Vanguard's Disclosure on Spirent Communications Stake

The Vanguard Group, Inc. has disclosed its position in Spirent Communications plc according to Form 8.3 under Rule 8.3 of the UK Takeover Code. As of September 23, 2025, Vanguard reported owning 31,519,977 ordinary shares of Spirent, representing a 5.34% stake in the company.

The disclosure includes a recent purchase of 3,822 shares at a price of 1.96 GBP per share. No additional transactions involving derivatives or options were reported, and no agreements or understandings related to Spirent’s shares were specified.

This disclosure adheres to the regulatory requirements for substantial stakes, ensuring transparency in potential takeover situations. No supplemental open position form was attached, indicating no other significant securities dealings or positions.