>>11021622From what I know (and I dont know much), stochastic calculus analyses functions with random noise factored in and is used in quantitative finance. As other anons mentioned, pdes such as the Black Scholes equation are used to model the dynamic nature of price data (Black Scholes is used to calculate the value of options). Machine learning is probably used in quant finance (I'm guessing), which uses multivariable calculus to calculate gradients. I'm sure theres much more but that's just off the top of my head.
