I have had 10 jobs now and had to rollover my 401K 6 times. I call the financial institution, they send me a check made out to “Vanguard FBO (for the benefit of) $MyName” and mail it to Vanguard with a form.

Now you can do it electronically by taking a picture of the check. When I’m done with the company I’m done. I sold all of my RSUs when I worked for BigTech as soon as they vested and diversified too.