Jaeger-LeCoultre is a luxury Swiss watch brand founded in 1833; in the early days of the brand, they created most of the movements for Patek Phipplpe, Audemars Piguet and even Vacheron Constantin, and this is why they are often called the watchmaker's watchmaker. JLC have nothing to offer besides refined, advanced watches with a rich heritage.
Jaeger-LeCoultre is owned by a Swiss luxury goods company called Richemont. Richemont owns many luxury goods companies, including Cartier, Van Cleef, IWC, Vacheron Constantin and more.