COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

Mechanics Bank Trust Department's Holding History (CIK: 0001439743)

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

Q4 2025

Shares 16,407 Value ($000) $14,148 Avg Close $905.73 Range $844.06 - $962.64

Q3 2025

Shares 16,284 Value ($000) $15,073 Avg Close $956.70 Range $902.01 - $997.89

Q2 2025

Shares 16,998 Value ($000) $16,827 Avg Close $990.72 Range $868.14 - $1064.10

Q1 2025

Shares 18,691 Value ($000) $17,678 Avg Close $970.56 Range $877.95 - $1073.82

Q4 2024

Shares 19,595 Value ($000) $17,954 Avg Close $922.64 Range $861.51 - $1003.02

Q3 2024

Shares 19,894 Value ($000) $17,636 Avg Close $861.91 Range $787.84 - $917.81

Q2 2024

Shares 20,226 Value ($000) $17,192 Avg Close $773.82 Range $690.64 - $867.04

Q1 2024

Shares 20,715 Value ($000) $15,176 Avg Close $706.75 Range $633.49 - $779.59

Q4 2023

Shares 21,300 Value ($000) $14,060 Avg Close $573.49 Range $521.47 - $661.25

Q3 2023

Shares 21,893 Value ($000) $12,369 Avg Close $532.21 Range $505.45 - $552.31

Q2 2023

Shares 22,250 Value ($000) $11,979 Avg Close $487.14 Range $459.09 - $519.84

Q1 2023

Shares 22,314 Value ($000) $11,087 Avg Close $471.27 Range $429.88 - $509.61

Q4 2022

Shares 22,789 Value ($000) $10,403 Avg Close $468.77 Range $430.19 - $520.75

Q3 2022

Shares 22,735 Value ($000) $10,737 Avg Close $498.08 Range $444.08 - $541.06

Q2 2022

Shares 23,141 Value ($000) $11,091 Avg Close $484.91 Range $388.78 - $584.62

Q1 2022

Shares 23,100 Value ($000) $13,302 Avg Close $500.83 Range $447.15 - $559.84

Q4 2021

Shares 23,567 Value ($000) $13,378 Avg Close $488.10 Range $415.17 - $544.86

Q3 2021

Shares 24,231 Value ($000) $10,888 Avg Close $418.22 Range $374.22 - $447.84

Q2 2021

Shares 24,897 Value ($000) $9,851 Avg Close $359.04 Range $333.36 - $380.48

Q1 2021

Shares 26,391 Value ($000) $9,303 Avg Close $329.77 Range $291.05 - $361.01

Q4 2020

Shares 25,827 Value ($000) $9,731 Avg Close $347.39 Range $324.71 - $367.18

Q3 2020

Shares 26,044 Value ($000) $9,245 Avg Close $309.06 Range $276.17 - $334.67

Q2 2020

Shares 26,863 Value ($000) $8,145 Avg Close $279.18 Range $257.36 - $295.59

Q1 2020

Shares 26,800 Value ($000) $7,642 Avg Close $277.78 Range $248.54 - $298.00

Q4 2019

Shares 27,421 Value ($000) $8,060 Avg Close $271.52 Range $256.90 - $280.77

Q3 2019

Shares 28,073 Value ($000) $8,088 Avg Close $256.34 Range $238.19 - $280.38

Q2 2019

Shares 27,550 Value ($000) $7,280 Avg Close $226.60 Range $212.14 - $244.81

Q1 2019

Shares 29,211 Value ($000) $7,073 Avg Close $198.35 Range $180.94 - $220.09

Q4 2018

Shares 29,911 Value ($000) $6,093 Avg Close $201.98 Range $171.58 - $217.57

Q3 2018

Shares 30,240 Value ($000) $7,102 Avg Close $203.13 Range $185.65 - $221.43

Q2 2018

Shares 30,739 Value ($000) $6,423 Avg Close $177.76 Range $162.55 - $191.42

Q1 2018

Shares 30,959 Value ($000) $5,834 Avg Close $169.26 Range $157.50 - $179.09

Q4 2017

Shares 32,354 Value ($000) $6,021 Avg Close $154.45 Range $137.67 - $175.03

Q3 2017

Shares 32,659 Value ($000) $5,366 Avg Close $140.12 Range $133.57 - $147.68

Q2 2017

Shares 33,556 Value ($000) $5,366 Avg Close $150.98 Range $139.41 - $162.71

Q1 2017

Shares 32,027 Value ($000) $5,370 Avg Close $142.87 Range $134.91 - $152.51

Q4 2016

Shares 33,602 Value ($000) $5,380 Avg Close $129.79 Range $120.95 - $140.39

Q3 2016

Shares 35,918 Value ($000) $5,477 Avg Close $136.95 Range $124.90 - $143.90

Q2 2016

Shares 36,208 Value ($000) $5,686 Avg Close $128.04 Range $117.26 - $134.37

