IDXX Insider Trading

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Insider Trading History
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Insider Ownership Percentage: 0.79%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $37,663,260.38

IDEXX Laboratories Insider Trading History Chart

IDEXX Laboratories Share Price & Price History

^$506.48

▼ -7.14 (-1.39%)

As of 09/17/2026 04:00 PM ET

Days: 30 | 90 | 365

IDEXX Laboratories Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
9/4/2026	Lawrence D Kingsley	Director	Sell	2,203	$532.08	$1,172,172.24	9,568
3/3/2026	Nimrata Hunt	EVP	Sell	1,758	$634.57	$1,115,574.06	18,141
2/26/2026	Jonathan Jay Mazelsky	CEO	Sell	23,326	$657.55	$15,338,011.30	83,606
2/26/2026	Nimrata Hunt	EVP	Sell	2,693	$661.54	$1,781,527.22	19,899
2/17/2026	Michael G. Erickson	EVP	Sell	5,371	$627.38	$3,369,657.98	12,693
2/17/2026	Sophie V Vandebroek	Director	Sell	1,464	$628.62	$920,299.68	648
2/10/2026	George Fennell	EVP	Sell	11,345	$646.72	$7,337,038.40	9,823
11/7/2025	Nimrata Hunt	EVP	Sell	9,425	$703.34	$6,628,979.50	21,149
8/22/2025	M. Anne Szostak	Director	Sell	2,187	$647.33	$1,415,710.71	262
8/12/2025	Michael G. Erickson	EVP	Sell	406	$649.96	$263,883.76	11,287
8/11/2025	Nimrata Hunt	EVP	Sell	1,200	$656.53	$787,836.00	16,807
8/8/2025	Sharon E. Underberg	EVP	Sell	5,450	$651.60	$3,551,220.00	6,156
8/6/2025	Jonathan Jay Mazelsky	CEO	Sell	29,260	$631.98	$18,491,734.80	83,311
8/6/2025	Michael Lane	EVP	Sell	8,411	$627.74	$5,279,921.14	7,132
8/6/2025	Nimrata Hunt	EVP	Sell	7,143	$630.43	$4,503,161.49	18,007
5/21/2025	M. Anne Szostak	Director	Sell	1,046	$513.74	$537,372.04	262
5/21/2025	M. Anne Szostak	Director	Sell	1,260	$512.34	$645,548.40	1,801
2/10/2025	George Fennell	EVP	Sell	9,986	$462.53	$4,618,824.58	8,176
2/7/2025	M. Anne Szostak	Director	Sell	3,000	$465.94	$1,397,820.00	3,061
11/27/2024	Sophie V Vandebroek	Director	Sell	344	$420.44	$144,631.36	905
5/17/2024	Bruce L. Claflin	Director	Sell	200	$540.80	$108,160.00	161
2/8/2024	George Fennell	SVP	Sell	8,198	$573.87	$4,704,586.26	6,712
2/7/2024	Brian P. Mckeon	CFO	Sell	23,326	$570.01	$13,296,053.26	29,718
2/7/2024	Jonathan Jay Mazelsky	CEO	Sell	12,000	$572.61	$6,871,320.00	79,247
12/7/2023	James F Polewaczyk	EVP	Sell	11,636	$521.79	$6,071,548.44	10,050
12/4/2023	Jonathan Jay Mazelsky	CEO	Sell	7,128	$513.05	$3,657,020.40	79,233

SEC Filings (Institutional Ownership Changes) for IDEXX Laboratories (NASDAQ:IDXX)

87.84% of IDEXX Laboratories stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

