Snap, owner of the popular messaging app Snapchat, is seeking a valuation of between $16.20 billion and $18.52 billion in its highly awaited initial public offering. 

The company had filed for an IPO earlier this month.

It  was widely expected to be valued at between $20 billion and $25 billion, giving it the richest valuation in a US technology IPO since Facebook. 

Investors have raised concerns about competition from Facebook and Alphabet Inc's Google, widening losses and the firm control of its founders even as the California-based company readies to hit the road to pitch the offering. 

Snap said in a filing today that it expects to raise as much as $3.2 billion from the offering of 200 million Class A share. The offering is expected to be priced between $14 and $16 per share. 

Selling shareholders will sell 55 million shares and the remaining will be sold by the company. 

Snap will have about 1.16 billion shares outstanding after the offering and list on the New York Stock Exchange under the symbol SNAP. 

The company said it expects to use proceeds of about $2.1 billion for general corporate purposes and to acquire businesses, among other things. 

Snap, which launched in 2012 with an app that sends disappearing messages, rebranded itself last year as a camera company and started selling $130 video camera glasses. 

Revenue surged to $404.48 million for year ended December 31. However, net loss widened to $514.64m from $372.89m a year earlier, hurt by higher costs. 

Snap's co-founders Evan Spiegel and Bobby Murphy will hold 14.5% of Class A shares each, after the offering, down from 21.8%. 

But the founders will maintain tight control over Snap's stock through a unique three-share class structure. 

The structure will give Spiegel and Murphy the right of 10 votes for every share. Existing investors will have one vote for each of their shares, while new investors will have no voting rights. 

The company generates the majority of its revenue from advertising, seeking to challenge the dominance of existing internet giants. 

Facebook's Instagram, which recently introduced disappearing video content, had 600 million users as of late last year. Like Snapchat, Instagram sells advertising on its platform.