Director/PDMR Shareholding

1.

Details of PDMR/person closely associated with them ('PCA')

a)

Name

Mr N Hirons

b)

Position/status

SVP, Global Ethics & Compliance

c)

Initial notification/

amendment

Initial notification

2.

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

GlaxoSmithKline plc

b)

LEI

5493000HZTVUYLO1D793

3.

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transaction(s) has been conducted

a)

Description of the financial  instrument

GlaxoSmithKline plc American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

The lapse of options over 4,600 ADSs, granted on 19 February 2008 under the GlaxoSmithKline Share Option Plan, at an option price of $44.75.

c)

Price(s) and volume(s)

d)

Aggregated information 

Aggregated volume Price

4,600n/a

e)

Date of the transaction

2018-02-19

f)

Place of the transaction

n/a