IDXX
IDEXX LABORATORIES INC /DE
In Vitro & In Vivo Diagnostic SubstancesNasdaqLarge accelerated filer
Total Trades
58
Buys
0
Sells
32
Largest Trade
N/A
Insiders
11
Institutional Funds
1,244
Inst. Value
$1M+
Activist Filings
12
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Hunt Nimrata | Executive Vice Pre… | SELL | $1M+ | 2K | $634.57 | Mar 5, 2026 |
| MAZELSKY JONATHAN JAY | President and CEO | SELL | $1M+ | 23K | $657.55 | Mar 2, 2026 |
| MAZELSKY JONATHAN JAY | President and CEO | EXERCISE | $1M+ | 24K | $144.65 | Mar 2, 2026 |
| Hunt Nimrata | Executive Vice Pre… | SELL | $1M+ | 3K | $661.54 | Feb 27, 2026 |
| FENNELL GEORGE | Executive Vice Pre… | EXERCISE | $500K+ | 13K | $67.85 | Feb 11, 2026 |
| FENNELL GEORGE | Executive Vice Pre… | SELL | $1M+ | 11K | $646.72 | Feb 11, 2026 |
| Hunt Nimrata | Executive Vice Pre… | SELL | $1M+ | 9K | $703.34 | Nov 10, 2025 |
| Hunt Nimrata | Executive Vice Pre… | EXERCISE | $1M+ | 13K | $382.28 | Nov 10, 2025 |
| SZOSTAK M ANNE | Director | SELL | $1M+ | 2K | $647.33 | Aug 26, 2025 |
| SZOSTAK M ANNE | Director | EXERCISE | $100K–$500K | 2K | $206.62 | Aug 26, 2025 |
| SZOSTAK M ANNE | Director | EXERCISE | $100K–$500K | 1K | $160.28 | May 23, 2025 |
| SZOSTAK M ANNE | Director | SELL | $1M+ | 2K | $512.97 | May 23, 2025 |
| JUNIUS DANIEL M | Director | SELL | $1M+ | 3K | $506.41 | May 14, 2025 |
| JUNIUS DANIEL M | Director | EXERCISE | $500K+ | 3K | $263.81 | May 14, 2025 |
| Vandebroek Sophie V. | Director | EXERCISE | $100K–$500K | 1K | $283.59 | May 13, 2025 |
| Vandebroek Sophie V. | Director | SELL | $500K+ | 1K | $491.34 | May 13, 2025 |
| Vandebroek Sophie V. | Director | SELL | $100K–$500K | 344 | $420.44 | Nov 29, 2024 |
| FENNELL GEORGE | SVP | SELL | $1M+ | 8K | $573.87 | Feb 9, 2024 |
| FENNELL GEORGE | SVP | EXERCISE | $500K+ | 10K | $62.00 | Feb 9, 2024 |
| MCKEON BRIAN P | EVP | SELL | $1M+ | 23K | $570.01 | Feb 9, 2024 |
| MCKEON BRIAN P | EVP | EXERCISE | $1M+ | 23K | $141.60 | Feb 9, 2024 |
| MAZELSKY JONATHAN JAY | President and CEO | EXERCISE | $500K+ | 12K | $67.85 | Feb 9, 2024 |
| MAZELSKY JONATHAN JAY | President and CEO | SELL | $1M+ | 12K | $572.61 | Feb 9, 2024 |
| MAZELSKY JONATHAN JAY | President and CEO | SELL | $1M+ | 13K | $512.01 | Sep 5, 2023 |
| MAZELSKY JONATHAN JAY | President and CEO | EXERCISE | $1M+ | 13K | $79.54 | Sep 5, 2023 |
| POLEWACZYK JAMES F | Executive Vice Pre… | SELL | $1M+ | 23K | $510.56 | Aug 31, 2023 |
| POLEWACZYK JAMES F | Executive Vice Pre… | EXERCISE | $1M+ | 17K | $144.21 | Aug 31, 2023 |
| AYERS JONATHAN W | Director | SELL | N/A | 492 | — | Aug 17, 2023 |
| Lane Michael | Executive Vice Pre… | EXERCISE | $1M+ | 16K | $187.47 | Aug 7, 2023 |
| Lane Michael | Executive Vice Pre… | SELL | $1M+ | 16K | $510.00 | Aug 7, 2023 |
| AYERS JONATHAN W | Director | EXERCISE | $1M+ | 20K | $79.54 | May 22, 2023 |
| AYERS JONATHAN W | Director | SELL | $1M+ | 20K | $490.29 | May 22, 2023 |
| SZOSTAK M ANNE | Director | SELL | $500K+ | 2K | $474.89 | May 8, 2023 |
| Lane Michael | Executive Vice Pre… | SELL | $100K–$500K | 1K | $484.00 | May 8, 2023 |
