What are former associates doing with their 401k?

I worked for the company for just over a decade before I had to move to a location without In N Out :(

It's been about 4 years and I was wondering what other former associates have done with their 401k provided they didn't stay with the company through retirement. I'm not totally sure how to go about looking into who it's with and what my options are as far as rolling it over or converting to an IRA?

Any former/ current associates who know who I need to talk to about this since I can't login through the associate link anymore would be super helpful! Thank you!