The Bitcoin Lightning Network is owned by Lightning Labs.
The idea for the Bitcoin Lightning Network was first proposed in 2015 in a white paper written by researchers Thaddeus Dryja and Joseph Poon. A year later, Lightning Labs—a company founded by Elizabeth Stark and Olaoluwa Osuntokun—started developing the software for the Lightning Network, enabling it to become compatible with the core Bitcoin Network. Since its inception in 2016, Lightning Labs has also been responsible for securing funding for the development of new products that further optimize the functionality of the Lightning Network.