What is a corporate-event signal (8-K)?
A corporate-event signal is a scored event derived from an SEC 8-K filing — the “current report” a public company files to disclose a material event such as an acquisition, an executive change, a delisting, or a change of auditor.
Direction depends on the 8-K item: a merger agreement or a major contract leans bullish, while a delisting notice, a going-concern doubt, or the departure of a CFO leans bearish. Each item type carries a materiality score that drives the signal’s strength.
What an 8-K covers
The 8-K is the SEC’s catch-all for material events between quarterly reports: mergers and acquisitions, bankruptcies, delistings, leadership changes, auditor changes, and results of shareholder votes. Each is tagged by item number (for example Item 5.02 for officer changes), which QuantConomy uses to classify and score the event.
Materiality, not just presence
Not every 8-K matters equally. The platform assigns a materiality score so a change-of-control or delisting outranks a routine administrative amendment, and only the most material items surface as strong signals or lead a daily digest.
Recent examples
Live corporate-event signals from the platform, newest first. Each links to the company.
| Asset | Direction | Strength | What happened | When |
|---|---|---|---|---|
| BRKHU Burtech Acquisition Corp | neutral | 70 | BRKHU filed 8-K: Other Events - 1 material event - [strong neutral signal] | 2026-07-10 |
| ATER Aterian Inc | neutral | 70 | ATER filed 8-K: Regulation FD Disclosure - 1 material event - [strong neutral signal] | 2026-07-10 |
| VIVK Vivakor Inc | bullish | 85 | VIVK filed 8-K: Material Definitive Agreement, Unregistered Sales of Equity - 2 material events - [very strong bullish signal] | 2026-07-10 |
| TNON Tenon Medical Inc | neutral | 70 | TNON filed 8-K: Other Events - 1 material event - [strong neutral signal] | 2026-07-10 |
| PHGE BiomX Inc | neutral | 70 | PHGE filed 8-K: Other Events - 1 material event - [strong neutral signal] | 2026-07-10 |
| DRIO DarioHealth Corp | neutral | 75 | DRIO filed 8-K: Director or Officer Changes - 1 material event - [strong neutral signal] | 2026-07-10 |
See these in context in the daily market digest . Market context, not advice.
Frequently asked
- How is an 8-K different from a 10-K or 10-Q?
- A 10-K is the annual report and a 10-Q the quarterly report — scheduled, comprehensive filings. An 8-K is filed on-demand, generally within four business days of a specific material event, so it is the fastest official signal of something changing at a company.
- Are all 8-K signals bearish?
- No. The direction is set by the underlying item — acquisition and major-contract 8-Ks lean bullish, while delisting, auditor-change, and going-concern 8-Ks lean bearish.
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