Idexx Laboratories Inc /De (IDXX) Insider Ownership

Historic Insider Ownership Trends

Idexx Laboratories's top three insider shareholders as of June 06, 2026 are Jonathan W Ayers (Director, 419.57K shares), Jonathan W Ayers (Chairman, President Ceo, 122.61K shares), Jonathan Jay Mazelsky (President And Ceo, 83.80K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Daniel M Junius - 3,304 0 14 May, 2025
M Anne Szostak - 262 1,801 26 Aug, 2025
Joseph L Hooley - 75 0 03 Feb, 2026
Jonathan W Ayers - 0 419,574 09 Sep, 2024
Stuart Essig - 2,236 0 08 May, 2025
James F Polewaczyk Executive Vice President 10,711 0 07 Mar, 2024
Bruce L. Claflin - 0 1,560 01 Dec, 2021
Sophie V. Vandebroek - 0 8,173 05 May, 2023
Giovani Twigge Senior Vice President 20,329 0 25 Feb, 2022
Irene Chang Britt - 208 0 08 May, 2024
George Fennell Executive Vice President 10,078 0 17 Feb, 2026
Jonathan Jay Mazelsky President And Ceo 83,803 0 02 Mar, 2026
Martin Alexander Smith Executive Vice President 2,157 0 17 Feb, 2026
Sharon E. Underberg Evp, Gc Corporate Secretary 7,138 0 05 Mar, 2026
Michael Lane Executive Vice President 8,024 0 17 Feb, 2026
Kathy V Turner Senior Vice President 7,380 0 17 Feb, 2023
Nimrata Hunt Executive Vice President 18,141 0 05 Mar, 2026
Asha Collins - 779 0 08 May, 2024
Michael Perkins Johnson Executive Vice President 2,795 0 17 Feb, 2026
Michael Schreck Executive Vice President 3,089 0 17 Feb, 2026
Michael G Erickson Executive Vice President 15,092 0 19 Feb, 2026
Andrew Emerson Evp, Cfo And Treasurer 4,222 0 17 Feb, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
03 Mar, 2026 Sharon E. Underberg Common Stock A 197 $505.53 7,138 D M
03 Mar, 2026 Sharon E. Underberg Common Stock A 197 $505.53 7,138 D M
03 Mar, 2026 Nimrata Hunt Common Stock D 1,758 $634.57 18,141 D S
03 Mar, 2026 Sharon E. Underberg Incentive Stock Option (right-to-buy) D 197 - 0 D M
03 Mar, 2026 Sharon E. Underberg Incentive Stock Option (right-to-buy) D 197 - 0 D M
12 Feb, 2026 Michael G Erickson Non-Qualified Stock Option (right-to-buy) A 13,667 $0.00 13,667 D A
12 Feb, 2026 Michael G Erickson Incentive Stock Option (right-to-buy) A 162 $0.00 162 D A
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock A 23,326 $141.60 106,932 D M
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock A 23,326 $141.60 106,932 D M
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,281 $650.67 105,651 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,281 $650.67 105,651 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,095 $651.49 104,556 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,095 $651.49 104,556 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,669 $652.49 102,887 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,669 $652.49 102,887 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,171 $653.68 101,716 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,171 $653.68 101,716 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,111 $654.63 100,605 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,111 $654.63 100,605 D S
26 Feb, 2026 Jonathan Jay Mazelsky Common Stock D 1,488 $655.85 99,117 D S