Director/PDMR Shareholding

1.

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

a)

Name

Ms E Walmsley

b)

Position/status

Chief Executive Officer

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

2340.000 

£15.6560

e)

Date of the transaction

2019-04-12 

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Dr H Barron

b)

Position/status

Chief Scientific Officer and President, R&D

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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Increase in interest in American Depository Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on American Depository Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

New York Stock Exchange (XNYS)

1.

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

a)

Name

Mr R G Connor

b)

Position/status

President, Global Vaccines

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

701.000 

£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr S P Dingemans

b)

Position/status

Executive Director

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

1766.000 

£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr J Ford

b)

Position/status

SVP and General Counsel

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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Increase in interest in American Depository Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on American Depository Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

New York Stock Exchange (XNYS)

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

370.000 

£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr B McNamara

b)

Position/status

CEO, GSK Consumer Healthcare

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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Increase in interest in American Depository Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on American Depository Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

284.000 

$ 40.9400

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

New York Stock Exchange (XNYS)

1.

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

a)

Name

Mr L Miels

b)

Position/status

President, Global Pharmaceuticals

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

436.000£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr D Redfern

b)

Position/status

Chief Strategy Officer

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

626.000 

£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr R Simard

b)

Position/status

President, Pharmaceuticals Supply Chain

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Ms K Terrell

b)

Position/status

Chief Digital & Technology Officer

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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Increase in interest in American Depository Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on American Depository Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

146.000

$ 40.9400

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

New York Stock Exchange (XNYS)

1.

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

a)

Name

Mr P C Thomson

b)

Position/status

President, Global Affairs

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

Ordinary shares of 25 pence each ('Ordinary Shares')

ISIN: GB0009252882

b)

Nature of the transaction

Increase in interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 11 April 2019 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

d)

Aggregated information

Aggregated volume Price

359.000 

£15.6560

e)

Date of the transaction

2019-04-12

f)

Place of the transaction

London Stock Exchange (XLON)