What is the CAGR of an investment that grew 5x in 15 years?

Based on these numbers, the CAGR works out to about 11.33%.

15 years

What is CAGR?

CAGR (Compound Annual Growth Rate) is the constant annual rate at which a single investment would need to grow to go from its beginning value to its ending value over a given period — it assumes one entry and one exit, unlike XIRR which handles multiple cash flows.