Tsai Capital’s Idexx Laboratories IDXX Stock Holding History

Tsai Capital’s Portfolio IDXX Stock Details IDXX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$2.69M	Buy	4,782 +104	+2%	+$66.7K	2%	15
2025 Q4	$3.16M	Buy	4,678 +36	+0.8%	+$24.5K	2.15%	16
2025 Q3	$2.97M	Buy	4,642 +2	+0%	+$1.21K	2.07%	18
2025 Q2	$2.49M	Sell	4,640 -4,585	-50%	-$2.19M	1.82%	22
2025 Q1	$3.87M	Buy	9,225 +428	+5%	+$186K	3.19%	9
2024 Q4	$3.64M	Buy	8,797 +3,016	+52%	+$1.32M	2.65%	12
2024 Q3	$2.92M	Buy	5,781 +654	+13%	+$318K	2.37%	17
2024 Q2	$2.5M	Hold	5,127	–	–	2.46%	15
2024 Q1	$2.77M	Sell	5,127 -158	-3%	-$86.3K	2.85%	12
2023 Q4	$2.93M	Sell	5,285 -347	-6%	-$163K	2.69%	11
2023 Q3	$2.46M	Hold	5,632	–	–	2.35%	13
2023 Q2	$2.83M	Buy	5,632 +140	+3%	+$67.1K	2.57%	11
2023 Q1	$2.75M	Sell	5,492 -1,116	-17%	-$534K	2.89%	10
2022 Q4	$2.7M	Sell	6,608 -471	-7%	-$183K	3.9%	8
2022 Q3	$2.31M	Hold	7,079	–	–	2.56%	13
2022 Q2	$2.48M	Buy	+7,079	New	+$2.89M	2.95%	10

Other funds holding IDXX

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return

Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return

Fundsmith LLP London, United Kingdom $12.8B AUM 6.9% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Tsai Capital's IDXX Position: Q1 2026 in Review

Tsai Capital increased its Idexx Laboratories (IDXX) stake by 2.2% in Q1 2026, buying an estimated $66.7K and bringing the position to 4,782 shares worth $2.69M. The position accounts for 2% of the portfolio, ranked #15.

Tsai Capital first reported a position in IDXX in Q2 2022 and has held it in 16 quarters since. The position peaked at $3.87M in Q1 2025. 1,312 funds tracked by Wall St. Rank hold IDXX as of Q1 2026.

Tsai Capital held 4,782 shares of Idexx Laboratories worth $2.69M as of Q1 2026.
Tsai Capital bought 104 Idexx Laboratories shares in Q1 2026, an estimated $66.7K.
Idexx Laboratories made up 2% of Tsai Capital's portfolio in Q1 2026, its #15 holding.
Tsai Capital first reported a position in Idexx Laboratories in Q2 2022 and has held it in 16 quarters since.
Tsai Capital's Idexx Laboratories position peaked at $3.87M in Q1 2025.
1,312 funds tracked by Wall St. Rank held Idexx Laboratories as of Q1 2026.

Based on Tsai Capital's 13F filing for Q1 2026, filed 14 May 2026.