CONGRESS ASSET MANAGEMENT CO

Position in IDXX — Idexx Laboratories Inc /De

CIK 897378 BOSTON, MA

Position in IDXX

as of Jun 30, 2026 · filed Jul 7, 2026 Compact

Position Value

$100,125,202

+$6,466,006 QoQ

Shares Held

190,193

+14.1% QoQ

Ownership

0.241%

of shares outstanding

% of Portfolio

0.62%

of 13F equity value

Holder Rank

of 109 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 82.70546234614314.ToString("F0")% Shared 9.474060559536891.ToString("F0")% None 7.820477094319981.ToString("F0")%

Healthcare · as of Jun 30, 2026

CONGRESS ASSET MANAGEMENT CO holds $135,344,121 across 3 Diagnostics & Research names. IDXX ranks #1 (74.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	IDXX	Idexx Laboratories Inc /De This page	190,193	$100,125,202
2	MEDP	Medpace Holdings, Inc.	58,479	$30,969,893
3	TMO	Thermo Fisher Scientific Inc.	8,475	$4,249,026

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$100,125,202	190,193	+14.1%	Shares	Sole	2026-07-07
2026-03-31	$93,659,196	166,686	+8.3%	Shares	Sole	2026-04-14
2025-12-31	$104,123,379	153,908	+9894.0%	Shares	Sole	2026-01-09
2025-09-30	$983,890	1,540	-39.0%	Shares	Sole	2025-10-10
2025-06-30	$1,353,722	2,524	-1.7%	Shares	Sole	2025-07-16
2025-03-31	$1,078,011	2,567	-12.4%	Shares	Sole	2025-04-11
2024-12-31	$1,212,206	2,932	-29.7%	Shares	Sole	2025-01-30
2024-09-30	$2,105,756	4,168	-4.4%	Shares	Sole	2024-10-28
2024-06-30	$2,124,679	4,361	-3.1%	Shares	Sole	2024-08-02
2024-03-31	$2,429,145	4,499	-1.6%	Shares	Sole	2024-04-11
2023-12-31	$2,537,133	4,571	-12.3%	Shares	Sole	2024-03-04
2023-09-30	$2,279,051	5,212	-6.4%	Shares	Sole	2023-11-01
2023-06-30	$2,795,914	5,567	+0.8%	Shares	Sole	2023-07-27
2023-03-31	$2,760,941	5,521	+8.0%	Shares	Sole	2023-04-21
2022-12-31	$2,085,083	5,111	+31.2%	Shares	Sole	2023-01-18
2022-09-30	$1,269,642	3,897	-61.1%	Shares	Sole	2022-11-08
2022-06-30	$3,510,105	10,008	+14.2%	Shares	Sole	2022-08-02
2022-03-31	$4,796,075	8,767	-38.4%	Shares	Sole	2022-04-20
2021-12-31	$9,371,861	14,233	-33.6%	Shares	Sole	2022-01-28
2021-09-30	$13,321,719	21,421	-90.3%	Shares	Sole	2021-11-08
2021-06-30	$139,952,111	221,601	-0.8%	Shares	Sole	2021-08-05
2021-03-31	$109,311,364	223,399	-1.8%	Shares	Sole	2021-05-05
2020-12-31	$113,728,922	227,517	-4.1%	Shares	Sole	2021-01-26
2020-09-30	$93,286,575	237,304	-0.2%	Shares	Sole	2020-11-03
2020-06-30	$78,532,517	237,862	+7.1%	Shares	Sole	2020-07-23
2020-03-31	$53,790,118	222,053	—	Shares	Sole	2020-04-21
No filing history on record for this holder in this stock.