Comcast Ventures and GV are both selling shares in an upsized offering that will give the digital signature technology developer a $4.4bn market cap.

US-based digital signature technology provider DocuSign will float today in a $629m initial public offering in which internet and technology conglomerate Alphabet and mass media group Comcast are both selling shares.

The shares were priced at $29 yesterday, above the $24 to $26 range the company set last week, and the price will give DocuSign a market capitalisation of more than $4.4bn.

The company is issuing just over 16 million shares on the Nasdaq Global Select Market, for almost $466m…