Personalis, Inc. (Nasdaq: PSNL) commenced an underwritten public offering of $100 million of its common stock. In addition, Personalis expects the underwriters to be granted a 30-day option to purchase up to an additional $15 million of common stock from a selling stockholder on the same terms and conditions. Personalis will not receive any proceeds from any sale of shares by the selling stockholder.

The offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed or as to the actual size or terms of the offering.

BofA Securities, Citigroup and Cowen are acting as joint book-running managers. BTIG, Needham & Company and Oppenheimer & Co. are acting as co-managers.