Exhibit 10.1

EXTENSION AGREEMENT

Bank of America, N.A.,

as Administrative Agent

under the Five-Year Credit Agreement referred to below

Ladies and Gentlemen:

The undersigned hereby agrees to extend, effective October 9, 2017, the Commitment Termination Date under the Five-Year Credit Agreement dated as of October 9, 2015 (as amended from time to time, the “Five-Year Credit Agreement”) among, inter alios, Lockheed Martin Corporation, the Lenders party thereto and Bank of America, N.A., as Administrative Agent, for one year to October 9, 2022. Terms defined in the Five-Year Credit Agreement are used herein with the same meaning.

This Extension Agreement shall be construed in accordance with and governed by the laws of the State of New York.

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AUSTRALIA AND NEW ZEALAND BANKING GROUP LIMITED

By: /s/ Robert Grillo

Name: Robert Grillo

Title: Director

BANK OF AMERICA, N.A.

By: /s/ Prathamesh Kshirsagar

Name: Prathamesh Kshirsagar

Title: Vice President

THE BANK OF TOKYO-MITSUBISHI UFJ, LTD

By: /s/ Maria Iarriccio

Name: Maria Iarriccio

Title: Director

BARCLAYS BANK PLC

By: /s/ Craig Malloy

Name: Craig Malloy

Title: Director

CITIBANK, N.A.

By: /s/ Michael Vondriska

Name: Michael Vondriska

Title: Vice President

[Lockheed – Extension Agreement]

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK

By: /s/ Mark Koneval

Name: Mark Koneval

Title: Managing Director

By: /s/ Gary Herzog

Name: Gary Herzog

Title: Managing Director

CREDIT INDUSTRIEL ET COMMERCIAL

By: /s/ Nicolas Regent

Name: Nicolas Regent

Title: VP, Corporate Banking

By: /s/ Clifford Abramsky

Name: Clifford Abramsky

Title: MD, Corporate Finance

GOLDMAN SACHS BANK USA

By: /s/ Ryan Durkin

Name: Ryan Durkin

Title: Authorized Signatory

JPMORGAN CHASE BANK, N.A.

By: /s/ Robert P. Kellas

Name: Robert P. Kellas

Title: Executive Director

LLOYDS BANK PLC

By: /s/ Daven Popat

Name: Daven Popat

Title: Senior Vice President Transaction Execution Category A P003

By: /s/ Erin Walsh

Name: Erin Walsh

Title: Assistant Vice President W004

[Lockheed – Extension Agreement]

MIZUHO BANK, LTD.

By: /s/ Donna DeMagistris

Name: Donna DeMagistris

Title: Authorized Signatory

MORGAN STANLEY BANK, N.A.

By: /s/ Michael King

Name: Michael King

Title: Authorized Signatory

THE NORTHERN TRUST COMPANY

By: /s/ Peter J. Hallan

Name: Peter J. Hallan

Title: Vice President

RIYAD BANK, HOUSTON AGENCY

By: /s/ Tim Hartnett

Name: Tim Hartnett

Title: Vice President & Administrative Officer

By: /s/ Manny Cafeo

Name: Manny Cafeo

Title: Operations Manager

ROYAL BANK OF CANADA

By: /s/ Richard C. Smith

Name: Richard C. Smith

Title: Managing Director

STATE STREET BANK AND TRUST COMPANY

By: /s/ Kimberly R. Costa

Name: Kimberly R. Costa

Title: Vice President

[Lockheed – Extension Agreement]

SUMITOMO MITSUI BANKING CORPORATION

By: /s/ James D. Weinstein

Name: James D. Weinstein

Title: Managing Director

TORONTO DOMINION (NEW YORK) LLC

By: /s/ Pradeep Mehra

Name: Pradeep Mehra

Title: Managing Director

U.S. BANK NATIONAL ASSOCIATION

By: /s/ Jonathan F. Lindvall

Name: Jonathan F. Lindvall

Title: Senior Vice President

UNICREDIT BANK AG, NEW YORK BRANCH

By: /s/ Filippo Pappalardo

Name: Filippo Pappalardo

Title: Managing Director

By: /s/ Peter Daugavietis

Name: Peter Daugavietis

Title: Associate Director

WELLS FARGO BANK, N.A.

By: /s/ Adam Spreyer

Name: Adam Spreyer

Title: Director

[Lockheed – Extension Agreement]

Agreed and accepted:

LOCKHEED MARTIN CORPORATION

By: /s/ John W. Mollard

Name: John W. Mollard

Title: Vice President and Treasurer

BANK OF AMERICA, N.A., as

Administrative Agent

By: /s/ Kyle D. Harding

Name: Kyle D. Harding

Title: Assistant Vice President

[Lockheed – Extension Agreement]