As of December 31, 2022, the Company held ownership interests in twelve unconsolidated real estate ventures for a net aggregate investment balance of $532.2 million, which includes a negative investment balance in one unconsolidated real estate venture of $35.4 million, reflected within “Other liabilities” on the consolidated balance sheets. As of December 31, 2022, five of the real estate ventures owned properties that contained an aggregate of approximately 9.1 million net rentable square feet of office space; two real estate ventures owned 1.4 acres of land held for development; four real estate venture owned 7.5 acres of land in active development; and one real estate venture owned a mixed used tower comprised of 250 apartment units and 0.2 million net rentable square feet of office/retail space.

The amounts reflected in the following tables (except for the Company’s share of equity in income) are based on the financial information of the individual unconsolidated real estate ventures. The Company records operating losses of a real estate venture in excess of its investment balance if the Company is liable for the obligations of the real estate venture or is otherwise committed to provide financial support to the real estate venture.


	Ownership Percentage	Carrying Amount				Company's Share of unconsolidated real estate venture Income (Loss)						Unconsolidated Real Estate Venture Debt at 100%, gross
		2022		2021		2022		2021		2020		2022		2021
Office Properties
Commerce Square Venture	70% (a)	$	238,105	$	247,798	$	(12,128)	$	(15,501)	$	(9,150)	$	206,737	$	213,069
Mid-Atlantic Office Venture	40% (a)	31,005		31,680		412		932		96		128,904		123,015
Brandywine - AI Venture LLC	50%	—		—		—		(721)		185		—		—
Herndon Innovation Center Metro Portfolio Venture, LLC	15%	15,304		15,844		(536)		(174)		(358)		207,302		207,302
MAP Venture (b)	50%	(35,411)		(24,396)		(8,340)		(8,683)		(6,570)		182,053		184,263
Cira Square	20%	27,815		—		(985)		—		—		257,700		—


Other
4040 Wilson Venture (c)	50%	29,633		31,059		(1,211)		(2,258)		(2,162)		145,070		145,000
1919 Venture (d)	50%	—		13,791		1,392		427		59		—		88,860
Development Properties
3025 JFK Venture (c)	55%	57,630		56,370		(35)		(118)		—		60,118		—
JBG - 51 N Street (c)	70%	21,208		21,213		(382)		(402)		(457)		—		—
JBG - 1250 First Street Office (c)	70%	17,759		17,751		(195)		(199)		(227)		—		—
3151 Market Street Venture (c)	55%	63,751		—		(8)		—		—		—		—
One Uptown - Office (c)	50%	34,980		—		—		—		—		16,895		—
One Uptown - Multifamily (c)	50%	30,445		—		—		—		—		—		—

		$	532,224	$	411,110	$	(22,016)	$	(26,697)	$	(18,584)	$	1,204,779	$	961,509

(a)This amount does not include the effect of the basis difference between the Company's historical cost basis and the basis recorded at the real estate venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from the impairment of investments, purchases of third party interests in existing real estate ventures and upon the transfer of assets that were previously owned by the Company into a real estate venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the real estate venture level.


	Year Ended December 31,
	2022		2021		2020
Revenue	$	244,981	$	214,792	$	150,276
Operating expenses	(124,608)		(117,273)		(85,812)
Interest expense, net	(49,007)		(30,569)		(22,661)
Depreciation and amortization	(103,378)		(97,147)		(70,805)
Provision for impairment	—		(1,393)		—


Net loss	$	(32,012)	$	(31,590)	$	(29,002)
Ownership interest %	Various		Various		Various
Company's share of net loss	$	(21,594)	$	(25,972)	$	(18,540)

Basis adjustments and other	(422)		(725)		(44)
Equity in loss of unconsolidated real estate ventures	$	(22,016)	$	(26,697)	$	(18,584)

On December 1, 2021, the Company established the One Uptown Ventures with affiliates of Canyon Partners Real Estate to commence development of One Uptown, a $335.6 million mixed-use project in Austin, Texas. One Uptown has been designed to deliver 348,000 square feet of Class-A workspace and 15,000 square feet of street-level retail space (through the “office” joint venture) and 341 apartment residences and a public park (through the “multifamily” joint venture) and a six-

story parking garage to be shared by the two joint ventures. The Company's partner in each of the two joint ventures has agreed, subject to customary funding conditions, including closing of the applicable construction loan, to fund approximately $64.5 million of the combined project costs in exchange for a 50% preferred equity interest in each of the two joint ventures, with the Company retaining a 50% common equity interest in each. Under the terms of each of the joint venture agreements, the joint venture partner had no obligation to fund any portion of the applicable project costs until the closing of the applicable construction loan. The absence of this obligation prevented Company from meeting the sale recognition criteria of ASC 606 until the applicable closings of the construction loans. On July 29, 2022, the One Uptown Ventures closed on two separate construction loans. The office joint venture closed on a $121.7 million construction loan which bears interest at Secured Overnight Offering Rate (“SOFR”) plus 3.00% and the multifamily joint venture closed on an $85.0 million construction loan which bears interest at SOFR plus 2.45%, plus, in each case, a daily SOFR adjustment of 10 basis points. Both loans mature in July 2026. The Company has also provided a carry guarantee and limited payment guarantee up to 30% and 15% of the principal balance of the $121.7 million and $85 million construction loan, respectively. The Company subsequently recognized the formation of the joint ventures and deconsolidated the projects upon the closing of the loans.

