The Vanguard Group Discloses Position in Spirent Communications

The Vanguard Group, Inc. has submitted a Form 8.3 regarding its interest in Spirent Communications plc. As of 29 September 2025, Vanguard holds 31,426,681 ordinary shares, representing 5.33% of the company. The disclosure follows the guidelines of Rule 8.3 of the Takeover Code, applicable to entities with holdings of 1% or more in relevant securities.

The form does not cover any other parties involved in a possible takeover offer. Vanguard's latest transaction includes the purchase of 7,029 shares at 1.99 GBP per unit. There are no disclosed positions in stock-settled derivatives or cash-settled derivatives in Spirent.

No indemnity, option arrangements, or agreements on derivatives related to voting rights have been reported. Shawn Acker is assigned as the contact for this disclosure, which was filed on 30 September 2025.