IDEXX Laboratories Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
9/9/2026	Sequoia Financial Advisors LLC	4,243	$2.23M	0.0%	-9.7%	0.005%
9/9/2026	Tidal Investments LLC	19,109	$10.06M	0.0%	-50.8%	0.024%
9/9/2026	Archford Capital Strategies LLC	1,903	$1M	0.1%	-35.7%	0.002%
9/9/2026	National Pension Service	129,305	$68.07M	0.0%	+5.6%	0.164%
9/9/2026	Engineers Gate Manager LP	5,186	$2.73M	0.0%	+162.6%	0.007%
9/9/2026	SVB Wealth LLC	6,764	$3.56M	0.2%	-7.8%	0.009%
9/9/2026	Integrated Wealth Concepts LLC	11,257	$5.93M	0.0%	-0.7%	0.014%
9/9/2026	RFG Advisory LLC	1,189	$0.63M	0.0%	-10.7%	0.002%
9/9/2026	NewEdge Advisors LLC	14,787	$7.79M	0.0%	-2.9%	0.019%
9/9/2026	IFP Advisors Inc	585	$0.31M	0.0%	+9.8%	0.001%
9/9/2026	Baird Financial Group Inc.	76,035	$40.03M	0.1%	-7.9%	0.097%
9/9/2026	Sterling Investment Advisors Ltd.	1,200	$0.63M	0.1%	+9.1%	0.002%
9/8/2026	Ramsay Stattman Vela & Price Inc.	3,656	$1.93M	0.3%	-8.9%	0.005%
9/8/2026	Allworth Financial LP	2,531	$1.33M	0.0%	-53.2%	0.003%
9/8/2026	Arizona State Retirement System	22,772	$11.99M	0.1%	+4.9%	0.029%
9/8/2026	Waverly Advisors LLC	2,995	$1.58M	0.0%	-5.5%	0.004%
9/8/2026	Empirical Finance LLC	2,943	$1.55M	0.1%	+3.2%	0.004%
9/8/2026	Nykredit A S	36,943	$19.45M	0.1%	N/A	0.047%
8/27/2026	Corient Private Wealth LP	111,488	$58.69M	0.1%	-8.6%	0.142%
8/27/2026	Formuepleje A S	1,855	$0.98M	0.1%	N/A	0.002%
8/26/2026	Amundi	569,725	$299.93M	0.1%	-6.7%	0.723%
8/26/2026	HighTower Advisors LLC	28,415	$14.96M	0.0%	-0.4%	0.036%
8/25/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	92,218	$48.55M	0.3%	N/A	0.117%
8/23/2026	Kraematon Investment Advisors Inc.	5,130	$2.70M	2.0%	-1.6%	0.007%
8/23/2026	HB Wealth Management LLC	4,167	$2.19M	0.0%	-2.6%	0.005%
8/23/2026	Saudi Central Bank	5,560	$2.93M	0.0%	+88.7%	0.007%
8/23/2026	Azimuth Capital Investment Management LLC	18,111	$9.53M	0.3%	-40.1%	0.023%
8/22/2026	AlphaGrep UK Ltd	2,630	$1.39M	0.4%	N/A	0.003%
8/22/2026	Maloon Powers Pitre Higgins & Dennehy LLC	576	$0.30M	0.1%	N/A	0.001%
8/22/2026	Blalock Williams LLC	827	$0.44M	0.3%	-9.6%	0.001%
8/22/2026	Plan A Wealth LLC	385	$0.20M	0.1%	N/A	0.000%
8/22/2026	SVRN Asset Management LLC	550	$0.29M	0.1%	N/A	0.001%
8/22/2026	Three Seasons Wealth LLC	1,516	$0.80M	0.1%	+8.8%	0.002%
8/22/2026	Raiffeisen Bank International AG	41,815	$22.41M	0.3%	-1.8%	0.053%
8/22/2026	Syon Capital LLC	1,668	$0.88M	0.0%	+22.9%	0.002%
8/22/2026	TD Waterhouse Canada Inc.	5,721	$3.08M	0.0%	-34.5%	0.007%
8/22/2026	Premier Path Wealth Partners LLC	472	$0.25M	0.0%	-14.8%	0.001%
8/22/2026	Concurrent Investment Advisors LLC	1,199	$0.63M	0.0%	+32.2%	0.002%
8/22/2026	NEOS Investment Management LLC	60,354	$31.77M	0.1%	+12.5%	0.077%
8/21/2026	iSAM Funds UK Ltd	560	$0.30M	0.2%	N/A	0.001%
8/20/2026	Proficio Capital Partners LLC	728	$0.38M	0.0%	N/A	0.001%
8/20/2026	NS Partners Ltd	28,950	$15.24M	0.7%	-17.8%	0.037%
8/20/2026	Railway Pension Investments Ltd	45,360	$23.88M	0.3%	-82.3%	0.058%
8/20/2026	Grandeur Peak Global Advisors LLC	2,229	$1.17M	0.3%	+21.4%	0.003%
8/20/2026	Fundsmith LLP	1,019,887	$536.91M	3.9%	-30.4%	1.295%
8/20/2026	Oarsman Capital Inc.	494	$0.26M	0.0%	-16.7%	0.001%
8/20/2026	Headlands Technologies LLC	2,133	$1.12M	0.1%	+46.0%	0.003%
8/20/2026	Quantitative Investment Management LLC	3,148	$1.66M	0.2%	-27.8%	0.004%
8/20/2026	Ancora Advisors LLC	835	$0.44M	0.0%	-3.8%	0.001%
8/20/2026	Two Sigma Securities LLC	2,636	$1.39M	0.1%	+166.0%	0.003%