The Company has determined that the each of the One Uptown Ventures is a VIE. As a result, the Company used the VIE model under the accounting standard for consolidation in order to determine whether to consolidate the One Uptown Ventures. Based upon each member's shared power over the activities of the One Uptown Ventures under the operating and related agreements, and the Company's lack of control over the development and construction phases of the project, the One Uptown Ventures are accounted for under the equity method of accounting.

On July 14, 2022, the Company formed a joint venture, with an unaffiliated third party, to develop a life science/office building containing approximately 417,000 rentable square feet under a long-term ground lease located at 3151 Market Street in Philadelphia, Pennsylvania. The estimated project cost is approximately $308 million, and the joint venture partner has agreed, subject to customary funding conditions, to fund up to approximately $55 million of the project costs in exchange for a 45% preferred equity interest in the venture.

The Company has determined that the 3151 Market Street Venture is VIE. As a result, the Company used the VIE model under the accounting standard for consolidation in order to determine whether to consolidate the 3151 Market Street Venture. Based upon each member's shared power over the activities of the 3151 Market Street Venture under the operating and related agreements, and the Company's lack of control over the development and construction phases of the project, 3151 Market Street Venture is accounted for under the equity method of accounting.

On March 17, 2022, the Company formed a joint venture, Cira Square REIT, LLC (“Cira Square Venture”), for the purpose of acquiring Cira Square, an office property located at 2970 Market Street in Philadelphia, Pennsylvania containing 862,692 rentable square feet for a gross purchase price of $383.0 million. The Company owns a 20% common equity interest in Cira Square Venture and provided an initial capital contribution of $28.6 million on the closing date.

Based on the facts and circumstances at the formation of Cira Square Venture, the Company determined that the venture is not a VIE in accordance with the accounting standard for the consolidation of VIEs. As a result, the Company used the voting interest model under the accounting standard for consolidation in order to determine whether to consolidate Cira Square Venture. Based upon each member's substantive participating rights over the activities of Cira Square Venture under the operating and related agreements, it is not consolidated by the Company, and is accounted for under the equity method of accounting.

The 4040 Wilson LLC Venture (“4040 Wilson”) consists of one property containing an aggregate of 225,000 square feet of office/retail and 250 apartment units, located in the Metropolitan Washington, D.C. segment. The Company and its partner each own a 50% interest in 4040 Wilson. The residential component and office/retail portion of 4040 Wilson were

substantially complete and placed into service during the first quarter of 2020 and the first quarter of 2021, respectively. During the fourth quarter of 2021, 4040 Wilson refinanced the $150.0 million secured construction loan into a $155.0 million mortgage loan secured by the property. The interest rate on this loan is 1.8% over term SOFR and matures in December 2026. Effective January 3, 2023, this debt is swapped to a fixed rate of 5.70% through the maturity of the loan.

During the year ended December 31, 2021, Brandywine - AI Venture, recorded a $1.4 million held for sale impairment charge related to 3141 Fairview Park Drive. The Company’s share of the impairment charge was $0.7 million, which is reflected in “Equity in loss of Real Estate Ventures” in the consolidated statements of operations for the year ended December 31, 2021. The impairment was measured based on an executed sale agreement with a third-party. The Company determined that its investment in the real estate venture is not impaired as the Company's share of the distributable cash is in excess of the Company's basis in the real estate venture. On November 9, 2021, BDN AI Venture sold 3141 Fairview Park Drive, the last remaining office property, totaling 183,618 rentable square feet in Falls Church, Virginia, at an aggregate sales price of $27.6 million. The Company received cash proceeds of $12.6 million after closing costs. The Company recorded an $3.0 million gain within the caption “Net gain on real estate venture transactions” within its consolidated statements of operations for the year ended December 31, 2021 upon liquidation of the venture.

During 2019, BDN - AI Venture recorded a $5.6 million held for use impairment charge related to 3141 Fairview Park Drive. The Company’s share of the impairment charge was $2.8 million which is reflected in “Equity in loss of unconsolidated real estate ventures” in the consolidated statements of operations for the year ended December 31, 2019. The impairment was measured based on an appraisal of the property performed by a third party. The Company determined that its investment in the real estate venture was not impaired as the Company's share of the distributable cash was in excess of the Company's basis in the real estate venture.

