Idexx Laboratories IDXX
Idexx Laboratories is the 254th largest S&P 500 company by market cap, worth $44.1 billion. 11 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 8 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 12.5% of the company.
- CEO
- Jonathan Jay Mazelsky
- Sector
- Health Care
- Sub-industry
- Health Care Equipment
- Headquarters
- Westbrook, Maine
- Founded
- 1983
- More
- Wikipedia
- Market cap
- $44.1B
- 254th largest, 23 Oct 2026 close
- Price to sales
- 10.3
- Market cap over revenue
- Market cap per employee
- $4.0M
- Market cap over employees
- Connections
- 6
- S&P 500 companies sharing a director or officer
Largest institutional holders
Each fund group's share of Idexx Laboratories. Where a company has several share classes, the share is of its total value.
13F filings for the quarter to 30 Jun 2026
Board and officers
5 people here also hold roles at other S&P 500 companies.
Roles filed up to 30 Sep 2026
| Name | Title |
|---|---|
| Directors (11) | |
| Jonathan Jay MazelskyPresident and CEOAlso at InsuletLast filed 2 Mar 2026 | |
| Irene Chang BrittDirector | |
| Bruce L. ClaflinDirectorAlso at Ciena | |
| Stuart EssigDirector | |
| Joseph L. HooleyDirectorAlso at Aptiv and ExxonMobil | |
| Daniel M. JuniusDirector | |
| Lawrence D. KingsleyDirector | |
| Karen PeacockDirector | |
| Sam SamadDirectorAlso at Quest Diagnostics | |
| M. Anne SzostakDirector | |
| Sophie V. VandebroekDirectorAlso at Revvity | |
| Officers (8) | |
| Andrew EmersonEVP, CFO and TreasurerLast filed 24 Aug 2026 | |
| Michael G. EricksonExecutive Vice PresidentLast filed 3 Mar 2026 | |
| George FennellExecutive Vice PresidentLast filed 2 Jun 2026 | |
| Michael Perkins JohnsonExecutive Vice PresidentLast filed 17 Feb 2026 | |
| Michael LaneExecutive Vice PresidentLast filed 17 Feb 2026 | |
| Michael SchreckExecutive Vice PresidentLast filed 17 Feb 2026 | |
| Martin Alexander SmithExecutive Vice PresidentLast filed 17 Feb 2026 | |
| Sharon E. UnderbergEVP, GC & Corporate SecretaryLast filed 5 Mar 2026 | |
Companies that share people with Idexx Laboratories
Each person's title here, then at the other company.
- Aptiv APTV
- Joseph L. Hooley: Director here, Director there
- Ciena CIEN
- Bruce L. Claflin: Director here, Director there
- ExxonMobil XOM
- Joseph L. Hooley: Director here, Director there
- Insulet PODD
- Jonathan Jay Mazelsky: President and CEO here, Director there
- Quest Diagnostics DGX
- Sam Samad: Director here, Executive Vice President & CFO there
- Revvity RVTY
- Sophie V. Vandebroek: Director here, Director there
Idexx Laboratories' market cap since December 2008
Weekly, up to 23 Oct 2026
| Week ending | Market cap |
|---|---|
| 23 Oct 2026 | $44.1B |
| 26 Dec 2025 | $55.0B |
| 27 Dec 2024 | $34.0B |
| 29 Dec 2023 | $46.1B |
| 30 Dec 2022 | $33.8B |
| 31 Dec 2021 | $55.8B |
| 25 Dec 2020 | $42.4B |
| 27 Dec 2019 | $22.6B |
| 28 Dec 2018 | $16.0B |
| 29 Dec 2017 | $13.6B |
| 30 Dec 2016 | $10.5B |
| 25 Dec 2015 | $6.6B |
| 26 Dec 2014 | $7.1B |
| 27 Dec 2013 | $5.5B |
| 28 Dec 2012 | $5.0B |
| 30 Dec 2011 | $4.3B |
| 31 Dec 2010 | $4.0B |
| 25 Dec 2009 | $3.1B |
| 26 Dec 2008 | $2.1B |
Download Idexx Laboratories' data as JSON, with the weekly market caps in billions of dollars from 5 Dec 2008.
Workforce
Headcount at 31 Dec 2025
- Employees
- 11,000
As of December 31, 2025, we had approximately 11,000 regular full-time and part-time employees in approximately 34 countries around the world, and men and women represented 41% and 59%, respectively, of our global employee population.
Insider trades
Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.
Trades from 30 Sep 2025 to 30 Sep 2026
Directors and officers sold $37.7 million of stock in 8 sales and made no open-market purchases in the 12 months to 30 Sep 2026.
| Date | Person | Value |
|---|---|---|
| 4 Sep 2026Sale | Lawrence D. KingsleyDirector | $1.2M |
| 3 Mar 2026Sale | Nimrata HuntExecutive Vice President | $1.1M |
| 26 Feb 2026Sale | Jonathan Jay MazelskyPresident and CEO | $15M |
| 26 Feb 2026Sale | Nimrata HuntExecutive Vice President | $1.8M |
| 17 Feb 2026Sale | Michael G. EricksonExecutive Vice President | $3.4M |
| 17 Feb 2026Sale | Sophie V. VandebroekDirector | $920K |
| 10 Feb 2026Sale | George FennellExecutive Vice President | $7.3M |
| 7 Nov 2025Sale | Nimrata HuntExecutive Vice President | $6.6M |
Trades by members of Congress and officials
Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.
Trades from 20 Oct 2023 to 20 Oct 2026
8 people disclosed 27 purchases and 25 sales of Idexx Laboratories stock since October 2023.
| Date | Member or official | Amount |
|---|---|---|
| 25 Sep 2026 | Rohit KhannaHouse, D-CA 路 Bought | $1K to $15K |
| 11 Sep 2026 | Rohit KhannaHouse, D-CA 路 Sold | $15K to $50K |
| 4 Sep 2026 | Rohit KhannaHouse, D-CA 路 Sold | $1K to $15K |
| 3 Aug 2026 | Rohit KhannaHouse, D-CA 路 Bought | $1K to $15K |
| 23 Jul 2026 | Donald J TrumpPresident 路 Sold | $15K to $50K |
| 17 Jul 2026 | Donald J TrumpPresident 路 Sold | $1K to $15K |
| 23 Jun 2026 | Donald J TrumpPresident 路 Sold | $1K to $15K |
| 16 Jun 2026 | Donald J TrumpPresident 路 Bought | $15K to $50K |
| 12 Jun 2026 | Donald J TrumpPresident 路 Sold | $1K to $15K |
| 3 Jun 2026 | Donald J TrumpPresident 路 Bought | $1K to $15K |
Showing 10 of 52 trades
Not on file: no WARN layoff notices under its own name since October 2023.