A SOURCE CHECK FOR FINANCIAL RESEARCH
The number changed.
Show your sources.
Compare the same financial fact, for the exact same period, at two filing dates. See the values side by side—and follow each one back to its SEC filing.
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A value difference is a question to investigate.
It does not, by itself, prove a restatement.
THE RESEARCH DESK
Start with one fact.
1. Choose your source
Find the company's numeric CIK in SEC EDGAR. Tickers are not CIKs.
Public data is fetched through our server and cached up to one hour. No key required.
Already have an official JSON file?
Open one SEC companyconcept JSON file, up to 2 MB. Local files stay on your device. We cannot authenticate an uploaded file.
2. Lock the comparison
Each cutoff selects the latest eligible filing date. The underlying fact period stays the same.
YOUR EVIDENCE NOTE
Ready when you are.
EARLIER CUTOFF
LATER CUTOFF
Read the original filings before explaining a difference. A changed value can reflect corrections, classifications or other reporting context; this tool does not identify the cause.
WHY PERIODS MATTER
A quarter is not
a year to date.
“2025 Q3” can describe multiple facts. Revenue for July–September and revenue for January–September are different measurements. FilingLens matches the exact start date, end date and unit before comparing anything.
It also keeps same-day conflicting values unresolved. A tidy answer is only useful when the data supports it.
Learn to read your first comparison →INSIDE YOUR AI WORKFLOW
Give your agent
an evidence check.
The local MCP exposes example, period discovery and same-period comparison tools. Your assistant obtains the source data; FilingLens performs the comparison and returns accession links.
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HELP US TEST THE JOB
In the past 30 days, how often did you manually trace a financial number across two filings?
Optional. Clicking sends only the answer category.