Insider buying in the last 30 days
Officers and directors of 2,708 tracked U.S. companies bought $349.7M of their own stock on the open market in the last 30 days across 395 purchases, versus $5.05B sold. 9 companies had cluster buying, with three or more insiders buying at least $250K in total.
- Largest recent purchase: Berkshire Hathaway Inc (10% owner) bought $67.5M of LEN on Oct 2.
- Berkshire Hathaway Inc (10% owner) bought $35.1M of LEN on Oct 2.
- Berkshire Hathaway Inc (10% owner) bought $33.9M of LEN on Oct 1.
Source: SEC Form 4 via EDGAR. Totals count officers and directors, open-market trades (codes P and S).
Showing 25 of the latest 100 transactions
| Ticker | Insider | Value |
|---|---|---|
NEOG NEOGEN CORP | Nassif Mikheal Oct 9, 2026 | $6K Buy |
PRTA PROTHENA CORP PUBLIC LTD CO | SCULLY WILLIAM P Oct 8, 2026 | $771K Buy |
AHRT AH Realty Trust, Inc. | Wimbush Frederick Blair Oct 8, 2026 | $4K Buy |
AHRT AH Realty Trust, Inc. | BIGMAN THEODORE Oct 8, 2026 | $11K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Yuan Lipen Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Yeap Choh Fei Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Zhang Kevin Xiaoqiang Oct 7, 2026 | $5K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Yoo Chue-San Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Wu Shien-Yang Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Wei Che-Chia Oct 7, 2026 | $11K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Wu Yi-Huang Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Wang Ying-Lang Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Mii Yuh-Jier Oct 7, 2026 | $5K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Tien Bor-Zen Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Tien Bor-Zen Oct 7, 2026 | $556 Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Lu Chin-Sheng Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Lu Lee-Chung Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Lin Shyue-Shyh Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Lin Chris Horng-Dar Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Lee Chun-Hsien Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Ku Yao-Ching Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Hwang Yuan-Ko Oct 7, 2026 | $3K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Huang Jen-Chau Oct 7, 2026 | $2K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Jang Syun-Ming Oct 7, 2026 | $4K Buy |
TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Hou Yung-Chin Oct 7, 2026 | $5K Buy |
Frequently asked questions
What is insider buying?
Insider buying is when a company's officers, directors or 10% owners purchase its shares with their own money on the open market. They must report the trade on SEC Form 4, where an open-market purchase is transaction code P.
Is insider buying a bullish signal?
On average, yes. Academic studies going back decades, for example Lakonishok and Lee (2001), find that insider purchases have been followed by above-market returns, especially at smaller companies and when several insiders buy together. Insider sales carry much less information because insiders sell for taxes, diversification and pre-scheduled 10b5-1 plans.
How quickly are insider trades reported?
Insiders must file Form 4 with the SEC within two business days of the trade. SignalX picks up new Form 4 filings from EDGAR throughout the day, so this screener shows purchases within hours of filing.
What do the Form 4 transaction codes mean?
P is an open-market or private purchase and S is a sale. A is a grant or award from the company, M is an option exercise, F is shares withheld to pay taxes and G is a gift. Only P and S reflect an insider choosing to trade at the market price, which is why this screener defaults to open-market buys.
Ask about insider trades
The research agent reads Form 4s, 13Fs, 8-Ks and financials, and cites the filings it used.