Item 5.02 Departure of Directors or Principal Officers; Election of Directors;

Appointment of Principal Officers; Compensatory Arrangements of Certain



On December 9, 2022, John West, co-founder, Chief Executive Officer and member of the board of directors (the "Board") of Personalis, Inc. (the "Company") notified the Company of his decision to retire as Chief Executive Officer and as a director of the Company, effective as of December 31, 2022. The Board will immediately initiate a search to recruit a successor. The Board has appointed Aaron Tachibana, the Company's Chief Financial Officer, to serve as interim Chief Executive Officer and Christopher Hall, the Company's SVP and Head, Diagnostics Business, to serve as President, each effective December 31, 2022. Mr. West will continue to serve as an advisor to the Board.

Any potential changes to Mr. Tachibana's and Hall's compensation in connection with the executive transition have not yet been determined at the time of this filing.

Mr. Tachibana, age 62, has served as the Company's Chief Financial Officer since March 2019; in July 2021, he was promoted Senior Vice President and Chief Financial Officer. From August 2015 to September 2018, Mr. Tachibana served as Chief Financial Officer at Lumentum Holdings Inc., a designer and manufacturer of optical and photonic products. From November 2013 to July 2015, Mr. Tachibana served as Vice President, Finance and Corporate Controller at JDS Uniphase Corp., subsequently renamed Viavi Solutions Inc., a network test, measurement, and assurance technology company. From March 2010 to October 2013, Mr. Tachibana served as Chief Financial Officer at Pericom Semiconductor Corp., a supplier of high-performance connectivity and timing solutions. Mr. Tachibana holds a B.S. in Business Administration and Finance from San Jose State University.

Mr. Hall, age 54, has served as the Company's SVP and Head, Diagnostics Business since October 2022. From October 2020 to July 2022, he served as Chief Executive Officer of Naring Health, Inc., a multi-omics platform and nutrition company. From March 2010 to July 2019, Mr. Hall served as President, Chief Operating Officer, and Chief Commercial Officer at Veracyte, Inc., a publicly-traded genomic diagnostics company. Mr. Hall also previously served as Chief Business Officer for Berkeley HeartLab, Celera Corporation's cardiovascular diagnostic lab. Mr. Hall holds a B.A. in Political Science and Economics from DePauw University and a M.B.A. from Harvard Business School.

On December 14, 2022, the Company and Mr. West entered into a separation agreement (the "Separation Agreement") pursuant to which Mr. West will be entitled to receive, subject to Mr. West's execution and non-revocation of a customary release of claims in favor of the Company, (i) the severance benefits he would have been entitled to receive under his First Amended and Restated Executive Severance Agreement with the Company, dated February 23, 2022, in the case of a termination without cause or a resignation for good reason, and (ii) extended exercisability of his vested stock options until December 31, 2023.

The foregoing is a summary only and does not purport to be a complete description of all of the terms, provisions and agreements contained in the Separation Agreement, and is subject to and qualified in its entirety by reference to the complete text of the Separation Agreement, a copy of which is filed as Exhibit 10.1 to this report.

Item 9.01 Financial Statements and Exhibits.

  (d) Exhibits

Number       Description

10.1           Separation Agreement, dated December 14, 2022, between the Company
             and John West

104          Cover Page Interactive Data File (formatted as Inline XBRL).


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