Brandywine Realty Trust Files Shelf Offering For Up To $300M In Equity And $1.2B In Debt Securities

BRANDYWINE REALTY TRUST

Preferred Shares

Common Shares

Depositary Shares

Subscription Rights

and

Warrants

BRANDYWINE OPERATING PARTNERSHIP, L.P.

Debt Securities

Brandywine Realty Trust may offer from time to time its common shares, preferred shares, depository shares, subscription rights or warrants with a total initial offering price of up to $300,000,000 under this prospectus. The common shares of Brandywine Realty Trust are listed on the New York Stock Exchange (the "NYSE") under the symbol "BDN." On March 9, 2026, the last reported sale price of our common shares on the NYSE was $3.07 per share. Brandywine Operating Partnership, L.P. may offer from time to time its debt securities in one or more series with a total initial offering price of up to $1,200,000,000 under this prospectus. Brandywine Realty Trust will unconditionally guarantee the payment obligations of the debt securities.

We will offer the securities at prices and on the terms to be determined at the time of offering. We may offer and sell these securities to or through one or more underwriters, dealers and agents, or directly to purchasers, on a continuous or delayed basis.

This prospectus describes some of the general terms that may apply to these securities. The specific terms of any securities to be offered will be described in a supplement to this prospectus. We may describe the terms of these securities in a term sheet that will precede the prospectus supplement.