Insider trading

Period: 120 months Stock: IDXX Role: CEO × + Add filter Clear all
Views & alerts

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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

48 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

48 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

48 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

48 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
48 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
48 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

48 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
26 Feb 2026
MAZELSKY JONATHAN JAY President and CEO
Sold at will 13×
$15.34M 23,326 at 657.55
21.8%
Not planned
6 Aug 2025
MAZELSKY JONATHAN JAY President and CEO
Sold at will 10×
$18.49M 29,260 at 631.98
26.0%
Not planned
7 Feb 2024
MAZELSKY JONATHAN JAY President and CEO
Sold at will 5×
$6.87M 12,000 at 572.61
13.2%
Not planned
4 Dec 2023
MAZELSKY JONATHAN JAY President and CEO
Sold at will 2×
$3.66M 7,128 at 513.05
8.3%
Not planned
31 Aug 2023
MAZELSKY JONATHAN JAY President and CEO
Sold at will
$6.87M 13,424 at 512.01
15.5%
Not planned
14 Nov 2022
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 4×
$4.56M 10,500 at 434.47
12.9%
7 Nov 2022
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 7×
$5.06M 13,230 at 382.49
17.5%
16 Aug 2021
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 4×
$850.41K 1,263 at 673.33
2.5%
13 Aug 2021
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 3×
$3.20M 4,737 at 675.71
8.5%
17 Feb 2021
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 7×
$7.45M 13,868 at 537.21
20.4%
5 Nov 2020
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 15×
$2.44M 5,206 at 469.31
11.7%
5 Feb 2020
MAZELSKY JONATHAN JAY President & CEO
Sold, plan not stated 6×
$2.22M 8,000 at 277.84
15.8%
5 Aug 2019
MAZELSKY JONATHAN JAY Interim President & CEO
Sold, plan not stated 2×
$2.58M 10,000 at 258.40
30.1%
3 May 2019
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 4×
$6.97M 28,000 at 249.02
2.7%
7 Feb 2019
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$3.28M 15,905 at 206.40
1.5%
6 Feb 2019
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$3.31M 15,905 at 208.13
1.5%
5 Feb 2019
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 4×
$3.26M 15,904 at 205.05
1.5%
23 Aug 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$1.73M 7,000 at 247.33
0.6%
22 Aug 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$3.93M 16,000 at 245.71
1.5%
21 Aug 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$1.70M 7,000 at 243.20
0.7%
8 Feb 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$701.36K 4,000 at 175.34
0.4%
7 Feb 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$3.20M 18,000 at 178.00
1.7%
6 Feb 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 6×
$3.18M 18,000 at 176.63
1.7%
5 Feb 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 4×
$3.27M 18,000 at 181.92
1.7%
11 Jan 2018
AYERS JONATHAN W Chairman, President & CEO
Bought
$2.66M 15,840 at 168.03
1.5%
First buy on file
11 Jan 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$360.78K 2,160 at 167.03
0.2%
10 Jan 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$2.97M 18,000 at 164.88
1.7%
9 Jan 2018
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$2.97M 18,000 at 165.15
1.7%
16 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$2.76M 18,000 at 153.61
1.7%
15 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$2.69M 18,000 at 149.61
1.7%
14 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$2.67M 18,000 at 148.35
1.7%
7 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 4×
$2.68M 18,000 at 148.77
1.7%
6 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 5×
$2.73M 18,000 at 151.46
1.7%
3 Nov 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 5×
$2.77M 18,000 at 153.75
1.7%
28 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$1.96M 13,000 at 150.79
1.2%
16 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$3.11M 20,000 at 155.47
1.9%
15 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$3.09M 20,000 at 154.62
1.9%
14 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$2.79M 18,000 at 154.91
1.7%
9 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$2.63M 17,000 at 154.54
1.6%
8 Aug 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$2.79M 18,000 at 155.22
1.7%
30 May 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$2.18M 13,000 at 167.82
1.3%
10 May 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$4.39M 27,000 at 162.69
2.6%
5 May 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$4.18M 26,000 at 160.61
2.5%
22 Feb 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$4.99M 35,000 at 142.58
3.3%
8 Feb 2017
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 2×
$5.13M 36,250 at 141.63
3.5%
29 Nov 2016
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$1.71M 14,236 at 119.97
1.4%
28 Nov 2016
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated
$1.58M 13,188 at 119.57
1.3%
9 Nov 2016
AYERS JONATHAN W Chairman, President & CEO
Sold, plan not stated 3×
$4.31M 40,000 at 107.85
3.9%
Showing 1–48 of 48.