US-based WhaleShark operates a portfolio of online coupon and deal sites and has now made six acquisitions since its 2009 foundation with its most recent deal for RetailMeNot.com in November 2010.

According to a statement VoucherCodes.co.uk has four million visitors to the site each month.

Cotter Cunningham, chief executive officer of WhaleShark Media, says: ‘eConversions provides extraordinary value to both its merchant partners and its consumers.’

Established in 2004 by Duncan and Max Jennings, VoucherCodes.co.uk was launched in 2008 to provide deals for restaurants and online stores.

Duncan Jennings adds: ‘The expertise and resources of the WhaleShark team will allow eConversions to provide our consumers with even better deals and position us perfectly for future growth and expansion.

Under the terms of the deal, which is for an undisclosed amount, the two websites are to remain independent brands and continue to operate from offices in London.

Other websites operated by WhaleShark Media includes: Deals.com, Deals2Buy.com, CheapStingyBargains.com, CouponSeven.com and CouponShare.com. The Texas-based business is funded by venture capital firms Austin Ventures, Norwest Venture Partners, Adams Street Partners and Google Ventures.