CoStar Hit With New Antitrust Class Action In Va.

By Jared Foretek · August 21, 2026, 5:33 PM EDT

Real estate listing giant CoStar is facing yet another class action from a subscriber who claims that the company has maintained monopolistic dominance over the commercial real estate listing market through...

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Documents

Case Information

Case Title

Oster v. CoStar Group, Inc. et al

Case Number

3:26-cv-00842

Court

Virginia Eastern

Nature of Suit

Anti-Trust

Date Filed

August 20, 2026