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Detailed Insider History for:
COSTCO WHOLESALE CORP NEW: COST
Price: 9/18/26 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$895.31 $1,096.50 $844.06 $397,051 444 2,204 0.7% 1.7% 74.43% 0.16%
Exch Sector Industry Sub-Industry
NasdaqGS Retail Trade General Merchandise Stores Retail- Variety Stores
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
WILCOX WILLIAM RICHARD
VP
JS
$1,745,753
1,935
---
9/10/26
---
$902.38
4,194
-31.6
D
R
9/14/26 - 5:30:24 pm
2
    
 
WILCOX WILLIAM RICHARD
VP
JB
---
4,129
---
9/10/26
---
---
6,129
206.5
D
R
9/14/26 - 5:30:24 pm
3
    
 
RUBANENKO YORAM
VP
JS
$1,530,393
1,696
---
9/10/26
---
$902.38
10,680
-13.7
D
R
9/14/26 - 5:28:42 pm
4
    
 
RUBANENKO YORAM
VP
JB
---
4,129
---
9/10/26
---
---
12,376
50.1
D
R
9/14/26 - 5:28:42 pm
5
    
 
RIEL PIERRE
VP
JS
$1,409,211
1,562
---
9/10/26
---
$902.38
14,246
-9.9
D
R
9/14/26 - 5:25:36 pm
6
    
 
RIEL PIERRE
VP
JB
---
4,552
---
9/10/26
---
---
15,808
40.4
D
R
9/14/26 - 5:25:36 pm
7
    
 
KLAUER JAMES C
VP
JS
$844,731
936
---
9/10/26
---
$902.38
48,030
-1.9
D
R
9/14/26 - 5:23:46 pm
8
    
 
KLAUER JAMES C
VP
JB
---
4,129
---
9/10/26
---
---
48,966
9.2
D
R
9/14/26 - 5:23:46 pm
9
    
 
JONES TERESA A
VP
JS
$1,316,153
1,459
---
9/10/26
---
$902.38
6,598
-18.1
D
R
9/14/26 - 5:22:13 pm
10
    
 
JONES TERESA A
VP
JB
---
4,129
---
9/10/26
---
---
8,057
105.1
D
R
9/14/26 - 5:22:13 pm
11
    
 
FRATES CATON
VP
JS
$1,492,864
1,654
---
9/10/26
---
$902.38
8,713
-16.0
D
R
9/14/26 - 5:20:20 pm
12
    
 
FRATES CATON
VP
JB
---
4,552
---
9/10/26
---
---
10,367
78.3
D
R
9/14/26 - 5:20:20 pm
13
    
 
ADAMO CLAUDINE
VP
JS
$827,198
917
---
9/10/26
---
$902.38
9,334
-8.9
D
R
9/14/26 - 5:17:41 pm
14
    
 
ADAMO CLAUDINE
VP
JB
---
4,129
---
9/10/26
---
---
10,250
67.5
D
R
9/14/26 - 5:17:41 pm
15
    
 
SELF ADAM WEBB
VP
3
---
---
---
8/31/26
---
---
3,527
---
D
R
9/10/26 - 5:48:38 pm
16
    
 
RAIKES JEFFREY S
DIR
JS
---
5,249
---
7/10/26
---
---
6,044
-46.5
D
---
7/14/26 - 4:14:16 pm
17
1y
4
25%
8%
7
DENMAN KENNETH D
DIR
S
$847,345
885
---
6/23/26
---
$957.45
4,779
-15.6
D
---
6/25/26 - 4:12:30 pm
18
    
 
FRATES CATON
VP
S
$695,100
700
---
4/1/26
---
$993.00
5,815
-10.7
D
---
4/1/26 - 6:13:26 pm
19
    
 
GEORGE SARAH CATHERINE
VP
JS
$636,483
642
---
3/12/26
---
$991.21
---
All
I
---
3/13/26 - 4:12:33 pm
20
    
 
MILLERCHIP GARY
VP
JS
$1,145,050
1,154
---
3/11/26
---
$992.23
15,465
-6.9
D
R
3/13/26 - 4:10:05 pm
21
    
 
ADAMO CLAUDINE
VP
S
$732,205
730
---
3/9/26
---
$1,003.02
6,121
-10.7
D
---
3/11/26 - 4:08:32 pm
22
    
 
GEORGE SARAH CATHERINE
VP
3
---
---
---
3/2/26
---
---
4,128
---
D
A,R
5/15/26 - 6:31:39 pm
23
    
 
GEORGE SARAH CATHERINE
VP
3
---
---
---
3/2/26
---
---
642
---
I
---
3/11/26 - 5:06:06 pm
24
    
 
GEORGE SARAH CATHERINE
VP
3
---
---
---
3/2/26
---
---
1,401
---
D
---
3/11/26 - 5:06:06 pm
25
    
 
RAIKES JEFFREY S
DIR
JS
---
5,115
---
1/27/26
---
---
11,293
-31.2
D
---
1/28/26 - 6:46:11 pm
26
    
 
JONES TERESA A
VP
JS
---
300
---
1/27/26
---
---
3,928
-7.1
D
---
1/28/26 - 6:43:58 pm
27
    
 
JONES TERESA A
VP
S
$838,318
850
---
1/21/26
---
$986.26
4,228
-16.7
D
---
1/23/26 - 4:53:38 pm
28
1y
28
4%
31%
2
DECKER SUSAN L
DIR
S
$437,390
458
---
1/16/26
---
$955.00
8,532
-5.1
D
---
1/20/26 - 4:15:47 pm
29
    
