COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

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

Q4 2025

Shares 521,182 Value ($000) $449,436 Avg Close $905.73 Range $844.06 - $962.64

Q3 2025

Shares 551,558 Value ($000) $510,539 Avg Close $956.70 Range $902.01 - $997.89

Q2 2025

Shares 551,986 Value ($000) $546,433 Avg Close $990.72 Range $868.14 - $1064.10

Q1 2025

Shares 548,899 Value ($000) $519,137 Avg Close $970.56 Range $877.95 - $1073.82

Q4 2024

Shares 588,056 Value ($000) $538,818 Avg Close $922.64 Range $861.51 - $1003.02

Q3 2024

Shares 588,458 Value ($000) $521,680 Avg Close $861.91 Range $787.84 - $917.81

Q2 2024

Shares 568,653 Value ($000) $483,350 Avg Close $773.82 Range $690.64 - $867.04

Q1 2024

Shares 569,763 Value ($000) $417,426 Avg Close $706.75 Range $633.49 - $779.59

Q4 2023

Shares 573,586 Value ($000) $378,613 Avg Close $573.49 Range $521.47 - $661.25

Q3 2023

Shares 562,827 Value ($000) $317,975 Avg Close $532.21 Range $505.45 - $552.31

Q2 2023

Shares 555,279 Value ($000) $298,951 Avg Close $487.14 Range $459.09 - $519.84

Q1 2023

Shares 499,350 Value ($000) $248,112 Avg Close $471.27 Range $429.88 - $509.61

Q4 2022

Shares 474,306 Value ($000) $216,521 Avg Close $468.77 Range $430.19 - $520.75

Q3 2022

Shares 470,821 Value ($000) $222,355 Avg Close $498.08 Range $444.08 - $541.06

Q2 2022

Shares 458,730 Value ($000) $219,860 Avg Close $484.91 Range $388.78 - $584.62

Q1 2022

Shares 448,191 Value ($000) $258,091 Avg Close $500.83 Range $447.15 - $559.84

Q4 2021

Shares 444,012 Value ($000) $252,066 Avg Close $488.10 Range $415.17 - $544.86

Q3 2021

Shares 442,929 Value ($000) $199,030 Avg Close $418.22 Range $374.22 - $447.84

Q2 2021

Shares 445,166 Value ($000) $176,139 Avg Close $359.04 Range $333.36 - $380.48

Q1 2021

Shares 430,774 Value ($000) $151,839 Avg Close $329.77 Range $291.05 - $361.01

Q4 2020

Shares 389,335 Value ($000) $146,694 Avg Close $347.39 Range $324.71 - $367.18

Q3 2020

Shares 384,540 Value ($000) $136,512 Avg Close $309.06 Range $276.17 - $334.67

Q2 2020

Shares 347,032 Value ($000) $105,224 Avg Close $279.18 Range $257.36 - $295.59

Q1 2020

Shares 337,764 Value ($000) $96,307 Avg Close $277.78 Range $248.54 - $298.00

Q4 2019

Shares 330,527 Value ($000) $97,149 Avg Close $271.52 Range $256.90 - $280.77

Q3 2019

Shares 333,487 Value ($000) $96,081 Avg Close $256.34 Range $238.19 - $280.38

Q2 2019

Shares 332,486 Value ($000) $87,863 Avg Close $226.60 Range $212.14 - $244.81

Q1 2019

Shares 302,591 Value ($000) $73,269 Avg Close $198.35 Range $180.94 - $220.09

Q4 2018

Shares 291,467 Value ($000) $59,375 Avg Close $201.98 Range $171.58 - $217.57

Q3 2018

Shares 296,326 Value ($000) $69,601 Avg Close $203.13 Range $185.65 - $221.43

Q2 2018

Shares 297,489 Value ($000) $62,169 Avg Close $177.76 Range $162.55 - $191.42

Q1 2018

Shares 311,368 Value ($000) $58,671 Avg Close $169.26 Range $157.50 - $179.09

Q4 2017

Shares 303,348 Value ($000) $56,459 Avg Close $154.45 Range $137.67 - $175.03

Q3 2017

Shares 366,307 Value ($000) $60,181 Avg Close $140.12 Range $133.57 - $147.68

Q2 2017

Shares 576,445 Value ($000) $92,191 Avg Close $150.98 Range $139.41 - $162.71

Q1 2017

Shares 613,112 Value ($000) $104,119 Avg Close $142.87 Range $134.91 - $152.51

Q4 2016

Shares 586,183 Value ($000) $93,854 Avg Close $129.79 Range $120.95 - $140.39

Q3 2016

Shares 564,968 Value ($000) $86,163 Avg Close $136.95 Range $124.90 - $143.90

Q2 2016

Shares 446,148 Value ($000) $70,063 Avg Close $128.04 Range $117.26 - $134.37

Q1 2016

Shares 391,874 Value ($000) $61,751 Avg Close $127.74 Range $119.17 - $135.67

