Willow, the AI research agent for US stocks

Ask about any US stock. Every number links to the filing.

Willow reads the 10-K, 10-Q and 8-K, argues the bull and the bear case, and shows the exact line behind each figure.

Open the web app · Download for Mac

Your first answer is free, no card needed. Then $49 a month, cancel anytime. Willow is a research tool, not financial advice.

Film, 45 seconds: Willow researches NVIDIA and argues both sides.

The answer is in the filing. Getting it out is the hard part.

Companies tell you almost everything in their 10-K, 10-Q and 8-K. Most research stalls between the question and the page that answers it.

How it goes today

• You read it yourself. A 10-K often runs past a hundred pages. Finding one number, and making sure it is the right one, can take an evening.
• You ask a general chatbot. The answer comes back fast and sounds sure. It rarely says where a number came from, so you cannot tell when it is out of date.
• You pay for a terminal. A professional terminal costs thousands a year. It lists every filing the moment it lands, then leaves the reading to you.

With Willow: Ask in plain words. Get an answer you can check.

Willow opens the filing, finds the figure and checks it against the page before you see it. Every number links to the line it came from, so you read only the part that matters.

• Reads the 10-K, 10-Q and 8-K for you
• Shows the exact line behind each figure
• Gives you the case for and against, then leaves the call to you

Example: NVIDIA's gross margin fell to 71.1% from 75.0% the year before, while revenue grew to $215.9B, from the Form 10-K filed 2026-02-25. Open on SEC EDGAR

$49 a month. One plan covers the web app and the Mac app.

Start on your phone. Finish on your Mac.

One chat follows you to every screen, with its sources attached.

1. Ask from your phone. Type a question in your phone's browser, the way you would text it. There is nothing to install.
2. Willow reads the filings. It opens each company's 10-K on SEC EDGAR and ties every figure to the line it came from.
3. Pick it up on your Mac. The same chat waits in the Mac app and in any browser. ⌘⇧Space asks from anywhere, and a watch hit or a stock move arrives as a Mac notification.

Web app or Mac app? Both open the same account and the same chats.

Web app. The whole product in a browser tab. Start here if you are not sure.

• Nothing to install. Works in any modern browser, on any computer.
• Works on your phone too, so you can ask on the way and read later.
• Your chats, watchlist and alerts are the same everywhere you sign in.

Mac app. Everything in the web app, plus what a browser tab cannot do.

• Press ⌘⇧Space in any app and Willow opens, ready for your question.
• A Mac notification when a watch finds a new filing or a stock you follow moves more than usual, and a count on the Dock icon. They come while the window is closed.
• Widgets on your desktop and in Notification Center show your watchlist with what is new on each company, and open Willow in one click. macOS 14 or later.
• Sits in your menu bar with what changed and who reports next, and can open at login.

One download for any Mac, new or older. It keeps itself up to date. Everything the Mac app does

How a question gets answered

1. Ask about a company. Type a ticker, a metric or a plain question, the way you would ask a colleague.
2. Willow does the reading. Filings, numbers and news. Each figure is checked against its source before you see it.
3. You make the call. You get the case for and against, each point linked to its filing. Whether to buy or sell stays your call.

Your research desk, at work

Six jobs Willow does for you. Each panel replays an example.

Click any number to see where it came from.

Willow reads the 10-K, 10-Q and 8-K itself. Each figure links to the filing it came from, and growth rates and margins are worked out in code, so the AI never guesses a number.

• A source on every figure
• The math, shown
• One click to the filing on SEC EDGAR

Example: NVIDIA FY26 revenue $215.9B, gross margin 71.1% ($153.53B gross profit ÷ $215.94B revenue), from the Form 10-K filed 2026-02-25. Open on SEC EDGAR

Questions too big for one answer. (Coming next)

Ask about several companies, years or filings and Willow offers a plan. Start it, and each step runs in the background while you keep working. One cited write-up lands in the chat.

• A plan you read before it starts
• Steps run while you keep chatting
• One write-up, every figure cited

Tell it what to watch for.

Leave a standing question on a company. Willow reads each new filing against it and flags only a match, with the exact quote and the filing link.

• Up to 10 watches on one seat
• Reads 8-K, Form 4, 13D/G, 10-Q and 10-K text
• A match keeps the quote it rests on

Where did the return come from?

Put stocks side by side with the S&P 500. Willow splits each price change into what earnings did and what the multiple did, using filed earnings per share, and shows the worst fall and how long it took to recover.

• Earnings growth, from filed EPS
• Multiple change, from the price
• The same window for both

Is this move real?

