Director/PDMR Shareholding

1.

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

a)

Name

Sir Jonathan Symonds

b)

Position/status

Non-Executive Chairman

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

Acquisition of notional Ordinary Shares under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£13.50

3,240.741

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Mr Charles Bancroft

b)

Position/status

Independent Non-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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Acquisition of notional ADSs under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$35.29

866.616

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Mr Vindi Banga

b)

Position/status

Senior Independent Non-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

Acquisition of notional Ordinary Shares under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£13.50

671.296

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Dr Vivienne Cox

b)

Position/status

Independent Non-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

Acquisition of notional Ordinary Shares under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£13.50

625.000

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Ms Lynn Elsenhans

b)

Position/status

Independent Non-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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Acquisition of notional ADSs under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$35.29

615.753

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Dr Laurie Glimcher

b)

Position/status

Independent Non-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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Acquisition of notional ADSs under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$35.29

1,140.284

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Dr Jesse Goodman

b)

Position/status

Independent Non-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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Acquisition of notional ADSs under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$35.29

376.294

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Ms Judy Lewent

b)

Position/status

Independent Non-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

American Depositary Shares ('ADSs')

ISIN: US37733W1053

b)

Nature of the transaction

Acquisition of notional ADSs under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

$35.29

399.099

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A

1.

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

a)

Name

Mr Urs Rohner

b)

Position/status

Independent Non-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

Acquisition of notional Ordinary Shares under the share allocation arrangements for Non-Executive Directors for the period of service from 1 July 2020 to 30 September 2020.

c)

Price(s) and volume(s)

Price(s)

Volume(s)

£13.50

625.000

d)

Aggregated information

N/A (single transaction)

Aggregated volume Price

e)

Date of the transaction

2020-10-28

f)

Place of the transaction

N/A