Direct answers to common questions about US insider buying, each computed from public SEC Form 4 filings across the 1478 US companies Tradune tracks. Every number below is derived at build time from the same filing data — no estimates, no forecasts.
As of October 20, 2026 · trailing-90-day window · source: SEC EDGAR Form 4, public domain. Read how we measure this or the full Insider-Buying Index report.
63
63 of the 1478 US companies Tradune tracks had an insider cluster buy in the trailing-90-day window — led by Taiwan Semiconductor (TSM) with 30 distinct insider buyers.
How we measure it: Companies where two or more distinct insiders each reported an open-market purchase (Form 4 transaction code P) in the window.
As of October 20, 2026 · SEC EDGAR Form 4, public domain
14× more sells
Insiders were net sellers: across the tracked universe there were 12792 open-market sale transactions versus just 938 purchase transactions — roughly 14 sales for every buy, by Form 4 transaction count.
How we measure it: Sum of buy vs sell transactions across all scored companies (transaction count, not dollar value).
As of October 20, 2026 · SEC EDGAR Form 4, public domain
138 of 1477
138 of the 1477 companies with a complete net figure (9%) had net insider buying — the dollar value of insider purchases exceeded insider sales over the window. The other 1339 were flat or net-sold. A further 1 tracked company is excluded because at least one Form 4 in the window reported no transaction value, so the net figure cannot be stated either way.
How we measure it: Companies whose insider purchase dollars exceeded insider sale dollars over the trailing 90 days, excluding companies where any Form 4 in the window carried no disclosed value.
As of October 20, 2026 · SEC EDGAR Form 4, public domain
211 of 1478
211 of the 1478 tracked companies had at least one open-market insider purchase (Form 4 code P) in the window. Open-market buys are rarer than sells because insiders sell for many reasons but typically buy for one.
How we measure it: Companies with at least one open-market purchase (Form 4 code P) in the window. Grants, option exercises, tax withholding and gifts are excluded.
As of October 20, 2026 · SEC EDGAR Form 4, public domain
TSM · 100/100
Taiwan Semiconductor (TSM) has the highest insider-activity score at 100/100 — driven by 30 distinct buyers, officer involvement, net insider buying. The score describes filing activity; it is not a rating or a buy signal.
How we measure it: Highest 0–100 insider-activity score. See the methodology for the exact formula.
As of October 20, 2026 · SEC EDGAR Form 4, public domain
$1,380,322,194
The largest open-market insider purchase by dollar value was $1,380,322,194 of RSG by a 10% owner across 86 open-market purchases, latest on Sep 11, 2026.
How we measure it: Highest total open-market purchase value among the buy-activity leaderboard reporters; a reporter’s total may aggregate more than one purchase.
As of October 20, 2026 · SEC EDGAR Form 4, public domain
201 of 1478
201 of the 1478 tracked companies had at least one officer (CEO, CFO or other named officer) make an open-market purchase. Officer buying is watched more closely than director or 10%-owner activity because officers are closest to operations.
How we measure it: Companies where at least one of the open-market buyers was a named officer (CEO, CFO or another officer title on the filing).
As of October 20, 2026 · SEC EDGAR Form 4, public domain
The 138 tracked companies where insider purchases outweighed sales, by net dollar value. As of October 20, 2026.
| Symbol | Company | Net insider buying | Buyers | Score |
|---|---|---|---|---|
| RSG | Republic Services Inc | $1,380,322,194 | 1 | 39/100 |
| LEN | Lennar Corp | $595,294,962 | 1 | 39/100 |
| GPI | Group 1 Automotive Inc | $187,264,818 | 1 | 39/100 |
