GlaxoSmithKline PLC — Regulatory Filings 2012

May 8, 2012

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 May 2012

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 changes in interests in the Ordinary Shares of GlaxoSmithKline plc in respect of the under-mentioned persons, arising from the purchase of Ordinary Shares on 4 May 2012 following the reinvestment of dividends, on shares held within an ISA at a price of 1446.798 pence per Ordinary Share:

Sir Andrew Witty	54
Mr S M Bicknell	121
Mr E J Gray	11
Mr D S Redfern	25
Mrs V A Whyte	21

The Company and the above-mentioned persons were advised of this information on 8 May 2012.

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

V A Whyte

Company Secretary

8 May 2012

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: May 08, 2012

By: VICTORIA WHYTE

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Victoria Whyte

Authorised Signatory for and on

behalf of GlaxoSmithKline plc