About
Tickdelta shows what changed in a company's SEC filings, and links every number to the line it came from.
It is built for private investors who read the filings themselves and want to check, not trust: what is new in this year's 10-K, who bought shares, what management promised and what it delivered, each one quoted and linked to the source.
What we do
- We compare each filing with the last one. New risk factors, a changed auditor, a restated number, a 10-K section rewritten: we show what changed, not everything again.
- We follow the people who file. Insider trades (Form 4), superinvestors (13F), activists who cross 5% (13D) and what they say they want, quoted.
- We keep the numbers honest. Fundamentals for the 532 companies we cover are computed in code from the XBRL data the companies file, and each one names its line item and filing. The metrics glossary has the formula and the XBRL tags of every number.
- We keep what changes. The archive keeps earlier versions of investor-relations pages, of our own findings and of XBRL numbers the SEC stopped serving, so a change can be checked against what was there before.
What we do not do
- No scores, ratings or predictions. We tested our own signals against the market before showing them, and none beat it (the backtest). So we show the evidence and leave the judgment to you.
- No investment advice. Nothing here says whether to buy or sell. A finding is something to read, not a verdict.
- No AI-written numbers. Every number and every finding is made by code with a fixed rule. AI answers only the questions you ask in the Ask tab, and every quote it gives is checked word for word against the filing.
- No hidden corrections. When we get something wrong, it goes in the public corrections log with what changed.
Where the data comes from
- SEC EDGAR: 10-K, 10-Q, 8-K and proxy filings, their XBRL financial data, Form 4, 13F, 13D and SEC comment letters.
- Prices: none are computed on this site for now; charts are a third-party widget.
- FINRA: short interest, twice a month.
- Companies' own pages: investor-relations pages, kept in the archive when they change.
The method behind every finding, and its limits, is on the methodology page.
How it is paid for
Tickdelta is free for everyone for now: every page, every feature, every quote and link to the filing.
Who runs it
Write to us with the contact form; if a number or a quote looks wrong, report it and it goes straight to us.