Officers and directors have to report every trade in their company's stock on a Form 4, within two business days. Most of those filings are routine: stock awards, shares withheld for tax, sales under a plan set months earlier. The few that matter are open-market purchases, when an insider spends their own money at the market price. The hard part is finding them, and reading them correctly.
With Equibles connected to ChatGPT or Claude, you can ask for insider buying in plain English and get every trade with its date, price and filing. This guide walks through six prompts, worked through on GameStop (GME), whose CEO bought $97.2 million of stock in five weeks this autumn. Every answer below is real tool output from November 3, 2026.
Before you start
Connect the Equibles MCP server to your assistant once: ChatGPT setup or Claude setup. After that, the assistant picks the right tool on its own; you never type a tool name.
1. Where are insiders buying?
Which stocks above a $1 billion market cap have three or more insiders buying in the last 90 days? Skip anything trading less than $5 million a day.
The assistant calls GetInsiderSentimentScores with the cluster-buy filter. It scores 2,060 stocks from 0 to 100 on how many insiders are net buyers, how many shares they bought as a share of the company, and how much they spent, counting only open-market trades by officers and directors and leaving out trades under pre-arranged Rule 10b5-1 plans:
- 47 stocks passed the filters.
- GameStop ranked 7th of 2,060 with a score of 98: five insiders bought and one sold, for net purchases of $99.0 million, or 0.84% of the shares outstanding.
The full ranking is on the insider sentiment page (INSIDER-SENTIMENT). A high score says insiders are buying; it doesn't say why, so the next step is to read the trades.
2. Who bought, and at what price?
Show me GameStop's insider purchases since August: who bought, how many shares, at what price, and how much they own now.
GetInsiderTransactions returns each Form 4 trade, newest first:
- Ryan Cohen, the CEO and chairman, made seven open-market purchases from September 10 to October 13: 4,144,810 shares for $97.2 million, an average of $23.45 a share. His largest was 1,150,680 shares at $22.94 on September 21; his last was 777,000 shares at $27.00 on October 13.
- Four directors bought too: Lawrence Cheng 55,000 shares at $18.80 on September 8 (through an indirect holding), James Grube 10,255 shares, Alain Attal 22,500 shares over two trades, and Nat Turner 10,462 shares, his first. Together they spent about $2.0 million.
- After his last purchase Cohen held 42,492,652 shares.
The timing is worth noticing. GameStop reported its second quarter before the market opened on September 8, in an 8-K, and the first director bought that day. Insider buying often bunches up right after a report, when there is the least undisclosed news to trade on. Every trade is on GameStop's insider trading page.
3. Is it conviction or routine?
List every GameStop insider transaction since August, including sales, and tell me which ones were open-market trades and which were under a 10b5-1 plan.
The same tool without a type filter returns 16 trades: the 12 purchases above and four sales. Two columns sort them:
- Type. "Buy" and "Sell" mean open-market trades. Everything else (Award, Exercise, Tax Payment, Gift, Conversion) is compensation or paperwork, not a decision to buy or sell.
- 10b5-1. Three of the four sales, by Daniel Moore, the principal financial and accounting officer, and Mark Robinson, the general counsel, were marked as made under 10b5-1 plans, which are set up in advance and run on a schedule. One Moore sale on October 1, 7,297 shares, was not.
The four sales came to $870,659, against $99.2 million of purchases. That is why the score in step 1 counts five buyers and one seller: the plan sales drop out, and Moore's unplanned sale stays in.
4. How big is the buying next to what they already own?
How much of GameStop do insiders own, and how much did Ryan Cohen's stake grow this autumn?
The assistant combines GetOwnershipSummary and GetInsiderOwnership:
- GameStop's latest cover page counts 504,500,990 shares outstanding. Insiders who file Forms 3, 4 and 5 hold 8.62% of them; 13F institutions hold 31.61%.
- Cohen's 42,492,652 shares are 8.42% of the company. Before September 10 he held 38,347,842, so the five weeks of buying added 0.82 points.
- At the November 2 close of $24.19, 3.2% above his average purchase price, his stake was worth about $1.03 billion.
