Nov 3 (Reuters) - Realty Income O.N narrowed its annual adjusted funds from operations forecast on Monday, as the real estate investment trust navigates an uncertain macroeconomic environment.

The company has a portfolio of more than 15,500 commercial properties, and counts Walgreens and Dollar General DG.N among its customers.

Realty Income now expects 2025 adjusted FFO of $4.25 to $4.27 per share, compared to its prior forecast of between $4.24 and $4.28 apiece.

The company's same-store rental revenues in the third quarter increased 1.3% to $1.16 billion, compared with $1.15 billion in the same period a year ago.

Revenue rose to $1.47 billion, beating analysts' average expectation of $1.38 billion, according to data compiled by LSEG.

The San Diego, California-based company reported adjusted FFO of $1.08 per share for the quarter ended September 30, exceeding expectations of 1.07 per share.

Shares of the company were down marginally in after-hours trading.

(Reporting by Anshuman Tripathy in Bengaluru; Editing by Alan Barona)

((Anshuman.Tripathy@thomsonreuters.com))