Real Estate Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2025

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Information Related to Investments in Consolidated Real Estate Joint Ventures

The table below sets forth information pertaining to our investments in consolidated real estate joint ventures, which are each variable interest entities (dollars in thousands):


		Nominal Ownership %		December 31, 2025
	Date Formed			Total Assets		Encumbered Assets		Total Liabilities		Mortgage Debt
Entity			Location
LW Redstone Company, LLC (1)	3/23/2010	85%	Huntsville, AL	$	758,799	$	33,119	$	61,581	$	—
Stevens Investors, LLC	8/11/2015	95%	Washington, DC	141,077		—		2,444		—
M Square Associates, LLC	6/26/2007	50%	College Park, MD	103,856		54,348		48,592		46,189
				$	1,003,732	$	87,467	$	112,617	$	46,189

(1)As discussed below, we fund all capital requirements. Our partner receives distributions of $1.2 million of annual operating cash flows, plus certain fees for leasing and development, and we receive the remainder.

Schedule of Information Related to Investments in Unconsolidated Real Estate Joint Ventures

The table below sets forth information pertaining to our investments in unconsolidated real estate joint ventures accounted for using the equity method of accounting (dollars in thousands):


	Date Formed	Nominal Ownership %	Number of Properties	Carrying Value of Investment as of December 31 (1),
Entity				2025		2024
Redshift (2)	1/10/2023	10%	3	$	20,767	$	20,921
BREIT COPT DC JV LLC	6/20/2019	10%	9	8,941		9,584
Quark JV LLC	12/14/2022	10%	2	6,660		6,706
B RE COPT DC JV III LLC	6/2/2021	10%	2	(600)		2,149
B RE COPT DC JV II LLC (3)	10/30/2020	10%	8	(22,243)		(3,409)
			24	$	13,525	$	35,951

(1)Included $36.4 million and $39.4 million reported in “investment in unconsolidated real estate joint ventures” and $22.8 million and $3.4 million for investments with deficit balances reported in “other liabilities” on our consolidated balance sheets as of December 31, 2025 and 2024, respectively. Investments with deficit balances are attributable to JV distributions of nonrecourse debt refinancing proceeds in excess of our equity in B RE COPT DC JV III LLC and B RE COPT DC JV II LLC; we are obligated to fund our share of future cash flow requirements of these joint ventures.

(2)Formed in connection with the transaction described further in Note 4.

(3)Our investment in B RE COPT DC JV II LLC was lower than our share of the joint venture’s equity by $6.5 million as of December 31, 2025 and $6.7 million as of December 31, 2024 due to a difference between our cost basis and our share of the joint venture’s underlying equity in its net assets. We recognize adjustments to our share of the joint venture’s earnings and losses resulting from this basis difference in the underlying assets of the joint venture.