Q1 2016

Shares 34,163 Value ($000) $5,383 Avg Close $127.74 Range $119.17 - $135.67

Q4 2015

Shares 32,123 Value ($000) $5,188 Avg Close $132.84 Range $119.34 - $142.82

Q3 2015

Shares 33,921 Value ($000) $4,903 Avg Close $119.60 Range $98.22 - $123.53

Q2 2015

Shares 34,229 Value ($000) $4,623 Avg Close $120.23 Range $112.77 - $127.67

Q1 2015

Shares 37,124 Value ($000) $5,624 Avg Close $120.91 Range $111.40 - $128.73

Q4 2014

Shares 38,619 Value ($000) $5,474 Avg Close $109.42 Range $98.12 - $118.34

Q3 2014

Shares 44,307 Value ($000) $5,552 Avg Close $97.13 Range $92.09 - $102.72

Q2 2014

Shares 47,507 Value ($000) $5,471 Avg Close $91.81 Range $88.18 - $95.25

Q1 2014

Shares 50,617 Value ($000) $5,653 Avg Close $91.29 Range $87.26 - $95.07

Q4 2013

Shares 50,637 Value ($000) $6,027 Avg Close $95.15 Range $87.55 - $100.50

Q3 2013

Shares 50,027 Value ($000) $5,762 Avg Close $91.64 Range $87.25 - $95.29

Q2 2013

Shares 49,155 Value ($000) $5,435 Avg Close $86.56 Range $81.59 - $91.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	16,407	$14,148	$905.73	$844.06 - $962.64
Q3 2025	16,284	$15,073	$956.70	$902.01 - $997.89
Q2 2025	16,998	$16,827	$990.72	$868.14 - $1064.10
Q1 2025	18,691	$17,678	$970.56	$877.95 - $1073.82
Q4 2024	19,595	$17,954	$922.64	$861.51 - $1003.02
Q3 2024	19,894	$17,636	$861.91	$787.84 - $917.81
Q2 2024	20,226	$17,192	$773.82	$690.64 - $867.04
Q1 2024	20,715	$15,176	$706.75	$633.49 - $779.59
Q4 2023	21,300	$14,060	$573.49	$521.47 - $661.25
Q3 2023	21,893	$12,369	$532.21	$505.45 - $552.31
Q2 2023	22,250	$11,979	$487.14	$459.09 - $519.84
Q1 2023	22,314	$11,087	$471.27	$429.88 - $509.61
Q4 2022	22,789	$10,403	$468.77	$430.19 - $520.75
Q3 2022	22,735	$10,737	$498.08	$444.08 - $541.06
Q2 2022	23,141	$11,091	$484.91	$388.78 - $584.62
Q1 2022	23,100	$13,302	$500.83	$447.15 - $559.84
Q4 2021	23,567	$13,378	$488.10	$415.17 - $544.86
Q3 2021	24,231	$10,888	$418.22	$374.22 - $447.84
Q2 2021	24,897	$9,851	$359.04	$333.36 - $380.48
Q1 2021	26,391	$9,303	$329.77	$291.05 - $361.01
Q4 2020	25,827	$9,731	$347.39	$324.71 - $367.18
Q3 2020	26,044	$9,245	$309.06	$276.17 - $334.67
Q2 2020	26,863	$8,145	$279.18	$257.36 - $295.59
Q1 2020	26,800	$7,642	$277.78	$248.54 - $298.00
Q4 2019	27,421	$8,060	$271.52	$256.90 - $280.77
Q3 2019	28,073	$8,088	$256.34	$238.19 - $280.38
Q2 2019	27,550	$7,280	$226.60	$212.14 - $244.81
Q1 2019	29,211	$7,073	$198.35	$180.94 - $220.09
Q4 2018	29,911	$6,093	$201.98	$171.58 - $217.57
Q3 2018	30,240	$7,102	$203.13	$185.65 - $221.43
Q2 2018	30,739	$6,423	$177.76	$162.55 - $191.42
Q1 2018	30,959	$5,834	$169.26	$157.50 - $179.09
Q4 2017	32,354	$6,021	$154.45	$137.67 - $175.03
Q3 2017	32,659	$5,366	$140.12	$133.57 - $147.68
Q2 2017	33,556	$5,366	$150.98	$139.41 - $162.71
Q1 2017	32,027	$5,370	$142.87	$134.91 - $152.51
Q4 2016	33,602	$5,380	$129.79	$120.95 - $140.39
Q3 2016	35,918	$5,477	$136.95	$124.90 - $143.90
Q2 2016	36,208	$5,686	$128.04	$117.26 - $134.37
Q1 2016	34,163	$5,383	$127.74	$119.17 - $135.67
Q4 2015	32,123	$5,188	$132.84	$119.34 - $142.82
Q3 2015	33,921	$4,903	$119.60	$98.22 - $123.53
Q2 2015	34,229	$4,623	$120.23	$112.77 - $127.67
Q1 2015	37,124	$5,624	$120.91	$111.40 - $128.73
Q4 2014	38,619	$5,474	$109.42	$98.12 - $118.34
Q3 2014	44,307	$5,552	$97.13	$92.09 - $102.72
Q2 2014	47,507	$5,471	$91.81	$88.18 - $95.25
Q1 2014	50,617	$5,653	$91.29	$87.26 - $95.07
Q4 2013	50,637	$6,027	$95.15	$87.55 - $100.50
Q3 2013	50,027	$5,762	$91.64	$87.25 - $95.29
Q2 2013	49,155	$5,435	$86.56	$81.59 - $91.78