Insider cluster buying
Companies where at least three distinct company insiders each reported an open-market PURCHASE (SEC Form 4, code P) within a rolling 30-day window. Cluster buying is disclosed Form 4 activity, not a prediction — insiders buy for many reasons.
201 companies in the covered catalog currently match this signal — insider cluster buying. Updated daily as new Form 4 filings are ingested.
| # | Company | Sector | Distinct insiders | Cluster window | Market cap |
|---|---|---|---|---|---|
| 1 | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM) | Information Technology | 31 | 2026-05-08 → 2026-06-05 | $2.15T |
| 2 | Blackstone Inc. (BX) | Financials | 3 | 2026-07-23 → 2026-08-21 | $186.0B |
| 3 | Abbott Laboratories (ABT) | Health Care | 3 | 2026-04-23 → 2026-05-07 | $171.6B |
| 4 | Pfizer (PFE) | Health Care | 3 | 2026-08-05 → 2026-08-12 | $158.6B |
| 5 | S&P Global (SPGI) | Financials | 3 | 2026-04-29 → 2026-05-01 | $119.2B |
| 6 | Ecolab (ECL) | Materials | 3 | 2026-05-13 → 2026-06-11 | $79.0B |
| 7 | Simon Property Group (SPG) | Real Estate | 11 | 2026-06-30 → 2026-06-30 | $64.6B |
| 8 | Boston Scientific (BSX) | Health Care | 4 | 2026-07-31 → 2026-08-25 | $60.9B |
| 9 | Nike, Inc. (NKE) | Consumer Discretionary | 4 | 2026-04-07 → 2026-04-13 | $51.5B |
| 10 | Autodesk (ADSK) | Information Technology | 4 | 2026-05-29 → 2026-06-23 | $48.8B |
| 11 | TKO Group Holdings (TKO) | Communication Services | 4 | 2026-05-13 → 2026-05-14 | $34.4B |
| 12 | Zoetis (ZTS) | Health Care | 3 | 2026-05-11 → 2026-05-13 | $30.2B |
| 13 | GE HealthCare (GEHC) | Health Care | 8 | 2026-04-30 → 2026-05-22 | $29.2B |
| 14 | Fiserv (FISV) | Financials | 6 | 2026-06-16 → 2026-06-17 | $24.4B |
| 15 | Arxis, Inc. (ARXS) | Industrials | 7 | 2026-04-17 → 2026-04-17 | $19.5B |
| 16 | Tractor Supply (TSCO) | Consumer Discretionary | 3 | 2026-08-03 → 2026-08-04 | $17.4B |
| 17 | Flutter Entertainment (FLUT) | Consumer Discretionary | 7 | 2026-05-08 → 2026-05-12 | $14.2B |
| 18 | Summit Therapeutics (SMMT) | Health Care | 3 | 2026-06-04 → 2026-06-12 | $13.7B |
| 19 | Charter Communications (CHTR) | Communication Services | 4 | 2026-04-28 → 2026-05-15 | $13.1B |
| 20 | GameStop (GME) | Consumer Discretionary | 5 | 2026-09-08 → 2026-10-02 | $12.8B |
| 21 | Dick's Sporting Goods (DKS) | Consumer Discretionary | 6 | 2026-08-26 → 2026-09-23 | $12.0B |
| 22 | HubSpot (HUBS) | Information Technology | 3 | 2026-05-11 → 2026-05-12 | $11.6B |
| 23 | Elanco (ELAN) | Health Care | 5 | 2026-08-07 → 2026-08-20 | $11.3B |
| 24 | On Holding AG (ONON) | Consumer Discretionary | 3 | 2026-05-14 → 2026-05-14 | $10.4B |
| 25 | Cooper Companies (The) (COO) | Health Care | 3 | 2026-09-11 → 2026-09-16 | $10.3B |
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Insider buying is disclosed SEC Form 4 activity, NOT a buy signal or a forecast of performance. Only open-market purchases (code P) count here — grants, option exercises, and tax-withholding sales are excluded.
Data: SEC EDGAR (Form 3/4/5, 10-K/10-Q filings), the U.S. House Clerk (PTR disclosures), FINRA (short interest), and market data (delayed daily-close prices & analyst consensus). Every figure carries its as-of date on the company page; a company with no data for this signal is excluded, never estimated.
Signal data as of 2026-10-08 — this page's date reflects the source's own reporting date, not when it was rendered.
Informational only — NOT financial advice. Every signal here is disclosed or delayed data, shown with its source and as-of date — not a prediction, ranking of quality, or recommendation.