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Thomas Lydia W: insider trades

Director, Other at 2 companies we cover. No open-market purchases and 10 sales not made under a pre-set plan, reported from March 20, 2012 to March 11, 2025.

What happened after Thomas Lydia W’s sales?

After their sales, the shares moved −7.1% against the index over 12 months on average (a negative figure means selling was the right call); 80% trailed it.

With 296 insiders tested, some will look skilled or unskilled by chance alone: when we replaced each insider’s stocks with random companies bought on the same days, about 5.7 cleared the bar ahead and 23.3 behind. One record on its own proves little.

Trade by trade

MeasuredTrades countedAverage vs S&P 500MedianWent the right wayYearst-statisticp-valueEvidence
Purchases, 3 months after the report 0 — — — — — — Not enough years
Purchases, 6 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the trade 0 — — — — — — Not enough years
Sales, 3 months after the report 10 −3.3% −5.3% 60% 9 −1.22 0.26 No reliable evidence
Sales, 12 months after the report 10 −7.1% −11.3% 80% 9 −2.22 0.057 No reliable evidence
Sales, 12 months after the trade 10 −7.3% −11.7% 80% 9 −2.24 0.055 No reliable evidence

“Average vs S&P 500” is the stock’s return including dividends minus the index’s over the same dates, from the close on the first trading day after the report, or from the close on the trade date. Only windows that have finished are counted. For sales, a negative figure means the stock lagged after it was sold, so selling was the right call (green). “Went the right way” is the share of purchases that beat the index, or of sales that trailed it. The t-statistic uses one average per year of reports, because one person’s trades bunch into the same stock and weeks, and needs trades in at least four different years; the p-value comes from the t distribution with that number of years (with four years, a t of 2 has p = 0.14). “Some evidence” means p under 5%, “strong evidence” p under 1% over at least six years.

Companies traded

CompanyTitle on the latest filingPurchasesSalesFirst reportLatest report
Mueller Water Products, Inc. MWA —08November 29, 2018March 11, 2025
Cabot Corp CBT —02March 20, 2012February 10, 2015

Trades and what followed

Moves are against the S&P 500; green means the trade went the insider’s way.

ReportedTradedCompanyTradeValue3 months after report12 months after report12 months after trade
March 11, 2025March 11, 2025 MWA Sale $457,553 −17.7%−15.2%−16.0%
November 20, 2024November 18, 2024 MWA Sale $263,300 +1.7%−16.6%−15.9%
January 22, 2024January 19, 2024 MWA Sale $83,156 +9.7%+38.2%+42.4%
December 6, 2022December 2, 2022 MWA Sale $147,540 +16.4%+3.0%+2.8%
September 3, 2021September 2, 2021 MWA Sale $115,340 −14.1%−17.4%−20.2%
November 18, 2020November 17, 2020 MWA Sale $180,373 +1.2%−7.3%−9.8%
December 11, 2019December 10, 2019 MWA Sale $180,675 −10.8%−15.3%−12.4%
November 29, 2018November 27, 2018 MWA Sale $100,233 −3.2%−5.4%−10.9%
February 10, 2015February 6, 2015 CBT Sale $207,535 −9.2%−4.1%−2.6%
March 20, 2012March 19, 2012 CBT Sale $128,850 −7.5%−31.2%−29.9%

Open-market purchases and sales of at least $10,000 in companies we cover, from SEC Form 4 filings; sales made under a pre-set Rule 10b5-1 plan are not shown. “Not yet” means the window has not finished or the share price was under $5 at entry. These are the shares’ moves after each trade: they say nothing about why Thomas Lydia W traded and do not suggest the use of non-public information. How every insider compares · the insider trading backtest.