Here are the Form 4 insider transactions from Costco Wholesale Corporation (COST) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow COST and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full COST filings page.
Costco Wholesale Corp. executive vice president John Christopher Sullivan acquired 4,552 restricted stock units on October 22, 2026. The award was initially made October 22, 2025, and its fiscal 2026 performance conditions were deemed satisfied by the Compensation Committee.
On October 22, 2026, the company withheld shares for taxes in connection with vesting of previously granted restricted stock units, in five reported transactions. Each transaction used the $1,018.21 closing market price. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% over each of the next four years, based on continued employment; the grant is also eligible for accelerated vesting on Sullivan’s 25th, 30th and 35th service anniversaries.
Costco Wholesale Corp. reported that 260 shares of common stock held directly by Executive Vice President Adam Webb Self were withheld by the company for taxes on October 22, 2026, in connection with vesting of previously granted restricted stock units. The five reported entries use $1,018.21 per share, the closing market price of Costco common stock on Nasdaq that day.
Costco Wholesale Corp. Executive Vice President Javier Polit reported an award acquisition of 4,129 common shares on October 22, 2026. The grant was initially made on October 22, 2025, and the Compensation Committee deemed the fiscal 2026 performance conditions satisfied. The earned awards vest one-third on the first anniversary of the grant date and an additional one-third over each of the ensuing two years, based on continued employment. Costco withheld 1,572 shares for taxes in connection with vesting previously granted restricted stock units; the reported $1,018.21 price was the closing market price on October 22, 2026.
Costco Wholesale Corp. reported that Executive Vice President Gary Millerchip acquired 6,140 restricted stock units on October 22, 2026, under an award initially granted October 22, 2025. The Compensation Committee deemed the fiscal 2026 performance conditions satisfied. The earned awards vest one-third on the first anniversary and an additional one-third over each of the ensuing two years, based on continued employment.
On October 22, 2026, Costco withheld 313.451, 500.323, and 816.968 shares for taxes as previously granted RSUs vested. The stated price was $1,018.21 per share, Costco's closing market price that day.
Costco Wholesale Corp. reported that President and CEO Roland Michael Vachris acquired a restricted stock unit award covering 13,973 shares of common stock, associated with an initial grant dated October 22, 2025; the Compensation Committee deemed the fiscal 2026 performance conditions satisfied. On October 22, 2026, 1,404, 1,121 and 1,131 shares were withheld for taxes as previously granted RSUs vested, each at $1,018.21 per share, Costco common stock’s closing market price on Nasdaq.
Costco Wholesale Corp. director Mary Agnes Wilderotter received a grant of 266 restricted stock units on October 22, 2026. One-third vests on October 22, 2027, and one-third on October 22 for each of the following two years. Her direct common-stock holdings after the grant were 8,527 shares. She also reported 4,696 shares held indirectly by GRAT-1; 5,056 shares had been distributed to her from the trust on July 21, 2026, in payment of an annuity.
Costco Wholesale Corp. director John W. Stanton received 266 restricted stock units on October 22, 2026, in a grant. His reported direct common-stock holdings after the transaction were 24,356 shares. The report also lists 211 indirect shares held by his son and 211 shares held by the Stanton Family Trust.
Costco Wholesale Corp. (COST) granted director Gina Marie Raimondo 266 restricted stock units on October 22, 2026. The units vest one-third on October 22, 2027, and one-third on October 22 for the following two years.
Costco Wholesale Corp. director Jeffrey S. Raikes acquired 266 shares through a restricted stock unit grant on October 22, 2026. The award vests one-third on October 22, 2027, and one-third on October 22 for each of the following two years. Raikes reported 6,310 directly held shares after the grant.
Costco Wholesale Corp. Executive Vice President James C. Klauer reported five common-stock tax-withholding entries on October 22, 2026, tied to vesting of previously granted restricted stock units. The entries were 191, 396, 530, 443 and 542 shares, respectively, each at a reported $1,018.21 per share, the closing market price that day. A separate ownership entry lists 99 common shares held indirectly by his spouse.
Costco Wholesale Corp. director Sarah Mr Sally Jewell acquired 266 restricted stock units as a grant on October 22, 2026. The units vest one-third on October 22, 2027, and one-third annually on October 22 for the following two years. Her directly held common-stock position following the grant was 3,879 shares.
Costco Wholesale Corporation director Hamilton E. James received a grant of 266 restricted stock units on October 22, 2026. The units vest one-third on October 22, 2027, and one-third annually on October 22 for the following two years. After the grant, his directly held Common Stock was 55,804 shares. The reported indirect positions on October 22, 2026, were 230 shares in each of Family Trusts I, II and III, and 461 shares in Family Trust IV.
