Director/PDMR Shareholding

1.

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

a)

Name

Philip Hampton

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

f)

Place of the transaction

n/a

1.

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

a)

Name

Professor Sir Roy Anderson

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

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 Independent Non-Executive Directors for the period of service from 1 April 2017 to 30 June 2017.

c)

Price(s) and

volume(s)

d)

Aggregated information

Aggregated volume Price

n/a (single transaction)

e)

Date of the transaction

2017-07-26

f)

Place of the transaction

n/a