Costco Wholesale Corporation· COST

🇺🇸 US · LargeSP500NASDAQ

Consumer Defensive Discount Stores Website

Price: $895.31
Day: +0.15%
Mkt Cap: $397.05B
52W Range: $844.06 – $1,096.50
Volume: 4.16M
Beta: 0.85

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

Smart Money: 3.1 / 5 (Neutral), from 3 of 3 components
Institutions Q2 2026: 4,367 institutions hold; 1,924 added, 1,750 reduced

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Costco Wholesale Corporation

COST|Consumer Defensive|Discount Stores

Current price: $895

Smart Money

Dimension 5 of 5

Insider selling pace · Q2 2026

0.2x

vs own 6-quarter average

Seller breadth · Q2 2026

2 sellers

vs 4.0 avg per quarter

Institutional net breadth · Q2 2026

+167

2,134 adding vs 1,967 reducing

Institutional ownership · Q2 2026

73.5%

4,367 institutions

Insider Selling Pace

Each quarter's selling vs this stock's own trailing 6-quarter average

Light <0.5xRoutineElevated >1.5xHeavy >3xBuying

Institutional Positions

Institutions adding above the line, reducing below, net as a line

NewIncreasedReducedClosedNet

Largest Institutional Holders, Q2 2026

By reported market value, and how each moved in the quarter

Holder

Change

BLACKROCK, INC.

34.2M

-2.1%

VANGUARD CAPITAL MANAGEMENT LLC

29.0M

+0.4%

STATE STREET CORP

18.4M

+1.3%

INVESCO LTD.

14.0M

+50.2%

GEODE CAPITAL MANAGEMENT, LLC

10.6M

-0.3%

VANGUARD PORTFOLIO MANAGEMENT LLC

10.4M

-2.8%

ETF & Fund Activity, Q3 2026

How the covering funds split between buying, holding and selling

0 buying10 unchanged2 selling

12 funds held COST in Q3 2026, holding 1.9M shares between them, down 0.2% on the quarter.

Largest fund holders

SPDR SERIES TRUST1.8M sh

GLENMEDE FUND INC57.6K sh

NATIONWIDE MUTUAL FUNDS49.5K sh

Notable Insider Transactions, Q2 2026

Largest open-market purchases and sales by value in the last eight quarters

Sale · Apr 17

Klauer James C

$3.9M

Sale · Oct 11

Miller Russell D

$3.9M

Sale · Jul 14

Rubanenko Yoram

$3.9M

Insider transactions from SEC Form 4 filings; institutional holdings from quarterly 13F filings, which are reported with a lag and can overlap between filers. 13F: quarterly institutional holdings report · ETF: Exchange-Traded Fund

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

Explore COST on stockoscope.com→

Generated September 20, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

COST Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.1/5

Neutral

Weighted across 3 components

Component Breakdown (3 of 3 available)

Insider Activity

40% weight

+10

Institutional Flow

50% weight

+18

Fund Flow

10% weight

-100

Overall Smart Money sentiment of 3.1/5 (Neutral) based on a weighted combination of 3 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated September 19, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Selling Pace for COST

Each quarter's selling vs the stock's own trailing 6-quarter average; 1.0x is typical for this stock. Green triangles mark quarters with insider buying.

Neutral

Routine insider selling in Q2 2026

2 sales totaling $1.5M (1.6K shares)

Share volume is well below the historical pace (0.2x average), insiders are holding more

