COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

MOUNTAIN PACIFIC INVESTMENT ADVISERS INC/ID's Holding History (CIK: 0001067324)

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

Q4 2025

Shares 9,990 Value ($000) $8,615 Avg Close $905.73 Range $844.06 - $962.64

Q3 2025

Shares 10,068 Value ($000) $9,320 Avg Close $956.70 Range $902.01 - $997.89

Q2 2025

Shares 10,073 Value ($000) $9,972 Avg Close $990.72 Range $868.14 - $1064.10

Q1 2025

Shares 10,083 Value ($000) $9,537 Avg Close $970.56 Range $877.95 - $1073.82

Q4 2024

Shares 10,430 Value ($000) $9,557 Avg Close $922.64 Range $861.51 - $1003.02

Q3 2024

Shares 10,538 Value ($000) $9,343 Avg Close $861.91 Range $787.84 - $917.81

Q2 2024

Shares 6,830 Value ($000) $5,805 Avg Close $773.82 Range $690.64 - $867.04

Q1 2024

Shares 8,843 Value ($000) $6,479 Avg Close $706.75 Range $633.49 - $779.59

Q4 2023

Shares 9,105 Value ($000) $6,010 Avg Close $573.49 Range $521.47 - $661.25

Q3 2023

Shares 8,343 Value ($000) $4,714 Avg Close $532.21 Range $505.45 - $552.31

Q2 2023

Shares 8,430 Value ($000) $4,539 Avg Close $487.14 Range $459.09 - $519.84

Q1 2023

Shares 8,616 Value ($000) $4,281 Avg Close $471.27 Range $429.88 - $509.61

Q4 2022

Shares 8,545 Value ($000) $3,901 Avg Close $468.77 Range $430.19 - $520.75

Q3 2022

Shares 8,624 Value ($000) $4,073 Avg Close $498.08 Range $444.08 - $541.06

Q2 2022

Shares 8,974 Value ($000) $4,301 Avg Close $484.91 Range $388.78 - $584.62

Q1 2022

Shares 8,942 Value ($000) $5,149 Avg Close $500.83 Range $447.15 - $559.84

Q4 2021

Shares 8,920 Value ($000) $5,064 Avg Close $488.10 Range $415.17 - $544.86

Q3 2021

Shares 8,795 Value ($000) $3,952 Avg Close $418.22 Range $374.22 - $447.84

Q2 2021

Shares 8,795 Value ($000) $3,480 Avg Close $359.04 Range $333.36 - $380.48

Q1 2021

Shares 9,395 Value ($000) $3,311 Avg Close $329.77 Range $291.05 - $361.01

Q4 2020

Shares 12,432 Value ($000) $4,684 Avg Close $347.39 Range $324.71 - $367.18

Q3 2020

Shares 12,432 Value ($000) $4,413 Avg Close $309.06 Range $276.17 - $334.67

Q2 2020

Shares 13,997 Value ($000) $4,244 Avg Close $279.18 Range $257.36 - $295.59

Q1 2020

Shares 13,497 Value ($000) $3,848 Avg Close $277.78 Range $248.54 - $298.00

Q4 2019

Shares 14,041 Value ($000) $4,127 Avg Close $271.52 Range $256.90 - $280.77

Q3 2019

Shares 14,064 Value ($000) $4,052 Avg Close $256.34 Range $238.19 - $280.38

Q2 2019

Shares 14,064 Value ($000) $3,717 Avg Close $226.60 Range $212.14 - $244.81

Q1 2019

Shares 14,164 Value ($000) $3,430 Avg Close $198.35 Range $180.94 - $220.09

Q4 2018

Shares 14,164 Value ($000) $2,885 Avg Close $201.98 Range $171.58 - $217.57

Q3 2018

Shares 14,200 Value ($000) $3,335 Avg Close $203.13 Range $185.65 - $221.43

Q2 2018

Shares 14,705 Value ($000) $3,073 Avg Close $177.76 Range $162.55 - $191.42

Q1 2018

Shares 14,805 Value ($000) $2,790 Avg Close $169.26 Range $157.50 - $179.09

Q4 2017

Shares 15,085 Value ($000) $2,808 Avg Close $154.45 Range $137.67 - $175.03

Q3 2017

Shares 15,385 Value ($000) $2,528 Avg Close $140.12 Range $133.57 - $147.68

Q2 2017

Shares 15,475 Value ($000) $2,475 Avg Close $150.98 Range $139.41 - $162.71

Q1 2017

Shares 15,225 Value ($000) $2,553 Avg Close $142.87 Range $134.91 - $152.51

Q4 2016

Shares 15,055 Value ($000) $2,410 Avg Close $129.79 Range $120.95 - $140.39

Q3 2016

Shares 15,055 Value ($000) $2,296 Avg Close $136.95 Range $124.90 - $143.90

Q2 2016

Shares 15,230 Value ($000) $2,392 Avg Close $128.04 Range $117.26 - $134.37

