A company closing its doors does not take your 401(k) with it. Plan assets are held in a trust, legally separate from company money, out of reach of the company's creditors. What a shutdown or acquisition does do is move your account, and the move is where people lose track of it.
If the company was acquired
The acquirer usually either merges the old plan into its own or keeps it running separately for a while. Either way, the surviving company's HR inherited the records. Look up both the old company and the acquirer here: the old employer's plan page shows its filing history and who its recordkeeper was, and its health-plan page will often show the name changes on record, because renames and mergers show up in the filings themselves.
If the company shut down
A closing company is supposed to terminate the plan and distribute the money: to you, at your last known address, or into an IRA opened in your name. When the company disappears without doing the paperwork, the Department of Labor appoints an administrator; those plans are searchable in the DOL Abandoned Plan database.
Where the money typically lands
- Balances under about $1,000 — often cashed out as a mailed check; uncashed checks flow to state unclaimed property.
- Balances up to $7,000 — commonly force-rolled into a safe harbor IRA at a custodian you've never heard of.
- Larger balances — usually transferred intact to the successor plan or an IRA; the plan's final filing names who handled it.
The fastest route
Start with our find-your-old-401(k) lookup: type the employer, open the plan page, and note the recordkeeper, including the by-year history if the plan changed hands. That name plus your Social Security number and employment dates is what unlocks the account, whoever ended up holding it. Everything in this process is free; never pay a fee to "locate" a 401(k).