Investor Presentaiton

OFFICE PROPERTIES INCOME TRUST SECURE AND STABLE CASH FLOW SUPPORTED BY HIGH CREDIT TENANT BASE AND GEOGRAPHICALLY DIVERSE PORTFOLIO Google SONOMA BIOTHERAPEUTICS NORTHROP Top Tenants BANK OF AMERICA OF GE 1976 CDC MICRO FOCUS SONESTA GRUMMAN InsightGlobal SHB servicenow GSA .GOV (Various Agencies) OPI Strategic Markets Top MSAs Washington DC Chicago (1) 21.6% 10.6% Atlanta 9.4% Silicon Valley 6.0% Dallas/Ft. Worth 5.2% Kansas City 4.4% Sacramento 4.1% Boston 3.0% Provo 2.9% Indianapolis 2.6% Charlotte 2.1% Denver ■2.1% Baltimore ■1.9% Northern New Jersey 1.6% Seattle 1.5% Tenant Credit Profile 30% 6% 64% Portfolio Highlights (2) Tenant Industry Property Type 4%3% 5% 7% 8% 20% 11% 11% 12% 15% ■Investment Grade ■ Not Rated ■Non-Investment Grade ■U.S. Government ■Technology & Comms. ■Manuf./Transportation ■ Other Government (1) Includes the District of Columbia, Northern Virginia and Maryland. (2) Represents percentage of total annualized rental income. 16% Lease Type 4% 25% 47% 22% 66% 25% ■Real Estate & Finanical ■Legal/Professional Services ■ Other Gov. Contractors ■ Office ■ Government - Office ■R&D Office ■ Other ■ Industrial ■ Managed Net ■ Full Service ■Modified Gross ☐ Triple Net 5

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