Costco Wholesale
Insider trading & Transactions

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Transaction Date Insider Security Shares Price per share Total value Source
Option
PORTERA JOSEPH P officer: Executive VP
 Common Stock 15,000 $34.28 $514,200
Sale
MOULTON PAUL G officer: Executive VP
 Common Stock 60,000 $55.1 $3,306,000
Option
MOULTON PAUL G officer: Executive VP
 Common Stock 60,000 $36.91 $2,214,360
Option
MOULTON PAUL G officer: Executive VP
 Stock Option 60,000 $36.91 $2,214,360
Sale
ZOOK DENNIS R officer: Former Executive VP
 Common Stock 60,000 $55 $3,300,000
Sale
PORTERA JOSEPH P officer: Executive VP
 Common Stock 60,000 $55 $3,300,000
Option
PORTERA JOSEPH P officer: Executive VP
 Common Stock 60,000 $38.79 $2,327,400
Option
ZOOK DENNIS R officer: Former Executive VP
 Common Stock 60,000 $38.79 $2,327,400
Sale
LIBENSON RICHARD M director, other: Director Emeri..
 Common Stock 19,000 $54.54 $1,036,260
Option
RUCKELSHAUS JILL S other: Former Director
 Stock Option 16,000 $14.06 $225,008
Sale
RUCKELSHAUS JILL S other: Former Director
 Common Stock 16,000 $14.06 $225,008
Option
RUCKELSHAUS JILL S other: Former Director
 Common Stock 16,000 $14.06 $225,008
Sale
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 20,000 $22.88 $457,500
Option
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 20,000 $22.88 $457,500
Option
GALANTI RICHARD A director, officer: Executive VP..
 Stock Option 20,000 $22.88 $457,500
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Stock Option 10,000 $38.79 $387,900
Sale
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 10,000 $55.18 $551,750
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 10,000 $38.79 $387,900
Option
SINEGAL JAMES D director
 Stock Option 300,000 $10.69 $3,206,400
Sale
SINEGAL JAMES D director
 Common Stock 200,000 $53.37 $10,674,400
Option
SINEGAL JAMES D director
 Common Stock 300,000 $10.69 $3,206,400
Option
GALANTI RICHARD A director, officer: Executive VP..
 Stock Option 20,000 $13.44 $268,760
Sale
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 20,000 $13.44 $268,760
Option
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 20,000 $13.44 $268,760
Sale
MEISENBACH JOHN W director
 Common Stock 16,000 $9.28 $148,496
Sale
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 10,000 $38.79 $387,900
Option
MEISENBACH JOHN W director
 Stock Option 16,000 $9.28 $148,496
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 10,000 $38.79 $387,900
Option
ZOOK DENNIS R officer: Former Executive VP
 Common Stock 60,000 $38.07 $2,284,200
Option
ZOOK DENNIS R officer: Former Executive VP
 Stock Option 45,000 $38.79 $1,745,550
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Stock Option 10,000 $38.79 $387,900
Option
MEISENBACH JOHN W director
 Common Stock 16,000 $9.28 $148,496
Sale
ZOOK DENNIS R officer: Former Executive VP
 Common Stock 60,000 $53.06 $3,183,480
Sale
BROTMAN JEFFREY H director, officer: Former Chair..
 Common Stock 33,300 $10.69 $355,910
Option
BROTMAN JEFFREY H director, officer: Former Chair..
 Common Stock 33,300 $10.69 $355,910
Option
BROTMAN JEFFREY H director, officer: Former Chair..
 Stock Option 33,300 $10.69 $355,910
Option
BROTMAN JEFFREY H director, officer: Former Chair..
 Common Stock 266,700 $10.69 $2,850,490
Option
BROTMAN JEFFREY H director, officer: Former Chair..
 Stock Option 266,700 $10.69 $2,850,490
Sale
BROTMAN JEFFREY H director, officer: Former Chair..
 Common Stock 266,700 $10.69 $2,850,490
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Stock Option 7,500 $37.35 $280,125
Sale
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 7,500 $37.35 $280,125
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 7,500 $37.35 $280,125
Sale
DICERCHIO RICHARD D director
 Common Stock 10,000 $49.5 $495,000
Sale
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 25,000 $13.44 $335,950
Option
GALANTI RICHARD A director, officer: Executive VP..
 Common Stock 25,000 $13.44 $335,950
Option
GALANTI RICHARD A director, officer: Executive VP..
 Stock Option 25,000 $13.44 $335,950
Sale
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 5,000 $49.41 $247,025
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Stock Option 5,000 $36.91 $184,530
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 5,000 $36.91 $184,530
Option
PETTERSON DAVID S other: Former Principal Acct Of..
 Common Stock 5,000 $36.91 $184,530

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Insider trading

Monitoring trades made by the management members or major shareholders of companies may help create a sharper picture of what is happening inside the companies. Base your decisions on buys or sells of the people involved and do the right thing at the right time.

Who is insider?

Every director or senior officer, as well as any other entity or individual owning more than 10% of the company’s shares on the stock market, is called an insider. Such people or entities are allowed to buy/sell the company's shares under strictly controlled conditions. Key premise here is that none of them can make trades based on non-public information about the company.

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