Martini will not continue to sponsor Williams after the end of 2018. The brand's famous red, white, blue colour scheme returned in Formula 1 in 2014, when they signed a multi-year deal with Williams.
The two sides, Bacardi Group and Williams discussed about an extension of the current sponsorship, but the deal fell through. The Bacardi Group, which owns Martini, is believed to have decided to divert their resources from F1 as the competition no longer aligns with their strategic interests.
Williams deputy team principal, Claire Williams told Autosport: "We have discussed extending beyond 2018. While we would both like to do so, the Bacardi Group have told us that they will step away entirely from Formula 1 when our contract expires at the end of this year. They have many brands to support and obviously their strategic priorities evolve over time."
Williams has also received significant sponsorship money from SMP Racing as part of the Sergey Sirotkin deal. Also, Lawrence Stroll, is another major source of money. Claire Williams suggested that the team remains financially stable, though Martini's departure is a major blow.
Martini will continue to work with Williams throughout 2018 as they celebrate their 50th anniversary of Martini Racing.