COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

BALDWIN BROTHERS LLC/MA's Holding History (CIK: 0001021258)

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

Q4 2025

Shares 37,244 Value ($000) $32,117 Avg Close $905.73 Range $844.06 - $962.64

Q3 2025

Shares 37,783 Value ($000) $34,973 Avg Close $956.70 Range $902.01 - $997.89

Q2 2025

Shares 38,294 Value ($000) $37,909 Avg Close $990.72 Range $868.14 - $1064.10

Q1 2025

Shares 38,662 Value ($000) $36,566 Avg Close $970.56 Range $877.95 - $1073.82

Q4 2024

Shares 38,573 Value ($000) $35,343 Avg Close $922.64 Range $861.51 - $1003.02

Q3 2024

Shares 41,007 Value ($000) $36,354 Avg Close $861.91 Range $787.84 - $917.81

Q2 2024

Shares 41,395 Value ($000) $35,185 Avg Close $773.82 Range $690.64 - $867.04

Q1 2024

Shares 44,072 Value ($000) $32,288 Avg Close $706.75 Range $633.49 - $779.59

Q4 2023

Shares 53,344 Value ($000) $35,211 Avg Close $573.49 Range $521.47 - $661.25

Q3 2023

Shares 53,782 Value ($000) $30,385 Avg Close $532.21 Range $505.45 - $552.31

Q2 2023

Shares 54,863 Value ($000) $29,537 Avg Close $487.14 Range $459.09 - $519.84

Q1 2023

Shares 54,895 Value ($000) $27,276 Avg Close $471.27 Range $429.88 - $509.61

Q4 2022

Shares 55,304 Value ($000) $25,246 Avg Close $468.77 Range $430.19 - $520.75

Q3 2022

Shares 55,302 Value ($000) $26,118 Avg Close $498.08 Range $444.08 - $541.06

Q2 2022

Shares 56,762 Value ($000) $27,205 Avg Close $484.91 Range $388.78 - $584.62

Q1 2022

Shares 57,241 Value ($000) $32,963 Avg Close $500.83 Range $447.15 - $559.84

Q4 2021

Shares 58,028 Value ($000) $32,942 Avg Close $488.10 Range $415.17 - $544.86

Q3 2021

Shares 57,381 Value ($000) $25,783 Avg Close $418.22 Range $374.22 - $447.84

Q2 2021

Shares 57,947 Value ($000) $22,928 Avg Close $359.04 Range $333.36 - $380.48

Q1 2021

Shares 59,659 Value ($000) $21,029 Avg Close $329.77 Range $291.05 - $361.01

Q4 2020

Shares 57,615 Value ($000) $21,708 Avg Close $347.39 Range $324.71 - $367.18

Q3 2020

Shares 60,285 Value ($000) $21,401 Avg Close $309.06 Range $276.17 - $334.67

Q2 2020

Shares 61,356 Value ($000) $18,604 Avg Close $279.18 Range $257.36 - $295.59

Q1 2020

Shares 62,040 Value ($000) $17,689 Avg Close $277.78 Range $248.54 - $298.00

Q4 2019

Shares 62,124 Value ($000) $18,260 Avg Close $271.52 Range $256.90 - $280.77

Q3 2019

Shares 62,368 Value ($000) $17,968 Avg Close $256.34 Range $238.19 - $280.38

Q2 2019

Shares 65,026 Value ($000) $17,183 Avg Close $226.60 Range $212.14 - $244.81

Q1 2019

Shares 67,231 Value ($000) $16,279 Avg Close $198.35 Range $180.94 - $220.09

Q4 2018

Shares 70,317 Value ($000) $14,324 Avg Close $201.98 Range $171.58 - $217.57

Q3 2018

Shares 69,500 Value ($000) $16,324 Avg Close $203.13 Range $185.65 - $221.43

Q2 2018

Shares 67,116 Value ($000) $14,026 Avg Close $177.76 Range $162.55 - $191.42

Q1 2018

Shares 66,794 Value ($000) $12,586 Avg Close $169.26 Range $157.50 - $179.09

Q4 2017

Shares 68,089 Value ($000) $12,673 Avg Close $154.45 Range $137.67 - $175.03

Q3 2017

Shares 67,232 Value ($000) $11,046 Avg Close $140.12 Range $133.57 - $147.68

Q2 2017

Shares 66,585 Value ($000) $10,649 Avg Close $150.98 Range $139.41 - $162.71

Q1 2017

Shares 59,015 Value ($000) $9,896 Avg Close $142.87 Range $134.91 - $152.51

Q4 2016

Shares 50,607 Value ($000) $8,103 Avg Close $129.79 Range $120.95 - $140.39

