Blog
Notes from the build log
Short write-ups on why Quantgress is built the way it is, and what building against primary government sources actually surfaces.
What Is a 13F Filing? What Big Investors Disclose (and Don't)
The quarterly SEC filing behind every "look what this fund just bought" headline — longs only, no shorts, no cash, and up to 135 days stale by the time it posts.
August 17, 2026Quantgress by the Numbers
9.3 million rows across 13 government-disclosure datasets, 14 of them queryable free today. A table-by-table breakdown of exactly what's in the database.
August 17, 2026What Is the STOCK Act? Congress's Insider Trading Law, Explained
The 2012 law that makes congressional stock trades public — what it requires, why no one's ever been prosecuted under it, and the 2026 bill trying to change that.
August 16, 2026The Best Free Congress Trading Tracker in 2026
Capitol Trades, Quiver Quantitative, Unusual Whales, and Quantgress all track the same public filings. What "free" actually gets you on each, and which one to use for what.
August 15, 2026Why We Built Quantgress
Quiver Quantitative and CapitolTrades sell access to data that's already public record. Here's why we scraped it ourselves instead of paying for a wrapper around a filing.
August 15, 2026Public Doesn't Mean Unrestricted: The Legal Edges of Redistributing Disclosure Data
"It's public data" turns out to be the start of the legal question, not the end of it. What FEC's statutory contributor-privacy rule and FINRA's terms of use actually restrict, and what stays clean.