This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) The topic of this article may not meet Wikipedia's notability guidelines for companies and organizations. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be merged, redirected, or deleted.Find sources: "AlliedBarton" – news · newspapers · books · scholar · JSTOR (March 2023) (Learn how and when to remove this template message) This article reads like a press release or a news article and may be largely based on routine coverage. Please help improve this article and add independent sources. (March 2023) (Learn how and when to remove this template message)

Company typePrivate
Pittsburgh, Pennsylvania, U.S.
Defunct2017 (2017)
FateMerged with Universal Services of America
SuccessorAllied Universal
HeadquartersConshohocken, Pennsylvania,
(archived 2013)

AlliedBarton was a Conshohocken, Pennsylvania-based security firm. The company was founded in 1957 as Allied Security, and in 2016 was merged with Santa Ana, California-based security and janitorial services company Universal Services of America to form Allied Universal.[1][2]


AlliedBarton was founded as Allied Security in 1957 in Pittsburgh, Pennsylvania as a provider of contracted security guards and related services.[3]

In 2000, King of Prussia, Pennsylvania-based Spectaguard acquired Allied Security and took on the Allied Security name.[4] The new company was reportedly the fourth largest security company in the United States, as well as the largest privately held security company in the US.[5]

In 2004, Allied Security acquired Malden, Massachusetts-based Security Systems Inc. (SSI) and Atlanta, Georgia-based Barton Protective Services to form AlliedBarton Security Services - creating the largest American-owned contract security services company in the United States.[6] In 2004 and again in 2008, Allied Barton bid but failed to acquire M & M Investigations & Enforcement Bureau of Toledo, Ohio.

In 2006, AlliedBarton acquired San Antonio, Texas-based manned guarding firm Initial Security for $73.6 million.[7]

In 2008, New York City-based investment group The Blackstone Group acquired AlliedBarton, for an undisclosed amount.[8]

In July 2015, Paris, France-based private investment firm Wendel acquired AlliedBarton from The Blackstone Group for US$1.67 billion.[9]

In 2016, AlliedBarton and Universal Services of America merged to form Allied Universal. In February 2017, the company officially began operations under its new name. After the merger, Allied Universal was considered the largest security company in North America.[10]


AlliedBarton provided uniformed security services.[1]


  1. ^ a b "How the nation's largest security-guard firm adapts to changing threats". LA Times. August 4, 2016. Retrieved January 18, 2021.
  2. ^ "Universal Services to Merge". OCBJ. May 3, 2016. Retrieved January 18, 2021.
  3. ^ Bray, Chad (June 30, 2015). "Wendel Agrees to Acquire AlliedBarton Security for $1.67 Billion". The New York Times. ISSN 0362-4331. Retrieved January 18, 2021.
  4. ^ "Allied-SpectaGuard changes name". Philadelphia Business Journal. August 16, 2000. Retrieved January 28, 2021.
  5. ^ "COMPANY NEWS; SPECTAGUARD SAYS IT HAS ACQUIRED ALLIED SECURITY". The New York Times. March 3, 2000. ISSN 0362-4331. Retrieved January 19, 2021.
  6. ^ "Allied Security to acquire Barton Protective Services - Atlanta Business Chronicle". Atlanta Business Chronicle. May 24, 2004. Retrieved January 18, 2021.
  7. ^ "AlliedBarton to buy Initial | Security Systems News". August 1, 2001. Retrieved January 18, 2019.
  8. ^ "Blackstone Nabs AlliedBarton". The New York Times. July 28, 2008. Retrieved January 18, 2021.
  9. ^ "French firm buys another Phila. co.: $670M+debt for AlliedBarton". Philadelphia Inquirer. July 1, 2015. Retrieved January 19, 2021.
  10. ^ Cosgrove, Anne (August 1, 2016). "New Allied Universal Formed, Offers Security Services". Facility Executive - Creating Intelligent Buildings. Retrieved February 1, 2017.