ATC now have a dedicated UK based cabinet manufacturer. Also, seeing some of the guesstimates about how many speakers ATC are making in this thread are incredibly wrong. Most of them out by a factor of more than 10.
I sense a degree of dismissal towards ATC on this forum. The fact of the matter is, they're more or less the most popular choice of speaker in almost all studio (many of which are to be frank, rather cash strapped most of the time). Genelec, Neumann, Adam, PMC etc have all done the rounds and can also be found alongside ATCs, but SCM25s or increasingly 45s have become the industry standard monitor in the UK for a good reason.
I'm unashamedly a fan of ATC speakers but there are plenty of other good monitors on the market though. I've just come back from a tracking session on KH150s. Superb speakers which I rate very highly, would I prefer ATCs to work on? Yes... but the Neumanns are superb especially when you consider the price.
In terms of measurements, I'm still yet to see any trustworthy serious measurements on which this bias against ATC can be justified (aside from the SCM19 mk1 Amir measured, which is admittedly not their crowning achievement). However, there are plenty of examples on this forum (and even in this thread) of in-room measurements and even some off-axis measurements suggesting very good performance.