OPI is a REIT focused on owning, operating and leasing properties primarily leased to single tenants and those with high credit quality characteristics such as government entities.

Boston Properties (NYSE:BXP) is the largest publicly-held developer and owner of Class A office properties in the United States, concentrated in five markets - Boston, Los Angeles, New York, San Francisco and Washington, DC.

SL Green Realty Corp., an S&P 500 company and Manhattan's largest office landlord, is a fully integrated real estate investment trust, or REIT, that is focused primarily on acquiring, managing and maximizing value of Manhattan commercial properties.

Alexandria Real Estate Equities, Inc. (NYSE:ARE), an S&P 500® urban office real estate investment trust (REIT), is the first, longest-tenured, and pioneering owner, operator, and developer uniquely focused on collaborative life science, technology, and agtech campuses in AAA innovation cluster locations, with a total market capitalization of $31.9 billion as of December 31, 2020, and an asset base in North America of 49.7 million square feet (SF).

Cousins Properties is a fully integrated, self-administered and self-managed real estate investment trust (REIT). The Company, based in Atlanta, GA and acting through its operating partnership, Cousins Properties LP, primarily invests in Class A office towers located in high-growth Sun Belt markets.

Highwoods Properties, Inc., headquartered in Raleigh, is a publicly-traded (NYSE:HIW) real estate investment trust (REIT) and a member of the S&P MidCap 400 Index.

Douglas Emmett, Inc. (DEI) is a fully integrated, self-administered and self-managed real estate investment trust (REIT), and one of the largest owners and operators of high-quality office and multifamily properties located in the premier coastal submarkets of Los Angeles and Honolulu.

Equity Commonwealth (NYSE: EQC) is a Chicago based, internally managed and self-advised real estate investment trust (REIT) with commercial office properties in the United States.

Kilroy Realty Corporation (NYSE: KRC, the company, KRC) is a leading West Coast landlord and developer, with a major presence in San Diego, Greater Los Angeles, the San Francisco Bay Area, and the Pacific Northwest.

Creative Media & Community Trust Corporation is a real estate investment trust that primarily acquires, owns, and operates Class A and creative office assets in vibrant and improving metropolitan communities throughout the United States (including improving and developing such assets).

Piedmont Office Realty Trust, Inc. (NYSE: PDM) is an owner, manager, developer, redeveloper, and operator of high-quality, Class A office properties located primarily in select sub-markets within seven major Eastern U.S. office markets, with the majority of its revenue being generated from the Sunbelt.

Hudson Pacific is a real estate investment trust with a portfolio of office and studio properties totaling nearly 19 million square feet, including land for development.

Brandywine Realty Trust (NYSE: BDN) is one of the largest, publicly traded, full-service, integrated real estate companies in the United States with a core focus in the Philadelphia, Austin and Washington, D.C. markets.