CORPORATE OFFICE PROPERTIES TRUST
CIK 860546 · View on SEC EDGAR ↗
First SEC filing: Sept. 30, 2010 · Latest: Sept. 30, 2010
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COPT Defense Properties is a real estate investment trust that invests in office buildings, mostly in the suburbs of the Washington, D.C. metropolitan area. It primarily leases to the U.S. government or companies in the arms industry. As of December 31, 2024, the company owned 164 office buildings comprising 16.5 million square feet and 31 single-tenant data centers comprising 5.9 million square feet.
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COPT Defense Properties is a real estate investment trust that invests in office buildings, mostly in the suburbs of the Washington, D.C. metropolitan area. It primarily leases to the U.S. government or companies in the arms industry. As of December 31, 2024, the company owned 164 office buildings comprising 16.5 million square feet and 31 single-tenant data centers comprising 5.9 million square feet.
History
The company was founded in 1988 by Clay W. Hamlin III as Royale Investments, Inc. In 1991, the company became a public company via an initial public offering. In 1997, the company merged with Shidler Group, founded by Jay H. Shidler, and changed its name to Corporate Office Properties Trust. In 1998, the company acquired 16 buildings from Constellation Energy in exchange for a 41.5% stake in the company. Constellation sold its stake in the company in 2002. In 2005, Randall M. Griffin became chief executive officer of the company. In September 2023, the Company changed its name from Corporate Office Properties Trust to COPT Defense Properties.
Tenants
The company's largest tenants are as follows:
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Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 7, 2011 | CDP | S 10b5-1 | 21,000 | $11.92 | $250,320 | 2,568,184 Indirect | -0.81% | Disposed | 212.5% (price as of 2026-08-21) |
| June 6, 2011 | CDP | S 10b5-1 | 11,400 | $11.92 | $135,888 | 2,589,184 Indirect | -0.44% | Disposed | 212.5% (price as of 2026-08-21) |
| June 3, 2011 | CDP | S 10b5-1 | 65,000 | $11.77 | $765,050 | 2,600,584 Indirect | -2.44% | Disposed | 216.5% (price as of 2026-08-21) |
| May 31, 2011 | CDP | S 10b5-1 | 37,600 | $11.25 | $423,000 | 2,665,584 Indirect | -1.39% | Disposed | 231.1% (price as of 2026-08-21) |
| May 27, 2011 | CDP | S 10b5-1 | 9,000 | $11.07 | $99,630 | 2,703,184 Indirect | -0.33% | Disposed | 236.5% (price as of 2026-08-21) |
| May 26, 2011 | CDP | S 10b5-1 | 16,000 | $11.06 | $176,960 | 2,712,184 Indirect | -0.59% | Disposed | 236.8% (price as of 2026-08-21) |
| May 17, 2011 | CDP | S 10b5-1 | 40,000 | $11.18 | $447,200 | 2,728,184 Indirect | -1.44% | Disposed | 233.2% (price as of 2026-08-21) |
| May 13, 2011 | CDP | S 10b5-1 | 11,000 | $11.10 | $122,100 | 2,768,184 Indirect | -0.40% | Disposed | 235.6% (price as of 2026-08-21) |
| May 12, 2011 | CDP | S 10b5-1 | 10,000 | $11.04 | $110,400 | 2,779,184 Indirect | -0.36% | Disposed | 237.4% (price as of 2026-08-21) |
| May 12, 2011 | CDP | S 10b5-1 | 10,000 | $11.04 | $110,400 | 2,779,184 Indirect | +0.36% | Acquired | 237.4% (price as of 2026-08-21) |
| May 11, 2011 | CDP | S 10b5-1 | 19,000 | $11.12 | $211,280 | 2,789,184 Indirect | -0.68% | Disposed | 235.0% (price as of 2026-08-21) |
| May 11, 2011 | CDP | S 10b5-1 | 19,000 | $11.12 | $211,280 | 2,789,184 Indirect | -0.68% | Disposed | 235.0% (price as of 2026-08-21) |
| May 6, 2011 | CDP | S 10b5-1 | 40,000 | $11.19 | $447,600 | 2,808,184 Indirect | -1.40% | Disposed | 232.9% (price as of 2026-08-21) |
| May 3, 2011 | CDP | S 10b5-1 | 32,000 | $11.35 | $363,200 | 2,848,184 Indirect | -1.11% | Disposed | 228.2% (price as of 2026-08-21) |
| May 2, 2011 | CDP | S 10b5-1 | 28,000 | $11.32 | $316,960 | 2,880,184 Indirect | -0.96% | Disposed | 229.1% (price as of 2026-08-21) |
| April 27, 2011 | CDP | S 10b5-1 | 35,000 | $11.25 | $393,750 | 2,908,184 Indirect | -1.19% | Disposed | 231.1% (price as of 2026-08-21) |
| April 11, 2011 | CDP | S 10b5-1 | 86,900 | $12.22 | $1,061,918 | 2,943,184 Indirect | -2.87% | Disposed | 204.8% (price as of 2026-08-21) |
| April 8, 2011 | CDP | S 10b5-1 | 38,100 | $12.25 | $466,725 | 3,030,084 Indirect | -1.24% | Disposed | 204.1% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.