Executives, directors and large owners must report trades in their own company's shares within two business days. Insiders sell for many reasons, but they buy for one: several of them buying at once is one of the stronger signals in public data.
After 2,032 cluster buys since 2023, the shares on average moved:
3 months later
+8.1%
6 months later
+15.0%
12 months later
+26.5%
A plain average of every cluster buy (three or more insiders in a month), not adjusted for the market, and only for companies still listed today.
Trades up to Sep 30, 2026, most recent first. Dots mark the trades; bigger dots, bigger trades.
Open-market purchases of $25K or more filed in the last 30 days, newest filings first.
| Company | Insider | Trade date | Price | Value |
|---|---|---|---|---|
| len | Warren E. Buffett (10% owner) | Sep 30, 2026 | $81.59 | $52.12M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $72.39 | $20.20M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $89.86 | $17.67M |
| kod | Julian Baker (Director) | Sep 28, 2026 | $83.95 | $10.40M |
| adrx | Carl L. Gordon (Director) | Sep 28, 2026 | $17.00 | $10.00M |
| adrx | Genesis GP LLC OrbiMed (Director) | Sep 28, 2026 | $17.00 | $10.00M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $88.65 | $9.55M |
| kod | Julian Baker (Director) | Sep 28, 2026 | $84.85 | $9.32M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $88.57 | $8.73M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $243.23 | $8.41M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $242.27 | $8.35M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $89.60 | $7.41M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 29, 2026 | $240.87 | $6.93M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $87.51 | $6.58M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $73.08 | $5.75M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $73.97 | $5.68M |
| kod | 667, L.P. (Director) | Sep 28, 2026 | $86.94 | $5.52M |
| adrx | Carl L. Gordon (Director) | Sep 28, 2026 | $17.00 | $5.10M |
| adrx | Genesis GP LLC OrbiMed (Director) | Sep 28, 2026 | $17.00 | $5.10M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $245.54 | $4.73M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $76.35 | $4.71M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 30, 2026 | $243.42 | $4.02M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 30, 2026 | $244.61 | $4.00M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $78.57 | $3.91M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $244.13 | $3.77M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $77.43 | $3.74M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 30, 2026 | $239.37 | $3.52M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 29, 2026 | $239.52 | $3.49M |
| kod | Julian Baker (Director) | Sep 28, 2026 | $85.97 | $3.35M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 29, 2026 | $236.48 | $3.06M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $239.50 | $3.01M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 30, 2026 | $240.31 | $2.97M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $61.63 | $2.75M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $68.96 | $2.69M |
| kod | Bros. Advisors (GP) LLC Baker (Director) | Sep 28, 2026 | $75.52 | $2.44M |
| kod | Julian Baker (Director) | Sep 28, 2026 | $81.82 | $2.29M |
| bpre | Ramin Kamfar (Director) | Sep 30, 2026 | $12.61 | $1.94M |
| gpi | Conifer Management, L.L.C. (10% owner) | Sep 28, 2026 | $247.40 | $1.92M |
| kbdc | James L. Robo (Director) | Sep 28, 2026 | $13.03 | $1.91M |
| bpre | Ramin Kamfar (Director) | Sep 29, 2026 | $12.60 | $1.71M |
Schedule 13D: someone owns over 5% and may push for change.
Form 144 notices from the last two weeks: shares an insider intends to sell.
$368.67M, 0.03% of shares, filed Oct 15, 2026
$347.25M, 0.03% of shares, filed Oct 7, 2026
$201.40M, 0.06% of shares, filed Oct 13, 2026
$191.04M, 1.90% of shares, filed Oct 13, 2026
$121.41M, 0.21% of shares, filed Oct 5, 2026
$111.10M, 2.43% of shares, filed Oct 13, 2026
$106.78M, 0.09% of shares, filed Oct 5, 2026
$97.64M, 0.04% of shares, filed Oct 6, 2026
$78.65M, 1.20% of shares, filed Oct 14, 2026
$68.24M, 4.23% of shares, filed Oct 6, 2026
$64.50M, 0.98% of shares, filed Oct 14, 2026
$53.21M, 2.29% of shares, filed Oct 16, 2026
$42.28M, 0.05% of shares, filed Oct 5, 2026
$41.03M, 1.04% of shares, filed Oct 9, 2026
$40.31M, 0.10% of shares, filed Oct 16, 2026
From SEC Form 4 (transaction codes P and S, common stock only). Awards, option exercises, gifts and tax withholding are left out, as are trades whose reported price is far from that day's market price. Not investment advice.