8-K

UNITED STATES 

SECURITIES AND EXCHANGE COMMISSION 

Washington, D.C. 20549 

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  April 12, 2006

Shire plc

(Exact name of registrant as specified in its charter)

England and Wales

(State or other jurisdiction of incorporation)

0-29630	98-0484822
(Commission File Number)	(IRS Employer Identification No.)

Hampshire International Business Park, Chineham, Basingstoke,
Hampshire RG24 8EP England

(Address of principal executive offices)	(Zip code)
Registrant’s telephone number, including area code	44 1256 894 000

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2.):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events

     Shire plc has issued the press release attached as Exhibit 99.01 which is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits

                 (c) Exhibits. The following exhibit is filed herewith:

99.01 Press Release dated April 12, 2006

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

SHIRE PLC
By:	/s/ A C Russell
	Name:	Angus Russell
	Title:	Chief Financial Officer

Dated: April 12, 2006

EXHIBIT INDEX

Number	Description
99.01	Press Release dated April 12, 2006

EX-99.1

	EXHIBIT 99.01
Hampshire International Business Park Chineham Basingstoke Hampshire RG24 8EP United Kingdom Tel +44 (0)1256 894000 Fax +44 (0)1256 894708 www.shire.com
Press Release

12 April 2006

Shire plc (the “Company”)

The Company announces that, on 11 April 2006, it was notified, pursuant to sections 198 to 202 of the Companies Act 1985, that, on 11 April 2006, Prudential Assurance Company Limited was interested in 15,063,989 ordinary shares of £0.05 each in the capital of the Company. This holding represents 3.02 per cent of the issued ordinary share capital of the Company.

T May
Company Secretary

For further information please contact:

Investor Relations	Cléa Rosenfeld (Rest of the World)	+44 1256 894 160
	Brian Piper (North America)	+1 484 595 8252

Notes to editors

SHIRE PLC

Shire’s strategic goal is to become the leading specialty pharmaceutical company that focuses on meeting the needs of the specialist physician. Shire focuses its business on central nervous system, gastrointestinal, general products and human genetic therapies - all being areas in which Shire has a commercial presence. The structure is sufficiently flexible to allow Shire to target new therapeutic areas to the extent opportunities arise through acquisitions. Shire believes that a carefully selected portfolio of products with strategically aligned and relatively small-scale sales forces will deliver strong results. Shire’s strategy is to develop and market products for specialty physicians. Shire’s in-licensing and merger and acquisition efforts are focused on products in niche markets with strong intellectual property protection either in the US or Europe.

For further information on Shire, please visit the Company’s website: www.shire.com

Registered in England 2883758 Registered Office as above