8/20/2026	Benjamin Edwards Inc.	3,972	$2.09M	0.0%	-6.8%	0.005%
8/20/2026	Alyeska Investment Group L.P.	401,082	$211.15M	0.5%	+97.3%	0.509%
8/20/2026	Flputnam Investment Management Co.	14,882	$7.83M	0.1%	-2.2%	0.019%
8/20/2026	Northwestern Mutual Wealth Management Co.	2,432	$1.28M	0.0%	-11.5%	0.003%
8/20/2026	Wedbush Securities Inc.	3,205	$1.69M	0.0%	+5.5%	0.004%
8/20/2026	Greenleaf Trust	1,662	$0.88M	0.0%	+13.7%	0.002%
8/19/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	911,489	$479.84M	0.1%	+4.6%	1.157%
8/19/2026	New Mexico Educational Retirement Board	3,950	$2.08M	0.1%	+8.2%	0.005%
8/19/2026	Royal London Asset Management Ltd.	50,714	$26.70M	0.0%	-0.6%	0.064%
8/19/2026	Mufg Securities Americas Inc.	2,376	$1.25M	0.1%	+7.5%	0.003%
8/19/2026	Van ECK Associates Corp	24,601	$12.95M	0.0%	-7.9%	0.031%
8/19/2026	Northstar Asset Management Inc.	11,901	$6.27M	1.8%	-6.2%	0.015%
8/19/2026	Nissay Asset Management Corp Japan	23,713	$12.48M	0.1%	+4.7%	0.030%
8/19/2026	Wellington Management Group LLP	726,695	$382.56M	0.1%	-1.2%	0.922%
8/18/2026	Pin Oak Investment Advisors Inc.	93	$49K	0.0%	N/A	0.000%
8/18/2026	Livforsakringsbolaget Skandia Omsesidigt	400	$0.21M	0.0%	N/A	0.001%
8/18/2026	Public Employees Retirement System of Ohio	28,050	$14.77M	0.0%	N/A	0.036%
8/15/2026	American Capital Management Inc.	162,110	$85.34M	3.8%	N/A	0.206%
8/15/2026	First Bancorp Inc ME	950	$0.50M	0.2%	N/A	0.001%
8/14/2026	Ancora Advisors LLC	835	$0.44M	0.0%	N/A	0.001%
8/13/2026	Barbara Oil Co.	5,245	$2.81M	0.9%	N/A	0.007%
8/11/2026	TrinityBridge Ltd	363	$0.19M	0.0%	N/A	0.000%
8/10/2026	Flossbach Von Storch SE	17,270	$9.09M	0.0%	N/A	0.022%
8/10/2026	Great Lakes Advisors LLC	3,991	$2.10M	0.0%	N/A	0.005%
8/10/2026	Danske Bank A S	47,185	$24.84M	0.0%	N/A	0.060%
8/7/2026	Commerzbank Aktiengesellschaft FI	647	$0.34M	0.0%	N/A	0.001%
8/7/2026	Plato Investment Management Ltd	2,836	$1.48M	0.1%	N/A	0.004%
8/6/2026	J.Safra Asset Management Corp	48	$25K	0.0%	N/A	0.000%
8/6/2026	Bank of New York Mellon Corp	1,193,343	$628.22M	0.1%	N/A	1.513%
8/6/2026	S&CO Inc.	500	$0.26M	0.0%	N/A	0.001%
8/3/2026	Beacon Bank & Trust	1,082	$0.57M	0.1%	-6.3%	0.001%
7/10/2026	Tema ETFs LLC	3,934	$2.07M	0.1%	-1.6%	0.005%
7/10/2026	Haven Capital Group Inc.	11,492	$6.05M	5.0%	-5.3%	0.015%
7/10/2026	Generali Investments Management Co LLC	902	$0.48M	0.1%	+40.9%	0.001%
7/10/2026	E. Ohman J or Asset Management AB	3,911	$2.06M	0.0%	+11.1%	0.005%
7/10/2026	Handelsbanken Fonder AB	38,344	$20.19M	0.1%	+5.9%	0.049%
7/10/2026	City Holding Co.	817	$0.43M	0.0%	-22.9%	0.001%
7/10/2026	Salvus Wealth Management LLC	627	$0.33M	0.2%	-12.7%	0.001%
7/9/2026	Revolve Wealth Partners LLC	963	$0.51M	0.1%	+7.6%	0.001%
7/9/2026	Franklin Street Advisors Inc. NC	26,215	$13.80M	0.8%	-2.0%	0.033%
7/9/2026	Legacy Wealth Asset Management LLC	488	$0.26M	0.1%	+29.8%	0.001%
7/9/2026	Birchbrook Inc.	4,477	$2.36M	1.1%	-0.8%	0.006%
7/9/2026	Everhart Financial Group Inc.	1,939	$1.02M	0.1%	-5.4%	0.002%
7/9/2026	Sax Wealth Advisors LLC	2,354	$1.32M	0.0%	+97.6%	0.003%
7/9/2026	Pine Haven Investment Counsel Inc	1,388	$0.73M	0.5%	+4.8%	0.002%
7/9/2026	Valeo Financial Advisors LLC	383	$0.20M	0.0%	+6.4%	0.000%
7/9/2026	Seilern Investment Management Ltd	97,560	$51.36M	6.5%	+20.7%	0.124%
7/9/2026	Norway Savings Bank	4,919	$2.59M	1.1%	+5.6%	0.006%
7/8/2026	Beacon Bank & Trust	1,082	$0.57M	0.1%	-6.3%	0.001%
7/8/2026	Beacon Investment Advisory Services Inc.	55,153	$29.04M	1.1%	-6.2%	0.070%

