Hayes revealed that talks are at an "advanced stage" with four interested parties.
The Wasps chief announced in October that he was putting the club up for sale after Wycombe District Council withdrew its support for the development of a new stadium.
Wasps said in a statement on Friday evening that a "large number of parties had expressed interest" but that discussions were now focused on the "final four".
The statement added: "No preferred party has yet been selected but the club is confident that the process is now nearing conclusion."
Hayes, who also owns Wycombe Wanderers, reiterated a key factor in the final decision will be the "plans for and ability to offer the club a sustainable and successful future".
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.