CoverageForm 410-K10-Q8-K13D13G13F

Blog

Essays and explainers from the insiderdelta team. Why we built the product, what we're learning from the data, deep dives on specific filings.
7 min read

We scored every 10-K for year-over-year language change

We scored 24,980 10-K filings for how much their Risk Factors changed year-over-year. Median similarity: 0.91. Most 10-Ks are 90%+ copy-paste from the prior year. The interesting part is the 5% of filings that aren't - and what those rewrites turn out to mean.

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4 min read

Why we built insiderdelta

Apple's FY24 revenue is $391 billion. Pull it from SEC's free XBRL API and you might get back $182 billion. Both are technically correct. Welcome to the actual state of public financial data in 2026 - and the wedge that opens for everyone building research tools on top of it.

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