Substantial Shareholders* % Held
Ameriprise Financial, Inc.  17.53
Aviva plc  7.44
Standard Life Investments Ltd 5.29
Franklin Templeton Fund Management Limited  5.18
PrimeStone Capital LLP  5.10
AXA Investment Managers SA  4.99
Brandes Investment Partners (various clients) 4.99
Prudential plc  4.98
Aberforth Partners  4.96
Neptune Investment Management Ltd  4.87
Artemis Investment Management Limited 4.77
Schroders plc  4.41
Teleois Capital Partners LLC  4.03
Sun Life Assurance Company of Canada (UK) Ltd 3.82
Kames Capital (fka Global AEGON Asset Management Group)  3.03


*At 28 August 2019 Spirent had been notified of the following significant interest in its Ordinary Shares pursuant to Disclosure and Transparency Rule 5.