Skip to content
Insider tapeFilings through Tue, Oct 6
Watchlist
Daily insider recap

Stock market today: insider buys and sells, Wednesday, September 30, 2026

Corporate insiders filed 4 open-market purchases worth $53.9M and 83 sales worth $80.5M. The S&P 500 (SPY) fell 0.2% on the day.

Insider buying$53.9M1 insider
Insider selling$80.5M15 insiders
New cluster buys03+ insiders buying
S&P 500 that day-0.2%SPY

Biggest insider buys

  • Buy

    LEN 10% Owner Berkshire Hathaway Inc bought $52.1M of LEN at $81.59.

  • Buy

    LEN 10% Owner Berkshire Hathaway Inc bought $1.0M of LEN at $81.95.

  • Buy

    LEN 10% Owner Berkshire Hathaway Inc bought $426K of LEN at $81.96.

  • Buy

    LEN 10% Owner Berkshire Hathaway Inc bought $321K of LEN at $79.98.

Biggest insider sales

StockInsiderValuePlan
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$14.8M10b5-1
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$8.5M10b5-1
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$7.8M10b5-1
WDAYWorkday, Inc.David A Duffield10% Owner$7.2M10b5-1
WDAYWorkday, Inc.David A Duffield10% Owner$4.5M10b5-1
WDAYWorkday, Inc.David A Duffield10% Owner$4.4M10b5-1
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$3.9M10b5-1
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$2.8M10b5-1
COSTCostco Wholesale Corp /NewClaudine AdamoPresident$2.0M—
MPWRMonolithic Power Systems, Inc.Michael HsingCEO$1.5M10b5-1

Biggest moves among these stocks

Share-price change on the day, for stocks with insider filings.

Filing dates are when the SEC received each Form 4; trades can be up to two business days earlier. Facts from public filings, not investment advice.