Five tools that track congressional stock trades. What each one actually does.
Every tool on this list pulls data from the same source: the Periodic Transaction Reports that members of Congress are required to file under the STOCK Act within 45 days of a trade. What separates them is not the data. It is what they do with it.
45 days
maximum window under the STOCK Act for a member to disclose a trade — meaning every tool on this list is working with the same legally mandated delay
535
members of Congress required to file disclosures — 100 senators and 435 representatives, though not all trade, and not all file on time
$200
the maximum fine for a late STOCK Act disclosure, which explains why late filings are common and why disclosure dates and trade dates often diverge significantly
$1,000
the minimum trade size that triggers a disclosure requirement — smaller trades, diversified mutual funds, and many retirement accounts are entirely exempt
What to look for before picking a tool
Because every tracker draws from the same underlying government portals, the raw data is identical across all of them. A trade filed by Senator X for Company Y on a given date appears in every database at roughly the same time. The differentiation happens entirely in the layer above the data: how quickly the tool processes new filings, whether it adds any analytical context, whether it tells you which committee the member sits on, and whether it filters out the noise so you can focus on the trades that actually carry signal.
There are four questions worth answering before choosing a tracker. First, are you a casual investor looking for high-signal curated trades, or are you a researcher who wants everything? Second, do you need committee context to interpret whether a trade is significant, or do you already know which members sit on which committees? Third, are you willing to pay for a better product, or do you need a free option? Fourth, do you need API access or the ability to backtest trading strategies built around congressional data?
The tools below are categorized by what they are actually built for. None of them is right for everyone. The best tracker for a data scientist building quantitative strategies is not the best tracker for someone who wants to spend ten minutes a week reviewing the most significant recent disclosures.
The five tools, ranked by use case
Kapitol.ai
Best for: investors who want signal, not noise
Kapitol.ai is the only tool on this list built around the premise that most congressional trades do not matter and the ones that do require human curation to identify. Every trade in the Kapitol feed has been reviewed by a human analyst, scored for insider significance based on committee membership and legislative context, and annotated with a written context story explaining who the politician is, what the company does, and why the timing of the trade is or is not significant.
The practical difference is immediately visible. A disclosure showing that a member of the Senate Armed Services Committee purchased Northrop Grumman during a closed-door defense appropriations markup looks very different from the same member purchasing an S&P 500 index fund. Both appear in a raw data feed as the same type of record. Only in a curated feed does the committee tie surface next to the trade, with a note explaining the specific legislative moment and what it means for the investor.
The platform also tracks open and closed positions, current P&L on every published trade, and sends email notifications to subscribers when new trades are published. The feed is deliberately narrow by design: it shows the trades that cleared the curation filter, not every filing that comes in. For investors who want to spend minutes rather than hours reviewing congressional disclosures each week, that selectivity is the product.
Strengths
- +Human-curated feed filters out low-signal trades
- +Full committee context annotated on every trade
- +Written context story explains why the trade matters
- +Live P&L tracking on open positions
- +Email alerts when curated trades are published
Limitations
- -Not a complete feed — curated trades only, not every disclosure
- -No raw API access or backtesting tools
- -Paid product with no permanent free tier
Capitol Trades
Best for: free, clean raw data with good filtering
Capitol Trades, launched August 2, 2021 by 2iQ Research, is the most polished free option in the market. The interface is clean, beginner-friendly, and well-designed for browsing disclosures without needing to understand the underlying government portals. It tracks approximately 200 politicians with financial disclosures, covers stocks, ETFs, mutual funds, options, crypto, and bonds, and has logged over $2.3 billion in trading volume across its database.
The filtering system is one of its strongest features for a free tool: you can filter by chamber, party, committee, state, asset type, transaction type, trade size, sector, and issuer country. The heatmap visualization showing trading activity concentration by state is a useful quick-reference tool that no other platform on this list offers. Capitol Trades has been cited by the Wall Street Journal and the New York Times as a data source, which speaks to the reliability of its underlying data pipeline.
The core limitation is the same one that applies to all raw-data tools: Capitol Trades shows you the trade but not what it means. There is no committee context layered onto individual disclosures, no explanation of whether a specific trade timing is noteworthy given active legislation, and no insider significance scoring. Historical coverage goes back three years. For a free tool it is excellent. As a standalone intelligence product it stops at the data layer.
