What public Form 5500 filings show about the Mainframe Management LLC 401(k) plan — and how to find and check your own account.
Mainframe Management LLC (EIN 83-4493221) reports MAINFRAME MANAGEMENT LLC 401(K) PLAN on its most recent Form 5500, with $350K in plan assets across 3 active participants. Form 5500 is the annual report employers file with the U.S. Department of Labor for their retirement plans, and it’s public.
See the full Mainframe Management LLC filing — schedules, fees, and providers.
Mainframe Management LLC’s Form 5500 doesn’t separately disclose a recordkeeper we can confirm. The firms named on its Schedule C are service providers — which can include investment managers, trustees, and auditors, and are not necessarily the company that runs your account. To find who runs your 401(k), check your enrollment paperwork or a recent statement, or ask Mainframe Management LLCHR for the recordkeeper’s name and login.
