How to Find a Company's 401(k) Provider
If a company sponsors a 401(k) with 100 or more participants, the recordkeeper, custodian, and advisor it pays are public — reported on Form 5500 Schedule C. Here's how to find them in a couple of minutes.
Last updated June 2, 2026
Step 1 — Search by company name or EIN
Start from the search and type the employer's name (or its 9-digit EIN). Matching plans show the sponsor, plan name, assets, and participant count so you can confirm you have the right plan.
Step 2 — Open the plan and read the providers
On the plan page, the service-provider section lists each firm from Schedule C, tagged by role — recordkeeper, custodian/trustee, advisor, auditor, and so on — along with the compensation reported. That tells you who actually administers and advises the plan.
Step 3 — Research the provider across its book
Click a provider to see every plan it serves, total assets under service, and fee patterns. This is useful for benchmarking a quote, scoping a competitor's footprint, or building a prospect list.
A caveat for small plans
Plans with fewer than 100 participants usually file Form 5500-SF, which does not include Schedule C. For those, the public record won't name the provider — though assets, participants, and plan type are still available.
Search ~2.9 million Form 5500 filings by company, EIN, or plan name — assets, participants, providers, and holdings.
Search filingsFrequently asked questions
Yes. For plans with 100+ participants, the recordkeeper, custodian, and advisor are disclosed on Form 5500 Schedule C, which is public and free to search.
Small plans typically file Form 5500-SF, which omits Schedule C, so their service providers aren't publicly reported.