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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.
Insider buying report — Wednesday, October 7, 2026: 18 open-market buys worth $11.3M
Every open-market insider purchase filed with the SEC on Oct 7, 2026: 18 buys worth $11.3M across 14 companies, plus 30 insider sales of $1M or more ($235.9M). Largest: Troim Tor Olav at BORR, $6.4M.
Daily report · Thursday, October 8, 2026
Trader Atlas spotlight: 667, L.P. — 47 insider buys, 64% beat the market
667, L.P.'s open-market insider purchases from SEC Form 4: 47 buys across 12 tickers since 2019, median excess return +8.1% over the next 63 trading days vs SPY, $1.47B bought in total.
Trader Atlas · Wednesday, October 7, 2026
Insider buying report — Tuesday, October 6, 2026: 17 open-market buys worth $45.0M
Every open-market insider purchase filed with the SEC on Oct 6, 2026: 17 buys worth $45.0M across 16 companies, plus 14 insider sales of $1M or more ($1.01B). Largest: Ryan Israel at PSUS, $9.6M.
Daily report · Wednesday, October 7, 2026
Cluster buys: 102 stocks where three or more insiders bought together in the last six weeks
102 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 6, 2026
Insider buying report — Monday, October 5, 2026: 39 open-market buys worth $252.8M
Every open-market insider purchase filed with the SEC on Oct 5, 2026: 39 buys worth $252.8M across 31 companies, plus 48 insider sales of $1M or more ($821.5M). Largest: Berkshire Hathaway Inc at LEN, $192.6M.
Daily report · Tuesday, October 6, 2026
Insider sentiment, week of Sep 28, 2026: 38% of insider filings were buys
Market-wide insider buying vs selling for the week starting Sep 28, 2026: 264 open-market buys, 422 sales, a 38% buy share against a 52-week average of 25%. Charted from SEC Form 4 filings.
Sentiment · Monday, October 5, 2026
Stock of the week: SPG — 11 insiders bought Simon Property Group Inc. this week
SIMON PROPERTY GROUP INC. (SPG) had the most distinct insider buyers of any US stock in the week to Oct 2, 2026: 11 insiders, $461k. Two-year record: 98 open-market buys, 1 $1M+ sales. Filings, roles and the price chart.
Stock of the week · Sunday, October 4, 2026
Insider trading this week, Sep 26, 2026 – Oct 2, 2026: 240 buys, $577.1M
Week in insider filings: 240 open-market purchases worth $577.1M across 133 companies, 121 sales of $1M+ worth $1.18B. Biggest buy: Conifer Management, L.L.C. at GPI, $66.3M. Most buyers: SPG (11).
Weekly recap · Saturday, October 3, 2026
Insider buying report — Friday, October 2, 2026: 41 open-market buys worth $49.0M
Every open-market insider purchase filed with the SEC on Oct 2, 2026: 41 buys worth $49.0M across 31 companies, plus 44 insider sales of $1M or more ($244.0M). Largest: Cohen Ryan at GME, $17.1M.
Daily report · Saturday, October 3, 2026
Does the 'Golden cross' chart pattern work? 47,655 occurrences say: no reliable signal
We measured every 'Golden cross' across 8,043 US stocks since 1994: 47,655 occurrences. Market-adjusted return over the next 21 trading days: -0.08% before 2018, -1.21% since. Verdict: no reliable signal.
Formations · Friday, October 2, 2026
Insider buying report — Thursday, October 1, 2026: 64 open-market buys worth $31.6M
Every open-market insider purchase filed with the SEC on Oct 1, 2026: 64 buys worth $31.6M across 43 companies, plus 20 insider sales of $1M or more ($159.5M). Largest: Life Insurance Co Nippon at CRBG, $7.3M.
Daily report · Friday, October 2, 2026
Seasonal windows opening in the next 21 days: 17 patterns that held up out of sample
17 seasonal stock patterns start between Oct 1, 2026 and Oct 22, 2026, each found on pre-2018 data and repeated in at least 75% of the years since. Strongest: Mitek Systems Inc (MITK), up in 28 of 34 years from Sep 8, 2026.
Seasonal · Thursday, October 1, 2026
Insider buying report — Wednesday, September 30, 2026: 55 open-market buys worth $353.9M
Every open-market insider purchase filed with the SEC on Sep 30, 2026: 55 buys worth $353.9M across 41 companies, plus 21 insider sales of $1M or more ($231.0M). Largest: Conifer Management, L.L.C. at GPI, $66.3M.
Daily report · Thursday, October 1, 2026
Trader Atlas spotlight: Baker Bros. Advisors (GP) LLC — 55 insider buys, 66% beat the market
Baker Bros. Advisors (GP) LLC's open-market insider purchases from SEC Form 4: 55 buys across 16 tickers since 2019, median excess return +9.4% over the next 63 trading days vs SPY, $1.51B bought in total.
Trader Atlas · Wednesday, September 30, 2026
Insider buying report — Tuesday, September 29, 2026: 36 open-market buys worth $93.0M
Every open-market insider purchase filed with the SEC on Sep 29, 2026: 36 buys worth $93.0M across 32 companies, plus 17 insider sales of $1M or more ($161.0M). Largest: George Simeon at ADRX, $27.2M.
Daily report · Wednesday, September 30, 2026
Cluster buys: 99 stocks where three or more insiders bought together in the last six weeks
99 insider buying clusters ended in the last 45 days. Top score: Cardinal Infrastructure Group Inc. (CDNL), 7 buyers, $8.5M, score 93/100. Ranked list with buyer counts, dollar totals and price move since the cluster.
