COPT Defense Properties: A History of Growth and Evolution
The trajectory of COPT Defense Properties is a story of strategic mergers, public expansion, and rebranding. From its humble beginnings in the late 1980s to its current identity, the company has navigated the complexities of the commercial real estate market through calculated acquisitions and leadership changes.
The Formative Years
The organization was established in 1988 by Clay W. Hamlin III, originally operating under the name Royale Investments, Inc. The company took a significant step toward growth in 1991 when it transitioned into a public company through an initial public offering (IPO), a process where a private corporation offers shares to the public for the first time to raise capital.

Strategic Mergers and Expansion
The late 1990s marked a period of rapid transformation. In 1997, the company merged with the Shidler Group, an entity founded by Jay H. Shidler. Following this merger, the organization rebranded as Corporate Office Properties Trust.
Expansion continued in 1998 through a unique asset exchange. The company acquired 16 buildings from Constellation Energy. In return for these properties, Constellation Energy received a 41.5% stake in the company. This partnership lasted several years until Constellation Energy sold its remaining interest in 2002.
Modern Leadership and Rebranding
The company entered a new era of management in 2005 when Randall M. Griffin assumed the role of chief executive officer. Under his leadership, the company continued to refine its market position.
In a definitive move to align its identity with its current strategic focus, the company officially changed its name from Corporate Office Properties Trust to COPT Defense Properties in September 2023.
Key Facts
- Founded: 1988 as Royale Investments, Inc.
- Public Listing: Went public via IPO in 1991.
- Major Merger: Joined with Shidler Group in 1997.
- Asset Growth: Acquired 16 buildings from Constellation Energy in 1998.
- Current Name: COPT Defense Properties (adopted September 2023).
Company Evolution Summary
| Year | Event | Key Figure/Entity |
|---|---|---|
| 1988 | Company Founded | Clay W. Hamlin III |
| 1991 | Initial Public Offering | Public Shareholders |
| 1997 | Merger and Name Change | Shidler Group / Jay H. Shidler |
| 1998 | Acquisition of 16 Buildings | Constellation Energy |
| 2005 | CEO Appointment | Randall M. Griffin |
| 2023 | Rebranded to COPT Defense Properties | Corporate Board |
Frequently Asked Questions
Who founded the company?
The company was founded in 1988 by Clay W. Hamlin III, originally under the name Royale Investments, Inc.
When did the company go public?
The company became a public entity in 1991 through an initial public offering.
What was the nature of the deal with Constellation Energy?
In 1998, the company acquired 16 buildings from Constellation Energy in exchange for a 41.5% stake in the company, which Constellation later sold in 2002.
Who is the current CEO?
Randall M. Griffin has served as the chief executive officer since 2005.
When did the company change its name to COPT Defense Properties?
The name change from Corporate Office Properties Trust to COPT Defense Properties occurred in September 2023.