EXAGEN INC. Real Estate Contracts & Agreements

Sublease Agreement, dated August 19, 2021, by and between Plum Healthcare Group, LLC and the Company (Filed With SEC on November 10, 2021)

Second Amendment to Standard Industrial/Commercial Single-Tenant Lease, dated October 11, 2021, by and between Liberty Vista and the Company (Filed With SEC on November 10, 2021)

Fifth Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated October 19, 2021, by and between RGS Properties and the Company (Filed With SEC on November 10, 2021)

First Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated October 19, 2021, by and between RGS Properties and the Company (Filed With SEC on November 10, 2021)

First Amendment to Standard Industrial/Commercial Single-Tenant Lease, dated January 6, 2021, by and between Liberty Vista and the Registrant (Filed With SEC on March 16, 2021)

Second Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated April 29, 2016, by and between RGS Properties and the Registrant (Filed With SEC on March 25, 2020)

Third Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated June 16, 2017, by and between RGS Properties and the Registrant (Filed With SEC on March 25, 2020)

Fourth Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated March 16, 2020, by and between RGS Properties and the Registrant (Filed With SEC on March 25, 2020)

First Amendment to Standard Industrial/Commercial Single-Tenant Lease, dated August 2, 2017, by and between Geiger Court, LLC and the Registrant (Filed With SEC on March 25, 2020)

Extension of Lease to Standard Industrial/Commercial Single-Tenant Lease, dated March 12, 2020, by and between Liberty Vista and the Registrant (Filed With SEC on March 25, 2020)

Standard Industrial/Commercial Multi-Tenant Lease, dated March 17, 2020 by and between RGS Properties and the Registrant (Filed With SEC on March 25, 2020)

Standard Industrial/Commercial Multi-Tenant Lease, dated January 13, 2012, by and between RGS Properties and the Registrant (Filed With SEC on August 23, 2019)

First Amendment to Standard Industrial/Commercial Multi-Tenant Lease, dated December 1, 2013, by and between RGS Properties and the Registrant (Filed With SEC on August 23, 2019)

Lease, dated May 7, 2013, by and between The Regents of the University of New Mexico and the Registrant (Filed With SEC on August 23, 2019)

First Amendment to Lease by and between The Regents of the University of New Mexico and the Registrant (Filed With SEC on August 23, 2019)

Second Amendment to Lease by and between The Regents of the University of New Mexico and the Registrant (Filed With SEC on August 23, 2019)

Third Amendment to Lease by and between The Regents of the University of New Mexico and the Registrant (Filed With SEC on August 23, 2019)

Standard Industrial/Commercial Single-Tenant Lease, dated September 4, 2014, by and between Geiger Court, LLC and the Registrant (Filed With SEC on August 23, 2019)

Master Lease Agreement, dated February 1, 2018, by and between Celtic Commercial Finance, a division of MB Equipment Finance, LLC and the Registrant (Filed With SEC on August 23, 2019)

LEASE (Filed With SEC on February 17, 2016)

THIRD AMENDMENT TO LEASE (Filed With SEC on August 12, 2015)

SECOND AMENDMENT TO LEASE (Filed With SEC on February 18, 2015)

LEASE OF REAL PROPERTY Between The Regents of the University of New Mexico, Landlord And Exagen Diagnostics, Inc,Tenant Date: May 7, 2013 LEASE (Filed With SEC on September 19, 2014)

FIRST AMENDMENT TO LEASE (Filed With SEC on September 19, 2014)

AIR COMMERCIAL REAL ESTATE ASSOCIATION STANDARD INDUSTRIAL/COMMERCIAL SINGLE-TENANT LEASE NET (DO NOT USE THIS FORM FOR MULTI-TENANT BUILDINGS) (Filed With SEC on September 19, 2014)