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Parker Teresa: insider trades

Officer at Northern Trust. No open-market purchases and 13 sales not made under a pre-set plan, reported from July 25, 2017 to August 1, 2025.

What happened after Parker Teresa’s sales?

After their sales, the shares moved +0.8% against the index over 12 months on average (a negative figure means selling was the right call); 54% 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 13 −0.3% −0.2% 62% 7 0.20 0.85 No reliable evidence
Sales, 12 months after the report 13 +0.8% −1.5% 54% 7 0.22 0.84 No reliable evidence
Sales, 12 months after the trade 13 0.0% −4.2% 54% 7 0.10 0.92 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
Northern Trust NTRS President/Asset Servicing013July 25, 2017August 1, 2025

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
August 1, 2025July 31, 2025 NTRS Sale $997,458 −6.9%+24.4%+22.1%
May 12, 2025May 9, 2025 NTRS Sale $650,710 +8.2%+28.3%+33.2%
October 29, 2024October 25, 2024 NTRS Sale $447,718 +6.6%+10.2%+10.5%
August 12, 2024August 9, 2024 NTRS Sale $494,525 +17.9%+35.1%+31.5%
October 26, 2021October 22, 2021 NTRS Sale $500,880 0.0%−14.8%−19.3%
April 26, 2021April 23, 2021 NTRS Sale $538,417 −4.0%−1.5%−4.2%
November 19, 2020November 18, 2020 NTRS Sale $215,761 −0.2%+5.0%+0.8%
February 10, 2020February 6, 2020 NTRS Sale $108,702 −14.5%−21.2%−20.3%
January 27, 2020January 24, 2020 NTRS Sale $1,725,651 −6.8%−23.0%−23.1%
April 26, 2019April 25, 2019 NTRS Sale $292,500 −1.9%−15.4%−17.1%
July 24, 2018July 20, 2018 NTRS Sale $606,737 −14.5%−16.6%−19.0%
January 30, 2018January 26, 2018 NTRS Sale $1,074,310 +5.9%−12.0%−7.6%
July 25, 2017July 21, 2017 NTRS Sale $999,122 +6.0%+12.5%+12.8%

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 Parker Teresa traded and do not suggest the use of non-public information. How every insider compares · the insider trading backtest.