Form 8-K

8-K — BRANDYWINE REALTY TRUST

Accession: 0000790816-26-000038

Filed: 2026-10-06

Period: 2026-09-30

CIK: 0000790816

SIC: 6798 (REAL ESTATE INVESTMENT TRUSTS)

Item: Completion of Acquisition or Disposition of Assets

Item: Financial Statements and Exhibits

Documents

8-K — bdn-20260930.htm (Primary)

EX-99 — EX-99.1 (ex-991x3151marketdispositi.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: bdn-20260930.htm · Sequence: 1

bdn-20260930

00007908160001060386False00007908162026-09-302026-09-300000790816bdn:BrandywineOperatingPartnershipL.P.Member2026-09-302026-09-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 30, 2026

BRANDYWINE REALTY TRUST

BRANDYWINE OPERATING PARTNERSHIP, L.P.

(Exact name of registrant as specified in charter)

Maryland

(Brandywine Realty Trust)

001-9106

23-2413352

Delaware

(Brandywine Operating Partnership, L.P.)

000-24407

23-2862640

(State or Other Jurisdiction of Incorporation

or Organization)

(Commission file number)

(I.R.S. Employer Identification Number)

2929 Arch Street

Suite 1800

Philadelphia, PA 19104

(Address of principal executive offices) (Zip Code)

(610) 325-5600

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Shares of Beneficial Interest

BDN

NYSE

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Brandywine Realty Trust:

Emerging growth company ☐

Brandywine Operating Partnership, L.P.:

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Brandywine Realty Trust: ☐

Brandywine Operating Partnership, L.P.: ☐

Item 2.01 Completion of Acquisition or Disposition of Assets.

Brandywine Realty Trust (the "Parent Company") is the sole general partner of Brandywine Operating Partnership, L.P. (the "Operating Partnership") and owns its assets and conducts its operations through the Operating Partnership and subsidiaries of the Operating Partnership. The Parent Company, the Operating Partnership and their consolidated subsidiaries are collectively referred to in this report as the "Company." As previously disclosed, on August 31, 2026, the Company entered into an Agreement of Sale to sell its interest in a 441,000 square foot office building, which includes one level of below grade parking containing 70 parking spaces, located at 3151 Market Street in Philadelphia, Pennsylvania (the "Property") to an unrelated third party (the "Buyer"). On September 30, 2026, the Company completed the disposition of the Property to the Buyer for a sales price of $240.0 million and net proceeds of approximately $233.7 million. In connection with the disposition, the Company repaid $60.2 million related to the retirement of the Company’s $57.3 million Commercial Property Assessed Clean Energy Loan, which encumbered the Property.

Item 9.01 Financial Statements and Exhibits

(a) N/A

(b) Pro forma financial information

The pro forma financial information required pursuant to Article 11 of Regulation S-X is attached as Exhibit 99.1 hereto and is incorporated by reference herein.

(d) Exhibits

Exhibit Description

99.1

Unaudited pro forma consolidated financial information for Brandywine Realty Trust for the year ended December 31, 2025 and as of and for the six months ended June 30, 2026

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

BRANDYWINE REALTY TRUST

By: /s/ Thomas E. Wirth

Thomas E. Wirth

Executive Vice President and

Chief Financial Officer

BRANDYWINE OPERATING PARTNERSHIP, L.P.

BY:

BRANDYWINE REALTY TRUST, ITS GENERAL PARTNER

BY:

/s/ Thomas E. Wirth

Thomas E. Wirth

Executive Vice President and

Chief Financial Officer

Date: October 6, 2026

EX-99 — EX-99.1

EX-99

Filename: ex-991x3151marketdispositi.htm · Sequence: 2

Document

Brandywine Realty Trust Unaudited Pro Forma Consolidated Financial Statements

The pro forma consolidated balance sheet for Brandywine Realty Trust (the “Company, “we” or “us”) as of June 30, 2026 has been prepared as if the significant disposition of the property located at 3151 Market Street in Philadelphia, Pennsylvania, during the third quarter of 2026 (noted herein) had occurred as of June 30, 2026. Our pro forma consolidated statements of operations for the six months ended June 30, 2026 and for the year ended December 31, 2025 have been prepared based on our historical financial statements as if the significant disposition during the third quarter of 2026 had occurred on January 1, 2025. Pro forma adjustments are intended to reflect the estimated effect of the disposition of the property described in Note 2. In our opinion, all adjustments necessary to reflect the effects of this disposition have been made.

