DF DENT & CO INC

Position in IDXX — Idexx Laboratories Inc /De

CIK 934999 BALTIMORE, MD

Position in IDXX

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$22,488,523

-$6,221,380 QoQ

Shares Held

40,023

-5.7% QoQ

Ownership

0.051%

of shares outstanding

% of Portfolio

0.43%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

DF DENT & CO INC holds $121,544,151 across 5 Diagnostics & Research names.

#	Ticker	Company	Shares	Value (USD)
1	DHR	Danaher Corp /De/	368,898	$70,267,691
2	MTD	Mettler Toledo International Inc/	21,280	$27,185,412
3	TMO	Thermo Fisher Scientific Inc.	45,263	$22,693,057
4	LH	Labcorp Holdings Inc.	3,308	$926,240
5	ILMN	Illumina, Inc.	2,683	$471,751

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$22,488,523	40,023	-5.7%	Shares	Sole	2026-05-15
2025-12-31	$28,709,903	42,437	-4.5%	Shares	Sole	2026-02-17
2025-09-30	$28,396,743	44,447	-3.8%	Shares	Sole	2025-11-14
2025-06-30	$24,787,489	46,216	-14.9%	Shares	Sole	2025-08-14
2025-03-31	$22,810,844	54,318	+2.0%	Shares	Sole	2025-05-15
2024-12-31	$22,024,775	53,272	-1.7%	Shares	Sole	2025-02-12
2024-09-30	$27,389,491	54,213	-2.5%	Shares	Sole	2024-11-15
2024-06-30	$27,087,832	55,599	-1.2%	Shares	Sole	2024-08-14
2024-03-31	$30,387,800	56,281	-2.3%	Shares	Sole	2024-05-15
2023-12-31	$31,972,545	57,603	-2.8%	Shares	Sole	2024-02-14
2023-09-30	$25,916,992	59,270	-18.0%	Shares	Sole	2023-11-14
2023-06-30	$36,317,255	72,312	-41.3%	Shares	Sole	2023-08-14
2023-03-31	$61,611,856	123,204	-18.7%	Shares	Sole	2023-05-15
2022-12-31	$61,838,168	151,579	-49.2%	Shares	Sole	2023-02-15
2022-09-30	$97,265,309	298,543	-1.3%	Shares	Sole	2022-11-14
2022-06-30	$106,095,474	302,499	+40.0%	Shares	Sole	2022-08-15
2022-03-31	$118,224,589	216,109	+0.4%	Shares	Sole	2022-05-16
2021-12-31	$141,674,253	215,160	-5.4%	Shares	Sole	2022-02-14
2021-09-30	$141,381,502	227,338	-11.3%	Shares	Sole	2021-11-15
2021-06-30	$161,916,789	256,380	-1.1%	Shares	Sole	2021-08-16
2021-03-31	$126,839,427	259,221	+0.3%	Shares	Sole	2021-05-17
2020-12-31	$129,248,886	258,565	+1.6%	Shares	Sole	2021-02-16
2020-09-30	$100,069,688	254,559	+4.4%	Shares	Sole	2020-11-16
2020-06-30	$80,533,947	243,924	+57.6%	Shares	Sole	2020-08-14
2020-03-31	$37,486,882	154,751	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.