As the head of the company Wences Casares stated, the BTC ticker will be awarded to the chain with the greatest difficulty.
— Wences Casares (@wences) 10 октября 2017 г.
As noted in the new message on the Xapo blog, the company's position on the upcoming hardfork is identical to the one it took before the Bitcoin cash hardfork. Users of the service, therefore, will have access to both coins after the fork, however, which chain will be considered as a real bitcoin, Xapo at a given moment can not say.
Xapo’s policy in regards to forks is that, when there is a fork, we always follow the chain with the most accumulated difficulty and we make the minority chain available to our customers for them to sell or withdraw from Xapo.
We are going to call the chain with the most accumulated difficulty Bitcoin or BTC . If the minority chain is the one with 1MB blocks we are going to call it BC1 and if the minority chain is the one with 2MB blocks we are going to call it BC2.
Co-Founder and COO, Xapo
Xapo was one of the companies that signed an agreement on the activation of SegWit2x. To date, however, the project has not done any additional official announcements.