The pro forma consolidated financial information for the six months ended June 30, 2026 should be read in conjunction with our historical consolidated financial statements and notes thereto in our Quarterly Report on Form 10-Q as of and for the six months ended June 30, 2026. The pro forma consolidated financial information for the year ended December 31, 2025 should be read in conjunction with our historical consolidated financial statements and notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2025. This pro forma information is presented for informational purposes only and does not purport to be indicative of our financial results as if the transaction reflected herein had occurred on the date disclosed above or been in effect during the periods indicated above, nor are they necessarily indicative of our financial position or results of operations of future periods.

- 1 -

BRANDYWINE REALTY TRUST

UNAUDITED PRO FORMA CONSOLIDATED BALANCE SHEET

As of June 30, 2026

(in thousands, except share and per share data)

BDN Historical 3151 Market Street Disposition (Notes) Pro Forma

ASSETS

Real estate investments:

Operating properties $ 3,527,129 $ (234,652) (a) $ 3,292,477

Accumulated depreciation (1,241,465) 3,032

(a)

$ (1,238,433)

Prepaid ground leases, net 34,156 (27,170) (a) $ 6,986

Right of use asset - operating leases, net 12,266 — $ 12,266

Operating real estate investments, net 2,332,086 (258,790) 2,073,296

Construction-in-progress 85,569 (2,026) (a) $ 83,543

Land held for development 75,134 — $ 75,134

Prepaid leasehold interests in land held for development, net 27,762 — $ 27,762

Total real estate investments, net 2,520,551 (260,816) 2,259,735

Cash and cash equivalents 37,870 173,479 (b) $ 211,349

Restricted cash and escrow 830 — $ 830

Accounts receivable 19,916 — $ 19,916

Assets held for sale, net 232,921 — $ 232,921

Accrued rent receivable, net of allowance of $369 as of June 30, 2026 169,267 (16)

(a)

$ 169,251

Investment in unconsolidated real estate ventures 336,851 — $ 336,851

Deferred costs, net 69,222 (568)

(a)

$ 68,654

Intangible assets, net 13,832 (867) (a) $ 12,965

Other assets 134,707 (3,517) (a);(c) $ 131,190

Total assets $ 3,535,967 $ (92,305) $ 3,443,662

LIABILITIES AND BENEFICIARIES' EQUITY

Secured debt, net $ 144,260 $ (56,087) (c) $ 88,173

Unsecured credit facility 149,000 — $ 149,000

Unsecured term loan, net 249,593 — $ 249,593

Unsecured senior notes, net 2,074,153 — $ 2,074,153

Accounts payable and accrued expenses 136,663 — $ 136,663

Distributions payable 14,203 — $ 14,203

Deferred income, gains and rent 21,845 — $ 21,845

Intangible liabilities, net 12,355 (6,304) (a) $ 6,051

Liabilities related to assets held for sale 6,775 — $ 6,775

Lease liability - operating leases 17,031 — $ 17,031

Other liabilities 14,189 — $ 14,189

Total liabilities $ 2,840,067 $ (62,391) $ 2,777,676

Brandywine Realty Trust's Equity:

Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 174,611,856 issued and outstanding as of June 30, 2026 1,740 — 1,740

Additional paid-in-capital 3,204,718 — 3,204,718

Deferred compensation payable in common shares 25,467 — 25,467

Common shares in grantor trust, 2,376,607 issued and outstanding as of June 30, 2026 (25,467) — (25,467)

Cumulative earnings 525,251 (29,914) (d) 495,337

Accumulated other comprehensive income (loss) 573 — 573

Cumulative distributions (3,041,100) — (3,041,100)

Total Brandywine Realty Trust's equity 691,182 (29,914) 661,268

Noncontrolling interests 4,718 — 4,718

Total beneficiaries' equity $ 695,900 $ (29,914) $ 665,986

Total liabilities and beneficiaries' equity $ 3,535,967 $ (92,305) $ 3,443,662

- 2 -

BRANDYWINE REALTY TRUST

UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS

For the Six Months Ended June 30, 2026

(in thousands, except share and per share data)

BDN Historical 3151 Market Street Disposition (Notes) Pro Forma

Revenue

Rents $ 243,355 $ (532) (e); (f) $ 242,823

Third party management fees, labor reimbursement and leasing 8,788 — $ 8,788

Other 3,781 — $ 3,781

Total revenue 255,924 (532) 255,392

Operating expenses

Property operating expenses 77,094 (835) (e) $ 76,259

Real estate taxes 23,006 (250) (e) $ 22,756

Third party management expenses 4,433 — $ 4,433

Depreciation and amortization 96,980 (3,106) (e) $ 93,874

General and administrative expenses 21,598 (38) (e) $ 21,560

Provision for impairment 11,909 — $ 11,909

Total operating expenses 235,020 (4,229) 230,791

Gain on sale of real estate

Net gain on disposition of real estate 63 — $ 63

Total gain on sale of real estate 63 — 63

Operating income 20,967 3,697 24,664

Other income (expense):

