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Insider trading, one day at a time

Every morning: the largest open-market insider purchases filed with the SEC the day before, charted. Through the week: sentiment, cluster buys, a Trader Atlas profile, seasonal windows, a chart-pattern study, the weekly recap and a stock of the week. All of it generated from the same data the members area runs on, updated through 2026-10-26.

Guides to the members tools

Guide
The Filings Browser
Type a ticker and see every insider buy and sell of the last two years marked on the price chart, with the…
Guide
Cluster buys
One insider buying can mean anything. Three insiders independently buying the same stock in the same few…
Guide
The Trader Atlas
Pick an insider. See every open-market buy they have filed, plotted against the share price on the day the…
Guide
The Backtest engine
Buy when a CFO buys at least $100k as part of a cluster, hold for a quarter. Does it work? The Backtest…
Guide
Seasonal stock patterns that survived an out-of-sample test
Every seasonality tool can show you a stock that rose every October. So can a coin, flipped often enough.…
Guide
Chart formations
Every occurrence of sixteen classic chart patterns across 8,091 US stocks and up to 32 years of history —…
Guide
Email alerts
Get one email the morning after a filing you care about lands. The alerts check the new filings and clusters…
Guide
The JSON API
The same buys, sells and clusters the members pages show, as JSON you can pull into a notebook, a sheet or…
Guide
The Formations ThinkScript study for ThinkorSwim
The full five-signal version of our ThinkorSwim study plots every formation that survived testing in both…
Guide
How to read an SEC Form 4, and which transactions actually matter
Insider filings are the most direct disclosure there is of what the people running a company are doing with…
Insider sentiment, week of Oct 19, 2026: 30% of insider filings were buys
Market-wide insider buying vs selling for the week starting Oct 19, 2026: 149 open-market buys, 349 sales, a 30% buy share against a 52-week average of 25%. Charted from SEC Form 4 filings.
Sentiment · Monday, October 26, 2026
Stock of the week: RAPP — 6 insiders bought Rapport Therapeutics, Inc. this week
Rapport Therapeutics, Inc. (RAPP) had the most distinct insider buyers of any US stock in the week to Oct 23, 2026: 6 insiders, $1.7M. Two-year record: 11 open-market buys, 5 $1M+ sales. Filings, roles and the price chart.
Stock of the week · Sunday, October 25, 2026
Insider trading this week, Oct 17, 2026 – Oct 23, 2026: 136 buys, $177.1M
Week in insider filings: 136 open-market purchases worth $177.1M across 86 companies, 68 sales of $1M+ worth $562.9M. Biggest buy: Global X Management Company, Inc. at GXVIX, $25.0M. Most buyers: RAPP (6).
Weekly recap · Saturday, October 24, 2026
Insider buying report — Friday, October 23, 2026: 28 open-market buys worth $15.7M
Every open-market insider purchase filed with the SEC on Oct 23, 2026: 28 buys worth $15.7M across 21 companies, plus 18 insider sales of $1M or more ($134.0M). Largest: Life Insurance Co Nippon at CRBG, $7.7M.
Daily report · Saturday, October 24, 2026
Does the '2 sigma above its band' chart pattern work? 1,107,662 occurrences say: repeats, negative
We measured every '2 sigma above its band' across 8,081 US stocks since 1994: 1,107,662 occurrences. Market-adjusted return over the next 21 trading days: -0.22% before 2018, -1.45% since. Verdict: repeats, negative.
Formations · Friday, October 23, 2026
Insider buying report — Thursday, October 22, 2026: 29 open-market buys worth $18.1M
Every open-market insider purchase filed with the SEC on Oct 22, 2026: 29 buys worth $18.1M across 22 companies, plus 17 insider sales of $1M or more ($66.8M). Largest: Barta Jan at DOLE, $8.6M.
Daily report · Friday, October 23, 2026
Seasonal windows opening in the next 21 days: 74 patterns that held up out of sample
74 seasonal stock patterns start between Oct 22, 2026 and Nov 12, 2026, each found on pre-2018 data and repeated in at least 75% of the years since. Strongest: Mettler Toledo International Inc/ (MTD), up in 25 of 28 years from Oct 28, 2026.
