Data updates
This site holds two government sources and refreshes them on two different clocks. What follows is when each one last moved, read from the records themselves rather than from a log kept by hand.
DOL Form 5500: assets, participants, fees, recordkeepers
The Department of Labor publishes every Form 5500 filing as bulk files and reissues them each month. The whole Form 5500 side of this site is rebuilt from one release at a time, so it has one refresh date and not a range. All 57,824 plan records the site reads name that same release today.
| Form year published | 2024 |
|---|---|
| Release last modified by the DOL | July 28, 2026 |
| Plan records read from it | 57,824 |
| Refresh schedule | Checked on the 2nd of each month |
The DOL datasets page ↗ · EFAST2 filing search ↗
A refresh brings in newly filed returns and corrections to filed ones. It does not make the figures more recent than the plan years they report: a plan may file up to 9½ months after its year ends. How old the data is, and why
SEC Form 11-K: match formulas, vesting, enrollment
A public company whose 401(k) plan holds its own stock files a Form 11-K with the SEC each year, so this side of the site gains filings one at a time rather than in a monthly batch. It currently holds 385 plan records read from filings by 319 employers. The most recent filing on the site was submitted to the SEC on August 25, 2026.
The table below groups those filings by the month the employer filed them, which is the nearest thing to a change log this site can state as a fact: each row is a set of documents anyone can open on EDGAR and check against the pages built from them. A month with no filings has no row.
| Filed | Filings held | Employers |
|---|---|---|
| August 2026 | 2 | 2 |
| July 2026 | 4 | 4 |
| June 2026 | 347 | 288 |
| May 2026 | 8 | 6 |
| April 2026 | 1 | 1 |
| March 2026 | 5 | 4 |
| December 2025 | 1 | 1 |
| November 2025 | 1 | 1 |
| October 2025 | 2 | 2 |
| July 2025 | 1 | 1 |
| June 2025 | 12 | 9 |
| May 2025 | 1 | 1 |
Search EDGAR for a company’s 11-K ↗
Filings cluster heavily in one month of the year. An 11-K is due up to 180 days after the plan year ends, and most plan years end on December 31, so most calendar-year filers arrive in June. A quiet month here is a quiet month at the SEC.
What a refresh does not change
It does not restate a filed figure
A number on this site changes when the employer files something different, or when a reported error is confirmed against the filing. It does not change because a model was retuned; there is no model.
It does not fill a gap from another source
A field the filing leaves blank stays blank through every refresh. The rules that hold across refreshes are on the methodology page.
It does not move a page’s date on its own
A page states the date its own data changed, not the date the site was last deployed. A page whose filing has not moved keeps the date of that filing, which is why many pages carry a date older than the refresh above.
Corrections
A confirmed error is fixed in the next build and noted on the affected page. Report one to corrections@401kmonitor.com with the page URL and the filing you read it against. The full policy is on the contact page, and the audit the site runs against its own output is on the accuracy page.