Matthew Elliott, CEO of pro-Brexit Vote Leave, was a partner at Awareness Analytics Partners (A2P) which has links to Trump, DeVos and the Koch brothers
A2P was started in 2015 by Samantha Ravich who was on the Trump transition team, A2P partner Sean Noble runs a nonprofit funded largely by the Koch brothers, and A2P developed an app with a think tank funded by the DeVos family and Koch brothers.