| Vandebroek Sophie V. | Director | SELL | $1M+ | 2K | $469.02 | May 5, 2023 |
| Vandebroek Sophie V. | Director | EXERCISE | $100K–$500K | 2K | $206.62 | May 5, 2023 |
| JUNIUS DANIEL M | Director | EXERCISE | $100K–$500K | 2K | $206.62 | Feb 17, 2023 |
| JUNIUS DANIEL M | Director | SELL | $1M+ | 2K | $511.68 | Feb 17, 2023 |
| Turner Kathy V | Senior Vice Presid… | EXERCISE | <$1K | 10 | $79.54 | Feb 17, 2023 |
| Turner Kathy V | Senior Vice Presid… | SELL | $500K+ | 1K | $510.09 | Feb 17, 2023 |
| Turner Kathy V | Senior Vice Presid… | GRANT | $50K–$100K | 1K | $79.54 | Feb 17, 2023 |
| Turner Kathy V | Senior Vice Presid… | SELL | $1M+ | 2K | $504.59 | Feb 16, 2023 |
| Turner Kathy V | Senior Vice Presid… | EXERCISE | $100K–$500K | 3K | $58.23 | Feb 16, 2023 |
| Turner Kathy V | Senior Vice Presid… | EXERCISE | $50K–$100K | 1K | $79.54 | Feb 13, 2023 |
| Turner Kathy V | Senior Vice Presid… | SELL | $500K+ | 1K | $505.04 | Feb 13, 2023 |
| JUNIUS DANIEL M | Director | SELL | $1M+ | 3K | $424.91 | Dec 7, 2022 |
| JUNIUS DANIEL M | Director | EXERCISE | $100K–$500K | 3K | $160.28 | Dec 7, 2022 |
| SZOSTAK M ANNE | Director | SELL | $100K–$500K | 740 | $428.55 | Dec 6, 2022 |
| SZOSTAK M ANNE | Director | EXERCISE | $100K–$500K | 2K | $160.28 | Dec 6, 2022 |
| Turner Kathy V | Senior Vice Presid… | EXERCISE | $100K–$500K | 3K | $141.60 | Dec 5, 2022 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 1,244 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| VANGUARD GROUP INC | 9.1M | $1M+ | SH |
| J. Stern & Co. LLP | 2.7M | $1M+ | SH |
| STATE STREET CORP | 3.7M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4M | $1M+ | SH |
| POLEN CAPITAL MANAGEMENT LLC | 961K | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 629K | $1M+ | SH |
| Capital Research Global Investors | 608K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 590K | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 550K | $1M+ | SH |
| NORGES BANK | 491K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 485K | $1M+ | SH |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 441K | $1M+ | SH |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 431K | $1M+ | SH |
| CAPITAL COUNSEL LLC/NY | 427K | $1M+ | SH |
| Railway Pension Investments Ltd | 326K | $1M+ | SH |
| AustralianSuper Pty Ltd | 300K | $1M+ | SH |
| Clearbridge Investments, LLC | 293K | $1M+ | SH |
| Neuberger Berman Group LLC | 272K | $1M+ | SH |
| Williams Jones Wealth Management, LLC. | 268K | $1M+ | SH |
| TD ASSET MANAGEMENT INC | 259K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Apr 17, 2025
9.4%
7.6M shares
SC 13G/A · Nov 12, 2024
11.8%
9.7M shares
SC 13G/A · Nov 4, 2024
11.8%
9.7M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
10.1%
8.4M shares
SC 13G/A · Jan 24, 2024
10.9%
9.1M shares
The Vanguard Group - 23-1945930
SC 13G/A · Dec 8, 2023
10.0%
8.3M shares
SC 13G · Feb 14, 2023
5.4%
4.4M shares
SC 13G · Feb 14, 2023
5.4%
4.4M shares
SC 13G/A · Jan 26, 2023
10.3%
8.5M shares
SC 13G/A · Jan 20, 2023
10.3%
8.5M shares
SC 13G/A · Jan 27, 2022
10.6%
9.0M shares
SC 13G/A · Jan 25, 2022
10.6%
9.0M shares