One thing to watch: GetInsiderOwnership ranks every insider by their last reported balance, and people who left the company years ago stay on the list with old dates. GameStop's shows former executives whose last filings date from 2020 and 2021. Check the Last Date column before you add anyone up. The holder breakdown is on GameStop's ownership page.
5. Is anyone planning to sell?
Have any GameStop insiders filed a Form 144 to sell shares recently?
An affiliate who sells restricted or control shares files a Form 144 when placing the order. GetForm144ProposedSales returns three notices since June, all from officers and all small:
- Daniel Moore, 15,480 shares on October 12, with the remark that the shares came from restricted stock units that vested in 2026.
- Mark Robinson, 3,882 shares on October 5 and 3,957 shares on July 6.
None came from Cohen or the directors who bought. A notice is not a warning on its own: in our study of 75,654 Form 144 notices, stocks did not drop after insiders filed to sell, and what a filing most reliably signalled was a rally before it. The notices are on GameStop's proposed sales page.
6. Has this insider bought before?
Show me every open-market purchase Ryan Cohen has made in GameStop stock, with dates and prices.
Filtering GetInsiderTransactions by name returns 28 purchases in six stretches:
- December 2020: 1,226,400 shares for $19.0 million, at $15.51 on average as filed.
- March 2022: 100,000 shares for $10.2 million, at $101.76 on average as filed.
- June 2023: 443,842 shares for $10.0 million, at $22.53 on average, through an indirect holding.
- April 3, 2025: 500,000 shares at $21.55.
- January 20 and 21, 2026: 1,000,000 shares for $21.4 million.
- September 10 to October 13, 2026: 4,144,810 shares for $97.2 million.
By dollars, the autumn's buying is more than four times any earlier stretch, at prices close to the ones he has paid since 2023. The 2020 and 2022 prices look odd because those trades predate GameStop's four-for-one split in July 2022: divide them by four ($3.88 and $25.44) to compare. The Owned After column is already restated onto today's share count, so balances line up across the split.
Check it against the Form 4
Every trade traces back to a filing on SEC EDGAR. Cohen's October 13 purchases are in the Form 4 with accession number 0000921895-26-002784, filed at 4:06 p.m. Eastern the same day. Its Table I shows transaction code P (an open-market purchase), 67,130 shares at $26.75 and 777,000 shares at $27.00, holdings afterwards of 41,715,652 and 42,492,652 shares, direct ownership, and the 10b5-1 box unchecked. That is the same as the tool's rows, field for field.
Do this for the one or two trades you care most about: the code, the price, the shares owned after, and the 10b5-1 box.
Put it together in one prompt
Find stocks with three or more insiders buying in the last 90 days, above a $1 billion market cap and $5 million a day of volume. For the one with the most dollars bought, list each open-market purchase with insider, role, date, shares and price; separate out 10b5-1 sales and stock awards; show the buyers' stakes as a share of the company; list any Form 144 notices; and show the biggest buyer's earlier purchases. Cite the filing for each trade.
To go further, ask which of the 47 stocks had their insiders buy right after an earnings report, or run step 6 on any executive by name. For prices from before a split, ask the assistant to restate them onto today's share count.
How to check what the assistant tells you
- Only "Buy" rows are purchases with the insider's own money. Awards, exercises and tax withholding are not buys, even when the share count goes up.
- Look at the 10b5-1 column on every sale. A plan sale was scheduled months earlier and says little about today's view.
- Don't read a big purchase as a forecast. In our study of 47,458 open-market purchases, the largest tenth of purchases by dollar value trailed the smallest tenth by 17.10 percentage points over the following year.
- Read the price next to the date. An insider buying after a fall and one buying after a rally are telling you different things, and the stock's own chart is a click away on the summary page.
- Open the Form 4 for anything you would act on, and check the code, the shares owned after and the 10b5-1 box.
The same six prompts work for any US-listed company: swap the name. Add Equibles to ChatGPT or Claude to track insider buying on your own watchlist.
This guide is for education, not investment advice. Figures are as of November 3, 2026.