Interest and investment income 1,734 — $ 1,734

Interest expense (82,820) 2,174 (e) $ (80,646)

Interest expense - amortization of deferred financing costs (2,732) 22 (e) $ (2,710)

Equity in loss of unconsolidated real estate ventures (17,440) — $ (17,440)

Loss on early extinguishment of debt (24) — (24)

Net loss before income taxes (80,315) 5,893 (74,422)

Income tax provision (24) — (24)

Net loss (80,339) 5,893 (74,446)

Net loss attributable to noncontrolling interests 338 — 338

Net loss attributable to Brandywine Realty Trust (80,001) 5,893 (74,108)

Nonforfeitable dividends allocated to unvested restricted shareholders (566) — (566)

Net loss attributable to Common Shareholders of Brandywine Realty Trust $ (80,567) $ 5,893 $ (74,674)

PER SHARE DATA

Basic loss per Common Share $ (0.46) $ (0.43)

Basic weighted average shares outstanding 174,072,403 174,072,403

Diluted loss per Common Share $ (0.46) $ (0.43)

Diluted weighted average shares outstanding 174,072,403 174,072,403

- 3 -

BRANDYWINE REALTY TRUST

UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS

For the Year Ended December 31, 2025

(in thousands, except share and per share data)

BDN Historical 3151 Market Street Disposition (Notes) Pro Forma

Revenue

Rents $ 457,504 $ (37) (g) $ 457,467

Third party management fees, labor reimbursement and leasing 20,329 — $ 20,329

Other 6,621 — $ 6,621

Total revenue 484,454 (37) 484,417

Operating expenses

Property operating expenses 131,347 (17) (g) $ 131,330

Real estate taxes 43,602 — $ 43,602

Third party management expenses 10,245 — $ 10,245

Depreciation and amortization 176,428 (206) (g) $ 176,222

General and administrative expenses 42,031 — $ 42,031

Provision for impairment 63,392 23,648 (h) $ 87,040

Total operating expenses 467,045 23,425 490,470

Gain on sale of real estate

Net gain on disposition of real estate 9,396 — $ 9,396

Net gain on sale of undepreciated real estate (146) — $ (146)

Total gain on sale of real estate 9,250 — 9,250

Operating income 26,659 (23,462) 3,197

Other income (expense):

Interest and investment income 4,402 — $ 4,402

Interest expense (134,955) 10,502 (g) $ (124,453)

Interest expense - amortization of deferred financing costs (5,119) — $ (5,119)

Equity in loss of unconsolidated real estate ventures (57,681) (4,552) (i) $ (62,233)

Net gain on real estate venture transactions 183 — $ 183

Loss on early extinguishment of debt (12,244) (6,266) (j) $ (18,510)

Net loss before income taxes (178,755) (23,778) (202,533)

Income tax provision (112) — $ (112)

Net loss (178,867) (23,778) (202,645)

Net loss attributable to noncontrolling interests 620 — 620

Net loss attributable to Brandywine Realty Trust (178,247) (23,778) (202,025)

Nonforfeitable dividends allocated to unvested restricted shareholders (1,231) — (1,231)

Net loss attributable to Common Shareholders of Brandywine Realty Trust $ (179,478) $ (23,778) $ (203,256)

PER SHARE DATA

Basic loss per Common Share $ (1.03) $ (1.17)

Basic weighted average shares outstanding 173,464,402 173,464,402

Diluted loss per Common Share $ (1.03) $ (1.17)

Diluted weighted average shares outstanding 173,464,402 173,464,402

- 4 -

NOTES TO UNAUDITED PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS

Note 1. Basis of Presentation

The pro forma consolidated balance sheet as of June 30, 2026 and the pro forma consolidated statement of operations for the six months ended June 30, 2026 were derived from our historical consolidated financial statements included in our Quarterly Report on Form 10-Q as of and for the six months ended June 30, 2026. The pro forma consolidated statement of operations for the year ended December 31, 2025 was derived from our historical consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2025.

