IDEXX LABS INC

Ticker: IDXX CUSIP: 45168D104 Class: COM

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 441,324 Value ($000) $298,569 Avg Close $681.02 Range $600.57 - $769.98

Q3 2025

Shares 459,019 Value ($000) $293,263 Avg Close $606.98 Range $506.91 - $688.12

Q2 2025

Shares 685,088 Value ($000) $367,440 Avg Close $478.19 Range $356.14 - $537.47

Q1 2025

Shares 637,111 Value ($000) $267,555 Avg Close $434.21 Range $404.60 - $474.67

Q4 2024

Shares 422,133 Value ($000) $174,527 Avg Close $438.63 Range $398.50 - $505.52

Q3 2024

Shares 52,662 Value ($000) $26,606 Avg Close $485.80 Range $446.28 - $530.60

Q2 2024

Shares 67,121 Value ($000) $32,701 Avg Close $502.03 Range $462.00 - $548.88

Q1 2024

Shares 69,028 Value ($000) $37,270 Avg Close $546.49 Range $507.61 - $583.39

Q4 2023

Shares 68,329 Value ($000) $37,926 Avg Close $469.47 Range $372.50 - $568.30

Q3 2023

Shares 67,135 Value ($000) $29,356 Avg Close $498.67 Range $430.81 - $564.74

Q2 2023

Shares 75,041 Value ($000) $37,688 Avg Close $479.21 Range $446.00 - $506.56

Q1 2023

Shares 75,320 Value ($000) $37,666 Avg Close $478.56 Range $399.27 - $515.79

Q4 2022

Shares 77,699 Value ($000) $31,698 Avg Close $388.17 Range $317.06 - $448.01

Q3 2022

Shares 107,646 Value ($000) $35,071 Avg Close $367.34 Range $321.79 - $417.77

Q2 2022

Shares 110,602 Value ($000) $38,791 Avg Close $407.78 Range $318.50 - $558.01

Q1 2022

Shares 116,429 Value ($000) $63,694 Avg Close $526.03 Range $460.36 - $656.31

Q4 2021

Shares 123,988 Value ($000) $81,641 Avg Close $627.75 Range $575.59 - $672.93

Q3 2021

Shares 121,787 Value ($000) $75,739 Avg Close $671.94 Range $620.86 - $706.95

Q2 2021

Shares 123,182 Value ($000) $77,796 Avg Close $552.18 Range $482.90 - $639.65

Q1 2021

Shares 95,238 Value ($000) $46,601 Avg Close $501.01 Range $455.23 - $573.99

Q4 2020

Shares 109,441 Value ($000) $54,706 Avg Close $447.44 Range $382.68 - $503.83

Q3 2020

Shares 128,984 Value ($000) $50,705 Avg Close $369.71 Range $329.69 - $407.86

Q2 2020

Shares 144,185 Value ($000) $47,604 Avg Close $289.54 Range $226.02 - $332.68

Q1 2020

Shares 166,900 Value ($000) $40,430 Avg Close $260.97 Range $168.65 - $296.25

Q4 2019

Shares 115,122 Value ($000) $30,062 Avg Close $263.51 Range $246.74 - $294.57

Q3 2019

Shares 157,867 Value ($000) $42,929 Avg Close $278.27 Range $256.27 - $292.17

Q2 2019

Shares 183,411 Value ($000) $50,499 Avg Close $246.39 Range $214.25 - $278.61

Q1 2019

Shares 122,333 Value ($000) $27,354 Avg Close $206.43 Range $176.11 - $226.15

Q4 2018

Shares 52,745 Value ($000) $9,812 Avg Close $205.02 Range $176.15 - $252.69

Q3 2018

Shares 149,981 Value ($000) $37,444 Avg Close $242.74 Range $215.28 - $256.22

Q2 2018

Shares 149,506 Value ($000) $32,583 Avg Close $206.05 Range $183.86 - $229.01

Q1 2018

Shares 272,285 Value ($000) $52,113 Avg Close $184.56 Range $157.53 - $207.14

Q4 2017

Shares 728,725 Value ($000) $113,958 Avg Close $157.41 Range $146.09 - $168.66

