Idexx Laboratories

By person

18 insiders · 45 transactions

38.7×

Jonathan J. Mazelsky holds 38.7 times base salary in stock. $44.59M of shares against $1.15M in salary for 2025.

Salary from the company's own proxy. The shares are what Jonathan J. Mazelsky last reported holding, valued at $532.08, the price Common Stock was last bought or sold at on the open market here, on 4 Sep 2026.

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

MAZELSKY JONATHAN JAY

President and CEO

—

$15.34M (13) scheduled

−$15.34M

83,803

0.1064%

$44.59M

+2.4%

Hunt Nimrata

Executive Vice President

—

$9.53M (6) scheduled

−$9.53M

18,141

0.0230%

$9.65M

+54.1%

FENNELL GEORGE

Executive Vice President

—

$7.34M (8) scheduled

−$7.34M

10,433

0.0132%

$5.55M

+50.8%

Erickson Michael G

Executive Vice President

—

$3.37M (6) scheduled

−$3.37M

15,092

0.0192%

$8.03M

+54.2%

Kingsley Lawrence D

Director

—

$1.17M (1) scheduled

−$1.17M

9,568

0.0121%

$5.09M

+7.7%

Vandebroek Sophie V.

Director

—

$920.29K (2) scheduled

−$920.29K

905

0.0011%

$481.53K

−38.6%

MCKEON BRIAN P

EVP, CFO and Treasurer

—

31,550

0.0400%

$16.79M

+1.9%

Lane Michael

Executive Vice President

—

8,024

0.0102%

$4.27M

+22.7%

Underberg Sharon E.

EVP, GC & Corporate Secretary

—

7,138

0.0091%

$3.80M

+25.4%

Emerson Andrew

EVP, CFO and Treasurer

—

4,421

0.0056%

$2.35M

+79.6%

JUNIUS DANIEL M

Director

—

3,561

0.0045%

$1.89M

+17.1%

Schreck Michael

Executive Vice President

—

3,089

0.0039%

$1.64M

+212.7%

Johnson Michael Perkins

Executive Vice President

—

2,795

0.0035%

$1.49M

+899.2%

ESSIG STUART

Director

—

2,236

0.0028%

$1.19M

+13.3%

Smith Martin Alexander

Executive Vice President

—

2,157

0.0027%

$1.15M

+268.9%

SZOSTAK M ANNE

Director

—

778

0.0010%

$413.96K

−82.8%

HOOLEY JOSEPH L

Director

—

325

0.0004%

$172.93K

—

Peacock Karen

Director

—

102

0.0001%

$54.27K

+10,100%

Individual transactions

Insider

Date

Role

Action

Price

Amount

Kingsley Lawrence D

4 Sep 2026

Director

Sold after exercise

2,203

$532.08

$1.17M

Emerson Andrew

20 Aug 2026

EVP, CFO and Treasurer

Exercised, kept

265

$178.26

$47.24K

Hunt Nimrata

3 Mar 2026

Executive Vice President

Sell

1,758

$634.57

$1.12M

Underberg Sharon E.

3 Mar 2026

EVP, GC & Corporate Secretary

Exercised, kept

197

$505.53

$99.59K

MAZELSKY JONATHAN JAY

27 Feb 2026

President and CEO

Exercised, kept

197

$505.53

$99.59K

Hunt Nimrata

26 Feb 2026

Executive Vice President

Sell

2,693

$661.54

$1.78M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

2,589

$663.04

$1.72M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,000

$662.16

$662.16K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,200

$661.10

$793.32K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

2,859

$659.75

$1.89M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

3,660

$658.92

$2.41M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

2,860

$657.84

$1.88M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,343

$656.85

$882.14K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,488

$655.85

$975.90K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,111

$654.63

$727.29K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,171

$653.68

$765.45K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,669

$652.49

$1.09M

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,095

$651.49

$713.38K

MAZELSKY JONATHAN JAY

26 Feb 2026

President and CEO

Sold after exercise

1,281

$650.67

$833.51K

Erickson Michael G

19 Feb 2026

Executive Vice President

Exercised, kept

197

$505.53

$99.59K

Erickson Michael G

19 Feb 2026

Executive Vice President

Exercised, kept

183

$544.08

$99.57K

Erickson Michael G

19 Feb 2026

Executive Vice President

Exercised, kept

483

$206.94

$99.95K

Erickson Michael G

19 Feb 2026

Executive Vice President

Exercised, kept

817

$178.26

$145.64K

Erickson Michael G

19 Feb 2026

Executive Vice President

Exercised, kept

719

$141.60

$101.81K

Vandebroek Sophie V.

17 Feb 2026

Director

Sold after exercise

519

$628.56

$326.22K

Vandebroek Sophie V.

17 Feb 2026

Director

Sold after exercise

945

$628.65

$594.07K

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

$629.86

$25.19K

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

689

$629.09

$433.44K

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

2,694

$628.22

$1.69M

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

1,288

$626.26

$806.62K

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

204

$625.24

$127.55K

Erickson Michael G

17 Feb 2026

Executive Vice President

Sold after exercise

456

$623.76

$284.43K

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

$650.32

$26.01K

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

2,809

$649.26

$1.82M

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

966

$648.78

$626.72K

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

1,060

$647.21

$686.04K

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

2,782

$646.23

$1.80M

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

2,161

$645.25

$1.39M

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

397

$644.02

$255.67K

FENNELL GEORGE

10 Feb 2026

Executive Vice President

Sold after exercise

1,130

$643.00

$726.59K

FENNELL GEORGE

9 Feb 2026

Executive Vice President

Exercised, kept

1,476

$67.85

$100.15K

Hunt Nimrata

7 Nov 2025

Executive Vice President

Sold after exercise

1,378

$705.54

$972.24K

Hunt Nimrata

7 Nov 2025

Executive Vice President

Sold after exercise

1,468

$704.87

$1.03M

Hunt Nimrata

7 Nov 2025

Executive Vice President

Sold after exercise

1,465

$703.73

$1.03M

Hunt Nimrata

7 Nov 2025

Executive Vice President

Sold after exercise

5,114

$702.20

$3.59M

By person

Individual transactions

What was left out