Sunando Sen, 46, lived in Queens and was one of the owners of New Amsterdam Printing Co. in New York, the Daily News newspaper in New York reported.
Sen was killed Thursday night at an elevated station in Sunnyside, Queens. Witnesses said a woman who appeared to be in her 20's pushed Sen onto the tracks.
Police released videotape from a security camera Friday that showed the suspect running from the station after Sen's death. She remained at large late Friday.
Sen appears to have been a random victim. Others waiting on the subway platform said the woman, described as heavyset and of Hispanic appearance, had been talking to herself as she walked the platform, then sat on a bench, got up again, followed Sen along the platform and shoved him to the tracks as a train approached.
By the time the train halted, his body was under the second car.
A roommate, Ar Suman, said Sen had long wanted to own an independent business and achieved the dream six months ago.
"He was a nice and quiet and very good person," Suman said. "Seven days a week he worked. He wanted to be his own boss."
Sen was originally from Kolkata. His business partner was trying to reach relatives in India.
Earlier this month in a similar incident, another Queens man was killed at a subway station in Manhattan. A homeless man has been charged with murder in that case.