Private company
KeySpan
Logo: KeySpan, Public domain, via Wikimedia Commons3
American natural gas company
KeySpan Corporation was the fifth largest distributor of natural gas in the United States. KeySpan was formed in 1998 as a result of the merger of Brooklyn Union Gas Company (founded 1895 by merging several smaller companies) and Long Island Lighting Company (LILCO), and briefly operated under the name MarketSpan following the merger.2 It ceased to exist in 2007.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
- HeadquartersNew York City1
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KeySpan Corporation was the fifth largest distributor of natural gas in the United States. KeySpan was formed in 1998 as a result of the merger of Brooklyn Union Gas Company (founded 1895 by merging several smaller companies) and Long Island Lighting Company (LILCO), and briefly operated under the name MarketSpan following the merger. On November 8, 2000, KeySpan acquired Eastern Enterprises, Eastern's natural gas distribution subsidiaries including Boston Gas Company, Colonial Gas Company and Essex Gas Company; Eastern's unregulated businesses including ServicEdge Partners, the largest unregulated provider of residential HVAC equipment installation and services in Massachusetts; and EnergyNorth Natural Gas in New Hampshire. It also was the operator of the Long Island Power Authority's electrical grid, which had previously been part of LILCO before LIPA took it over in 1998. KeySpan had its headquarters in Brooklyn, New York, USA and employed 9,700 people.2
Products and brands
- natural gas
Listed on Wikidata.1
Acquisitions
- Succeeded Brooklyn Union Gas1
- Succeeded Long Island Lighting Company1
Timeline
Links
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataKeySpan on Wikidata
- 2WikipediaKeySpan on Wikipedia
- 3Wikimedia CommonsKeySpan logo by KeySpan, Public domain
- 4Wikimedia CommonsKeySpan photo by Jim.henderson, CC0