What Ogden a philosophical semanticist?

No, C.K. Ogden was not a philosophical semanticist. He was a British linguist and philosopher of language who is best known for his work on the theory of meaning and the development of the Basic English language. Ogden was a co-founder of the Orthological Institute, an organization dedicated to the study of language and the improvement of communication. He also collaborated with I.A. Richards on the development of the theory of Basic English, a simplified version of the English language designed for international communication. Ogden's work on language and meaning has had a significant influence on the field of semantics, but he is not considered a philosophical semanticist in the same sense as other figures such as Gottlob Frege, Bertrand Russell, or Alfred Tarski.