Biggest insider buys, week of Sep 21–27, 2026: Lennar (LEN) leads with $348.8M
Insiders reported 294 purchases of common stock across 114 companies in SEC Form 4 filings. These are the five U.S. companies with the most insider buying by dollar value.
Lennar Corporation (LEN), commonly known as Lennar, is an American home construction company based in Miami-Dade County, Florida. Wikipedia (CC BY-SA 4.0) ↗
One insider bought 4,423,229 shares in 25 transactions at an average of $78.85 a share.
- BERKSHIRE HATHAWAY INC; BUFFETT WARREN E, 10% owner: bought 1,218,429 shares at $76.39 ($93.08M) on Sep 18, 2026. Filed Sep 21, 2026. View Form 4 on SEC.gov ↗
- BERKSHIRE HATHAWAY INC; BUFFETT WARREN E, 10% owner: bought 532,993 shares at $81.65 ($43.52M) on Sep 23, 2026. Filed Sep 25, 2026. View Form 4 on SEC.gov ↗
- BERKSHIRE HATHAWAY INC; BUFFETT WARREN E, 10% owner: bought 483,809 shares at $77.97 ($37.72M) on Sep 21, 2026. Filed Sep 21, 2026. View Form 4 on SEC.gov ↗
All insider trades in LEN →22 smaller transactions not listedCorebridge Financial, Inc. is an American financial services company. Wikipedia (CC BY-SA 4.0) ↗
One insider bought 1,035,062 shares in 6 transactions at an average of $34.65 a share.
- NIPPON LIFE INSURANCE CO, 10% owner: bought 296,668 shares at $34.31 ($10.18M) on Sep 22, 2026 under a 10b5-1 plan. Filed Sep 24, 2026. View Form 4 on SEC.gov ↗
- NIPPON LIFE INSURANCE CO, 10% owner: bought 219,273 shares at $34.13 ($7.48M) on Sep 23, 2026 under a 10b5-1 plan. Filed Sep 25, 2026. View Form 4 on SEC.gov ↗
- NIPPON LIFE INSURANCE CO, 10% owner: bought 212,828 shares at $35.08 ($7.47M) on Sep 21, 2026 under a 10b5-1 plan. Filed Sep 23, 2026. View Form 4 on SEC.gov ↗
All insider trades in CRBG →3 smaller transactions not listedIndustry: Communications Services, NEC. SEC ↗
One insider bought 361,600 shares in 1 transaction at an average of $82.52 a share.
- Monroe James III, Director: bought 361,600 shares at $82.52 ($29.84M) on Sep 18, 2026. Filed Sep 21, 2026. View Form 4 on SEC.gov ↗
Industry: Retail-Computer & Computer Software Stores. SEC ↗
2 insiders bought 1,168,180 shares in 2 transactions at an average of $22.94 a share, including the CEO or CFO.
- Cohen Ryan, President, CEO and Chairman: bought 1,150,680 shares at $22.94 ($26.39M) on Sep 21, 2026. Filed Sep 21, 2026. View Form 4 on SEC.gov ↗
- Attal Alain, Director: bought 17,500 shares at $22.97 ($401.96K) on Sep 21, 2026. Filed Sep 21, 2026. View Form 4 on SEC.gov ↗
Industry: Biological Products, (No Diagnostic Substances). SEC ↗
One insider bought 1,333,333 shares in 2 transactions at an average of $15.00 a share.
- ORBIMED ADVISORS LLC; OrbiMed Capital GP VII LLC; OrbiMed Genesis GP LLC, Director: bought 1,000,000 shares at $15.00 ($15M) on Sep 21, 2026. Filed Sep 23, 2026. View Form 4 on SEC.gov ↗
- ORBIMED ADVISORS LLC; OrbiMed Capital GP VII LLC; OrbiMed Genesis GP LLC, Director: bought 333,333 shares at $15.00 ($5M) on Sep 21, 2026. Filed Sep 23, 2026. View Form 4 on SEC.gov ↗
How this report is made
This report is compiled automatically from SEC Form 4 filings received during the week shown. Companies are ranked by the total dollar value of insider purchases (transaction code P, open-market or private purchase). “Insiders” include officers, directors and owners of more than 10% of a company, which can be investment funds. Only common stock is counted: preferred shares, units and derivatives are left out, as are filings that fail our data checks. When a fund and the insider who controls it both report the same trade, it is counted once. Only U.S.-based companies are ranked, because insiders of foreign companies sometimes report prices in their local currency.
Every figure comes from the original filing, which is linked in each entry; the filing is the authoritative record. This is information, not investment advice. See the methodology, disclaimer and corrections policy.