Barclays, Lloyds, Worthington Brewery and Grant Thornton are among corporate groups that will join 1,200 guests at a dinner event to celebrate 40 years since the Scarlets rugby team beat the All Blacks.
The event at Parc y Scarlets in Llanelli will see guests join New Zealand Rugby Union president Bryan Williams and Welsh Rugby Union president Dennis Gethin to mark the occasion.
On 31 October 1972, the Scarlets beat the All Blacks 9-3 at Stradey Park.
The evening is sponsored by Carmarthenshire’s Owens Transport, which is also celebrating its 40th anniversary in business this year.
Scarlets managing director Mark Davies said: "The pride in the Scarlets history, heritage and culture is very strong in this region and the spirit of who we are today is defined by some great moments in our history.
"We are delighted to have the facilities here to create an event worthy of these players and to thank them and all those who have dedicated their time and served our region and club so passionately over decades.
"We want to have a night fitting of that win, to show our spirit and camaraderie as a region and respect our great heritage. I’m sure it will be night to remember for everyone at Parc y Scarlets."