Emilija Manevska | Moment | Getty ImagesArtificial intelligence startup Cursor on Thursday announced it has closed a $2.3 billion funding round at a $29.3 billion post-money valuation, nearly triple what it was worth as of its last raise in June.Tune in at 4:30 p.m. ET as Cursor CEO Michael Truell joins "Closing Bell: Overtime" to discuss the funding round. Watch in real time on CNBC+ or the CNBC Pro stream.Cursor built a popular AI coding tool that helps software developers generate, edit and r...