Q3 2016

Shares 722 Value ($000) $110 Avg Close $136.95 Range $124.90 - $143.90

Q2 2016

Shares 1,773 Value ($000) $278 Avg Close $128.04 Range $117.26 - $134.37

Q1 2016

Shares 6,205 Value ($000) $978 Avg Close $127.74 Range $119.17 - $135.67

Q4 2015

Shares 1,430 Value ($000) $231 Avg Close $132.84 Range $119.34 - $142.82

Q3 2015

Shares 1,434 Value ($000) $207 Avg Close $119.60 Range $98.22 - $123.53

Q2 2015

Shares 2,164 Value ($000) $292 Avg Close $120.23 Range $112.77 - $127.67

Q1 2015

Shares 11,309 Value ($000) $1,713 Avg Close $120.91 Range $111.40 - $128.73

Q4 2014

Shares 8,571 Value ($000) $1,215 Avg Close $109.42 Range $98.12 - $118.34

Q1 2014

Shares 8,344 Value ($000) $932 Avg Close $91.29 Range $87.26 - $95.07

Q4 2013

Shares 16,895 Value ($000) $2,011 Avg Close $95.15 Range $87.55 - $100.50

Q3 2013

Shares 16,553 Value ($000) $1,906 Avg Close $91.64 Range $87.25 - $95.29

Q2 2013

Shares 16,554 Value ($000) $1,830 Avg Close $86.56 Range $81.59 - $91.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	37,244	$32,117	$905.73	$844.06 - $962.64
Q3 2025	37,783	$34,973	$956.70	$902.01 - $997.89
Q2 2025	38,294	$37,909	$990.72	$868.14 - $1064.10
Q1 2025	38,662	$36,566	$970.56	$877.95 - $1073.82
Q4 2024	38,573	$35,343	$922.64	$861.51 - $1003.02
Q3 2024	41,007	$36,354	$861.91	$787.84 - $917.81
Q2 2024	41,395	$35,185	$773.82	$690.64 - $867.04
Q1 2024	44,072	$32,288	$706.75	$633.49 - $779.59
Q4 2023	53,344	$35,211	$573.49	$521.47 - $661.25
Q3 2023	53,782	$30,385	$532.21	$505.45 - $552.31
Q2 2023	54,863	$29,537	$487.14	$459.09 - $519.84
Q1 2023	54,895	$27,276	$471.27	$429.88 - $509.61
Q4 2022	55,304	$25,246	$468.77	$430.19 - $520.75
Q3 2022	55,302	$26,118	$498.08	$444.08 - $541.06
Q2 2022	56,762	$27,205	$484.91	$388.78 - $584.62
Q1 2022	57,241	$32,963	$500.83	$447.15 - $559.84
Q4 2021	58,028	$32,942	$488.10	$415.17 - $544.86
Q3 2021	57,381	$25,783	$418.22	$374.22 - $447.84
Q2 2021	57,947	$22,928	$359.04	$333.36 - $380.48
Q1 2021	59,659	$21,029	$329.77	$291.05 - $361.01
Q4 2020	57,615	$21,708	$347.39	$324.71 - $367.18
Q3 2020	60,285	$21,401	$309.06	$276.17 - $334.67
Q2 2020	61,356	$18,604	$279.18	$257.36 - $295.59
Q1 2020	62,040	$17,689	$277.78	$248.54 - $298.00
Q4 2019	62,124	$18,260	$271.52	$256.90 - $280.77
Q3 2019	62,368	$17,968	$256.34	$238.19 - $280.38
Q2 2019	65,026	$17,183	$226.60	$212.14 - $244.81
Q1 2019	67,231	$16,279	$198.35	$180.94 - $220.09
Q4 2018	70,317	$14,324	$201.98	$171.58 - $217.57
Q3 2018	69,500	$16,324	$203.13	$185.65 - $221.43
Q2 2018	67,116	$14,026	$177.76	$162.55 - $191.42
Q1 2018	66,794	$12,586	$169.26	$157.50 - $179.09
Q4 2017	68,089	$12,673	$154.45	$137.67 - $175.03
Q3 2017	67,232	$11,046	$140.12	$133.57 - $147.68
Q2 2017	66,585	$10,649	$150.98	$139.41 - $162.71
Q1 2017	59,015	$9,896	$142.87	$134.91 - $152.51
Q4 2016	50,607	$8,103	$129.79	$120.95 - $140.39
Q3 2016	722	$110	$136.95	$124.90 - $143.90
Q2 2016	1,773	$278	$128.04	$117.26 - $134.37
Q1 2016	6,205	$978	$127.74	$119.17 - $135.67
Q4 2015	1,430	$231	$132.84	$119.34 - $142.82
Q3 2015	1,434	$207	$119.60	$98.22 - $123.53
Q2 2015	2,164	$292	$120.23	$112.77 - $127.67
Q1 2015	11,309	$1,713	$120.91	$111.40 - $128.73
Q4 2014	8,571	$1,215	$109.42	$98.12 - $118.34
Q1 2014	8,344	$932	$91.29	$87.26 - $95.07
Q4 2013	16,895	$2,011	$95.15	$87.55 - $100.50
Q3 2013	16,553	$1,906	$91.64	$87.25 - $95.29
Q2 2013	16,554	$1,830	$86.56	$81.59 - $91.78