FORM 6-K SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 December 21, 2007 Commission File Number 001-14978 SMITH & NEPHEW plc (Registrant's name) 15 Adam Street London, England WC2N 6LA (Address of registrant's principal executive offices) [Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.] Form 20-F X Form 40-F --- --- [Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1).] Yes No X --- --- [Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7).] Yes No X --- --- [Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing information to the Commission pursuant to Rule 12g3-2 (b) under the Securities Exchange Act of 1934.] Yes No X --- --- If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2 (b) : 82- n/a. SIGNATURES 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 thereunto duly authorized. Smith & Nephew plc (Registrant) Date: December 21, 2007 By: /s/ Paul Chambers ----------------- Paul Chambers Company Secretary Smith & Nephew PLC 21 December 2007 Smith & Nephew PLC - Transactions in Own Shares Smith & Nephew PLC (the "Company") announces that it has commenced a non-discretionary programme to buy back ordinary shares during the period which commences on 21 December 2007 and ends on 6 February 2008. The purchased shares will be held as treasury shares. The buy back programme will be managed by an independent third party, which makes its trading decisions independently of, and uninfluenced by, the Company. Any acquisitions will be effected within certain pre-set parameters, and in accordance with both the Company's general authority to repurchase shares and Chapter 12 of the Listing Rules which requires that the maximum price paid be limited to no more than 5 per cent above the average market value for the shares as derived from the London Stock Exchange Daily Official List for the five business days immediately prior to such purchase. The Company confirms that it currently has no unpublished price sensitive information. PR Chambers Company Secretary 0207 401 7646