Track what politicians, hedge funds, and corporate insiders are actually buying — the moment they're legally required to disclose it.
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Beyond the trade
How many shares are sold short on a stock, and how many days it would take short sellers to cover their position if the squeeze started today.
Yahoo Finance · 1st & 15thUpcoming and recent FDA decision dates for every public drugmaker — PDUFA dates, approvals, and rejections, before they hit the headlines.
OpenFDA · dailyGovernment awards over $10M from the DoD, NASA, DHS and more — before the market fully prices them in. Updated daily.
USASpending.gov · dailyWhat companies are spending to shape legislation — and exactly what they're lobbying for. Corporate strategy hiding in plain sight.
Senate LDA · quarterlyCross-reference a member of Congress's committee assignments against their trades, and see exactly when oversight and ownership start to overlap.
congress.gov · quarterlyWhat share of a stock's volume traded off-exchange, away from public order books — a signal institutional desks watch closely.
DailyEvery STOCK Act disclosure from all 535 members of Congress. Filed within 45 days by law. See exactly what they're buying and selling.
Required by the STOCK ActQuarterly SEC 13F filings from Buffett, Ackman, Soros, Burry and more. See where the world's sharpest money is positioned.
SEC 13F filingsStay ahead, automatically
Create alerts on any stock or any Suit — Coattail watches the filings, the prices, and the signals so you don't have to.
Get notified when a stock crosses a target — by exact price or percent move from the moment you set it. Works on a single stock or an entire portfolio at once.
Above, below, or bothKnow the moment any Suit — or just the ones you follow — buys or sells a stock you're watching. Filter to buys only, sells only, or everything.
Per stock or portfolioChoose which signals matter — Short Interest, FDA decisions, federal contracts, lobbying, Committee Watch — and get pinged the moment a new one posts.
Pick your signalsFollow one investor's every move. Get notified the instant they file a new disclosure — buys, sells, or both.
Per investorTwo ways in
Start from a ticker and see who's trading it — or start from an investor and see everything they've ever disclosed.
Browse by category — Tech & AI, Quantum, Medical, ETFs, Energy, Finance, Defense — or search any ticker directly.
Browse politicians, hedge funds, and insiders — ranked by Coattail Score — or jump straight to who's been active lately.
Build your shortlist
Add anything to your Watchlist in one tap. It becomes the home base for live prices, new disclosures, and who's buying what.
Real-time quotes for every stock on your list, refreshed continuously while you browse.
See which Suits are buying or selling the same stocks you're watching, right alongside the price.
Follow a Suit and watch their win rate, returns, and trade frequency build over time.
Every trade on Coattail was filed directly with a government regulatory body by the person legally required to disclose it. We don't curate, estimate, or manually track anyone. We read public record — and make it legible.
See our data sources →Free to download. No subscription required to get started.
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