VANGUARD GROUP INC
Rank #1
9.81%
- Shares
- 43.62M
- Change
- +165.35K
- Change %
- +38.00%
- Filing
- Dec 31, 2025
Increased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
NASDAQ · CONSUMER DEFENSIVE · Holders
Costco Wholesale Corp (COST) Institutional Ownership & Insider Trading History
Top COST institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Ownership read
COST insider sentiment: Net selling.
VANGUARD GROUP INC is the largest loaded institutional holder. 95 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
COST
Purchases—
Sales100.32K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
43.62M
VANGUARD GROUP INC
Insider stance
Net selling
$67.59M sold / — bought
Latest filing
Apr 1, 2026
Most recent holder or insider filing date
Rows loaded
240
120 holder / 120 insider
- Holder rows
- 120
- Market data feed
- Latest filing
- Apr 1, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 79
- 41 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
Costco Wholesale Corp (COST) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
BLACKROCK
Rank #2
7.86%
- Shares
- 34.95M
- Change
- -152.48K
- Change %
- -43.00%
- Filing
- Mar 31, 2026
Decreased
VANGUARD CAPITAL MANAGEMENT LLC
Rank #3
6.49%
- Shares
- 28.85M
- Change
- +28.85M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
STATE STREET CORP
Rank #4
4.08%
- Shares
- 18.15M
- Change
- +5.07K
- Change %
- +3.00%
- Filing
- Mar 31, 2026
Increased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #5
2.41%
- Shares
- 10.71M
- Change
- +10.71M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
GEODE CAPITAL MANAGEMENT
Rank #6
2.40%
- Shares
- 10.66M
- Change
- +270.70K
- Change %
- +2.61%
- Filing
- Mar 31, 2026
Increased
MORGAN STANLEY
Rank #7
2.23%
- Shares
- 9.90M
- Change
- +375.29K
- Change %
- +3.94%
- Filing
- Mar 31, 2026
Increased
BANK OF AMERICA CORP
Rank #8
1.69%
- Shares
- 7.52M
- Change
- +773.65K
- Change %
- +11.48%
- Filing
- Mar 31, 2026
Increased
FMR LLC
Rank #9
1.51%
- Shares
- 6.72M
- Change
- +25.45K
- Change %
- +38.00%
- Filing
- Mar 31, 2026
Increased
NORGES BANK
Rank #10
1.35%
- Shares
- 6.02M
- Change
- +274.91K
- Change %
- +4.78%
- Filing
- Dec 31, 2025
Increased
NORTHERN TRUST CORP
Rank #11
1.11%
- Shares
- 4.93M
- Change
- +14.39K
- Change %
- +29.00%
- Filing
- Mar 31, 2026
Increased
INVESCO LTD.
Rank #12
0.97%
- Shares
- 4.31M
- Change
- -15.22K
- Change %
- -35.00%
- Filing
- Mar 31, 2026
Decreased
JPMORGAN CHASE & CO
Rank #13
0.91%
- Shares
- 4.04M
- Change
- +1.06M
- Change %
- +35.54%
- Filing
- Mar 31, 2026
Increased
ROYAL BANK OF CANADA
Rank #14
0.85%
- Shares
- 3.76M
- Change
- -194.03K
- Change %
- -4.91%
- Filing
- Mar 31, 2026
Decreased
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Rank #15
0.76%
- Shares
- 3.40M
- Change
- +118.29K
- Change %
- +3.60%
- Filing
- Mar 31, 2026
Increased
BANK OF NEW YORK MELLON CORP