Q4 2015

Shares 372,906 Value ($000) $60,224 Avg Close $132.84 Range $119.34 - $142.82

Q3 2015

Shares 465,168 Value ($000) $67,249 Avg Close $119.60 Range $98.22 - $123.53

Q2 2015

Shares 1,068,867 Value ($000) $144,361 Avg Close $120.23 Range $112.77 - $127.67

Q1 2015

Shares 1,184,093 Value ($000) $179,384 Avg Close $120.91 Range $111.40 - $128.73

Q4 2014

Shares 1,143,644 Value ($000) $162,111 Avg Close $109.42 Range $98.12 - $118.34

Q3 2014

Shares 1,186,650 Value ($000) $148,711 Avg Close $97.13 Range $92.09 - $102.72

Q2 2014

Shares 1,208,722 Value ($000) $139,196 Avg Close $91.81 Range $88.18 - $95.25

Q1 2014

Shares 1,482,737 Value ($000) $165,592 Avg Close $91.29 Range $87.26 - $95.07

Q4 2013

Shares 1,661,075 Value ($000) $197,700 Avg Close $95.15 Range $87.55 - $100.50

Q3 2013

Shares 1,776,812 Value ($000) $204,635 Avg Close $91.64 Range $87.25 - $95.29

Q2 2013

Shares 1,709,208 Value ($000) $188,987 Avg Close $86.56 Range $81.59 - $91.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	521,182	$449,436	$905.73	$844.06 - $962.64
Q3 2025	551,558	$510,539	$956.70	$902.01 - $997.89
Q2 2025	551,986	$546,433	$990.72	$868.14 - $1064.10
Q1 2025	548,899	$519,137	$970.56	$877.95 - $1073.82
Q4 2024	588,056	$538,818	$922.64	$861.51 - $1003.02
Q3 2024	588,458	$521,680	$861.91	$787.84 - $917.81
Q2 2024	568,653	$483,350	$773.82	$690.64 - $867.04
Q1 2024	569,763	$417,426	$706.75	$633.49 - $779.59
Q4 2023	573,586	$378,613	$573.49	$521.47 - $661.25
Q3 2023	562,827	$317,975	$532.21	$505.45 - $552.31
Q2 2023	555,279	$298,951	$487.14	$459.09 - $519.84
Q1 2023	499,350	$248,112	$471.27	$429.88 - $509.61
Q4 2022	474,306	$216,521	$468.77	$430.19 - $520.75
Q3 2022	470,821	$222,355	$498.08	$444.08 - $541.06
Q2 2022	458,730	$219,860	$484.91	$388.78 - $584.62
Q1 2022	448,191	$258,091	$500.83	$447.15 - $559.84
Q4 2021	444,012	$252,066	$488.10	$415.17 - $544.86
Q3 2021	442,929	$199,030	$418.22	$374.22 - $447.84
Q2 2021	445,166	$176,139	$359.04	$333.36 - $380.48
Q1 2021	430,774	$151,839	$329.77	$291.05 - $361.01
Q4 2020	389,335	$146,694	$347.39	$324.71 - $367.18
Q3 2020	384,540	$136,512	$309.06	$276.17 - $334.67
Q2 2020	347,032	$105,224	$279.18	$257.36 - $295.59
Q1 2020	337,764	$96,307	$277.78	$248.54 - $298.00
Q4 2019	330,527	$97,149	$271.52	$256.90 - $280.77
Q3 2019	333,487	$96,081	$256.34	$238.19 - $280.38
Q2 2019	332,486	$87,863	$226.60	$212.14 - $244.81
Q1 2019	302,591	$73,269	$198.35	$180.94 - $220.09
Q4 2018	291,467	$59,375	$201.98	$171.58 - $217.57
Q3 2018	296,326	$69,601	$203.13	$185.65 - $221.43
Q2 2018	297,489	$62,169	$177.76	$162.55 - $191.42
Q1 2018	311,368	$58,671	$169.26	$157.50 - $179.09
Q4 2017	303,348	$56,459	$154.45	$137.67 - $175.03
Q3 2017	366,307	$60,181	$140.12	$133.57 - $147.68
Q2 2017	576,445	$92,191	$150.98	$139.41 - $162.71
Q1 2017	613,112	$104,119	$142.87	$134.91 - $152.51
Q4 2016	586,183	$93,854	$129.79	$120.95 - $140.39
Q3 2016	564,968	$86,163	$136.95	$124.90 - $143.90
Q2 2016	446,148	$70,063	$128.04	$117.26 - $134.37
Q1 2016	391,874	$61,751	$127.74	$119.17 - $135.67
Q4 2015	372,906	$60,224	$132.84	$119.34 - $142.82
Q3 2015	465,168	$67,249	$119.60	$98.22 - $123.53
Q2 2015	1,068,867	$144,361	$120.23	$112.77 - $127.67
Q1 2015	1,184,093	$179,384	$120.91	$111.40 - $128.73
Q4 2014	1,143,644	$162,111	$109.42	$98.12 - $118.34
Q3 2014	1,186,650	$148,711	$97.13	$92.09 - $102.72
Q2 2014	1,208,722	$139,196	$91.81	$88.18 - $95.25
Q1 2014	1,482,737	$165,592	$91.29	$87.26 - $95.07
Q4 2013	1,661,075	$197,700	$95.15	$87.55 - $100.50
Q3 2013	1,776,812	$204,635	$91.64	$87.25 - $95.29
Q2 2013	1,709,208	$188,987	$86.56	$81.59 - $91.78