IDEXX LABS INC

Ticker: IDXX CUSIP: 45168D104 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2025

Shares 147,447 Value ($000) $99,752 Avg Close $681.02 Range $600.57 - $769.98

Q3 2025

Shares 94,129 Value ($000) $60,138 Avg Close $606.98 Range $506.91 - $688.12

Q2 2024

Shares 112,602 Value ($000) $54,860 Avg Close $502.03 Range $462.00 - $548.88

Q1 2024

Shares 172,021 Value ($000) $92,879 Avg Close $546.49 Range $507.61 - $583.39

Q4 2023

Shares 161,104 Value ($000) $89,421 Avg Close $469.47 Range $372.50 - $568.30

Q3 2023

Shares 145,612 Value ($000) $63,672 Avg Close $498.67 Range $430.81 - $564.74

Q2 2023

Shares 130,079 Value ($000) $65,330 Avg Close $479.21 Range $446.00 - $506.56

Q1 2023

Shares 132,923 Value ($000) $66,472 Avg Close $478.56 Range $399.27 - $515.79

Q4 2022

Shares 221,192 Value ($000) $90,237 Avg Close $388.17 Range $317.06 - $448.01

Q3 2022

Shares 213,484 Value ($000) $69,553 Avg Close $367.34 Range $321.79 - $417.77

Q2 2022

Shares 210,765 Value ($000) $73,922 Avg Close $407.78 Range $318.50 - $558.01

Q1 2022

Shares 205,342 Value ($000) $112,334 Avg Close $526.03 Range $460.36 - $656.31

Q4 2021

Shares 128,734 Value ($000) $84,766 Avg Close $627.75 Range $575.59 - $672.93

Q3 2021

Shares 75,096 Value ($000) $46,702 Avg Close $671.94 Range $620.86 - $706.95

Q2 2021

Shares 141,576 Value ($000) $89,412 Avg Close $552.18 Range $482.90 - $639.65

Q1 2021

Shares 210,254 Value ($000) $102,879 Avg Close $501.01 Range $455.23 - $573.99

Q4 2020

Shares 239,444 Value ($000) $119,691 Avg Close $447.44 Range $382.68 - $503.83

Q3 2020

Shares 274,522 Value ($000) $107,917 Avg Close $369.71 Range $329.69 - $407.86

Q2 2020

Shares 330,676 Value ($000) $109,176 Avg Close $289.54 Range $226.02 - $332.68

Q1 2020

Shares 354,957 Value ($000) $85,985 Avg Close $260.97 Range $168.65 - $296.25

Q4 2019

Shares 333,740 Value ($000) $87,150 Avg Close $263.51 Range $246.74 - $294.57

Q3 2019

Shares 295,127 Value ($000) $80,254 Avg Close $278.27 Range $256.27 - $292.17

Q2 2019

Shares 232,800 Value ($000) $64,097 Avg Close $246.39 Range $214.25 - $278.61

Q1 2019

Shares 244,320 Value ($000) $54,630 Avg Close $206.43 Range $176.11 - $226.15

Q4 2018

Shares 246,438 Value ($000) $45,842 Avg Close $205.02 Range $176.15 - $252.69

Q3 2018

Shares 203,475 Value ($000) $50,800 Avg Close $242.74 Range $215.28 - $256.22

Q2 2018

Shares 191,373 Value ($000) $41,708 Avg Close $206.05 Range $183.86 - $229.01

Q1 2018

Shares 234,307 Value ($000) $44,844 Avg Close $184.56 Range $157.53 - $207.14

Q4 2017

Shares 138,848 Value ($000) $21,713 Avg Close $157.41 Range $146.09 - $168.66

