Ambiq Micro (AMBQ) said late Thursday it priced an upsized underwritten offering of about 2.7 million of its common shares at $31 per share, for $81.7 million in expected gross proceeds.

Ambiq said 2.6 million of its common shares will be offered by the company, and 42,949 of its common shares will be offered by certain of its stockholders. Ambiq said it will not receive any proceeds from the sale of its shares made by the selling shareholders.

The company has provided a 30-day option to the underwriters to buy up to an additional 401,940 of its common shares.

The offering is expected to close on Monday.