Article · Wikipedia archive · Last revised Jun 2, 2026

OSIsoft

OSIsoft, LLC was a manufacturer of application software for real-time data management, called the PI System. Founded in 1980, OSIsoft was privately held and headquartered in San Leandro, California. In August 2020, it was announced that the UK-based production company AVEVA agreed to buy OSIsoft in a deal worth $5 billion; the purchase was subsequently completed on 19 March 2021 for a final consideration of £3,831.4 million.

Last revised
Jun 2, 2026
Read time
≈ 1 min
Length
256 w
Citations
6
Source
OSIsoft, LLC
Company type
Private
IndustryApplication software
Founded1980
FounderJ. Patrick Kennedy
DefunctMarch 19, 2021 (2021-03-19)1
FateAcquired
SuccessorAveva
HeadquartersSan Leandro, California, USA
Key people
J. Patrick Kennedy (CEO)
Michael Siemer (President)
ProductsPI System  · PI ProcessBook  · PI Server  · PI DataLink  · PI Vision
Number of employees
>1300 (2016)
Websiteosisoft.com

OSIsoft, LLC was a manufacturer of application software for real-time data management, called the PI System. Founded in 1980, OSIsoft was privately held and headquartered in San Leandro, California. In August 2020, it was announced that the UK-based production company AVEVA agreed to buy OSIsoft in a deal worth $5 billion;2 the purchase was subsequently completed on 19 March 2021 for a final consideration of £3,831.4 million.34

History

On January 5, 2011, OSIsoft announced a $135 million minority investment by Technology Crossover Ventures and Kleiner Perkins Caufield & Byers.5

Lit San Leandro, a business associated with OSIsoft, has built a fiber-optic network in the city of San Leandro, linking high tech and other businesses. They have also proposed providing a high-speed fiber-optic network for the industrial corridor in nearby Hayward.6

References

References

  1. "Completion of Acquisition of OSIsoft, LLC". tools.eurolandir.com. Archived from the original on 2021-07-09. Retrieved 2021-09-24.
  2. Provan, Sarah; Fildes, Nic (August 25, 2020). "Aveva to buy US tech group OSIsoft in $5bn deal". Financial Times. Retrieved August 25, 2020.
  3. "Completion of Acquisition of OSIsoft, LLC". tools.eurolandir.com. Archived from the original on 2021-07-09. Retrieved 2021-09-24.
  4. "Annual Report 2021" (PDF). AVEVA. Retrieved 24 September 2021.
  5. "News" (Press release).
  6. KQED Jan 18 2012 OSIsoft and Lit San Leandro Bringing Fiber-Optic to Tech Firms