One of the city’s most glamorous penthouses — a 12,000-square-foot triplex atop The Pierre hotel — is about to hit the market, sources told The Post.

The co-op, which has a ballroom, four terraces, five fireplaces and Central Park views, “could sell for $100 million to $120 million or higher,” a source said.

Its owner, investor Martin Zweig, known for predicting the 1987 stock market crash, died last month at age 70.