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 of proceeds, while its shareholders are selling almost $164m of shares in the offering.

DocuSign has developed a e-signature platform it claims has hundreds of millions of users, including some 370,000 businesses. It more than halved its net loss to $52.3m in the year running up to January 2018 while increasing revenue 36% to more than $518m.

The offering comes after some $525m of funding since 2003, including a $300m series F round in 2015 featuring chipmaker Intel’s corporate venturing arm, Intel Capital, as well as computer producer Dell and telecommunications firm Deutsche Telekom.

The series F, which valued the company at $3bn, was rounded out by Brookside Capital, Bain Capital Ventures, ClearBridge Investments and Generation Investment Management.

Second Century Ventures, the venture capital fund formed by the National Association Of Realtors, invested an undisclosed amount in the company in a 2009 deal that followed its series B round.

DocuSign subsequently raised $27m in a Scale Venture Partners-led round that included Salesforce Ventures, the corporate VC subsidiary of enterprise software provider Salesforce, as well as Sigma Partners, Ignition Partners, Frazier Technology Ventures the following year.

Alphabet subsidiary GV, then known as Google Ventures, provided $8.2m of the $55.7m the company received in a 2012 series D round also backed by Comcast unit Comcast Ventures, Sapphire Ventures (then SAP Ventures), Kleiner Perkins Caufield & Byers (KPCB) and Accel.

GV, Comcast Ventures, Salesforce, SAP Ventures, Sigma WestScale Venture Partners, Ignition Partners, Frazier Technology Ventures, KPCB, Accel and Sands Capital Ventures added $85m in early 2014 at a $1.6bn valuation.

DocuSign secured $115m in a series E round that closed later the same year, getting cash from NTT Finance, the owner of telecoms firm NTT; Samsung Ventures and BBVA Ventures, vehicles for electronics maker Samsung and bank BBVA; human resources firm Recruit and conglomerate Mitsui.

The corporates were joined by EDBI, the investment arm of the Singaporean government’s Economic Development Board, Scale Venture Partners, Ignition Partners, KPCB and Accel.

Other investors in DocuSign include telecoms group Telstra’s corporate venturing unit, Telstra Ventures, as well as payment services provider Visa, WestRiver Capital, Wasatch Advisors, Cross Creek Advisors and Wellington Management.

GV is selling 407,000 shares for a total of $11.8m, diluting its stake in the company from 1.4% to 1%. Comcast Ventures is divesting almost 48,000 shares for $1.4m, equating to 10% of its stake.

Sigma Partners, DocuSign’s largest shareholder, is selling $24.9m of shares and will come out with a 10.8% stake, down from 12.7%. Second Century Ventures will make $46.4m from its share sale, reducing its stake from 4.1% to 2.6%.

The other selling investors are Ignition Partners ($22.7m with a 9.8% stake post-IPO), Frazier Technology Ventures ($14.4m/6.1%) and Scale Venture Partners ($14m/2.9%).

Morgan Stanley and JP Morgan are the lead book-running managers for the IPO while Citigroup, BofA Merrill Lynch and Deutsche Bank Securities are also book-running managers. JMP Securities, Piper Jaffray and William Blair are co-managers.

The underwriters have a 30-day option to buy just over 3.2 million additional shares, pushing the size of the offering to approximately $703m.