Q3 2017

Shares 228,366 Value ($000) $35,509 Avg Close $158.10 Range $148.80 - $171.37

Q2 2017

Shares 443,471 Value ($000) $71,585 Avg Close $162.40 Range $153.24 - $173.01

Q1 2017

Shares 526,100 Value ($000) $81,340 Avg Close $137.84 Range $113.92 - $155.65

Q4 2016

Shares 718,039 Value ($000) $84,204 Avg Close $114.12 Range $102.45 - $121.77

Q3 2016

Shares 1,711,947 Value ($000) $192,988 Avg Close $105.39 Range $92.52 - $115.06

Q2 2016

Shares 1,932,994 Value ($000) $179,498 Avg Close $85.88 Range $76.55 - $92.87

Q1 2016

Shares 2,560,522 Value ($000) $200,540 Avg Close $72.01 Range $63.48 - $79.03

Q4 2015

Shares 2,450,857 Value ($000) $178,716 Avg Close $71.33 Range $65.03 - $77.27

Q3 2015

Shares 2,232,355 Value ($000) $165,752 Avg Close $71.63 Range $61.58 - $79.62

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	441,324	$298,569	$681.02	$600.57 - $769.98
Q3 2025	459,019	$293,263	$606.98	$506.91 - $688.12
Q2 2025	685,088	$367,440	$478.19	$356.14 - $537.47
Q1 2025	637,111	$267,555	$434.21	$404.60 - $474.67
Q4 2024	422,133	$174,527	$438.63	$398.50 - $505.52
Q3 2024	52,662	$26,606	$485.80	$446.28 - $530.60
Q2 2024	67,121	$32,701	$502.03	$462.00 - $548.88
Q1 2024	69,028	$37,270	$546.49	$507.61 - $583.39
Q4 2023	68,329	$37,926	$469.47	$372.50 - $568.30
Q3 2023	67,135	$29,356	$498.67	$430.81 - $564.74
Q2 2023	75,041	$37,688	$479.21	$446.00 - $506.56
Q1 2023	75,320	$37,666	$478.56	$399.27 - $515.79
Q4 2022	77,699	$31,698	$388.17	$317.06 - $448.01
Q3 2022	107,646	$35,071	$367.34	$321.79 - $417.77
Q2 2022	110,602	$38,791	$407.78	$318.50 - $558.01
Q1 2022	116,429	$63,694	$526.03	$460.36 - $656.31
Q4 2021	123,988	$81,641	$627.75	$575.59 - $672.93
Q3 2021	121,787	$75,739	$671.94	$620.86 - $706.95
Q2 2021	123,182	$77,796	$552.18	$482.90 - $639.65
Q1 2021	95,238	$46,601	$501.01	$455.23 - $573.99
Q4 2020	109,441	$54,706	$447.44	$382.68 - $503.83
Q3 2020	128,984	$50,705	$369.71	$329.69 - $407.86
Q2 2020	144,185	$47,604	$289.54	$226.02 - $332.68
Q1 2020	166,900	$40,430	$260.97	$168.65 - $296.25
Q4 2019	115,122	$30,062	$263.51	$246.74 - $294.57
Q3 2019	157,867	$42,929	$278.27	$256.27 - $292.17
Q2 2019	183,411	$50,499	$246.39	$214.25 - $278.61
Q1 2019	122,333	$27,354	$206.43	$176.11 - $226.15
Q4 2018	52,745	$9,812	$205.02	$176.15 - $252.69
Q3 2018	149,981	$37,444	$242.74	$215.28 - $256.22
Q2 2018	149,506	$32,583	$206.05	$183.86 - $229.01
Q1 2018	272,285	$52,113	$184.56	$157.53 - $207.14
Q4 2017	728,725	$113,958	$157.41	$146.09 - $168.66
Q3 2017	228,366	$35,509	$158.10	$148.80 - $171.37
Q2 2017	443,471	$71,585	$162.40	$153.24 - $173.01
Q1 2017	526,100	$81,340	$137.84	$113.92 - $155.65
Q4 2016	718,039	$84,204	$114.12	$102.45 - $121.77
Q3 2016	1,711,947	$192,988	$105.39	$92.52 - $115.06
Q2 2016	1,932,994	$179,498	$85.88	$76.55 - $92.87
Q1 2016	2,560,522	$200,540	$72.01	$63.48 - $79.03
Q4 2015	2,450,857	$178,716	$71.33	$65.03 - $77.27
Q3 2015	2,232,355	$165,752	$71.63	$61.58 - $79.62