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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

970

£15.4420

965

£15.4420

777

d)

Aggregated information

2,712

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

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 notional interest in ADSs following the re-investment of dividends paid to shareholders on 9 April 2020 on ADSs held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$38.8800

559

$38.8800

439

d)

Aggregated information

998

Aggregated volume Price

$38.8800

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

New York Stock Exchange (XNYS)

1.

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

a)

Name

Mr R 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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

205

£15.4420

253

£15.4420

245

d)

Aggregated information

703

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Ms D Conrad

b)

Position/status

SVP Human Resources

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

101

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-04-14

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

Senior Vice President 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

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

ISIN: GB0009252882

b)

Nature of the transaction

Increase in notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

144

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-04-14

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

Senior Vice President 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 notional interest in ADSs following the re-investment of dividends paid to shareholders on 9 April 2020 on ADSs held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$38.8800

48

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-04-14

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

107

£15.4420

106

£15.4420

76

d)

Aggregated information

289

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Ms S Jackson

b)

Position/status

SVP, Global Communications & CEO Office

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

61

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

London Stock Exchange (XLON)

1.

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

a)

Name

Mr I Mackay

b)

Position/status

Chief Financial 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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

524

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

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 notional interest in ADSs following the re-investment of dividends paid to shareholders on 9 April 2020 on ADSs held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$38.8800

100

$38.8800

94

$38.8800

80

d)

Aggregated information

274

Aggregated volume Price

$38.8800

e)

Date of the transaction

2020-04-14

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

195

£15.4420

269

£15.4420

235

d)

Aggregated information

699

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

199

£15.4420

239

£15.4420

172

d)

Aggregated information

610

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

86

£15.4420

122

d)

Aggregated information

208

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

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 notional interest in ADSs following the re-investment of dividends paid to shareholders on 9 April 2020 on ADSs held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$38.8800

33

$38.8800

119

$38.8800

82

d)

Aggregated information

234

Aggregated volume Price

$38.8800

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

New York Stock Exchange (XNYS)

1.

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

a)

Name

Mr P 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 notional interest in Ordinary Shares following the re-investment of dividends paid to shareholders on 9 April 2020 on Ordinary Shares held in the Company's Deferred Annual Bonus Plan.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£15.4420

134

£15.4420

140

£15.4420

99

d)

Aggregated information

373

Aggregated volume Price

£15.4420

e)

Date of the transaction

2020-04-14

f)

Place of the transaction

London Stock Exchange (XLON)