A Manhattan judge has dismissed claims against the New York Stock Exchange and its chief executive officer, John A. Thain, finding that the plaintiff, a former seat holder in the exchange, attempted to commit insider trading.

Plaintiff Allison L. Wey purchased the seat from her father in 2000 for $1.1 million. She leased it to Bear Wagner Specialists, where her husband worked, and sold it on March 21, 2005, for $1.5 million.