Does a bank actually hold my shares in a company, or is it like cash?

A bank doesn’t hold every dollar that I have in a bank, they just have to maintain a certain amount of liquidity

Is it the same with stocks? Say I have a self investment account where I have 5 shares of AAPL. Is the bank actually holding those 5 shares or are they maintaining a certain amount of liquidity for those stocks? If there is a run on the bank, do my shares in apple actually get returned to me?