Seasonal · Thursday, October 22, 2026
Insider buying report — Wednesday, October 21, 2026: 24 open-market buys worth $38.8M
Every open-market insider purchase filed with the SEC on Oct 21, 2026: 24 buys worth $38.8M across 23 companies, plus 11 insider sales of $1M or more ($163.9M). Largest: Global X Management Company, Inc. at GXVIX, $25.0M.
Daily report · Thursday, October 22, 2026
Trader Atlas spotlight: JAB Investments S.a r.l. — 27 insider buys, 56% beat the market
JAB Investments S.a r.l.'s open-market insider purchases from SEC Form 4: 27 buys across 2 tickers since 2020, median excess return +1.3% over the next 63 trading days vs SPY, $719.6M bought in total.
Trader Atlas · Wednesday, October 21, 2026
Insider buying report — Tuesday, October 20, 2026: 25 open-market buys worth $33.3M
Every open-market insider purchase filed with the SEC on Oct 20, 2026: 25 buys worth $33.3M across 23 companies, plus 5 insider sales of $1M or more ($39.0M). Largest: Cardinale Gerald J. at SKYD, $13.7M.
Daily report · Wednesday, October 21, 2026
Cluster buys: 84 stocks where three or more insiders bought together in the last six weeks
84 insider buying clusters ended in the last 45 days. Top score: GameStop Corp. (GME), 5 buyers, $99.2M, score 100/100. Ranked list with buyer counts, dollar totals and price move since the cluster.
Cluster buys · Tuesday, October 20, 2026
Insider buying report — Monday, October 19, 2026: 30 open-market buys worth $71.2M
Every open-market insider purchase filed with the SEC on Oct 19, 2026: 30 buys worth $71.2M across 27 companies, plus 17 insider sales of $1M or more ($159.2M). Largest: Lincoln Financial Investments Corp at LNBIX, $25.0M.
Daily report · Tuesday, October 20, 2026
Insider sentiment, week of Oct 12, 2026: 26% of insider filings were buys
Market-wide insider buying vs selling for the week starting Oct 12, 2026: 134 open-market buys, 383 sales, a 26% buy share against a 52-week average of 25%. Charted from SEC Form 4 filings.
Sentiment · Monday, October 19, 2026
Stock of the week: BPRE — 3 insiders bought Bluerock Private Real Estate Fund this week
Bluerock Private Real Estate Fund (BPRE) had the most distinct insider buyers of any US stock in the week to Oct 16, 2026: 3 insiders, $5.5M. Two-year record: 13 open-market buys, 0 $1M+ sales. Filings, roles and the price chart.
Stock of the week · Sunday, October 18, 2026
Insider trading this week, Oct 10, 2026 – Oct 16, 2026: 121 buys, $357.5M
Week in insider filings: 121 open-market purchases worth $357.5M across 77 companies, 99 sales of $1M+ worth $1.47B. Biggest buy: EEME Energy SPV I, LLC at SAFX, $142.1M. Most buyers: HEI, HEI.A (8).
Weekly recap · Saturday, October 17, 2026
Insider buying report — Friday, October 16, 2026: 31 open-market buys worth $227.9M
Every open-market insider purchase filed with the SEC on Oct 16, 2026: 31 buys worth $227.9M across 26 companies, plus 24 insider sales of $1M or more ($230.9M). Largest: EEME Energy SPV I, LLC at SAFX, $142.1M.
Daily report · Saturday, October 17, 2026
Does the '2 sigma below its band' chart pattern work? 898,075 occurrences say: flipped after 2018
We measured every '2 sigma below its band' across 8,067 US stocks since 1994: 898,075 occurrences. Market-adjusted return over the next 21 trading days: +0.57% before 2018, -1.07% since. Verdict: flipped after 2018.
Formations · Friday, October 16, 2026
Insider buying report — Thursday, October 15, 2026: 27 open-market buys worth $25.0M
Every open-market insider purchase filed with the SEC on Oct 15, 2026: 27 buys worth $25.0M across 25 companies, plus 14 insider sales of $1M or more ($244.0M). Largest: Life Insurance Co Nippon at CRBG, $8.8M.
Daily report · Friday, October 16, 2026
Seasonal windows opening in the next 21 days: 54 patterns that held up out of sample
54 seasonal stock patterns start between Oct 15, 2026 and Nov 5, 2026, each found on pre-2018 data and repeated in at least 75% of the years since. Strongest: Mettler Toledo International Inc/ (MTD), up in 25 of 28 years from Oct 28, 2026.