Q1 2016

Shares 15,005 Value ($000) $2,364 Avg Close $127.74 Range $119.17 - $135.67

Q4 2015

Shares 19,005 Value ($000) $3,069 Avg Close $132.84 Range $119.34 - $142.82

Q3 2015

Shares 27,940 Value ($000) $4,039 Avg Close $119.60 Range $98.22 - $123.53

Q2 2015

Shares 29,135 Value ($000) $3,935 Avg Close $120.23 Range $112.77 - $127.67

Q1 2015

Shares 30,185 Value ($000) $4,573 Avg Close $120.91 Range $111.40 - $128.73

Q4 2014

Shares 30,935 Value ($000) $4,385 Avg Close $109.42 Range $98.12 - $118.34

Q3 2014

Shares 31,904 Value ($000) $3,998 Avg Close $97.13 Range $92.09 - $102.72

Q2 2014

Shares 31,504 Value ($000) $3,628 Avg Close $91.81 Range $88.18 - $95.25

Q1 2014

Shares 32,494 Value ($000) $3,629 Avg Close $91.29 Range $87.26 - $95.07

Q4 2013

Shares 32,744 Value ($000) $3,897 Avg Close $95.15 Range $87.55 - $100.50

Q3 2013

Shares 32,754 Value ($000) $3,772 Avg Close $91.64 Range $87.25 - $95.29

Q2 2013

Shares 32,874 Value ($000) $3,635 Avg Close $86.56 Range $81.59 - $91.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	9,990	$8,615	$905.73	$844.06 - $962.64
Q3 2025	10,068	$9,320	$956.70	$902.01 - $997.89
Q2 2025	10,073	$9,972	$990.72	$868.14 - $1064.10
Q1 2025	10,083	$9,537	$970.56	$877.95 - $1073.82
Q4 2024	10,430	$9,557	$922.64	$861.51 - $1003.02
Q3 2024	10,538	$9,343	$861.91	$787.84 - $917.81
Q2 2024	6,830	$5,805	$773.82	$690.64 - $867.04
Q1 2024	8,843	$6,479	$706.75	$633.49 - $779.59
Q4 2023	9,105	$6,010	$573.49	$521.47 - $661.25
Q3 2023	8,343	$4,714	$532.21	$505.45 - $552.31
Q2 2023	8,430	$4,539	$487.14	$459.09 - $519.84
Q1 2023	8,616	$4,281	$471.27	$429.88 - $509.61
Q4 2022	8,545	$3,901	$468.77	$430.19 - $520.75
Q3 2022	8,624	$4,073	$498.08	$444.08 - $541.06
Q2 2022	8,974	$4,301	$484.91	$388.78 - $584.62
Q1 2022	8,942	$5,149	$500.83	$447.15 - $559.84
Q4 2021	8,920	$5,064	$488.10	$415.17 - $544.86
Q3 2021	8,795	$3,952	$418.22	$374.22 - $447.84
Q2 2021	8,795	$3,480	$359.04	$333.36 - $380.48
Q1 2021	9,395	$3,311	$329.77	$291.05 - $361.01
Q4 2020	12,432	$4,684	$347.39	$324.71 - $367.18
Q3 2020	12,432	$4,413	$309.06	$276.17 - $334.67
Q2 2020	13,997	$4,244	$279.18	$257.36 - $295.59
Q1 2020	13,497	$3,848	$277.78	$248.54 - $298.00
Q4 2019	14,041	$4,127	$271.52	$256.90 - $280.77
Q3 2019	14,064	$4,052	$256.34	$238.19 - $280.38
Q2 2019	14,064	$3,717	$226.60	$212.14 - $244.81
Q1 2019	14,164	$3,430	$198.35	$180.94 - $220.09
Q4 2018	14,164	$2,885	$201.98	$171.58 - $217.57
Q3 2018	14,200	$3,335	$203.13	$185.65 - $221.43
Q2 2018	14,705	$3,073	$177.76	$162.55 - $191.42
Q1 2018	14,805	$2,790	$169.26	$157.50 - $179.09
Q4 2017	15,085	$2,808	$154.45	$137.67 - $175.03
Q3 2017	15,385	$2,528	$140.12	$133.57 - $147.68
Q2 2017	15,475	$2,475	$150.98	$139.41 - $162.71
Q1 2017	15,225	$2,553	$142.87	$134.91 - $152.51
Q4 2016	15,055	$2,410	$129.79	$120.95 - $140.39
Q3 2016	15,055	$2,296	$136.95	$124.90 - $143.90
Q2 2016	15,230	$2,392	$128.04	$117.26 - $134.37
Q1 2016	15,005	$2,364	$127.74	$119.17 - $135.67
Q4 2015	19,005	$3,069	$132.84	$119.34 - $142.82
Q3 2015	27,940	$4,039	$119.60	$98.22 - $123.53
Q2 2015	29,135	$3,935	$120.23	$112.77 - $127.67
Q1 2015	30,185	$4,573	$120.91	$111.40 - $128.73
Q4 2014	30,935	$4,385	$109.42	$98.12 - $118.34
Q3 2014	31,904	$3,998	$97.13	$92.09 - $102.72
Q2 2014	31,504	$3,628	$91.81	$88.18 - $95.25
Q1 2014	32,494	$3,629	$91.29	$87.26 - $95.07
Q4 2013	32,744	$3,897	$95.15	$87.55 - $100.50
Q3 2013	32,754	$3,772	$91.64	$87.25 - $95.29
Q2 2013	32,874	$3,635	$86.56	$81.59 - $91.78