| CRBG | Corebridge Financial Inc | $150,827,659 | 1 | 39/100 |
| GME | GameStop Corp | $98,308,287 | 5 | 100/100 |
| AAT | American Assets Trust Inc | $20,059,591 | 1 | 56/100 |
| UBER | Uber Technologies Inc | $13,305,343 | 2 | 78/100 |
| AMR | Alpha Metallurgical Resources, Inc. | $12,635,232 | 2 | 78/100 |
| BABA | Alibaba Group Holding Ltd | $12,127,896 | 2 | 78/100 |
| INTC | Intel Corp | $9,999,985 | 1 | 56/100 |
| ACDC | Profrac Holding Corp | $9,753,790 | 3 | 100/100 |
| BSX | Boston Scientific Corp | $9,486,038 | 4 | 100/100 |
| ALMS | Alumis Inc | $9,317,916 | 1 | 56/100 |
| APTV | Aptiv PLC | $8,254,508 | 4 | 100/100 |
| AON | AON PLC | $5,831,938 | 1 | 56/100 |
| DKS | Dick's Sporting Goods Inc | $5,588,664 | 7 | 100/100 |
| AGO | Assured Guaranty Ltd | $5,200,000 | 1 | 39/100 |
| SAH | Sonic Automotive Inc | $4,584,694 | 1 | 39/100 |
| ENR | Energizer Holdings Inc | $3,718,956 | 1 | 39/100 |
| APLD | Applied Digital Corp | $3,645,936 | 2 | 78/100 |
| PFE | Pfizer Inc | $2,876,849 | 3 | 100/100 |
| ACI | Albertsons Companies, Inc. | $2,515,542 | 3 | 100/100 |
| WELL | Welltower Inc | $2,407,650 | 1 | 56/100 |
| CSGP | Costar Group Inc | $2,236,727 | 1 | 56/100 |
| ADC-PA | Agree Realty Corp | $2,198,799 | 1 | 56/100 |
| FBIN | Fortune Brands Innovations, Inc. | $1,984,664 | 1 | 56/100 |
| ADC | Agree Realty Corp | $1,944,072 | 3 | 100/100 |
| ABTC | American Bitcoin Corp | $1,929,607 | 1 | 56/100 |
| SGI | Somnigroup International Inc. | $1,885,314 | 1 | 56/100 |
| COO | Cooper Cos Inc | $1,880,110 | 3 | 100/100 |
| CELH | Celsius Holdings Inc | $1,830,043 | 3 | 100/100 |
| TM | Toyota Motor Corp | $1,564,850 | 1 | 56/100 |
| ABCL | Abcellera Biologics Inc | $1,545,680 | 3 | 100/100 |
| ELAN | Elanco Animal Health Inc | $1,473,069 | 5 | 100/100 |
| DFH | Dream Finders Homes Inc | $1,427,755 | 2 | 78/100 |
| HOG | Harley-Davidson Inc | $1,320,068 | 3 | 100/100 |
| MTDR | Matador Resources Co | $1,211,793 | 3 | 100/100 |
| GIII | G-III Apparel Group Ltd | $1,117,600 | 1 | 56/100 |
| VSTS | Vestis Corp | $1,045,383 | 1 | 56/100 |
| KRMN | Karman Holdings Inc | $1,036,485 | 3 | 100/100 |
| TSN | Tyson Foods Inc | $1,001,617 | 1 | 56/100 |
| IR | Ingersoll-Rand Inc | $1,000,091 | 1 | 56/100 |
| PVH | PVH Corp | $1,000,001 | 1 | 56/100 |
| HONA | Honeywell Aerospace Inc | $998,400 | 1 | 56/100 |
| IIPR | Innovative Industrial Properties Inc | $995,502 | 2 | 78/100 |
| MBGL | Mobility Global Inc | $980,566 | 1 | 56/100 |
| PSN | Parsons Corp | $959,400 | 1 | 56/100 |
| ITT | ITT Inc | $851,417 | 1 | 56/100 |
| TNC | Tennant Co | $849,240 | 3 | 100/100 |
| REZI | Resideo Technologies Inc | $848,123 | 3 | 100/100 |
| VFC | VF Corp | $787,352 | 2 | 78/100 |
| MSCI | Msci Inc | $743,660 | 1 | 56/100 |
| ALK | Alaska Air Group Inc | $738,254 | 1 | 56/100 |
| BG | Bunge Global SA | $689,050 | 1 | 56/100 |
| TSM | Taiwan Semiconductor | $683,122 | 30 | 100/100 |
| TSCO | Tractor Supply Company | $652,394 | 3 | 100/100 |
| LUMN | Lumen Technologies Inc | $612,680 | 1 | 56/100 |
| DY | Dycom Industries Inc | $551,307 | 3 | 100/100 |
| AMH | American Homes 4 Rent | $534,610 | 2 | 78/100 |
| DINO | HF Sinclair Corp | $523,648 | 1 | 56/100 |
| FISV | Fiserv Inc | $519,500 | 1 | 56/100 |
| SEI | Solaris Energy Infrastructure, Inc. | $500,994 | 1 | 56/100 |
| MFP | Midera Food Processi Inc | $491,045 | 1 | 56/100 |
| CC | Chemours Co | $488,619 | 7 | 100/100 |
| CAVA | Cava Group Inc | $482,340 | 2 | 78/100 |
| SPG | Simon Property Group Inc | $460,716 | 11 | 100/100 |
| ENOV | Enovis Corp | $449,599 | 2 | 78/100 |
| GLPI | Gaming & Leisure Properties, Inc. | $422,400 | 1 | 56/100 |
| CEG | Constellation Energy | $417,931 | 1 | 56/100 |
| NVR | NVR Inc | $405,185 | 1 | 56/100 |
| AHCO | Adapthealth Corp | $394,530 | 2 | 78/100 |
| KMPR | Kemper Corp | $367,880 | 5 | 100/100 |
| HLI | Houlihan Lokey Inc | $360,420 | 1 | 56/100 |