Cluster buys · Tuesday, September 29, 2026
Insider buying report — Monday, September 28, 2026: 44 open-market buys worth $49.6M
Every open-market insider purchase filed with the SEC on Sep 28, 2026: 44 buys worth $49.6M across 36 companies, plus 19 insider sales of $1M or more ($384.5M). Largest: Conifer Management, L.L.C. at GPI, $31.5M.
Daily report · Tuesday, September 29, 2026
Insider sentiment, week of Sep 21, 2026: 33% of insider filings were buys
Market-wide insider buying vs selling for the week starting Sep 21, 2026: 227 open-market buys, 457 sales, a 33% buy share against a 52-week average of 25%. Charted from SEC Form 4 filings.
Sentiment · Monday, September 28, 2026
Stock of the week: BBD — 21 insiders bought Bank Bradesco this week
BANK BRADESCO (BBD) had the most distinct insider buyers of any US stock in the week to Sep 25, 2026: 21 insiders, $27.0M. Two-year record: 23 open-market buys, 2 $1M+ sales. Filings, roles and the price chart.
Stock of the week · Sunday, September 27, 2026
Insider trading this week, Sep 19, 2026 – Sep 25, 2026: 206 buys, $652.8M
Week in insider filings: 206 open-market purchases worth $652.8M across 134 companies, 138 sales of $1M+ worth $2.04B. Biggest buy: Berkshire Hathaway Inc at LEN, LEN.B, $212.4M. Most buyers: BBD (21).
Weekly recap · Saturday, September 26, 2026
Insider buying report — Friday, September 25, 2026: 32 open-market buys worth $154.8M
Every open-market insider purchase filed with the SEC on Sep 25, 2026: 32 buys worth $154.8M across 29 companies, plus 17 insider sales of $1M or more ($457.1M). Largest: Berkshire Hathaway Inc at LEN, $136.4M.
Daily report · Saturday, September 26, 2026
Does the 'Overbought: RSI above 70' chart pattern work? 2,606,324 occurrences say: repeats, negative
We measured every 'Overbought: RSI above 70' across 8,029 US stocks since 1994: 2,606,324 occurrences. Market-adjusted return over the next 21 trading days: -0.09% before 2018, -1.26% since. Verdict: repeats, negative.
Formations · Friday, September 25, 2026
Insider buying report — Thursday, September 24, 2026: 30 open-market buys worth $27.7M
Every open-market insider purchase filed with the SEC on Sep 24, 2026: 30 buys worth $27.7M across 26 companies, plus 23 insider sales of $1M or more ($301.9M). Largest: Life Insurance Co Nippon at CRBG, $10.2M.
Daily report · Friday, September 25, 2026
Seasonal windows opening in the next 21 days: 15 patterns that held up out of sample
15 seasonal stock patterns start between Sep 24, 2026 and Oct 15, 2026, each found on pre-2018 data and repeated in at least 75% of the years since. Strongest: Mitek Systems Inc (MITK), up in 28 of 34 years from Sep 8, 2026.
Seasonal · Thursday, September 24, 2026
Insider buying report — Wednesday, September 23, 2026: 39 open-market buys worth $75.1M
Every open-market insider purchase filed with the SEC on Sep 23, 2026: 39 buys worth $75.1M across 37 companies, plus 34 insider sales of $1M or more ($242.4M). Largest: Orbimed Advisors Llc at ETRA, $20.0M.
Daily report · Thursday, September 24, 2026
Trader Atlas spotlight: Biotechnology Value Trading Fund OS LP — 66 insider buys, 61% beat the market
Biotechnology Value Trading Fund OS LP's open-market insider purchases from SEC Form 4: 66 buys across 11 tickers since 2019, median excess return +10.3% over the next 63 trading days vs SPY, $321.3M bought in total.
Trader Atlas · Wednesday, September 23, 2026
Insider buying report — Tuesday, September 22, 2026: 60 open-market buys worth $26.2M
Every open-market insider purchase filed with the SEC on Sep 22, 2026: 60 buys worth $26.2M across 41 companies, plus 21 insider sales of $1M or more ($492.1M). Largest: Life Insurance Co Nippon at CRBG, $4.6M.
Daily report · Wednesday, September 23, 2026
Cluster buys: 110 stocks where three or more insiders bought together in the last six weeks
110 insider buying clusters ended in the last 45 days. Top score: Cardinal Infrastructure Group Inc. (CDNL), 7 buyers, $8.5M, score 93/100. Ranked list with buyer counts, dollar totals and price move since the cluster.
Cluster buys · Tuesday, September 22, 2026
Insider buying report — Monday, September 21, 2026: 45 open-market buys worth $369.0M
Every open-market insider purchase filed with the SEC on Sep 21, 2026: 45 buys worth $369.0M across 37 companies, plus 43 insider sales of $1M or more ($545.7M). Largest: Berkshire Hathaway Inc at LEN, LEN.B, $212.4M.
Daily report · Tuesday, September 22, 2026
Insider sentiment, week of Sep 14, 2026: 26% of insider filings were buys
Market-wide insider buying vs selling for the week starting Sep 14, 2026: 317 open-market buys, 902 sales, a 26% buy share against a 52-week average of 24%. Charted from SEC Form 4 filings.
Sentiment · Monday, September 21, 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.