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Thomson Andrew Justin Mackenzie: insider trades

Officer at T. Rowe Price. No open-market purchases and 12 sales not made under a pre-set plan, reported from February 17, 2021 to December 11, 2024.

What happened after Thomson Andrew Justin Mackenzie’s sales?

After their sales, the shares moved −20.0% against the index over 12 months on average (a negative figure means selling was the right call); 100% 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 12 −3.3% −7.2% 58% 4 −1.89 0.15 No reliable evidence
Sales, 12 months after the report 12 −20.0% −21.6% 100% 4 −10.26 0.002 Some evidence: seller right
Sales, 12 months after the trade 12 −20.2% −22.0% 100% 4 −11.84 0.001 Some evidence: seller right

“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
T. Rowe Price TROW Vice President012February 17, 2021December 11, 2024

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
December 11, 2024December 10, 2024 TROW Sale $499,197 −13.9%−22.3%−24.9%
September 9, 2024September 6, 2024 TROW Sale $1,230,772 +10.0%−14.3%−12.0%
December 19, 2023December 18, 2023 TROW Sale $1,267,637 +1.5%−13.4%−15.0%
December 11, 2023December 8, 2023 TROW Sale $573,703 +6.9%−4.6%−2.0%
August 31, 2023August 30, 2023 TROW Sale $1,338,374 −10.3%−26.9%−27.4%
February 22, 2023February 21, 2023 TROW Sale $1,370,737 −9.8%−25.6%−26.6%
December 12, 2022December 9, 2022 TROW Sale $840,228 −9.5%−27.4%−33.2%
August 4, 2022August 4, 2022 TROW Sale $1,509,142 −8.3%−14.4%−13.3%
February 23, 2022February 22, 2022 TROW Sale $1,174,251 −6.1%−13.0%−12.3%
December 14, 2021December 10, 2021 TROW Sale $1,442,048 −17.5%−23.8%−22.1%
June 7, 2021June 3, 2021 TROW Sale $4,500,445 +4.8%−32.7%−31.9%
February 17, 2021February 12, 2021 TROW Sale $3,820,636 +12.6%−21.0%−21.9%

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 Thomson Andrew Justin Mackenzie traded and do not suggest the use of non-public information. How every insider compares · the insider trading backtest.