| DMC | Del Monte Corp | $350,858 | 1 | 56/100 |
| UTI | Universal Technical Institute Inc | $334,697 | 1 | 56/100 |
| MGY | Magnolia Oil & Gas Corp | $324,571 | 2 | 78/100 |
| MATW | Matthews Intl Corp | $318,112 | 3 | 100/100 |
| MIR | Mirion Technologies Inc | $312,000 | 1 | 56/100 |
| HWKN | Hawkins Inc | $261,576 | 2 | 78/100 |
| PLNT | Planet Fitness Inc | $253,519 | 2 | 78/100 |
| FUN | Six Flags Entertainment Corporation | $248,265 | 1 | 56/100 |
| GO | Grocery Outlet Holding Corp | $246,518 | 2 | 78/100 |
| SON | Sonoco Products Co | $234,162 | 1 | 56/100 |
| CE | Celanese Corp | $230,062 | 3 | 100/100 |
| DTM | DT Midstream Inc | $218,313 | 2 | 78/100 |
| BNL | Broadstone Net Lease Inc | $211,600 | 1 | 56/100 |
| ALTO | Alto Ingredients Inc | $207,500 | 1 | 56/100 |
| NXRT | Nexpoint Residential | $201,049 | 1 | 56/100 |
| HRL | Hormel Foods Corp | $201,000 | 1 | 56/100 |
| PODD | Insulet Corp | $162,217 | 1 | 56/100 |
| LTC | LTC Properties Inc | $153,200 | 1 | 56/100 |
| RBA | RB Global Inc | $140,942 | 2 | 78/100 |
| Q | Qnity Electronics Inc | $138,136 | 1 | 56/100 |
| EVRG | Evergy Inc | $133,611 | 1 | 56/100 |
| SAIC | Science Applications Inte | $132,500 | 1 | 56/100 |
| TFC | Truist Financial Corp | $124,868 | 1 | 56/100 |
| MRP | Millrose Properties | $115,580 | 2 | 78/100 |
| AAON | Aaon Inc | $109,584 | 2 | 78/100 |
| TMDX | Transmedics Group Inc | $109,058 | 1 | 56/100 |
| INDV | Indivior Pharmaceuticals, Inc. | $107,955 | 1 | 56/100 |
| GBCI | Glacier Bancorp Inc | $105,840 | 1 | 56/100 |
| BROS | Dutch Bros Inc | $103,120 | 1 | 56/100 |
| BMI | Badger Meter Inc | $101,572 | 1 | 56/100 |
| MO | Altria Group Inc | $101,430 | 1 | 56/100 |
| UA | Under Armour Inc | $100,181 | 1 | 56/100 |
| CMC | Commercial Metals Co | $99,969 | 1 | 56/100 |
| BXMT | Blackstone Mortgage Trust, Inc. | $96,539 | 1 | 56/100 |
| AIIR | Air Holdings Ltd | $79,982 | 2 | 78/100 |
| CBU | Community Financial System, Inc. | $75,265 | 3 | 100/100 |
| SHEN | Shenandoah Telecommunications Co | $74,280 | 2 | 78/100 |
| FTI | Technipfmc PLC | $68,871 | 1 | 56/100 |
| FIS | Fidelity National Info Serv | $57,694 | 1 | 56/100 |
| EEFT | Euronet Worldwide Inc | $55,139 | 1 | 56/100 |
| DBD | Diebold Nixdorf Inc | $50,603 | 1 | 56/100 |
| ATO | Atmos Energy Corp | $50,278 | 1 | 56/100 |
| ADTN | Adtran Holdings Inc | $50,000 | 1 | 56/100 |
| GVA | Granite Construction Inc | $49,596 | 1 | 56/100 |
| LIN | Linde PLC | $47,912 | 1 | 56/100 |
| GLXY | Galaxy Digital Inc | $44,777 | 2 | 78/100 |
| ALT | Altimmune Inc | $44,250 | 1 | 56/100 |
| MGEE | Mge Energy Inc | $42,500 | 1 | 56/100 |
| CNP | Centerpoint Energy Inc | $40,700 | 1 | 56/100 |
| ALRS | Alerus Financial Corp | $32,450 | 1 | 56/100 |
| TRST | Trustco Bank Corp Ny | $30,821 | 1 | 56/100 |
| FUL | H.B. Fuller Co. | $27,984 | 7 | 100/100 |
| NTST | Netstreit Corp | $24,144 | 1 | 56/100 |
| TPL | Texas Pacific Land Corp | $20,175 | 2 | 78/100 |
| CMS | CMS Energy Corp | $14,491 | 1 | 56/100 |
| MPT | Medical Properties Trust Inc | $9,545 | 1 | 56/100 |
| AZTA | Azenta Inc | $8,096 | 1 | 56/100 |
| IBKR | Interactive Brokers Group, Inc. | $6,675 | 1 | 56/100 |
| FG | F&G Annuities & Life Inc | $5,015 | 1 | 56/100 |
| NEOG | Neogen Corp | $4,370 | 1 | 56/100 |
| BFS | Saul Centers Inc | $3,706 | 1 | 56/100 |
| PRIM | Primoris Services Corp | $1,720 | 1 | 56/100 |
| PPG | PPG Industries Inc | $1,409 | 1 | 56/100 |
| USPH | U.S. Physical Therapy Inc | $416 | 1 | 56/100 |
| ED | Consolidated Edison Inc | $111 | 1 | 56/100 |
Figures are open-market activity from Form 4 filings, as filed; amendments (Form 4/A) may revise them.
Tradune watches SEC Form 4 filings across everything you hold and flags insider-cluster buying automatically. Free for everyone right now · no card · nothing to buy
Track insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.