Keysight Completes £1.16 Billion Acquisition of Spirent Communications

Keysight Technologies has finalized its £1.16 billion (US $1.46 billion) acquisition of Spirent Communications, uniting two global leaders in network test and assurance. The deal, first announced earlier this year, officially closed following clearances from competition and regulatory authorities across the U.S., U.K., France, Germany, and China. Spirent’s shares will be delisted from the London Stock Exchange on October 17, 2025, with its business to be absorbed into Keysight’s Communications Solutions Group.

The merger strengthens Keysight’s portfolio in automated test and assurance by integrating Spirent’s expertise in satellite emulation, positioning, network automation, and cybersecurity testing. To satisfy antitrust conditions from the U.S. Department of Justice and China’s SAMR, Keysight agreed to divest Spirent’s high-speed Ethernet, network security, and channel emulation business lines, a process expected to conclude by October 16.

Satish Dhanasekaran, Keysight’s President and CEO, said: “Today marks a milestone for Keysight as we officially welcome Spirent into our company. By combining Keysight’s design, emulation, and test expertise with Spirent’s strengths in satellite emulation, positioning, and network automation, we are expanding the breadth of our portfolio to better serve our customers.”

• Transaction value: £1.16 billion (≈ US $1.46 billion)

• Spirent shareholders receive 202.5 pence per share (including 3.5 pence special dividend)

• Regulatory approvals obtained from DOJ, CMA, French Economy Ministry, Germany’s BMWK, and China’s SAMR

• Required divestitures include Spirent’s high-speed Ethernet and security test business lines

• Integration under Keysight’s Communications Solutions Group begins immediately

🌐 Analysis:

The completion solidifies Keysight’s position as a top-tier test and measurement supplier spanning the entire communications lifecycle—from physical layer validation to network automation and assurance. For Keysight, the acquisition bridges its traditional lab-based test business with Spirent’s field-deployed network assurance platforms, creating a more comprehensive offering across 5G, cloud, and AI-driven connectivity. Competitors such as VIAVI, EXFO, and Rohde & Schwarz are likely to face renewed pressure to expand automation and service-based capabilities amid industry consolidation.

Spirent Communications traces its origins to 1936, when it was founded in London as Goodliffe Electric Supplies. The company evolved over the decades through a series of mergers and transformations, eventually becoming Bowthorpe Holdings in the 1940s, focused on electrical components and cable accessories. By the late 20th century, Bowthorpe had diversified into telecommunications testing, recognizing the growing importance of digital communications. In 2000, the company formally rebranded as Spirent Communications, reflecting its focus on “spirit” and “enterprise” in the fast-emerging world of internet and mobile network technologies.

Throughout the 2000s and 2010s, Spirent established itself as a global leader in network, device, and service testing for telecommunications providers, equipment manufacturers, and government agencies. Its product portfolio expanded from traditional wireline testing to advanced wireless, positioning, and cybersecurity validation. Spirent played a key role in validating technologies underpinning 3G, 4G LTE, and eventually 5G networks. Strategic acquisitions—such as Radvision’s technology business, the GNSS simulator maker Spirent Positioning, and various test automation platforms—helped the company move from physical layer validation to end-to-end service assurance and automation.

In the 2020s, Spirent positioned itself at the center of the industry’s transition toward AI-driven automation, cloud-native assurance, and satellite connectivity testing. The company developed strong franchises in network automation, high-speed Ethernet testing, and GNSS emulation—capabilities that attracted Keysight Technologies’ attention as it sought to expand its design-to-deployment test portfolio.