It is not so cut and dry. Here are different scenarios:
1. Public companies - They are driven by the need to enhance "shareholder value" and stock prices. In case of stock market crash, they will go back to the drawing table, re-assess their spending and cut a lot of projects, anything they deem to be not "critical". It can range from a cutting edge project, for which they don't see a pay off real soon to mundane stuff like support.
2. Startups - There are not many out there which are consistently profitable. Some of them need influx of money to keep running. A crash will cause a severe cash crunch.
3. Private Companies - Some of them might have their customers/suppliers being affected a lot.
Unlike what people like to believe stock market crash is not only about stocks. It affects a lot of things. Major one of them being money supply. Many people rely on Overdrafts or current accounts, I am not sure if that is what they are called in US, to run businesses. After crash businesses are put in a lot of pressure to up keep their accounts and run near real time cash business, something which affects a lot of things.
Unlike what people like to believe stock market crash is not only about stocks. It affects a lot of things. Major one of them being money supply. Many people rely on Overdrafts or current accounts, I am not sure if that is what they are called in US, to run businesses. After crash businesses are put in a lot of pressure to up keep their accounts and run near real time cash business, something which affects a lot of things.