Former Goldman Sachs Group Inc. computer programmer Sergey Aleynikov pleaded not guilty to federal charges that he stole trading software from the banking company.

Aleynikov, 40, entered his plea Wednesday before U.S. District Judge Denise L. Cote in New York. The judge set a trial date of Nov. 29.

Aleynikov was arrested in July and indicted Feb. 11. A prosecutor said during a July court appearance that the alleged theft is the "most substantial" Goldman can recall. The programmer stole code on his last day at the company in June, according to the indictment.

"The defendant has taken source code at various other times during the course of his employment," Assistant U.S. Attorney Joseph P. Facciponti told Cote.

Aleynikov's lawyer, Sabrina P. Shroff, declined to comment after the hearing.

According to the indictment, Aleynikov's last day at Goldman was June 5, before he left to join Teza Technologies LLC, a Chicago firm co-founded by Misha Malyshev, a former Citadel Investment Group LLC trader.

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