Spirent

Overview

• Industrytelecommunications¹
• HeadquartersCrawley¹
• Websitewww.spirent.com
• Listed onLondon Stock Exchange¹

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Spirent Communications plc is a British multinational telecommunications testing company headquartered in Crawley, West Sussex, in the United Kingdom. It was listed on the London Stock Exchange until it was acquired by Keysight in October 2025.²

Corporate structure

Spirent sits at the top of its group. 2 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Spirent reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

• Radvision

Things Wikidata records the company as owning, with the share when stated.¹

Subsidiaries and ownership

Also owns

• Radvision

From Wikidata.¹

Timeline

1. 1936Founded Founded¹

Links

• Websitewww.spirent.com¹
• X (Twitter)x.com/Spirent¹
• WikipediaSpirent
• WikidataQ7577810