Plain-language answers about 8-K, 10-Q, S-1, 13F, RegSHO and more.
How to use the app: Guide →An 8-K is a current report US-listed companies must file with the SEC within four business days of material events — mergers, executive changes, major contracts, or auditor resignations. It is the filing type most likely to move a stock price immediately.
A 10-Q is a quarterly report (three times a year, unaudited financials); a 10-K is the annual report (once a year, audited). The 10-K is more detailed and includes risk factors and the auditor's opinion.
An S-1 is a registration statement for an IPO or share offering; a 424B2 is the final prospectus with confirmed terms. For existing shareholders these are often dilution events and tend to pressure the stock price.
US institutions managing over $100M must disclose their equity holdings to the SEC each quarter. Reports appear up to 45 days after quarter-end, so they may differ from current positions. StockPulse curates 13F data for 24 major institutions including Berkshire Hathaway and ARK.
The Regulation SHO threshold list names securities with persistent settlement failures (FTDs) over five consecutive days, published daily by exchanges. Traders use it to gauge short-squeeze potential.
US regular hours are 9:30–16:00 ET, with pre-market (4:00–9:30) and after-hours (16:00–20:00) around them. Some brokers also support overnight sessions, making round-the-clock trading effectively possible.
The detected price is the stock price at the moment StockPulse spots a filing or news item. The reaction shows the price change 5, 30 and 60 minutes later and the next day — how the market actually responded to that news.
StockPulse watches the SEC real-time feed continuously, detects filings within tens of seconds of acceptance, generates AI summaries in Korean, English and Japanese, and pushes alerts for favorited tickers. When the SEC releases late-night filings in its morning batch, alerts follow the public release time.