FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

REPORT OF FOREIGN ISSUER

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of December 2018

Commission File Number 1-32575

Royal Dutch Shell plc

(Exact name of registrant as specified in its charter)

30, Carel van Bylandtlaan, 2596 HR The Hague

The Netherlands

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ☐.            No  ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-                

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

3^rd December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 3^rd December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-0312181704-A8B9_Shell_RNS_03.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

4^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 4^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-0412181713-91F1_Shell_RNS_04.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

5^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 5^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-0512181714-A72A_Shell_RNS_05.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

6^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 6^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-0612181827-E36B_Shell_RNS_06.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

7^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 7^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-0712181719-205A_Shell_RNS_07.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

10^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 10^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1012181719-0776_Shell_RNS_10.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

11^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 11^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1112181711-68C0_Shell_RNS_11.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

12^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 12^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1212181722-6679_Shell_RNS_12.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

13^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 13^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1312181719-161E_Shell_RNS_13.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

14^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 14^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1412181653-BBFF_Shell_RNS_14.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

17^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 17^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1712181718-03EF_Shell_RNS_17.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

18^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 18^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1812181734-2D97_Shell_RNS_18.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

19^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 19^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

http://content.prnewswire.com/documents/PRNUK-1912181712-7C58_Shell_RNS_19.12.2018_CC.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

ROYAL DUTCH SHELL PLC - Transaction in Own Shares

Transaction in Own Shares

20^th December, 2018

Royal Dutch Shell plc (the ‘Company’) announces that on 20^th December 2018 it purchased the following number of “A” Shares for cancellation.

Aggregated information on “A” shares purchased according to trading venues:

These share purchases form part of the second tranche of the Company´s existing share buy-back programme previously announced on July 26, 2018. The Company announced the second tranche of its share buyback programme on November 1, 2018.

In respect of this programme, Morgan Stanley & Co. International plc will make trading decisions in relation to the Company’s securities independently of the Company for a period from November 1, 2018 up to and including January 28, 2019.

Any such share purchases will be effected within certain pre-set parameters, and in accordance with the Company´s general authority to repurchase shares, Chapter 12 of the Listing Rules and Article 5 of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes and the Commission Delegated Regulation (EU) 2016/1052.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as a part of the buy-back programme is detailed below.

https://mma.prnewswire.com/media/801319/Shell_RNS_20_12_2018.pdf

Enquiries

Shell Media Relations

International, UK, European Press: +44 (0)207 934 5550

Shell Investor Relations

Europe: + 31 70 377 3996

United States: + 1 832 337 2034

LEI number of Royal Dutch Shell plc: 21380068P1DRHMJ8KU70

Classification: Acquisition or disposal of the issuer’s own shares

This Report on Form 6-K is incorporated by reference into:

a) the Registration Statement on Form F-3 of Royal Dutch Shell plc and Shell International Finance B.V. (Registration Numbers 333-222005 and 333-222005-01); and

b) the Registration Statements on Forms S-8 of Royal Dutch Shell plc (Registration Numbers 333-126715, 333-141397, 333-171206, 333-192821, 333-200953, 333-215273, 333-222813 and 333-228137).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.