 
RAIMONDO GINA MARIE
DIR
JB
---
215
---
1/16/26
---
---
215
New
D
R
1/20/26 - 4:12:35 pm
30
    
 
RAIMONDO GINA MARIE
DIR
3
---
---
---
1/15/26
---
---
---
---
D
---
1/20/26 - 4:07:34 pm
31
1y
6
0%
28%
1
KLAUER JAMES C
VP
S
$1,408,500
1,500
---
1/14/26
---
$939.00
44,837
-3.2
D
---
1/15/26 - 4:27:15 pm
32
1y
8
0%
34%
1
MILLER RUSSELL D
VP
S
$1,374,480
1,500
---
1/9/26
---
$916.32
8,240
-15.4
I
---
1/12/26 - 4:36:30 pm
33
    
 
POLIT JAVIER
VP
S
$2,258,663
2,607
12/29/25
12/30/25
---
$862.89
10,190
-20.4
D
---
12/31/25 - 4:59:30 pm
34
    
 
DENMAN KENNETH D
DIR
JS
---
325
---
12/19/25
---
---
5,664
-5.4
D
---
12/22/25 - 4:36:38 pm
35
    
 
DECKER SUSAN L
DIR
JS
---
2,827
---
12/15/25
---
---
8,990
-23.9
D
---
12/17/25 - 4:30:39 pm
36
    
 
RAIKES JEFFREY S
DIR
JS
---
4,120
---
11/10/25
---
---
16,408
-20.1
D
---
11/12/25 - 5:47:27 pm
37
    
 
WILCOX WILLIAM RICHARD
VP
S
$2,232,312
2,400
---
11/7/25
---
$930.13
2,000
-54.5
D
---
11/12/25 - 5:45:23 pm
38
    
 
BARBRE TIFFANY MARIE
AO
S
$1,158,353
1,239
---
10/24/25
---
$934.62
5,155
-19.4
D
R
10/24/25 - 7:50:45 pm
39
    
 
ADAMO CLAUDINE
VP
JS
$3,191,995
3,405
10/22/25
10/24/25
---
$935.68
6,851
-33.2
D
R
10/24/25 - 7:12:12 pm
40
    
 
BARBRE TIFFANY MARIE
AO
JS
$512,319
542
---
10/22/25
---
$944.68
6,395
-7.8
D
R
10/24/25 - 7:50:45 pm
41
    
 
BARBRE TIFFANY MARIE
AO
JB
---
2,118
---
10/22/25
---
---
6,937
43.9
D
R
10/24/25 - 7:50:45 pm
42
    
 
VACHRIS ROLAND MICHAEL
PR,CEO,DIR
JS
$2,506,047
2,653
---
10/22/25
---
$944.68
52,258
-4.8
D
R
10/24/25 - 7:32:57 pm
43
    
 
VACHRIS ROLAND MICHAEL
PR,CEO,DIR
JB
---
13,834
---
10/22/25
---
---
54,911
33.7
D
R
10/24/25 - 7:32:57 pm
44
    
 
SULLIVAN JOHN CHRISTOPHER
VP
JS
$2,374,491
2,514
---
10/22/25
---
$944.68
47,671
-5.0
D
R
10/24/25 - 7:30:50 pm
45
    
 
SULLIVAN JOHN CHRISTOPHER
VP
JB
---
4,654
---
10/22/25
---
---
50,185
10.2
D
R
10/24/25 - 7:30:50 pm
46
    
 
POLIT JAVIER
VP
JS
$1,103,651
1,168
---
10/22/25
---
$944.68
12,797
-8.4
D
R
10/24/25 - 7:27:54 pm
47
    
 
POLIT JAVIER
VP
JB
---
4,219
---
10/22/25
---
---
13,965
43.3
D
R
10/24/25 - 7:27:54 pm
48
    
 
MILLERCHIP GARY
VP
JS
$768,374
813
---
10/22/25
---
$944.68
16,619
-4.7
D
R
10/24/25 - 7:23:44 pm
49
    
 
MILLERCHIP GARY
VP
JB
---
6,268
---
10/22/25
---
---
17,433
56.1
D
R
10/24/25 - 7:23:44 pm
50
    
 
KLAUER JAMES C
VP
JS
$866,602
917
---
10/22/25
---
$944.68
46,337
-1.9
D
R
10/24/25 - 7:20:07 pm
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