During 2019, BDN - AI Venture transferred an office building located in Falls Church, Virginia containing 180,659 rentable square feet to the mortgage lender in full satisfaction of the lender’s outstanding $26.0 million mortgage loan. The mortgage loan was nonrecourse to the Company. The Company recognized its $2.2 million share of the gain on debt forgiveness in “Net gain on real estate venture transactions” in the consolidated statements of operations for the year ended December 31, 2019.

On February 2, 2021, the Company contributed its investment in a 99-year prepaid leasehold interest in a one-acre land parcel held for development at 3025 JFK Boulevard in Philadelphia, Pennsylvania to the 3025 JFK Venture. The Company's initial investment in this real estate venture at February 2, 2021 was $34.8 million. The real estate venture was formed to develop a 570,000 square foot mixed-use building at property under the long-term ground lease. The estimated project cost is approximately $287.3 million, and the joint venture partner agreed, subject to customary funding conditions, to fund up to approximately $45.2 million of the project costs in exchange for a 45% preferred equity interest in the venture and the Company will retain a 55% preferred equity interest.

On July 23, 2021, the 3025 JFK Venture closed on a $186.7 million construction loan, which bears interest at 3.50% plus LIBOR (subject to a LIBOR floor of 0.25%) per annum and matures in July 2025. In addition to its $34.8 million credit for contribution of the leasehold interest at 3025 JFK Venture, the Company has funded $20.5 million of project costs as of December 31, 2022. The remaining project costs will be funded by the joint venture partner and the construction loan.

The Company has determined that the 3025 JFK Venture is a VIE. As a result, the Company used the VIE model under the accounting standard for consolidation in order to determine whether to consolidate the 3025 JFK Venture. Based upon each member’s shared power over the activities of 3025 JFK Venture under the operating and related agreements, and the Company’s lack of control over the development and construction phases of the project, 3025 JFK Venture is accounted for under the equity method of accounting.

On December 21, 2020, the Company contributed a portfolio of twelve properties containing an aggregate of 1,128,645 square feet, nine of which are located in the Pennsylvania suburbs segment and three located in the Metropolitan Washington, D.C segment, to the Mid-Atlantic Office JV, for a gross sales price of $192.9 million. After the transaction, the Company owns approximately 25% of the equity interest in the Mid-Atlantic Office JV through a $20.0 million preferred equity holding and approximately 15% of the equity interest through a common equity interest (representing 20% of the total

common equity), for a combined approximately 40% equity interest in the venture. On the closing date, Mid-Atlantic Office JV also obtained $147.4 million of third-party debt financing secured by the twelve properties within the venture, with an initial advance of $120.8 million. The remaining funds available under the loan are $18.5 million. The loan bears interest at LIBOR + 3.15% capped at a total maximum interest rate of 5.7% and matures on January 9, 2024.

On July 21, 2020, the Company sold a 30% preferred equity interest in the entities that own One Commerce Square and Two Commerce Square, two office properties containing 1,896,142 square feet in Philadelphia, Pennsylvania. After the transaction, the Company owns approximately 32% of the equity interest in Commerce Square Venture through preferred equity interest holdings and approximately 38% of the equity interest in Commerce Square Venture as the sole common equity holder, for a combined approximately 70% equity interest in the venture. The properties held by the venture remain encumbered by the existing mortgages.

The Herndon Innovation Center Metro Portfolio Venture, LLC (“Herndon Innovation Center”) consists of eight properties containing an aggregate of 1,293,197 square feet, located in the Metropolitan Washington, D.C. segment. The Company and its partner own 15% and 85% interests in the Herndon Innovation Center, respectively.

The MAP Venture owns 58 office properties that contain an aggregate of 3,924,783 square feet located in the Pennsylvania Suburbs, New Jersey/Delaware, Metropolitan Washington, D.C. and Richmond, Virginia (“MAP Venture”). The MAP Venture leases the land parcels under the 58 office properties through a ground lease that extends through February 2115. Annual payments by the MAP Venture, as tenant under the ground lease, initially total $11.9 million and increase 2.5% annually through November 2025. Thereafter, annual rental payments increase by 2.5% or CPI at the discretion of the lessor.

On November 30, 2022, the Company sold its 50% ownership interest in the 1919 Venture for a gross sales price of $83.2 million, a portion of which satisfied in full the $44.4 million outstanding loan between the Company and the venture. The Company recorded a gain on sale of $26.7 million with the caption “Net gain on real estate venture transactions” within its consolidated statement of operations for the year ended December 31, 2022.

JBG Ventures consists of 51 N 50 Patterson, Holdings, LLC Venture (“51 N Street”) and 1250 First Street Office, LLC Venture (“1250 First Street”), with the Company owning a 70.0% equity interest and JBG/DC Manager, LLC (“JBG”) owning a 30.0% equity interest in each of the two ventures. 51 N Street owns 0.9 acres of undeveloped land and 1250 First Street, owns 0.5 acres of undeveloped land.