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

^$551.21

▼ -24.77 (-4.30%)

As of 10/30/2026 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
10/31/2026	Boston Trust Walden Corp	9,217	$4.81M	0.0%	-10.8%	0.012%
10/31/2026	Chicago Partners Investment Group LLC	1,983	$1.11M	0.0%	+34.3%	0.003%
10/31/2026	Ascent Group LLC	804	$0.42M	0.0%	+3.9%	0.001%
10/31/2026	Kelleher Financial Advisors	882	$0.46M	0.1%	-15.4%	0.001%
10/30/2026	Rakuten Investment Management Inc.	20,981	$11.19M	0.0%	+10.2%	0.027%
10/30/2026	Third View Private Wealth LLC	999	$0.52M	0.1%	-39.7%	0.001%
10/30/2026	TrinityBridge Ltd	313	$0.16M	0.0%	N/A	0.000%
10/30/2026	Lyell Wealth Management LP	22,028	$11.50M	0.7%	-2.8%	0.028%
10/30/2026	Oregon Public Employees Retirement Fund	9,703	$5.07M	0.1%	-0.6%	0.012%
10/30/2026	Factory Mutual Insurance Co.	41,230	$21.53M	0.2%	-9.8%	0.052%
10/30/2026	Aware Super Pty Ltd as trustee of Aware Super	74,577	$38.94M	0.5%	+26.1%	0.095%
10/30/2026	Legacy Wealth Management LLC MS	916	$0.48M	0.1%	N/A	0.001%
10/30/2026	Eads & Heald Wealth Management	2,450	$1.28M	0.6%	-3.2%	0.003%
10/30/2026	Gerber Kawasaki Wealth & Investment Management	572	$0.30M	0.0%	+21.7%	0.001%
10/30/2026	Greenfield Seitz Capital Management LLC	4,925	$2.57M	0.7%	+1.2%	0.006%
10/30/2026	Keeler Thomas Management LLC	1,771	$0.93M	0.4%	N/A	0.002%
10/29/2026	Cortland Associates Inc. MO	4,969	$2.60M	0.4%	-3.5%	0.006%
10/29/2026	Salomon & Ludwin LLC	83	$43K	0.0%	-41.5%	0.000%
10/29/2026	Bank Julius Baer & Co. Ltd Zurich	122,075	$64.03M	0.2%	-0.6%	0.155%
10/29/2026	Greenleaf Trust	1,311	$0.69M	0.0%	-21.1%	0.002%
10/29/2026	Bell Investment Advisors Inc	64	$33K	0.0%	+45.5%	0.000%
10/29/2026	Sumitomo Mitsui Trust Group Inc.	189,012	$98.70M	0.1%	-3.7%	0.240%
10/29/2026	Mirae Asset Global Investments Co. Ltd.	58,225	$30.41M	0.1%	N/A	0.074%
10/29/2026	Profund Advisors LLC	5,935	$3.10M	0.1%	-6.8%	0.008%
10/29/2026	ProShare Advisors LLC	97,635	$50.98M	0.1%	+3.8%	0.124%
10/29/2026	Vise Technologies Inc.	2,267	$1.18M	0.0%	-7.1%	0.003%
10/29/2026	Moss Adams Wealth Advisors LLC	548	$0.29M	0.0%	-4.0%	0.001%
10/29/2026	Coyle Financial Counsel LLC	414	$0.22M	0.0%	-5.7%	0.001%
10/29/2026	MGO One Seven LLC	5,566	$2.91M	0.0%	+288.1%	0.007%
10/29/2026	Americana Partners LLC	3,723	$1.94M	0.0%	-45.6%	0.005%
10/28/2026	CFC Planning Co LLC	2,953	$1.54M	0.8%	+24.7%	0.004%
10/28/2026	International Assets Investment Management LLC	234,274	$122.34M	0.9%	+30,484.1%	0.297%
10/28/2026	CHICAGO TRUST Co NA	5,743	$3M	0.4%	-1.2%	0.007%
10/28/2026	Glenview Trust Co	18,003	$9.40M	0.1%	-17.1%	0.023%
10/28/2026	Outlook Wealth Advisors LLC	550	$0.29M	0.1%	-13.0%	0.001%
10/28/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	126,164	$65.88M	0.4%	+36.8%	0.160%
10/28/2026	Choreo LLC	1,866	$0.98M	0.0%	-12.2%	0.002%
10/28/2026	Crystal Rock Capital Management	11,275	$5.89M	3.1%	+6.4%	0.014%
10/28/2026	China Universal Asset Management Co. Ltd.	3,015	$1.61M	0.1%	+10.2%	0.004%
10/28/2026	Childress Capital Advisors LLC	3,167	$1.65M	0.3%	-3.4%	0.004%
10/28/2026	D.A. Davidson & CO.	3,277	$1.71M	0.0%	-1.9%	0.004%
10/28/2026	BOKF NA	3,453	$1.80M	0.0%	+9.1%	0.000%
10/28/2026	Motley Fool Asset Management LLC	6,988	$3.65M	0.1%	+1.2%	0.000%
10/28/2026	LaFleur & Godfrey LLC	7,733	$4.04M	0.5%	-6.1%	0.000%
10/28/2026	Pinnacle Wealth Planning Services Inc.	516	$0.27M	0.0%	-59.3%	0.000%
10/28/2026	North Dakota State Investment Board	2,421	$1.26M	0.0%	+2.2%	0.000%
10/28/2026	VestGen Advisors LLC	988	$0.52M	0.0%	-9.5%	0.000%
10/28/2026	Beacon Bank & Trust	906	$0.47M	0.1%	-16.3%	0.000%
10/28/2026	Vantage Investment Partners LLC	51,766	$27.03M	1.6%	-3.9%	0.000%
