Extension of Employment Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of February 28, 2019

Reference is made to that certain Employment Agreement between you, Kilroy Realty Corporation, a Maryland corporation, and Kilroy Realty, L.P., a Delaware limited partnership, amended and restated effective as of December 31, 2015 (the “Employment Agreement”). This letter is to confirm our agreement that the term of the Employment Agreement (as provided in Section 2 of the Employment Agreement) will be extended by one year so that the Term (as defined in the Employment Agreement) will end on March 1, 2020 (subject to earlier termination as provided in Sections 6 and 7 of the Employment Agreement, and subject to any further extension that may mutually be agreed to in writing). Furthermore, Section 2 of the Employment Agreement is amended by replacing “March 1, 2019” therein with “March 1, 2020 (or a later date as may mutually be agreed to in writing)”.

Except as expressly set forth herein, the Employment Agreement shall remain in full force and effect in accordance with its current terms. This letter may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.