An SEC Form 8-K is the "current report" a public company must file within four business days of a material event — earnings, M&A, executive changes, restatements, financing, and more. Quantustik’s 8-K Event Digest surfaces these across the tracked S&P 500 universe as they’re filed.
Item numbers on the filing itself say what happened: Item 2.02 (results of operations/earnings), Item 1.01 (a material definitive agreement), Item 5.02 (departure/appointment of directors or officers), Item 4.02 (a non-reliance restatement of prior financials), and dozens more. Quantustik’s digest reads those item numbers directly and groups them into coarser categories (earnings, M&A, exec change, restatement, distress, financing, restructuring, governance, agreement, disclosure) so the feed is scannable without re-deriving the category from the filing text.
Separate from the 8-K digest, Quantustik also computes a "filing language diff" for annual (10-K) and quarterly (10-Q) reports: a sentence-level comparison of a ticker’s two most recent filings that surfaces what wording was added or removed in each section, such as the Risk Factors and MD&A sections. Academic research (Cohen, Malloy & Nguyen, "Lazy Prices", Journal of Finance, 2020) found that larger year-over-year language changes in these sections have historically been return-predictive on average across large samples of filings. Quantustik surfaces the computed diff itself; it does not claim or backtest that predictive effect for any specific ticker.
Generally within four business days of the triggering event, per SEC rules — much faster than the periodic 10-K (annual) or 10-Q (quarterly) reports.
No. Event classification is derived from the filing’s own SEC item number, not re-guessed from the filing text.
A computed, sentence-level comparison of a ticker’s two most recent 10-K/10-Q filings, showing what wording was added or removed section by section — distinct from the 8-K digest, which tracks material-event disclosures rather than annual/quarterly report language.
Browse all S&P 500 tickers to see this metric applied to individual companies.
Educational research only — not investment advice.