USBoard
Person

Jonathan Jay Mazelsky

Executive Chair of the Board · Director, Idexx Laboratories

Current S&P 500 boards
2
Current roles
2
Open-market buys
$0
Open-market sales
$97.3M

Current roles

From Section 16 filings (Forms 3, 4 and 5) in the last 13 months.

Past roles

“Last filing” is the latest Form 3/4/5 for that company, an upper bound on the end date.

None on record since 2016.

Sits alongside

People who currently share a board or management team with this person.

Open-market trades

Purchases and sales reported on Form 4 at S&P 500 companies.

DateCompanyTypeSharesPriceValue
Nov 4, 2026IDXXSale1,945$698.26$1.4M
Nov 4, 2026IDXXSale4,075$699.33$2.8M
Nov 4, 2026IDXXSale1,667$700.33$1.2M
Nov 4, 2026IDXXSale4,540$701.36$3.2M
Nov 4, 2026IDXXSale2,136$702.21$1.5M
Nov 4, 2026IDXXSale3,950$703.45$2.8M
Nov 4, 2026IDXXSale240$705.59$169K
Nov 4, 2026IDXXSale840$707.00$594K
Nov 4, 2026IDXXSale1,840$707.84$1.3M
Nov 4, 2026IDXXSale1,300$709.00$922K
Nov 4, 2026IDXXSale1,501$710.12$1.1M
Nov 4, 2026IDXXSale775$711.31$551K
Nov 4, 2026IDXXSale331$711.95$236K
Feb 26, 2026IDXXSale2,860$657.84$1.9M
Feb 26, 2026IDXXSale1,095$651.49$713K
Feb 26, 2026IDXXSale1,281$650.67$834K
Feb 26, 2026IDXXSale2,589$663.04$1.7M
Feb 26, 2026IDXXSale1,000$662.16$662K
Feb 26, 2026IDXXSale1,200$661.10$793K
Feb 26, 2026IDXXSale2,859$659.75$1.9M
Feb 26, 2026IDXXSale1,669$652.49$1.1M
Feb 26, 2026IDXXSale1,171$653.68$765K
Feb 26, 2026IDXXSale1,111$654.63$727K
Feb 26, 2026IDXXSale1,488$655.85$976K
Feb 26, 2026IDXXSale1,343$656.85$882K
Feb 26, 2026IDXXSale3,660$658.92$2.4M
Aug 6, 2025IDXXSale1,095$626.90$686K
Aug 6, 2025IDXXSale1,525$628.27$958K
Aug 6, 2025IDXXSale3,397$629.82$2.1M
Aug 6, 2025IDXXSale6,056$630.59$3.8M
Aug 6, 2025IDXXSale660$639.37$422K
Aug 6, 2025IDXXSale3,000$632.56$1.9M
Aug 6, 2025IDXXSale3,526$635.13$2.2M
Aug 6, 2025IDXXSale1,822$636.15$1.2M
Aug 6, 2025IDXXSale880$636.81$560K
Aug 6, 2025IDXXSale7,299$631.61$4.6M
Feb 7, 2024IDXXSale705$575.48$406K
Feb 7, 2024IDXXSale1,353$574.75$778K
Feb 7, 2024IDXXSale462$573.19$265K
Feb 7, 2024IDXXSale5,356$571.71$3.1M
Feb 7, 2024IDXXSale4,124$572.53$2.4M
Dec 4, 2023IDXXSale5,804$512.95$3.0M
Dec 4, 2023IDXXSale1,324$513.51$680K
Aug 31, 2023IDXXSale13,424$512.01$6.9M
Nov 14, 2022IDXXSale2,543$435.07$1.1M
Nov 14, 2022IDXXSale6,385$434.26$2.8M
Nov 14, 2022IDXXSale972$433.37$421K
Nov 14, 2022IDXXSale600$435.88$262K
Nov 7, 2022IDXXSale2,000$379.50$759K
Nov 7, 2022IDXXSale900$378.60$341K
Nov 7, 2022IDXXSale3,018$384.47$1.2M
Nov 7, 2022IDXXSale2,716$383.29$1.0M
Nov 7, 2022IDXXSale392$385.01$151K
Nov 7, 2022IDXXSale500$380.85$190K
Nov 7, 2022IDXXSale3,704$382.81$1.4M
Aug 16, 2021IDXXSale60$675.44$41K
Aug 16, 2021IDXXSale533$672.36$358K
Aug 16, 2021IDXXSale488$673.69$329K
Aug 16, 2021IDXXSale182$674.48$123K
Aug 13, 2021IDXXSale3,417$675.34$2.3M
Aug 13, 2021IDXXSale337$677.58$228K
Aug 13, 2021IDXXSale983$676.38$665K
Feb 17, 2021IDXXSale300$540.82$162K
Feb 17, 2021IDXXSale583$542.08$316K
Feb 17, 2021IDXXSale100$543.14$54K
Feb 17, 2021IDXXSale3,069$537.84$1.7M
Feb 17, 2021IDXXSale5,376$536.78$2.9M
Feb 17, 2021IDXXSale3,940$535.94$2.1M
Feb 17, 2021IDXXSale500$538.83$269K
Nov 5, 2020IDXXSale1,307$465.02$608K
Nov 5, 2020IDXXSale107$465.81$50K
Nov 5, 2020IDXXSale310$467.33$145K
Nov 5, 2020IDXXSale400$468.92$188K
Nov 5, 2020IDXXSale714$470.34$336K
Nov 5, 2020IDXXSale264$471.34$124K
Nov 5, 2020IDXXSale247$473.99$117K
Nov 5, 2020IDXXSale200$475.18$95K
Nov 5, 2020IDXXSale300$476.73$143K
Nov 5, 2020IDXXSale209$468.47$98K
Nov 5, 2020IDXXSale246$469.86$116K
Nov 5, 2020IDXXSale100$470.79$47K
Nov 5, 2020IDXXSale147$473.99$70K
Nov 5, 2020IDXXSale300$476.73$143K
Nov 5, 2020IDXXSale355$463.45$165K
Feb 5, 2020IDXXSale1,145$275.72$316K
Feb 5, 2020IDXXSale1,337$276.71$370K
Feb 5, 2020IDXXSale3,354$277.88$932K
Feb 5, 2020IDXXSale1,676$279.01$468K
Feb 5, 2020IDXXSale100$280.13$28K
Feb 5, 2020IDXXSale388$281.97$109K
Aug 5, 2019IDXXSale5,401$258.07$1.4M
Aug 5, 2019IDXXSale4,599$258.80$1.2M

SEC reporting-owner ID (CIK) 1556270 · all filings on EDGAR

Jonathan Jay Mazelsky (IDXX, PODD) | USBoard