Strengths
- +Completely free, no account required to browse
- +Clean, well-designed interface
- +Extensive filtering across all disclosure fields
- +$2.3B+ in trading volume tracked across database
- +Cited by WSJ and New York Times
Limitations
- -No context or analysis on individual trades
- -No committee membership data overlaid on trades
- -Only 3 years of historical data
- -No API access or programmatic data export
Unusual Whales
Best for: options traders who want congress data as one component of a broader platform
Unusual Whales was founded in 2020 as an options flow analysis platform, and that remains its primary product. The congressional trading section was added as an extension of the platform's broader theme of tracking what the most informed participants in the market are doing. It is a well-executed addition: trades are processed within 24 to 48 hours of appearing in the official government portals, which is faster than most competitors, and the politics section allows filtering by politician or ticker with clean visual output.
The platform gained significant attention in 2021 when its annual Congressional Trading Report was cited by Bloomberg, ABC News, and Reuters, and directly prompted six new STOCK Act reform bills to be introduced within six days. That report documented the breadth of congressional trading in granular terms that the public had not previously seen in accessible form. Unusual Whales also launched two ETFs through Subversive Capital in February 2023: the NANC ETF, which passively mirrors Democratic congressional trades, and the KRUZ ETF, which mirrors Republican congressional trades.
For someone whose primary interest is congress tracking rather than options flow, the pricing is the main friction point. The full platform costs roughly $50 to $99 per month, and congressional trade alerts are bundled into a product built substantially around options data that most long-only investors do not need. If you want the congressional tracking features specifically, you are paying for a significant amount of platform you will not use. Our separate review of the NANC ETF covers the structural problems with passive congressional trade replication in more detail.
Strengths
- +24-48 hour processing from official portals, fastest in the market
- +Annual Congressional Trading Reports with broad data coverage
- +NANC and KRUZ ETF products for passive index exposure
- +Strong brand recognition and media coverage history
Limitations
- -Congress tracking is secondary to options flow — not the core product
- -Expensive if you only want congressional data
- -No committee context or insider significance scoring on trades
- -Raw data feed with no curation layer
Quiver Quantitative
Best for: data scientists, developers, and quantitative researchers
Quiver Quantitative was founded in February 2020 by James and Christopher Kardatzke, twin brothers who built the initial product while still in college. It is the most data-complete tool on this list and the only one that provides both a consumer web interface and a full programmatic API. The congress trading section covers over 1,800 U.S. equities with data going back to January 2016, making it by far the deepest historical archive available in a consumer product. Quiver has been cited as a data source by CNBC, Bloomberg, the Washington Post, the Financial Times, the BBC, and Reuters.
The premium plan at $25 per month or $300 per year unlocks the platform's most distinctive features: a congress trading backtester that lets you simulate historical strategies built around congressional disclosures, a stock screener filtered by congressional activity, and politician portfolio tracking with leaderboards. For a researcher who wants to test whether a strategy of mirroring trades by Armed Services Committee members outperforms a broader congressional basket historically, Quiver is the only platform that makes that analysis straightforward. The API has its own separate pricing, starting at $10 per month for the Hobbyist tier and $75 per month for the Trader tier.
The free tier is genuinely functional: it provides live access to congressional trading data, government contracts, lobbying data, and social trends. The limitation is that the free tier reflects Quiver's primary positioning as a data infrastructure product, not a consumer intelligence product. The interface is designed for people who know what they are looking for, not for investors who want the platform to tell them which trades matter.
Strengths
- +Historical data back to January 2016, deepest archive available
- +Full API access for programmatic data retrieval
- +Congress trading backtester for strategy validation
- +Functional free tier with live congress data
- +iOS and Android mobile apps
Limitations
- -Not designed for casual investors — data-first interface
- -No committee context or significance scoring on trades
- -API pricing is separate from web platform pricing
- -Raw data without editorial curation or analysis
House Stock Watcher + Senate Stock Watcher
Best for: technically-minded users who want raw government data in a readable format, free
House Stock Watcher (housestockwatcher.com) and Senate Stock Watcher (senatestockwatcher.com) are both single-developer projects built by Timothy Carambat. Senate Stock Watcher launched in March 2020 and was built in approximately six hours as a lightweight wrapper around the government's own disclosure portals. House Stock Watcher followed. Both tools update daily and provide email or notification alerts when new filings are uploaded.
The design is deliberately minimal. There is no visualization layer, no filtering system comparable to Capitol Trades, and no analytical output of any kind. What you get is the raw filing data rendered into a readable format, separated by chamber, with a basic search function. The underlying data is published to a public GitHub repository, meaning that developers who want to build their own analysis can pull the structured JSON directly rather than scraping the government portals themselves.
