COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

Rossmore Private Capital's Holding History (CIK: 0001733082)

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

Q4 2025

Shares 7,603 Value ($000) $6,556 Avg Close $905.73 Range $844.06 - $962.64

Q3 2025

Shares 6,803 Value ($000) $6,297 Avg Close $956.70 Range $902.01 - $997.89

Q2 2025

Shares 6,695 Value ($000) $6,628 Avg Close $990.72 Range $868.14 - $1064.10

Q1 2025

Shares 6,687 Value ($000) $6,325 Avg Close $970.56 Range $877.95 - $1073.82

Q4 2024

Shares 6,625 Value ($000) $6,070 Avg Close $922.64 Range $861.51 - $1003.02

Q3 2024

Shares 6,479 Value ($000) $5,744 Avg Close $861.91 Range $787.84 - $917.81

Q2 2024

Shares 6,488 Value ($000) $5,515 Avg Close $773.82 Range $690.64 - $867.04

Q1 2024

Shares 6,523 Value ($000) $4,779 Avg Close $706.75 Range $633.49 - $779.59

Q4 2023

Shares 6,499 Value ($000) $4,290 Avg Close $573.49 Range $521.47 - $661.25

Q3 2023

Shares 6,451 Value ($000) $3,645 Avg Close $532.21 Range $505.45 - $552.31

Q2 2023

Shares 6,501 Value ($000) $3,500 Avg Close $487.14 Range $459.09 - $519.84

Q1 2023

Shares 6,464 Value ($000) $3,212 Avg Close $471.27 Range $429.88 - $509.61

Q4 2022

Shares 6,524 Value ($000) $2,967 Avg Close $468.77 Range $430.19 - $520.75

Q3 2022

Shares 6,440 Value ($000) $3,041 Avg Close $498.08 Range $444.08 - $541.06

Q2 2022

Shares 6,405 Value ($000) $3,070 Avg Close $484.91 Range $388.78 - $584.62

Q1 2022

Shares 6,430 Value ($000) $3,703 Avg Close $500.83 Range $447.15 - $559.84

Q4 2021

Shares 6,455 Value ($000) $3,665 Avg Close $488.10 Range $415.17 - $544.86

Q3 2021

Shares 6,405 Value ($000) $2,878 Avg Close $418.22 Range $374.22 - $447.84

Q2 2021

Shares 6,330 Value ($000) $2,505 Avg Close $359.04 Range $333.36 - $380.48

Q1 2021

Shares 6,090 Value ($000) $2,147 Avg Close $329.77 Range $291.05 - $361.01

Q4 2020

Shares 6,022 Value ($000) $2,269 Avg Close $347.39 Range $324.71 - $367.18

Q3 2020

Shares 5,980 Value ($000) $2,123 Avg Close $309.06 Range $276.17 - $334.67

Q2 2020

Shares 5,615 Value ($000) $1,703 Avg Close $279.18 Range $257.36 - $295.59

Q1 2020

Shares 4,078 Value ($000) $1,163 Avg Close $277.78 Range $248.54 - $298.00

Q4 2019

Shares 2,633 Value ($000) $774 Avg Close $271.52 Range $256.90 - $280.77

Q3 2019

Shares 2,633 Value ($000) $759 Avg Close $256.34 Range $238.19 - $280.38

Q2 2019

Shares 2,633 Value ($000) $696 Avg Close $226.60 Range $212.14 - $244.81

Q1 2019

Shares 2,633 Value ($000) $638 Avg Close $198.35 Range $180.94 - $220.09

Q4 2018

Shares 2,658 Value ($000) $541 Avg Close $201.98 Range $171.58 - $217.57

Q3 2018

Shares 2,433 Value ($000) $571 Avg Close $203.13 Range $185.65 - $221.43

Q2 2018

Shares 2,433 Value ($000) $508 Avg Close $177.76 Range $162.55 - $191.42

Q1 2018

Shares 2,433 Value ($000) $458 Avg Close $169.26 Range $157.50 - $179.09

Q4 2017

Shares 2,270 Value ($000) $422,492 Avg Close $154.45 Range $137.67 - $175.03

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	7,603	$6,556	$905.73	$844.06 - $962.64
Q3 2025	6,803	$6,297	$956.70	$902.01 - $997.89
Q2 2025	6,695	$6,628	$990.72	$868.14 - $1064.10
Q1 2025	6,687	$6,325	$970.56	$877.95 - $1073.82
Q4 2024	6,625	$6,070	$922.64	$861.51 - $1003.02
Q3 2024	6,479	$5,744	$861.91	$787.84 - $917.81
Q2 2024	6,488	$5,515	$773.82	$690.64 - $867.04
Q1 2024	6,523	$4,779	$706.75	$633.49 - $779.59
Q4 2023	6,499	$4,290	$573.49	$521.47 - $661.25
Q3 2023	6,451	$3,645	$532.21	$505.45 - $552.31
Q2 2023	6,501	$3,500	$487.14	$459.09 - $519.84
Q1 2023	6,464	$3,212	$471.27	$429.88 - $509.61
Q4 2022	6,524	$2,967	$468.77	$430.19 - $520.75
Q3 2022	6,440	$3,041	$498.08	$444.08 - $541.06
Q2 2022	6,405	$3,070	$484.91	$388.78 - $584.62
Q1 2022	6,430	$3,703	$500.83	$447.15 - $559.84
Q4 2021	6,455	$3,665	$488.10	$415.17 - $544.86
Q3 2021	6,405	$2,878	$418.22	$374.22 - $447.84
Q2 2021	6,330	$2,505	$359.04	$333.36 - $380.48
Q1 2021	6,090	$2,147	$329.77	$291.05 - $361.01
Q4 2020	6,022	$2,269	$347.39	$324.71 - $367.18
Q3 2020	5,980	$2,123	$309.06	$276.17 - $334.67
Q2 2020	5,615	$1,703	$279.18	$257.36 - $295.59
Q1 2020	4,078	$1,163	$277.78	$248.54 - $298.00
Q4 2019	2,633	$774	$271.52	$256.90 - $280.77
Q3 2019	2,633	$759	$256.34	$238.19 - $280.38
Q2 2019	2,633	$696	$226.60	$212.14 - $244.81
Q1 2019	2,633	$638	$198.35	$180.94 - $220.09
Q4 2018	2,658	$541	$201.98	$171.58 - $217.57
Q3 2018	2,433	$571	$203.13	$185.65 - $221.43
Q2 2018	2,433	$508	$177.76	$162.55 - $191.42
Q1 2018	2,433	$458	$169.26	$157.50 - $179.09
Q4 2017	2,270	$422,492	$154.45	$137.67 - $175.03