Seasonal · Thursday, October 15, 2026
Insider buying report — Wednesday, October 14, 2026: 19 open-market buys worth $49.5M
Every open-market insider purchase filed with the SEC on Oct 14, 2026: 19 buys worth $49.5M across 19 companies, plus 34 insider sales of $1M or more ($218.6M). Largest: Goldentree Asset Management Lp at QVCG, $16.7M.
Daily report · Thursday, October 15, 2026
Trader Atlas spotlight: RA Capital Nexus Fund, L.P. — 21 insider buys, 52% beat the market
RA Capital Nexus Fund, L.P.'s open-market insider purchases from SEC Form 4: 21 buys across 9 tickers since 2020, median excess return +2.6% over the next 63 trading days vs SPY, $537.3M bought in total.
Trader Atlas · Wednesday, October 14, 2026
Insider buying report — Tuesday, October 13, 2026: 44 open-market buys worth $55.0M
Every open-market insider purchase filed with the SEC on Oct 13, 2026: 44 buys worth $55.0M across 35 companies, plus 27 insider sales of $1M or more ($776.6M). Largest: Cohen Ryan at GME, $22.8M.
Daily report · Wednesday, October 14, 2026
Cluster buys: 94 stocks where three or more insiders bought together in the last six weeks
94 insider buying clusters ended in the last 45 days. Top score: GameStop Corp. (GME), 5 buyers, $76.4M, score 100/100. Ranked list with buyer counts, dollar totals and price move since the cluster.
Cluster buys · Tuesday, October 13, 2026
Insider sentiment, week of Oct 5, 2026: 22% of insider filings were buys
Market-wide insider buying vs selling for the week starting Oct 5, 2026: 166 open-market buys, 597 sales, a 22% buy share against a 52-week average of 25%. Charted from SEC Form 4 filings.
Sentiment · Monday, October 12, 2026
Stock of the week: TSM — 30 insiders bought Taiwan Semiconductor Manufacturing Co Lt this week
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM) had the most distinct insider buyers of any US stock in the week to Oct 9, 2026: 30 insiders, $121k. Two-year record: 227 open-market buys, 1 $1M+ sales. Filings, roles and the price chart.
Stock of the week · Sunday, October 11, 2026
Insider trading this week, Oct 3, 2026 – Oct 9, 2026: 156 buys, $461.3M
Week in insider filings: 156 open-market purchases worth $461.3M across 78 companies, 132 sales of $1M+ worth $2.50B. Biggest buy: Berkshire Hathaway Inc at LEN, $192.6M. Most buyers: TSM (30).
Weekly recap · Saturday, October 10, 2026
Insider buying report — Friday, October 9, 2026: 31 open-market buys worth $106.5M
Every open-market insider purchase filed with the SEC on Oct 9, 2026: 31 buys worth $106.5M across 26 companies, plus 18 insider sales of $1M or more ($96.1M). Largest: Yin Chung-Yao at GGR, $35.1M.
Daily report · Saturday, October 10, 2026
Does the 'Death cross' chart pattern work? 49,646 occurrences say: no reliable signal
We measured every 'Death cross' across 8,057 US stocks since 1994: 49,646 occurrences. Market-adjusted return over the next 21 trading days: -0.27% before 2018, -0.68% since. Verdict: no reliable signal.
Formations · Friday, October 9, 2026
Insider buying report — Thursday, October 8, 2026: 51 open-market buys worth $45.6M
Every open-market insider purchase filed with the SEC on Oct 8, 2026: 51 buys worth $45.6M across 19 companies, plus 22 insider sales of $1M or more ($337.6M). Largest: Huang Jack Jiajia at COE, $32.3M.
Daily report · Friday, October 9, 2026
Seasonal windows opening in the next 21 days: 53 patterns that held up out of sample
53 seasonal stock patterns start between Oct 8, 2026 and Oct 29, 2026, each found on pre-2018 data and repeated in at least 75% of the years since. Strongest: Mettler Toledo International Inc/ (MTD), up in 25 of 28 years from Oct 28, 2026.
Seasonal · Thursday, October 8, 2026
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Subscribe by RSS. Built from SEC EDGAR ownership filings. Only open-market purchases (transaction code P) and sales of $1M or more are counted; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Historical description, not a prediction, and not investment advice.