RNS Number : 8700O

Spirent Communications PLC

02 June 2015

TR-1: Notifications of Major Interests in Shares
1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:		Spirent Communications plc
2. Reason for notification (yes/no)
An acquisition or disposal of voting rights			Yes
An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached			No
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments			No
An event changing the breakdown of voting rights			No
Other (please specify):___________________________			No
3. Full name of person(s) subject to notification obligation:	Ameriprise Financial, Inc. and its group
4. Full name of shareholder(s) (if different from 3):	See additional information under 13.
5. Date of transaction and date on which the threshold is crossed or reached:	29 May 2015
6. Date on which issuer notified:	01 June 2015
7. Threshold(s) that is/are crossed or reached:	Above the threshold of 13%

8: Notified Details
A: Voting rights attached to shares
Class/type of shares If possible use ISIN code	Situation previous to the triggering transaction		Resulting situation after the triggering transaction
	Number of shares	Number of voting rights	Number of shares	Number of voting rights		Percentage of voting rights
			Direct	Direct	Indirect	Direct	Indirect
GB0004726096        73,957,502 73,957,502 533,352 533,352 79,158,453 0.087%                         12.940%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date	Exercise/ conversion period	No. of voting rights that may be acquired if the instrument is exercised/converted.	Percentage of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Exercise Price	Expiration date	Exercise / conversion period	No. of voting rights instrument refers to	Percentage of voting rights
					Nominal	Delta

Total (A+B+C)
Number of voting rights	Percentage of voting rights
79,691,805	13.027%

9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable:

Ameriprise Financial, Inc., which through intermediate holding companies controls the voting rights of Columbia Management Investment Advisers, Columbia Wanger Asset Management, Threadneedle Management Luxembourg S.A. and Threadneedle Asset Management Holdings Ltd, which itself controls the voting rights of Threadneedle Asset Management Ltd, Threadneedle International Ltd and Threadneedle Pensions Ltd.

Proxy Voting:
10. Name of proxy holder:	N/A
11. Number of voting rights proxy holder will cease to hold:	N/A
12. Date on which proxy holder will cease to hold voting rights:	N/A

13. Additional information:

Registered Owner

Littledown Nominees Ltd	A/c 41407	21,006,553
HSBC Global Custody Nominee (UK) Limited	A/c 740190	228,796
HSBC Global Custody Nominee (UK) Limited	A/c 739874	1,147,265
HSBC Global Custody Nominee (UK) Limited	A/c 740311	121,343
State Street Nominees Limited	A/c 2GQ6	31,801,851
Nortrust Nominees LTD	A/c ZLA05	1,689,635
Nortrust Nominees LTD	A/c ZLA07	8,739,371
Littledown Nominees Ltd	A/c 07197	533,352
Littledown Nominees Ltd	A/c 10479	14,716
Nortrust Nominees LTD	A/c ZLA12	321,808
Nortrust Nominees LTD	A/c ZLA14	99,847
Nortrust Nominees LTD	A/c 34789	992,960
Littledown Nominees Ltd	A/c 18667	3,221,462
Littledown Nominees Ltd	A/c 10492	6,969,221
Littledown Nominees Ltd	A/c 10488	1,734,241
Littledown Nominees Ltd	A/c 10490	1,069,384

14 Contact name:

Mark Powney, Threadneedle Group

15. Contact telephone name:

+44 (0) 1793 363 135

C: Additional information

Contact at Issuer: Michelle Balch, Assistant Company Secretary, Spirent Communications plc

Telephone: 01293 767676

This information is provided by RNS

The company news service from the London Stock Exchange

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