Springbok Dixon sought arbitration to resolve a particular clause in his contract, which runs until June 2027. The independent process found Dixon's contract is binding, with no revisions applicable.
Stormers Director of Rugby John Dobson said that with the arbitration behind them, he looks forward to seeing Dixon give his all for the team, as he has done throughout his career.
"Ben-Jason is one of the most committed rugby players around and has been a vital cog in our team for some time," Dobson told the Stormers' website.
"With this now settled, we know that he will continue to give everything on and off the field for us."
Dixon said that with the matter now resolved, he is looking forward to making an impact on the field once again.
"I'm really grateful that both sides had the chance to bring everything to the table through arbitration and get clarity going forward. With this behind us, I'm looking forward to getting back to doing what I love - giving my best for the Stormers."
Meanwhile, Simelane has made great strides and provided a crucial creative spark since joining the Stormers in 2024.
Blessed with quick feet and a natural ability to find and exploit space, Simelane has fitted seamlessly into a talented backline and will continue to threaten defences in the blue and white jersey going forward.
"Wandi has got incredible natural talent which has marked him as a dangerous player from a young age," said Dobson.
"What we have been particularly impressed with is his willingness to learn and develop his game. He has an incredibly high ceiling and we are looking forward to seeing what he can do and add to our team going forward."
Simelane said that the decision to extend his contract was an easy one given the unique environment in Cape Town.
"At the Stormers, players are encouraged to express themselves and make the most of their abilities," said the 27-year-old.
"I feel that I have grown as a player since moving here and Iâm looking forward to seeing where this team can go."