquired properties in Boston and Chicago. It also purchased a tract of land in Santa Clara, with the intent of developing a 50-megawatt data center Coronado campus there.[1]

In June 2009, the company changed its name to CoreSite.[1]

In September 2010, the company became a public company via an initial public offering.[2]

In April 2012, the company acquired Comfluent and entered the Denver market.[3]

In August 2012, Coresite became the first AMS-IX enabled data center operator in North America.[4]

In July 2016, Tom Ray, the chief executive officer of the company, retired and was replaced by Paul Szurek, lead independent director.[5]

In August 2016, the company announced the $60 million acquisition of the 22-acre Sunrise Technology Park from Brookfield Office Properties.[6]

In December 2021, the company was acquired by American Tower.[7][8]

See also[edit]


  1. ^ a b c d e "CoreSite Realty Corporation 2020 Form 10-K Annual Report". U.S. Securities and Exchange Commission.
  2. ^ "CoreSite Realty Flat in Debut". The New York Times. September 24, 2010.
  3. ^ "CoreSite Realty buys Comfluent". American City Business Journals. April 20, 2012.
  4. ^ "CoreSite announces relationship with AMS-IX". Data Economy. August 3, 2012.
  5. ^ Miller, Ben (July 28, 2016). "CoreSite CEO retires, replaced by board director". American City Business Journals.
  6. ^ Neibauer, Michael (August 12, 2016). "CoreSite plans big data center expansion in Reston with $60M land buy". American City Business Journals.
  7. ^ "American Tower Completes Acquisition of CoreSite Realty Corporation" (Press release). Business Wire. December 28, 2021.
  8. ^ Naqvi, Ali Imran (December 29, 2021). "American Tower completes CoreSite Realty acquisition". S&P Global.