GlaxoSmithKline PLC — Director's Dealing 2011

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For period ending July 2011

GlaxoSmithKline plc

(Name of registrant)

980 Great West Road, Brentford, Middlesex, TW8 9GS

(Address of 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

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Indicate by check mark whether the registrant by furnishing the

information contained in this Form is also thereby furnishing the

information to the Commission pursuant to Rule 12g3-2(b) under the

Securities Exchange Act of 1934.

Yes No x

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Notification of Transactions of Directors, Persons Discharging Managerial Responsibility or Connected Persons

I give below details of an increase in interests in the Ordinary shares of GlaxoSmithKline plc in respect of the personal holdings of the under-mentioned persons at a price of 1369.51 pence per Ordinary share, following the re-investment of the dividend paid to shareholders on 7 July 2011.

The Company and the above named persons were advised of this information on 11 July 2011.

This notification relates to a transaction notified in accordance with Disclosure and Transparency Rule 3.1.4R(1)(a) and (c).

V A Whyte

Company Secretary

11 July 2011

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 authorised.

GlaxoSmithKline plc

(Registrant)

Date: July 11, 2011

By: VICTORIA WHYTE

Victoria Whyte

Authorised Signatory for and on

behalf of GlaxoSmithKline plc