Q2 2016

Shares 6,400 Value ($000) $594 Avg Close $85.88 Range $76.55 - $92.87

Q1 2016

Shares 6,400 Value ($000) $501 Avg Close $72.01 Range $63.48 - $79.03

Q4 2015

Shares 6,400 Value ($000) $467 Avg Close $71.33 Range $65.03 - $77.27

Q3 2015

Shares 6,400 Value ($000) $475 Avg Close $71.63 Range $61.58 - $79.62

Q2 2014

Shares 463,593 Value ($000) $61,922 Avg Close $63.58 Range $57.92 - $68.06

Q1 2014

Shares 796,456 Value ($000) $96,690 Avg Close $59.57 Range $52.32 - $64.64

Q4 2013

Shares 1,018,278 Value ($000) $108,314 Avg Close $52.63 Range $49.56 - $56.55

Q3 2013

Shares 932,870 Value ($000) $92,960 Avg Close $48.06 Range $43.99 - $50.19

Q2 2013

Shares 720,810 Value ($000) $64,649 Avg Close $43.69 Range $40.78 - $46.30

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	147,447	$99,752	$681.02	$600.57 - $769.98
Q3 2025	94,129	$60,138	$606.98	$506.91 - $688.12
Q2 2024	112,602	$54,860	$502.03	$462.00 - $548.88
Q1 2024	172,021	$92,879	$546.49	$507.61 - $583.39
Q4 2023	161,104	$89,421	$469.47	$372.50 - $568.30
Q3 2023	145,612	$63,672	$498.67	$430.81 - $564.74
Q2 2023	130,079	$65,330	$479.21	$446.00 - $506.56
Q1 2023	132,923	$66,472	$478.56	$399.27 - $515.79
Q4 2022	221,192	$90,237	$388.17	$317.06 - $448.01
Q3 2022	213,484	$69,553	$367.34	$321.79 - $417.77
Q2 2022	210,765	$73,922	$407.78	$318.50 - $558.01
Q1 2022	205,342	$112,334	$526.03	$460.36 - $656.31
Q4 2021	128,734	$84,766	$627.75	$575.59 - $672.93
Q3 2021	75,096	$46,702	$671.94	$620.86 - $706.95
Q2 2021	141,576	$89,412	$552.18	$482.90 - $639.65
Q1 2021	210,254	$102,879	$501.01	$455.23 - $573.99
Q4 2020	239,444	$119,691	$447.44	$382.68 - $503.83
Q3 2020	274,522	$107,917	$369.71	$329.69 - $407.86
Q2 2020	330,676	$109,176	$289.54	$226.02 - $332.68
Q1 2020	354,957	$85,985	$260.97	$168.65 - $296.25
Q4 2019	333,740	$87,150	$263.51	$246.74 - $294.57
Q3 2019	295,127	$80,254	$278.27	$256.27 - $292.17
Q2 2019	232,800	$64,097	$246.39	$214.25 - $278.61
Q1 2019	244,320	$54,630	$206.43	$176.11 - $226.15
Q4 2018	246,438	$45,842	$205.02	$176.15 - $252.69
Q3 2018	203,475	$50,800	$242.74	$215.28 - $256.22
Q2 2018	191,373	$41,708	$206.05	$183.86 - $229.01
Q1 2018	234,307	$44,844	$184.56	$157.53 - $207.14
Q4 2017	138,848	$21,713	$157.41	$146.09 - $168.66
Q2 2016	6,400	$594	$85.88	$76.55 - $92.87
Q1 2016	6,400	$501	$72.01	$63.48 - $79.03
Q4 2015	6,400	$467	$71.33	$65.03 - $77.27
Q3 2015	6,400	$475	$71.63	$61.58 - $79.62
Q2 2014	463,593	$61,922	$63.58	$57.92 - $68.06
Q1 2014	796,456	$96,690	$59.57	$52.32 - $64.64
Q4 2013	1,018,278	$108,314	$52.63	$49.56 - $56.55
Q3 2013	932,870	$92,960	$48.06	$43.99 - $50.19
Q2 2013	720,810	$64,649	$43.69	$40.78 - $46.30