The Necco plant in Revere was abruptly shut down Tuesday after the entity that bought the company at bankruptcy auction in May announced it had sold Necco to another candy manufacturer.

Round Hill Investments LLC, which bought the company for $17.3 million at emergency auction in May, confirmed the closure in a statement late Tuesday.

“Round Hill Investments was very excited to acquire NECCO’s historic brands and to be part of their national resurgence,’’ the company said. “After careful engagement and consideration however, the firm decided to sell the brands to another national confection manufacturer and today announced the closure of the operations in Revere, Massachusetts.’’