Irvine-based Habit Restaurants Inc. said it would offer up to 5.75 million shares of its Class A common stock owned by various stockholders, including some officers and directors, for sale on April 9.

The shares are worth about $175 million at Tuesday's closing price of $30.34, with the company's market cap at about $830 million in midday trading Wednesday.

Underwriters of Habit’s November 19, 2014, initial public offering waived the original lock-up date of May 19, 2015, for these shareholders, the company said.

Habit went public as a “controlled company” since 55% of its voting power was controlled by Greenwich, Conn.-based private equity firm KarpReilly LLC.

The company will no longer be considered a controlled company under the Nasdaq market’s corporate governance rules once the pending sale is complete.

Habit operates about 100 fast-casual burger restaurants in four states.