Online coupon and deal site Groupon has brought in Brunswick to shore up its financial communications ahead of a highly anticipated initial public offering.

The Chicago-based company filed its IPO registration statement June 2 with the SEC as reports have set a lofty valuation at around $30B. Media have been quick to point out that figure surpasses Google’s value when it went public.

Groupon is expected to lead a small group of social and digital properties eying public markets that includes Facebook gaming giant Zynga, Internet radio service Pandora, and Facebook itself.

Brunswick is supporting Groupon’s internal staff led by agency vet Julie Mossler on financial PR matters. The company continues to work with Chicago-based SS|PR as well.

The IPO could rake in $3B for Groupon, which had $644.7M in revenue in the first quarter.