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): July 922, 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 2.0102 ~~Completion~~Results of ~~Acquisition~~Operations orand ~~Disposition~~Financial ~~of Assets.~~Condition

~~Brandywine~~The ~~Realty~~information ~~Trust~~in ~~(the~~this ~~"Parent~~Item ~~Company")~~2.02 is- ~~the~~“Results ~~sole general partner~~ of ~~Brandywine~~Operations ~~Operating~~and ~~Partnership~~Financial Condition,” ~~L.P.~~including (the ~~"Operating~~press ~~Partnership")~~release ~~and~~attached ~~owns~~as ~~its~~an ~~assets~~exhibit ~~and~~to ~~conducts~~this ~~its~~Current ~~operations~~Report, ~~through~~is ~~the~~being ~~Operating~~furnished ~~Partnership~~ and ~~subsidiaries~~shall ofnot ~~the~~be ~~Operating~~deemed ~~Partnership.~~to ~~The~~be ~~Parent~~“filed” ~~Company~~for any purpose, ~~the~~including ~~Operating~~for ~~Partnership~~the ~~and~~purposes ~~their~~of ~~consolidated~~Section ~~subsidiaries~~18 ~~are~~of ~~collectively~~the ~~referred~~Securities toExchange inAct ~~this~~of ~~report~~1934, as amended (the ~~"Company."~~“Exchange ~~On July 9~~Act”), ~~2026,~~or ~~the~~otherwise ~~Company~~subject ~~completed~~to the ~~disposition~~liabilities of athat ~~206~~Section,~~000~~ ~~square~~and ~~foot~~shall ~~office~~not ~~building~~be ~~and~~deemed ~~its~~incorporated ~~520-space~~by ~~above~~reference ~~ground~~into ~~parking~~any ~~garage~~filing ~~located~~under inthe ~~Austin,~~Securities ~~Texas,~~Act toof an1933, ~~unaffiliated~~as ~~third~~amended, ~~party~~or ~~for~~the aExchange ~~sales~~Act ~~price~~regardless of ~~$151.0~~any ~~million~~general ~~and~~incorporation ~~net~~language ~~proceeds~~in ofsuch ~~approximately $146~~filing.~~1 million.~~

On July 22, 2026, we issued a press release announcing our financial results for the six months ended June 30, 2026. That press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

The press release includes “non-GAAP financial measures” within the meaning of the Securities and Exchange Commission's Regulation G. With respect to such non-GAAP financial measures, we have disclosed in the press release the most directly comparable financial measure calculated and presented in accordance with generally accepted accounting principles (“GAAP”) and have provided a reconciliation of such non-GAAP financial measures to the most directly comparable GAAP financial measure.

Item 9.01 Financial Statements and Exhibits

(a) N/A


Exhibit						Description
99.1						Brandywine Realty Trust Press Release dated July 22, 2026.
104						Cover Page Interactive Data File (embedded within the Inline XBRL document).

(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 three months ended March 31, 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: July 1023, 2026

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