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): December 21, 2007

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.):

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

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

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

[  ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.f13e-4(c))

Item 8.01.  Other Events

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

Item 9.01.  Financial Statements and Exhibits

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

99.01                Press Release dated December 21, 2007

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: December 21, 2007

EXHIBIT INDEX
Number	Description
99.01	Press Release dated December 21, 2007

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

Basingstoke, UK and Philadelphia, US – December 21, 2007– Shire plc (LSE: SHP, NASDAQ: SHPGY, TSX: SHQ), the global specialty biopharmaceutical company,

Notification of the Exercise of an Option and Acquisition of Shares by a Person Discharging Managerial Responsibilities.

The Company announces that on 21 December 2007 it was notified by Mrs Anita Graham, Executive Vice President, Corporate Business Services and Chief Administrative Officer of the acquisition in London on that day, of ordinary shares in the Company, following the exercise on the same day of an option over 10,432 ordinary 5p shares in the capital of the Company at an exercise price of £5.26.

10,432 ordinary 5p shares in the Company were acquired by Mrs Graham being 0.002% of the issued shares of that class.  As a result of this transaction, Mrs Graham has a total interest of 12,341 ordinary shares in the Company being 0.0022% of the issued shares of that class.

T May

Company Secretary

For further information please contact:

Investor Relations	Cléa Rosenfeld (Rest of the World)	+44 1256 894 160
	Eric Rojas (North America)	+1 484 595 8252
Media	Jessica Mann (Rest of the World)	+44 1256 894 280
	Matthew Cabrey (North America)	+1 484 595 8248

Notes to editors

SHIRE PLC

Shire’s strategic goal is to become the leading specialty biopharmaceutical company that focuses on meeting the needs of the specialist physician.  Shire focuses its business on attention deficit and hyperactivity disorder (ADHD), human genetic therapies (HGT), gastrointestinal (GI) and renal diseases. The structure is sufficiently flexible to allow Shire to target new therapeutic areas to the extent opportunities arise through acquisitions.  Shire’s in-licensing, merger and acquisition efforts are focused on products in niche markets with strong intellectual property protection either in the US or Europe.  Shire believes that a carefully selected portfolio of products with strategically aligned and relatively small-scale sales forces will deliver strong results.

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