10/27/2026	Generali Asset Management SPA SGR	6,031	$3.15M	0.1%	+2.9%	0.008%
10/27/2026	Asset Management One Co. Ltd.	56,376	$29.44M	0.1%	+2.9%	0.072%
10/26/2026	Penobscot Investment Management Company Inc.	655	$0.34M	0.0%	-7.1%	0.001%
10/26/2026	Oppenheimer & Co. Inc.	3,137	$1.64M	0.0%	+4.8%	0.004%
10/26/2026	Park Avenue Securities LLC	2,089	$1.09M	0.0%	-10.0%	0.003%
10/26/2026	Verdence Capital Advisors LLC	3,721	$1.94M	0.1%	-22.6%	0.005%
10/24/2026	Apollon Wealth Management LLC	3,799	$1.98M	0.0%	-35.3%	0.005%
10/24/2026	Loring Wolcott & Coolidge Fiduciary Advisors LLP MA	114,834	$59.97M	0.6%	-2.0%	0.146%
10/24/2026	Aries Wealth Management	3,199	$1.67M	0.3%	N/A	0.004%
10/24/2026	Live Oak Investment Partners	2,516	$1.31M	0.7%	+1.5%	0.003%
10/24/2026	Revolve Wealth Partners LLC	898	$0.47M	0.0%	-6.7%	0.001%
10/23/2026	Signaturefd LLC	1,964	$1.03M	0.0%	+21.4%	0.002%
10/23/2026	Citizens Financial Group Inc. RI	3,400	$1.78M	0.0%	+51.1%	0.004%
10/23/2026	Middleton & Co. Inc. MA	12,929	$6.75M	0.7%	-1.7%	0.016%
10/23/2026	Sowell Financial Services LLC	530	$0.28M	0.0%	-4.0%	0.001%
10/23/2026	One Wealth Capital Management LLC	1,339	$0.70M	0.3%	N/A	0.002%
10/23/2026	Taylor Frigon Capital Management LLC	4,421	$2.31M	1.2%	-1.8%	0.006%
10/23/2026	Evergreen Capital Management LLC	749	$0.39M	0.0%	-44.7%	0.001%
10/23/2026	Mascoma Wealth Management LLC	170	$89K	0.0%	+41.7%	0.000%
10/23/2026	Barrett & Company Inc.	675	$0.35M	0.1%	-6.9%	0.001%
10/23/2026	Fifth Third Wealth Advisors LLC	1,008	$0.53M	0.0%	+4.0%	0.001%
10/23/2026	Sterling Capital Management LLC	2,523	$1.32M	0.0%	-35.3%	0.003%
10/23/2026	Inspire Investing LLC	17,533	$9.16M	0.4%	-4.4%	0.022%
10/23/2026	Carderock Capital Management Inc.	16,609	$8.67M	2.1%	-0.1%	0.021%
10/22/2026	Yousif Capital Management LLC	10,685	$5.58M	0.1%	+2.1%	0.014%
10/22/2026	BIP Wealth LLC	1,286	$0.67M	0.0%	+2.2%	0.002%
10/22/2026	Robinson Smith Wealth Advisors LLC	1,969	$1.03M	0.6%	N/A	0.002%
10/22/2026	Titan Investment Management LLC	4,205	$2.20M	1.6%	+56.0%	0.005%
10/22/2026	Howland Capital Management LLC	47,172	$24.63M	0.9%	+0.8%	0.060%
10/22/2026	NBT Bank N.A.	536	$0.28M	0.0%	N/A	0.001%
10/22/2026	Root Financial Partners LLC	138	$72K	0.0%	N/A	0.000%
10/22/2026	Obermeyer Wealth Partners	1,898	$0.99M	0.0%	-1.3%	0.002%
10/22/2026	Cardinal Capital Management	14,949	$7.81M	0.9%	+5.6%	0.019%
10/21/2026	Axxcess Wealth Management LLC	964	$0.50M	0.0%	-12.0%	0.001%
10/21/2026	Crossmark Global Holdings Inc.	7,177	$3.75M	0.0%	+2.2%	0.009%
10/21/2026	Sowell Financial Services LLC	530	$0.28M	0.0%	-4.0%	0.001%
10/21/2026	Quadrant Capital Group LLC	2,052	$1.07M	0.0%	+1.9%	0.003%
10/21/2026	Pinnacle Associates Ltd.	1,061	$0.55M	0.0%	-2.6%	0.001%
10/21/2026	Nisa Investment Advisors LLC	35,018	$18.29M	0.1%	-0.6%	0.044%
10/21/2026	Robeco Institutional Asset Management B.V.	106,831	$55.79M	0.1%	-38.0%	0.136%
10/21/2026	Diversify Advisory Services LLC	4,346	$2.38M	0.0%	+39.7%	0.006%
10/20/2026	Robinson Value Management Ltd.	5,112	$2.67M	1.5%	-4.9%	0.006%
10/20/2026	Prime Capital Investment Advisors LLC	3,873	$2.02M	0.0%	N/A	0.005%
10/20/2026	Norway Savings Bank	4,889	$2.55M	1.0%	-0.6%	0.006%
10/20/2026	Net Worth Advisory Group	482	$0.25M	0.1%	+17.0%	0.001%
10/20/2026	Sumitomo Mitsui DS Asset Management Company Ltd	12,042	$6.29M	0.0%	-0.2%	0.015%
10/20/2026	CWA Asset Management Group LLC	446	$0.23M	0.0%	-30.1%	0.001%
10/20/2026	Arlington Financial Advisors LLC	644	$0.34M	0.0%	N/A	0.001%
10/19/2026	BDF Gestion	3,198	$1.67M	0.2%	N/A	0.004%
10/17/2026	IFP Advisors Inc	614	$0.32M	0.0%	+5.0%	0.001%
10/17/2026	Frank Rimerman Advisors LLC	517	$0.27M	0.0%	-9.8%	0.001%

