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RNS Number : 5966V Spirent Communications PLC 15 August 2025
TR-1: Standard form for notification of major holdings
1. Issuer Details
ISIN
GB0004726096
Issuer Name
SPIRENT COMMUNICATIONS PLC
UK or Non-UK Issuer
UK
2. Reason for Notification
An acquisition or disposal of voting rights
3. Details of person subject to the notification obligation
Name
JPMorgan Chase & Co.
City of registered office (if applicable)
Country of registered office (if applicable)
US
4. Details of the shareholder
Name City of registered office Country of registered office
J.P. Morgan Securities plc
5. Date on which the threshold was crossed or reached
13-Aug-2025
6. Date on which Issuer notified
15-Aug-2025
7. Total positions of person(s) subject to the notification obligation
% of voting rights attached to shares (total of 8.A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached 4.873036 0.353485 5.226521 30374118
Position of previous notification (if applicable) Below minimum threshold Below minimum threshold Below minimum threshold
8. Notified details of the resulting situation on the date on which the
threshold was crossed or reached
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible) Number of direct voting rights (DTR5.1) Number of indirect voting rights (DTR5.2.1) % of direct voting rights (DTR5.1) % of indirect voting rights (DTR5.2.1)
GB0004726096 28319616 4.873036
Sub Total 8.A 28319616 4.873036%
8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))
Type of financial instrument Expiration date Exercise/conversion period Number of voting rights that may be acquired if the instrument is % of voting rights
exercised/converted
Sub Total 8.B1
8B2. Financial Instruments with similar economic effect according to
(DTR5.3.1R.(1) (b))
Type of financial instrument Expiration date Exercise/conversion period Physical or cash settlement Number of voting rights % of voting rights
Cash-settled Equity Swap 15/04/2026 15/04/2026 Cash 303602 0.052228
Cash-settled Equity Swap 28/05/2026 28/05/2026 Cash 1273 0.000219
Cash-settled Equity Swap 23/06/2026 23/06/2026 Cash 700000 0.120441
Cash-settled Equity Swap 19/08/2026 19/08/2026 Cash 26568 0.004567
Cash-settled Equity Swap 26/08/2026 26/08/2026 Cash 22186 0.003815
Cash-settled Equity Swap 02/09/2026 02/09/2026 Cash 650 0.000111
Cash-settled Equity Swap 18/09/2026 18/09/2026 Cash 12087 0.002078
Cash-settled Equity Swap 30/05/2028 30/05/2028 Cash 238 0.000040
Cash-settled Equity Swap 02/05/2030 02/05/2030 Cash 987898 0.169986
Sub Total 8.B2 2054502 0.353485%
9. Information in relation to the person subject to the notification
obligation
2. Full chain of controlled undertakings through which the voting rights
and/or the financial instruments are effectively held starting with the
ultimate controlling natural person or legal entities (please add additional
rows as necessary)
Ultimate controlling person Name of controlled undertaking % of voting rights if it equals or is higher than the notifiable threshold % of voting rights through financial instruments if it equals or is higher Total of both if it equals or is higher than the notifiable threshold
than the notifiable threshold
JPMorgan Chase & Co. J.P. Morgan Securities plc 4.870405 5.223890%
JPMorgan Chase & Co. J.P. Morgan SE
JPMorgan Chase & Co. J.P. Morgan Securities LLC
10. In case of proxy voting
Name of the proxy holder
The number and % of voting rights held
The date until which the voting rights will be held
11. Additional Information
Chain of controlled undertakings:
JPMorgan Chase & Co.
JPMorgan Chase Bank, National Association (100%)
J.P. Morgan International Finance Limited (100%)
J.P. Morgan Capital Holdings Limited (100%)
J.P. Morgan Securities plc (100%)
JPMorgan Chase & Co.
JPMorgan Chase Holdings LLC (100%)
J.P. Morgan Broker-Dealer Holdings Inc. (100%)
J.P. Morgan Securities LLC (100%)
JPMorgan Chase & Co.
JPMorgan Chase Bank, National Association (100%)
J.P. Morgan International Finance Limited (100%)
J.P. Morgan SE (100%)
12. Date of Completion
15-Aug-2025
13. Place Of Completion
London
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