Rank #16
0.76%
- Shares
- 3.39M
- Change
- -126.72K
- Change %
- -3.60%
- Filing
- Mar 31, 2026
Decreased
FISHER ASSET MANAGEMENT
Rank #17
0.72%
- Shares
- 3.22M
- Change
- +43.57K
- Change %
- +1.37%
- Filing
- Mar 31, 2026
Increased
GOLDMAN SACHS GROUP INC
Rank #18
0.72%
- Shares
- 3.21M
- Change
- +624.41K
- Change %
- +24.11%
- Filing
- Mar 31, 2026
Increased
WELLS FARGO & COMPANY
Rank #19
0.70%
- Shares
- 3.11M
- Change
- +67.86K
- Change %
- +2.23%
- Filing
- Mar 31, 2026
Increased
NUVEEN
Rank #20
0.69%
- Shares
- 3.07M
- Change
- +901.34K
- Change %
- +41.48%
- Filing
- Mar 31, 2026
Increased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 9.81% | 43.62M | +165.35K Increased | +38.00% | Dec 31, 2025 | |
| 2 | 7.86% | 34.95M | -152.48K Decreased | -43.00% | Mar 31, 2026 | |
| 3 | 6.49% | 28.85M | +28.85M Initiated | — | Mar 31, 2026 | |
| 4 | 4.08% | 18.15M | +5.07K Increased | +3.00% | Mar 31, 2026 | |
| 5 | 2.41% | 10.71M | +10.71M Initiated | — | Mar 31, 2026 | |
| 6 | 2.40% | 10.66M | +270.70K Increased | +2.61% | Mar 31, 2026 | |
| 7 | 2.23% | 9.90M | +375.29K Increased | +3.94% | Mar 31, 2026 | |
| 8 | 1.69% | 7.52M | +773.65K Increased | +11.48% | Mar 31, 2026 | |
| 9 | 1.51% | 6.72M | +25.45K Increased | +38.00% | Mar 31, 2026 | |
| 10 | 1.35% | 6.02M | +274.91K Increased | +4.78% | Dec 31, 2025 | |
| 11 | 1.11% | 4.93M | +14.39K Increased | +29.00% | Mar 31, 2026 | |
| 12 | 0.97% | 4.31M | -15.22K Decreased | -35.00% | Mar 31, 2026 | |
| 13 | 0.91% | 4.04M | +1.06M Increased | +35.54% | Mar 31, 2026 | |
| 14 | ROYAL BANK OF CANADA | 0.85% | 3.76M | -194.03K Decreased | -4.91% | Mar 31, 2026 |
| 15 | 0.76% | 3.40M | +118.29K Increased | +3.60% | Mar 31, 2026 | |
| 16 | BANK OF NEW YORK MELLON CORP | 0.76% | 3.39M | -126.72K Decreased | -3.60% | Mar 31, 2026 |
| 17 | FISHER ASSET MANAGEMENT | 0.72% | 3.22M | +43.57K Increased | +1.37% | Mar 31, 2026 |
| 18 | 0.72% | 3.21M | +624.41K Increased | +24.11% | Mar 31, 2026 | |
| 19 | WELLS FARGO & COMPANY | 0.70% | 3.11M | +67.86K Increased | +2.23% | Mar 31, 2026 |
| 20 | NUVEEN | 0.69% | 3.07M | +901.34K Increased | +41.48% | Mar 31, 2026 |
Showing 20 of 120 matching institutional rows.Load more institutions
Recent insider transactions
Costco Wholesale Corp (COST) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
FRATES, CATON
Executive Vice President
- Shares
- 700
- % company
- <0.01%
- Price
- $993.00
- Value
- $695,100
Filed Apr 1, 2026
GEORGE, SARAH CATHERINE
Executive Vice President
- Shares
- 642
- % company
- <0.01%
- Price
- $991.21
- Value
- $636,483
Filed Mar 12, 2026
MILLERCHIP, GARY
Executive Vice President
- Shares
- 1.15K
- % company
- <0.01%
- Price
- $992.23
- Value
- $1,145,050
Filed Mar 11, 2026
ADAMO, CLAUDINE
Executive Vice President
- Shares
- 730
- % company
- <0.01%
- Price
- $1,003
- Value
- $732,205
Filed Mar 9, 2026
JONES, TERESA A.
