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Form 8-A is the quiet filing that lets a stock list on the NYSE or Nasdaq. An engineer who built a SEC EDGAR aggregator explains what it is, how to find it, and why it is a load-bearing data signal.
Form S-1 is the registration statement domestic US companies file before an IPO. An engineer who aggregates SEC EDGAR data breaks down its structure, the risk-factors section, and how to pull it from the free SEC API.
An engineer's guide to SEC Schedule 13D and 13G beneficial ownership filings: the 5% trigger, active versus passive disclosure, the 2024 deadline overhaul, and the structured-data mandate.
An engineer's walk through the SEC Form 10-Q quarterly report: its two-part structure, filing deadlines, XBRL tagging, and how it differs from the annual 10-K.
The final prospectus is the receipt with real prices filled in. Here's what each SEC Form 424B subtype means, from an engineer building on EDGAR.
Form 13F is the SEC's quarterly window into what large institutional managers hold. An engineer building a SEC EDGAR aggregator on what 13F really contains, the 45-day lag, the missing shorts, and the 2023 dollars-not-thousands change that silently breaks datasets.