Grantham, Mayo, Van Otterloo & Co (GMO)’s Idexx Laboratories IDXX Stock Holding History

Grantham, Mayo, Van Otterloo & Co (GMO)’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	$1.47M	Buy	2,613 +623	+31%	+$399K	﹤0.01%	466
2025 Q4	$1.35M	Buy	1,990 +505	+34%	+$344K	﹤0.01%	461
2025 Q3	$949K	Buy	+1,485	New	+$901K	﹤0.01%	490
2015 Q3	–	Sell	-58,800	Closed	-$3.77M	–	579
2015 Q2	$3.77M	Hold	58,800	–	–	0.01%	279
2015 Q1	$4.54M	Sell	58,800 -24,800	-30%	-$1.93M	0.01%	273
2014 Q4	$6.2M	Sell	83,600 -17,212	-17%	-$1.21M	0.02%	238
2014 Q3	$5.94M	Buy	100,812 +49,612	+97%	+$3.14M	0.02%	252
2014 Q2	$3.42M	Sell	51,200 -2,200	-4%	-$140K	0.01%	326
2014 Q1	$3.24M	Sell	53,400 -21,446	-29%	-$1.28M	0.01%	353
2013 Q4	$3.98M	Sell	74,846 -4,934	-6%	-$260K	0.01%	343
2013 Q3	$3.98M	Sell	79,780 -13,600	-15%	-$654K	0.01%	347
2013 Q2	$4.19M	Buy	+93,380	New	+$4.08M	0.01%	331

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

Grantham, Mayo, Van Otterloo & Co (GMO)'s IDXX Position: Q1 2026 in Review

Grantham, Mayo, Van Otterloo & Co (GMO) increased its Idexx Laboratories (IDXX) stake by 31% in Q1 2026, buying an estimated $399K and bringing the position to 2,613 shares worth $1.47M. The position accounts for ﹤0.01% of the portfolio, ranked #466.

Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in IDXX in Q2 2013 and has held it in 12 quarters since. The position peaked at $6.2M in Q4 2014. 1,311 funds tracked by Wall St. Rank hold IDXX as of Q1 2026.

Grantham, Mayo, Van Otterloo & Co (GMO) held 2,613 shares of Idexx Laboratories worth $1.47M as of Q1 2026.
Grantham, Mayo, Van Otterloo & Co (GMO) bought 623 Idexx Laboratories shares in Q1 2026, an estimated $399K.
Idexx Laboratories made up ﹤0.01% of Grantham, Mayo, Van Otterloo & Co (GMO)'s portfolio in Q1 2026, its #466 holding.
Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in Idexx Laboratories in Q2 2013 and has held it in 12 quarters since.
Grantham, Mayo, Van Otterloo & Co (GMO)'s Idexx Laboratories position peaked at $6.2M in Q4 2014.
1,311 funds tracked by Wall St. Rank held Idexx Laboratories as of Q1 2026.

Based on Grantham, Mayo, Van Otterloo & Co (GMO)'s 13F filing for Q1 2026, filed 14 May 2026.