As a one-person project, both tools carry the usual sustainability question: there is no corporate entity or subscription revenue to guarantee long-term maintenance. For users who primarily want a notification when a new filing is posted and are comfortable doing their own research on what the filing means, these tools serve that narrow function well. For any use case that requires systematic analysis or consistent data coverage, the limitations of a free single-developer project apply.
Strengths
- +Completely free, no account required
- +Public GitHub data repository for developers
- +Daily updates with notification alerts on new filings
- +Separate House and Senate interfaces
Limitations
- -Minimal features — no filtering, no visualization
- -Single-developer project, no institutional maintenance
- -No context, analysis, or committee data
- -Effectively a notification service, not an intelligence product
Side-by-side comparison
Key features across all five tools at a glance.
| Feature | Kapitol.ai | Capitol Trades | Unusual Whales | Quiver Quant | Stock Watcher |
|---|---|---|---|---|---|
| Pricing | $35/mo | Free | ~$50-99/mo | Free / $25/mo | Free |
| Human curation | Yes | No | No | No | No |
| Committee context | Yes | No | No | No | No |
| Context story per trade | Yes | No | No | No | No |
| Insider score | Yes | No | No | No | No |
| Email alerts | Yes | Newsletter | Yes | Yes | Yes |
| Live P&L tracking | Yes | No | No | No | No |
| API access | No | No | No | Yes (paid) | GitHub JSON |
| Backtesting | No | No | No | Yes | No |
| Historical data | Curated | 3 years | 2021+ | 2016+ | 2020+ |
| Primary focus | Congress intelligence | Congress data | Options flow | Data infrastructure | Filing notifications |
Frequently asked questions
Yes. Every tool on this list ultimately draws from the same source: the Periodic Transaction Reports filed through the House Financial Disclosures portal (disclosures-clerk.house.gov) and the Senate Financial Disclosures portal (efts.senate.gov). These are the official government systems that members of Congress are required to use under the STOCK Act. No private company has access to trade information earlier than these portals publish it, and no tool can eliminate the 45-day maximum disclosure window built into the law. The difference between tools is entirely in how quickly they process new filings and what analytical layer, if any, they add on top of the raw data.
The STOCK Act gives members up to 45 days from the date of the trade to file their disclosure. In practice, many members file closer to the deadline, and some file late. Once filed, the government portals process and publish the disclosure within a day or two. Commercial trackers then parse and display it, adding another 24 to 48 hours in most cases. The realistic window from trade execution to public visibility is anywhere from a few days (for members who file promptly) to eight or nine weeks (for members who file at the deadline). No tool can close this structural delay because it is written into the law. Learn more about how congressional disclosures work and what the 45-day window means in practice.
A member's committee assignment determines what legislative and regulatory information they have access to before it becomes public. A senator on the Armed Services Committee participates in closed briefings on defense contracts, classified weapons programs, and procurement decisions before any public announcement. A member on the House Financial Services Committee sees draft crypto legislation before it is published. A member on the Senate HELP Committee reviews drug approval discussions before the FDA makes them public. When that member buys or sells stock in a company directly affected by decisions they are participating in, the committee tie is the most important contextual factor for understanding whether the trade carries unusual information. Raw data feeds show the trade. Only a curated platform shows the committee tie next to it. Read more in our full breakdown of committee conflicts of interest.
It depends on what you need. If you are a researcher, data scientist, or developer who wants complete raw data and the ability to build your own analysis, the free tiers of Capitol Trades or Quiver Quantitative are excellent starting points, and Quiver's paid plan adds backtesting capabilities that are genuinely useful for quantitative work. If you are a long-only investor who wants to know which congressional trades are actually worth paying attention to this week, and why, a curated product saves a significant amount of time. The free tools give you all the filings. They do not tell you which ones matter.
The Stop Trading on Congressional Knowledge Act, known as the STOCK Act, was signed into law in April 2012. It prohibits members of Congress and their staff from trading on material non-public information obtained through their official positions, and it requires disclosure of any trade exceeding $1,000 in value within 45 days of the transaction. The disclosure requirement is what makes all of these tracking tools possible: before the STOCK Act, members were not required to disclose individual trades on this timeline. The law has significant gaps, including the 45-day delay, the $200 late-filing penalty, and the absence of any requirement to recuse from legislation affecting personal holdings. These STOCK Act loopholes are why committee context matters so much when evaluating individual trades.
Every tool shows you what Congress traded. Kapitol.ai shows you which trades actually mean something.
The raw data is free. What takes time is figuring out whether a member's purchase matters — which committee they sit on, what legislation was moving when they bought, how the timing lines up. Kapitol.ai does that work before the trade appears in your feed. Every trade is curated, scored, and annotated with the committee context that turns a filing into a signal.