Smalltalk was never owned by a single company since the first public release in 1980. Common Lisp was born in cooperation between Symbolics, Texas Instruments,

Smalltalk was never owned by a single company since the first public release in 1980. Common Lisp was born in cooperation between Symbolics, Texas Instruments, Xerox, CMU and was never owned by a single company either. Neither of them exclusively had closed-source implementations.