Note 2. Pro Forma Adjustments

3151 Market Street Disposition

On September 30, 2026, we completed the disposition of a 441,000 square foot office building, which includes one level of below grade parking containing 70 parking spaces, located at 3151 Market Street in Philadelphia, Pennsylvania, to an unrelated third party for a sales price of $240.0 million and net proceeds of approximately $233.7 million.

Balance Sheet Adjustments

(a) These adjustments represent the elimination of the carrying value of the assets and liabilities of the property disposed.

(b) This adjustment represents the approximately $233.7 million net proceeds received from the disposition of the property and the payment of $60.2 million related to the retirement of the Company's $57.3 million Commercial Property Assessed Clean Energy ("C-PACE") loan. The related pro forma adjustment has been included as the loan encumbered the sold property.

(c) This adjustment represents the repayment of the $56.1 million net carrying value of the C-PACE loan the property was encumbered by and the elimination of the prepaid interest associated with the C-PACE Loan of $3.3 million. The related pro forma adjustment has been included as the loan encumbered the sold property.

(d) This adjustment represents the pro forma $23.6 million provision for impairment and $6.3 million loss on early extinguishment of debt related to C-PACE loan repayment. The actual provision for impairment and loss on early extinguishment of debt recorded upon completion of this disposition may differ materially from the pro forma provision for impairment and loss on early extinguishment of debt as a result of events that occurred during the third quarter of 2026.

Statements of Operations Adjustments

(e) These adjustments represent the elimination of the revenue and expenses of the property disposed that were recorded during the six months ended June 30, 2026.

(f) Adjustment for the six months ended June 30, 2026 includes (i) $0.3 million of contractual base rent, (ii) $0.1 million of parking rent, and (iii) $0.1 million of straight-line rent adjustments, reimbursable tenant costs, and deferred market rent.

(g) These adjustments represent the elimination of the revenue and expenses of the property disposed that were recorded during the year ended December 31, 2025 for the period from when the venture was consolidated on December 17, 2025.

(h) This adjustment represents the pro forma provision for impairment has been presented as if the disposition of the property had occurred on January 1, 2025. The actual provision for impairment recorded upon completion of this disposition may differ materially from the pro forma provision for impairment as a result of events that occurred during the third quarter of 2026.

(i) On December 17, 2025, the Company acquired all of its partner's preferred equity interest in the 3151 Market Street Venture. As a result of the acquisition of the preferred equity interest, 3151 Market Street became a wholly owned asset that was consolidated in the fourth quarter of 2025. This adjustment represents the elimination of the equity in loss of unconsolidated real estate ventures from the 3151 Market Street joint venture for the period from January 1, 2025 to December 16, 2025, when the venture was not consolidated.

(j) This adjustment represents the pro forma loss on early extinguishment of debt related to C-PACE loan repayment and has been presented as if the disposition of the property had occurred on January 1, 2025. The related pro forma adjustment has been included as the loan repayment was completed prior to the consummation of the disposition and was required as a condition of the buyer's acquisition of the property. The actual loss on early extinguishment of debt recorded upon completion of this disposition may differ materially from the pro forma loss on early extinguishment of debt as a result of events that occurred during the third quarter of 2026.

- 5 -

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.3

Document and Entity Information Document

Sep. 30, 2026

Document Information [Line Items]

Document Type

8-K

Document Period End Date

Sep. 30, 2026

Entity Registrant Name

BRANDYWINE REALTY TRUST

Entity Incorporation, State or Country Code

Entity File Number

001-9106

Entity Tax Identification Number

23-2413352

Entity Address, Address Line One

2929 Arch Street

Entity Address, Address Line Two

Suite 1800

Entity Address, City or Town

Philadelphia

Entity Address, State or Province

Entity Address, Postal Zip Code

19104

City Area Code

610

Local Phone Number

325-5600

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Common Shares of Beneficial Interest

Trading Symbol

BDN

Security Exchange Name

NYSE

Entity Emerging Growth Company

false

Entity Central Index Key

0000790816

Amendment Flag

false

Brandywine Operating Partnership, L.P.

Document Information [Line Items]

Entity Registrant Name

BRANDYWINE OPERATING PARTNERSHIP, L.P.

Entity Incorporation, State or Country Code

Entity File Number

000-24407

Entity Tax Identification Number

23-2862640

Entity Emerging Growth Company

false

Entity Central Index Key

0001060386

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:

dei_DocumentInformationLineItems

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Details

Name:

dei_LegalEntityAxis=bdn_BrandywineOperatingPartnershipL.P.Member

Namespace Prefix:

Data Type:

Balance Type:

Period Type: