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Costco Wholesale Corp. insider trading

In twelve months insiders at Costco Wholesale bought nothing and sold $14.6M on the open market; none of the 13 sales was under a plan set in advance.

Bought on the open marketNonein twelve months
Sold on the open market$14.6M13 sales
Sales set in advanceNoneall 13 chosen by the insider
Pay taken in stockNone
New to this? How to read this page
  1. Insiders are the people who run the company: officers, directors and owners of 10% or more. They must report a trade on Form 4 within two business days.
  2. A purchase on the open market is the strongest sign: the insider spent their own money.
  3. A sale under a trading plan (Rule 10b5-1) says little: its dates were fixed months before. Sales outside a plan say more, but insiders sell for many reasons, such as taxes or a house.
  4. Grants, option exercises and shares held back for tax are left out.
  5. What is a Form 4? · Form 4 codes

What kind of trades

Insiders only sold: 13 sales worth $14.6M, each on a day the insider chose.

Purchasebought with their own money
Pay in stock, own choiceowed cash, chose shares
Sale outside a planthe insider picked the day
Sale under a plandates fixed months before
Says littlecompany plans, board pay, cash units
Bought
none
Sold
13 outside a plan

Every Form 4 line of the last twelve months, counted by kind. The grades come from the filing itself: whether the insider paid cash, whether a plan set the date, whether pay was taken in stock by choice.

Insider trades on the share price

last twelve months

12 marks over twelve months, each in its grade: solid for the stronger signs, hollow or grey for the ones that say little.

PurchasePay in stock, own choiceSale outside a planSale under a planSays little

The blue line is the daily close over twelve months. Each mark is one insider's trades on one day, on that day's price, sized by dollar value. Solid marks are the stronger signs; hollow and grey marks say little. Hover or tap a mark for who, how much and why.

Trades worth a closer look

A purchase stands out when two or more of these hold: a senior insider, several insiders buying within 90 days, a fall of 10% or more in the three months before, or over $1 million. A sale outside a plan is judged the same way. These are the Feed's rules.

Who traded

dollars, twelve months

9 insiders traded. The most: Wilcox William Richard, sale outside a plan $3.3M.

One row per insider, sold to the left and bought to the right, split by grade: the paler part of a bar is the part that says little.

How it compares

every company on the site

Open-market sales, twelve months

Open-market purchases, twelve months

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every Form 4 line

    Purchase: bought on the open market with their own moneyTook pay in stock, own choice: owed cash, chose shares instead; a softer signSale: sold on the open market, not under a plan set in advanceSale, trading plan: under a Rule 10b5-1 plan set up months before, so the date was fixed in advanceGrey lines: plan purchases, pay in stock taken by the whole board or under a company plan, and units paid in cash; they say little about the insider's own view
    TradedInsiderRoleTypeSharesPriceValueFiling
    13 October 2026Wilcox William RichardExecutive Vice PresidentSaleafter a 4% rise over three months · 13% below its one-year high · Form 144 notice 13 October 20261,100$958.21$1.1 millionForm 4
    29 September 2026Frates CatonSr. Executive Vice PresidentSaleafter a 1% fall over three months · 16% below its one-year high · Form 144 notice 29 September 2026801$915.93$733,328Form 4
    29 September 2026Adamo ClaudineExecutive Vice PresidentSaleafter a 1% fall over three months · 16% below its one-year high · Form 144 notice 29 September 20262,200$915.93$2.0 millionForm 4
    23 June 2026Denman Kenneth DDirectorSaleafter a 2% fall over three months · 12% below its one-year high · Form 144 notice 23 June 2026885$957.45$847,345Form 4
    1 April 2026Frates CatonExecutive Vice PresidentSaleafter a 16% rise over three months · 6% below its one-year high · Form 144 notice 1 April 2026700$993.00$695,100Form 4
    9 March 2026Adamo ClaudineExecutive Vice PresidentSaleafter a 13% rise over three months · 5% below its one-year high · Form 144 notice 9 March 2026730$1,003.02$732,205Form 4
    21 January 2026Jones Teresa A.Executive Vice PresidentSaleafter a 4% rise over three months · 9% below its one-year high · Form 144 notice 21 January 2026850$986.26$838,318Form 4
    16 January 2026Decker Susan LDirectorSaleafter a 3% rise over three months · 11% below its one-year high · Form 144 notice 16 January 2026458$955.00$437,390Form 4
    14 January 2026Klauer James CExecutive Vice PresidentSaleafter a 0% fall over three months · 12% below its one-year high · Form 144 notice 14 January 20261,500$939.00$1.4 millionForm 4
    9 January 2026Miller Russell D, miller Family TrustSr. Executive Vice PresidentSaleafter a 1% fall over three months · 14% below its one-year high1,500$916.32$1.4 millionForm 4
    30 December 2025Polit JavierExecutive Vice PresidentSaleafter a 6% fall over three months · 20% below its one-year high · Form 144 notice 30 December 2025558$862.89$481,759Form 4
    29 December 2025Polit JavierExecutive Vice PresidentSaleafter a 5% fall over three months · 19% below its one-year high · Form 144 notice 30 December 20252,049$867.21$1.8 millionForm 4
    7 November 2025Wilcox William RichardExecutive Vice PresidentSaleafter a 6% fall over three months · 14% below its one-year high2,400$930.13$2.2 millionForm 4
    A filing with several lines appears once per line.
    Read morePay taken in stock by the insider's own choice has the filing's footnote, word for word, in the note under it; for the others, hold the pointer on the type. An award filed at no price shows n/a.