Executive Vice President
- Shares
- 300
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Jan 27, 2026
RAIKES, JEFFREY S
Director
- Shares
- 5.12K
- % company
- <0.01%
- Price
- Not reported
- Value
- Not reported
Filed Jan 27, 2026
JONES, TERESA A.
Executive Vice President
- Shares
- 850
- % company
- <0.01%
- Price
- $986.26
- Value
- $838,318
Filed Jan 21, 2026
RAIMONDO, GINA MARIE
Director
- Shares
- 215
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed Jan 16, 2026
DECKER, SUSAN L
Director
- Shares
- 458
- % company
- <0.01%
- Price
- $955.00
- Value
- $437,390
Filed Jan 16, 2026
KLAUER, JAMES C
Executive Vice President
- Shares
- 1.50K
- % company
- <0.01%
- Price
- $939.00
- Value
- $1,408,500
Filed Jan 14, 2026
MILLER, RUSSELL D
Sr. Executive Vice President
- Shares
- 1.50K
- % company
- <0.01%
- Price
- $916.32
- Value
- $1,374,480
Filed Jan 9, 2026
POLIT, JAVIER
Executive Vice President
- Shares
- 558
- % company
- <0.01%
- Price
- $862.90
- Value
- $481,759
Filed Dec 30, 2025
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | FRATES, CATON Executive Vice President | <0.01% | Sale to issuer | 700 | $993.00 | $695,100 | Apr 1, 2026 |
| 2 | GEORGE, SARAH CATHERINE Executive Vice President | <0.01% | Sale to issuer | 642 | $991.21 | $636,483 | Mar 12, 2026 |
| 3 | MILLERCHIP, GARY Executive Vice President | <0.01% | Sale to issuer | 1.15K | $992.23 | $1,145,050 | Mar 11, 2026 |
| 4 | ADAMO, CLAUDINE Executive Vice President | <0.01% | Sale to issuer | 730 | $1,003 | $732,205 | Mar 9, 2026 |
| 5 | JONES, TERESA A. Executive Vice President | <0.01% | Sale to issuer | 300 | Not reported | Not reported | Jan 27, 2026 |
| 6 | RAIKES, JEFFREY S Director | <0.01% | Sale to issuer | 5.12K | Not reported | Not reported | Jan 27, 2026 |
| 7 | JONES, TERESA A. Executive Vice President | <0.01% | Sale to issuer | 850 | $986.26 | $838,318 | Jan 21, 2026 |
| 8 | RAIMONDO, GINA MARIE Director | <0.01% | Award / grant | 215 | No cash value | No cash value | Jan 16, 2026 |
| 9 | DECKER, SUSAN L Director | <0.01% | Sale to issuer | 458 | $955.00 | $437,390 | Jan 16, 2026 |
| 10 | KLAUER, JAMES C Executive Vice President | <0.01% | Sale to issuer | 1.50K | $939.00 | $1,408,500 | Jan 14, 2026 |
| 11 | MILLER, RUSSELL D Sr. Executive Vice President | <0.01% | Sale to issuer | 1.50K | $916.32 | $1,374,480 | Jan 9, 2026 |
| 12 | POLIT, JAVIER Executive Vice President | <0.01% | Sale to issuer | 558 | $862.90 | $481,759 | Dec 30, 2025 |
Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest COST shareholders?
VANGUARD GROUP INC is the largest institutional holder in the loaded COST ownership feed, with 43.62 million shares, or about 9.81% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of COST?
The current TECHi snapshot has 120 loaded institutional rows for Costco Wholesale Corp. 79 rows are marked increased or initiated, while 41 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Costco Wholesale Corp insider transactions?
The insider transaction table currently shows 120 loaded Form 4 rows for COST, with the latest insider filing dated Apr 1, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are COST insiders buying or selling?
The loaded COST Form 4 rows currently read Net selling: 95 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active COST insider in the loaded filings?
VACHRIS, ROLAND MICHAEL is the most active insider by absolute share movement in the loaded COST rows, with 20,087 shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.