A stock drops 4% and the headlines get loud. Willow sets the session against the stock’s usual day and lists what was filed that day.

• One session against its usual day
• The usual range, shaded in
• The day’s filings beside it

Use it where you already work.

One seat covers the web app, Claude and Cursor over MCP, and a REST API. Wherever you ask, the answer cites the same filings.

• Ask in the browser
• Eight SEC tools inside Claude or Cursor
• Research runs over REST with your API key

Ask it like an analyst would

Pick one to start. Your question waits for you after sign-up.

• Filings: What did NVIDIA file since I last looked? · What changed in Apple’s risk factors since last year? · What did Amphenol’s latest 8-K say? · Where does Tesla’s 10-K talk about pricing pressure? · Map Eaton’s suppliers and customers from its 10-K
• Numbers: How did Microsoft’s operating margin move over 12 quarters? · Compare Broadcom and Marvell revenue growth · Is NVIDIA’s free cash flow keeping up with earnings? · What share of NVIDIA’s revenue comes from data center? · How has Costco’s share count changed over five years?
• Owners: Who bought or sold CrowdStrike shares in the last 90 days? · Who holds more than 5% of Eaton? · Did any Meta insiders sell after the last earnings?
• Both sides: Argue both sides of AMD’s data-center story · Make the bear case for Palantir from its filings · Bull and bear on Netflix’s ad tier
• Moves: Was today’s Tesla move real or just noise? · What did Apple’s stock do after its last five earnings? · How has NVIDIA done against the S&P 500 this year?
• Watch: Tell me when Tesla says anything about pricing · Alert me when NVIDIA moves more than usual · Send me a weekly brief on my watchlist

Where every answer comes from

Willow reads the same primary sources an analyst would, then shows you the line it used. Pick a question to see what it opens.

• What changed in Apple’s risk factors since last year? Opens this year’s and last year’s 10-K and compares the risk-factor sections side by side.
• How did Microsoft’s operating margin move over 12 quarters? Pulls 12 quarters of filed income statements and works the margin out in code, not from memory.
• Who bought or sold CrowdStrike shares in the last 90 days? Reads every Form 4 from the last 90 days, notes pre-planned sales, and lists holders above 5%.
• Was today’s Tesla move real or just noise? Sets the move against the stock’s usual day over the last 60 sessions and lists what was filed that day.

• 12 quarters and 8 years of filed statements, plus the trailing twelve months
• 90 days of insider trades, each linked to its Form 4
• 8 SEC tools in Claude, Cursor or any MCP client
• One seat covers the web app, the Mac app, MCP and the API

The whole research desk, one flat price

One seat, paid on your own card. You can sign up without talking to anyone, and nothing is charged per brief. The seat covers the web app, MCP and the API, with a daily fair-use limit.

Cancel anytime · Educational research, never financial advice. What each one does

Questions, answered

Why pay for this when I can use ChatGPT or Claude?

You can, and they write well. The difference is what they read and what they keep. Willow reads the company's own filings, prices and news each time you ask, links every figure to where it came from, and writes the case for and against. It also remembers what was filed since you last looked.

Is this financial advice?

No. Willow is a research tool. It never tells you to buy, sell or hold a stock. Every brief ends with the same disclaimer, word for word, because that wording is the legal one.

Where does the data come from?

Public sources: SEC EDGAR filings (10-K, 10-Q, 8-K), TTM fundamentals and daily price action. Every claim in a brief links back to the source it leans on.

How accurate is the AI synthesis?

Willow is told to base every paragraph on the sources it read and never to make up a figure. Before a brief is saved, code checks that both the case for and the case against are there and that every figure matches a cited source. If either check fails, the brief is not published.

Why both bull and bear on every brief?

A one-sided take only tells you half the story, so every brief makes both cases. If Willow cannot make a believable case for the other side, that is worth knowing too: the situation may be less clear-cut than it looks.

Can I create an account now?

Yes. Willow is $49/month or $399/year. Sign up, pay, then open a company.

Still deciding? Compare it with building this yourself · Read the methodology · Field Notes

Empirical tests, not marketing claims.

• Does ChatGPT Hallucinate Stock Data? We Tested the Same NVIDIA Prompt in ChatGPT vs. Willow (Benchmark & Architecture, 2026-09-20, 5 min read)

Browse all field notes

Pick a company and see what its filings say.

Willow does the reading and links every figure to its filing, so you can check it yourself. It is research to help you think, not financial advice.

Cancel anytime. You keep the seat until the period ends.