Peakstone Realty Trust (PKST) 10-Q 2023 Q3 Quarterly report

1520 E. Grand Ave, El Segundo, CA 90245 | 310.606.3200 | pkst.com September 6, 2023 Via Personal Delivery and E-Mail Griffin Capital Company, LLC Griffin Capital, LLC Griffin Capital Plaza 266 Kansas Street El Segundo, CA 90245 Attention: Kevin A. Shields E-Mail: shields@griffincapital.com Re: Termination Notice for that certain Administrative Services Agreement dated December 14, 2018 (as amended, the “Agreement”), by and between Griffin Capital Company, LLC and Griffin Capital, LLC (collectively, the “Griffin Entities”), on the one hand, and Peakstone Realty Trust, PKST OP, L.P., Griffin Capital Essential Asset TRS, Inc. and Griffin Capital Real Estate Company, LLC (collectively, the “Company”), on the other hand. Dear Kevin: Reference is made to the Agreement. The Company hereby elects to terminate the “HR Support” Services as set forth on Schedule A to the Agreement effective October 6, 2023. This letter shall constitute the Company’s notice to the Griffin Entities of such termination pursuant to the Agreement, and more specifically Section (iii) of that certain letter agreement dated March 21, 2023, by and between the Griffin Entities and the Company. The Company has now terminated all Services under the Agreement. Accordingly, pursuant to Section 9.2(b) of the Agreement, the Agreement shall automatically terminate effective October 6, 2023. Sincerely, PEAKSTONE REALTY TRUST By: Name: Javier F. Bitar Its: Chief Financial Officer and Treasurer GRIFFIN CAPITAL ESSENTIAL ASSET TRS, INC. By: Name: Javier F. Bitar Title: Chief Financial Officer and Treasurer PKST OP, L.P. By: Peakstone Realty Trust, as General Partner of PKST OP, L.P. By: Name: Javier F. Bitar Title: Chief Financial Officer and Treasurer GRIFFIN CAPITAL REAL ESTATE COMPANY, LLC By: Name: Javier F. Bitar Title: Chief Financial Officer and Treasurer