Data available starting January 2016

IDEXX Laboratories, Inc. develops, manufactures, and distributes products primarily for the companion animal veterinary, livestock and poultry, dairy, and water testing markets in Africa, the Asia Pacific, Canada, Europe, Latin America, and internationally. The company operates through three segments: Companion Animal Group; Water Quality Products; and Livestock, Poultry and Dairy. It also provides point-of-care veterinary diagnostic products, including instruments, consumables, and rapid assay test kits; veterinary reference laboratory diagnostic and consulting services; practice management and diagnostic imaging systems and services for veterinarians; and health monitoring, biological materials testing, and laboratory diagnostic instruments, and services for biomedical research community. In addition, the company offers diagnostic and health-monitoring products for livestock, poultry, and dairy; products that test water for various microbiological contaminants; point-of-care electrolytes and blood gas analyzers; in-clinic chemistry, blood and urine chemistry, hematology, immunoassay, urinalysis, and coagulation analyzers; and SNAP rapid assays test kits. Further, it provides Colilert, Colilert-18, and Colisure tests, which detect the presence of total coliforms and E. coli in water; Enterolert, Pseudalert, Filta-Max and Filta-Max xpress, Legiolert, and Quanti-Tray products; and veterinary software and services for independent veterinary clinics and corporate groups. Additionally, the company offers human medical point-of-care products and laboratory diagnostics services. The company markets its products through marketing, customer service, sales, and technical service groups, as well as through independent distributors and other resellers. IDEXX Laboratories, Inc. was incorporated in 1983 and is headquartered in Westbrook, Maine.

Today's Range

Now: $506.48

$501.98

$514.37

50 Day Range

MA: $551.41

$504.70

$595.76

52 Week Range

Now: $506.48

$500.61

$769.98

Volume

459,795 shs

Average Volume

574,415 shs

Market Capitalization

$39.90 billion

P/E Ratio

35.62

Dividend Yield

N/A

Beta

1.54

Who are the company insiders with the largest holdings of IDEXX Laboratories?: IDEXX Laboratories' top insider investors include:
Jonathan W Ayers (CEO)
Jonathan W Ayers (Chairman)
Jonathan W Ayers (Insider)
Jonathan W Ayers (Director)
Daniel M Junius (Director)
Jonathan Jay Mazelsky (CEO)
William T End (Director)
Brian P Mckeon (CFO)
Brian P Mckeon (VP)
Michael J Phd Williams (EVP)
Learn More about top insider investors at IDEXX Laboratories.
Who are the major institutional investors of IDEXX Laboratories?: IDEXX Laboratories' top institutional shareholders include:
Bank of New York Mellon Corp — 1.51%
Fundsmith LLP — 1.29%
UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC — 1.16%
Wellington Management Group LLP — 0.92%
Amundi — 0.72%
Alyeska Investment Group L.P. — 0.51%
Learn More about top institutional investors of IDEXX Laboratories stock.
Which institutional investors are selling IDEXX Laboratories stock?: During the previous quarter, IDXX stock was sold by these institutional investors:
Fundsmith LLP
Railway Pension Investments Ltd
Amundi
Tidal Investments LLC
Azimuth Capital Investment Management LLC
Corient Private Wealth LP
Wellington Management Group LLP
Baird Financial Group Inc.
During the previous year, company insiders that have sold IDEXX Laboratories company stock include:
Jonathan Jay Mazelsky (CEO)
Nimrata Hunt (EVP)
Michael G Erickson (EVP)
George Fennell (EVP)
Lawrence D Kingsley (Director)
Sophie V Vandebroek (Director)
Learn More investors selling IDEXX Laboratories stock.
Which institutional investors are buying IDEXX Laboratories stock?: In the last quarter, IDXX stock was purchased by institutional investors including:
Bank of New York Mellon Corp
Alyeska Investment Group L.P.
American Capital Management Inc.
Assenagon Asset Management S.A.
VIRGINIA RETIREMENT SYSTEMS ET Al
Danske Bank A S
UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Nykredit A S