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: $551.21

$540.61

$586.00

50 Day Range

MA: $534.27

$504.70

$575.98

52 Week Range

Now: $551.21

$500.61

$769.98

Volume

1,173,470 shs

Average Volume

562,145 shs

Market Capitalization

$43.42 billion

P/E Ratio

38.76

Dividend Yield

N/A

Beta

1.55

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:
Montrusco Bolton Investments Inc. — 0.40%
Assenagon Asset Management S.A. — 0.33%
International Assets Investment Management LLC — 0.30%
Sumitomo Mitsui Trust Group Inc. — 0.24%
Congress Asset Management Co. — 0.22%
Vontobel Holding Ltd. — 0.16%
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:
Curated Wealth Partners LLC
Robeco Institutional Asset Management B.V.
Vontobel Holding Ltd.
Montrusco Bolton Investments Inc.
Congress Asset Management Co.
Sumitomo Mitsui Trust Group Inc.
First Citizens Bank & Trust Co.
Factory Mutual Insurance Co.
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:
International Assets Investment Management LLC
Assenagon Asset Management S.A.
Mirae Asset Global Investments Co. Ltd.
VIRGINIA RETIREMENT SYSTEMS ET Al
Aware Super Pty Ltd as trustee of Aware Super
WoodTrust Financial Corp
Bell Asset Management Ltd
MGO One Seven LLC