Sell-only pattern: no insider purchases across 15 quarters

Selling has increased for 4 straight quarters

0.2x

Selling pace

vs own 6-qtr average

Light

0.21%

Stake sold

of active insiders' holdings

2 sellers

Seller breadth

vs 4.0 avg per quarter

None

Insider buying

in the last 16 quarters

Notable Recent Transactions, COST

Top 8 highest-value insider trades from the last 8 quarters

Klauer James C

EVP

Sell

4,000 shares at $981.07

≈8.3% of their stake at the time

Apr 17, 2025$3.92M

Miller Russell D

Sr. Executive Vice President

Sell

4,400 shares at $891.15

≈30.1% of their stake at the time

Oct 11, 2024$3.92M

Rubanenko Yoram

EVP

Sell

4,000 shares at $974.96

≈40.9% of their stake at the time

Jul 14, 2025$3.90M

Vachris Roland Michael

CEO

Sell

3,600 shares at $931.00

≈8.1% of their stake at the time

Mar 11, 2025$3.35M

Miller Russell D

Sr. Executive Vice President

Sell

3,381 shares at $915.00

≈25.8% of their stake at the time

Sep 29, 2025$3.09M

Callans Patrick J

EVP

Sell

3,000 shares at $1002.77

≈4.9% of their stake at the time

Jun 9, 2025$3.01M

Adamo Claudine

EVP

Sell

2,700 shares at $935.68

≈28.3% of their stake at the time

Oct 24, 2025$2.53M

Wilcox William Richard

EVP

Sell

2,400 shares at $930.13

≈54.5% of their stake at the time

Nov 7, 2025$2.23M

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Positions for COST

Institutions adding (new + increased) above zero, reducing (reduced + closed) below, net as a line

New Increased Reduced Closed Net (adding − reducing)

Neutral

Mixed institutional activity in Q2 2026

73.5% institutional ownership

Balanced activity: 2134 adding vs 1967 reducing

13F shares increased by 3.1%, a notable change

Momentum weakening from prior quarter

+167

Net breadth

2,134 adding vs 1,967 reducing

Balanced

1.08

Add / reduce ratio

in Q2 2026

-7

New − closed

210 initiated, 217 exited

5 of 10

Top holders adding

largest holders with a known change

Position Changes

Q2 2026: how are institutions adjusting their positions?

+2134 growing-1967 shrinkingNet: +167

1924

1750

New (210)

Increased (1924)

Reduced (1750)

Closed (217)

Top Institutional Holders, COST

Largest 8 institutional positions by ownership percentage as of Q2 2026

BLACKROCK, INC.

34.2M

$32.0B

Ownership

7.70%

-2.1%

VANGUARD CAPITAL MANAGEMENT LLC

29.0M

$27.1B

Ownership

6.53%

+0.4%

STATE STREET CORP

18.4M

$17.2B

Ownership

4.14%

+1.3%

INVESCO LTD.

14.0M

$13.1B

Ownership

3.15%

+50.2%

GEODE CAPITAL MANAGEMENT, LLC

10.6M

$9.9B

Ownership

2.39%

-0.3%

VANGUARD PORTFOLIO MANAGEMENT LLC

10.4M

$9.7B

Ownership

2.34%

-2.8%

MORGAN STANLEY

10.2M

$9.6B

Ownership

2.30%

+3.3%

BANK OF AMERICA CORP /DE/

7.2M

$6.8B

Ownership

1.63%

-3.5%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q3 2026: 12 ETFs and mutual funds reporting

0 buying2 sellingNet: -2

Buying (0)

Unchanged (10)

Selling (2)

In total, funds bought 0 shares and sold 3.8K this quarter. Each fund counts once in the bar above, whatever the size of its move.

Very Bearish

Funds distributing in Q3 2026

12 ETFs and mutual funds reporting

2 funds selling vs 0 buying

Top Fund Holders, COST

Largest 8 ETF and mutual fund positions by shares held, each fund's latest filing

SPDR SERIES TRUST

1.8M

Weight

8.91%

Jul 31, 2026No change

GLENMEDE FUND INC

57.6K

Weight

3.51%

Jul 31, 2026No change

NATIONWIDE MUTUAL FUNDS

49.5K

Weight

0.01%

Jul 31, 2026Decreased

Series Portfolios Trust

6.1K

Weight

3.91%

Jul 31, 2026No change

Eaton Vance Tax-Managed Buy-Write Income Fund

2.5K

Weight

7.16%

Jun 30, 2026Decreased

AMG FUNDS

2.4K

Weight

0.01%

Jun 30, 2026Decreased

Segall Bryant & Hamill Trust

2.4K

Weight

0.02%

Jun 30, 2026Increased

Mutual Fund & Variable Insurance Trust

2.4K

Weight

0.01%

Jun 30, 2026Decreased

Costco Wholesale Corporation· COST

Holdings Analysis

Insider Trading Activity

1.3Transaction History89Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings187Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History89Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings187Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights