text: how do i find my old 401k money? i left that company in 1996, and i have no idea on how to find it and get it.   i would call the company first. you can also check the treasury department website for the state you are in. there should be an "unclaimed" section. you should be able to enter your name and it will search for any money owed to you that has gone unclaimed. it will give you details on how to claim the cash. i went on the ca treasury site and found over $100 bucks for my sister. it was from a company she worked for and had no idea she had one last check coming.  it is fun!