Costco Wholesale Executive Vice President Sarah Catherine George reported five direct transactions in which 260 shares of common stock were withheld for taxes on October 22, 2026, in connection with vesting of previously granted restricted stock units.
Costco Wholesale Corp. director Helena Foulkes received a grant of 266 restricted stock units on October 22, 2026. Her reported direct common-stock holdings following the grant were 1,353 shares. Her reported holdings also include 32 common shares held indirectly by her spouse and 7 held indirectly by a trust.
Costco Wholesale Corp. director Kenneth D. Denman acquired 266 restricted stock units through a grant dated October 22, 2026. His reported direct position after the grant was 5,045 shares.
Costco Wholesale Corp. (COST) director Susan L. Decker received a grant of 266 restricted stock units on October 22, 2026. Her reported direct position following the transaction was 8,798 shares.
Tiffany Marie Barbre, Costco Wholesale’s Principal Accounting Officer, received a grant of 1,965 restricted stock units on October 22, 2026. On that date, Costco withheld 537 shares for taxes tied to vesting of previously granted units; the reported $1,018.21 price represents Costco common stock’s closing market price on Nasdaq. The grant is eligible for accelerated vesting under the 2019 Stock Incentive Plan.
Costco Wholesale Corp. Executive Vice President Claudine Adamo reported five direct common-stock tax-withholding dispositions on October 22, 2026: 97, 198, 177, 111 and 109 shares. Costco withheld the shares for taxes connected with vesting previously granted restricted stock units. Each transaction was priced at $1,018.21 per share, the closing market price of Costco common stock on Nasdaq that day. No Rule 10b5-1 plan is reported.
Costco Wholesale Corp. Executive Vice President William Richard Wilcox sold 1,100 shares of common stock on October 13, 2026, at $958.2050 per share. The transaction was a direct sale, leaving him with 3,094 shares held directly. No Rule 10b5-1 plan is reported.
Costco Wholesale Corp. Sr. Executive Vice President Caton Frates reported selling 801 shares of common stock on September 29, 2026, at $915.93 per share, in an open market or private transaction. The sale was direct, and Frates reported 7,912 shares afterward. No Rule 10b5-1 plan is reported.
Costco Wholesale Corp. (COST) Executive Vice President Claudine Adamo sold 2,200 shares of common stock on September 29, 2026, at $915.93 per share. Her reported direct holdings after the sale were 7,134 shares. The transaction description allows for an open-market or private transaction. No Rule 10b5-1 plan is reported for the sale.
COSTCO WHOLESALE CORP /NEW (COST) reported that Executive Vice President William Richard Wilcox received an equity award tied to fiscal 2026 performance on September 10, 2026. The award relates to Restricted Stock Units granted October 22, 2025 that vest 20% annually over five years, with potential accelerated vesting under the 2019 Incentive Plan.
COSTCO WHOLESALE CORP (COST) reported that Executive Vice President Yoram Rubanenko had equity compensation activity on September 10, 2026. He acquired 4,129 shares of common stock at no cost in connection with earned awards from a Restricted Stock Unit grant initially made on October 22, 2025, subject to fiscal 2026 performance conditions that were deemed satisfied by the Compensation Committee. On the same date, 1,695.952 shares were delivered or withheld at $902.38 per share for payment of exercise price or tax liability, resulting in a net share increase from this vesting event. The RSU award vests 20% on the first anniversary of the grant date and an additional 20% in each of the following four years based on continued employment, with potential accelerated vesting under the 2019 Incentive Plan at 25, 30, and 35 years of service.
COSTCO WHOLESALE CORP /NEW (COST) reported that Executive Vice President Pierre Riel received an award of 4,552 shares of common stock on September 10, 2026, reflecting earned performance-based Restricted Stock Units originally granted on October 22, 2025. On the same date, 1,561.66 shares of common stock were delivered or withheld at $902.38 per share for payment of exercise price or tax liability. The earned awards vest 20% on the first anniversary of the October 22, 2025 grant date and an additional 20% over each of the following four years, subject to continued employment, with potential accelerated vesting under the company’s 2019 Incentive Plan based on long-term service milestones. No Rule 10b5-1 trading plan is reported for these transactions.
COSTCO WHOLESALE CORP (COST) reported that Executive Vice President James C. Klauer received a grant of 4,129 Restricted Stock Units tied to fiscal 2026 performance, deemed earned by the Compensation Committee. The award vests 20% on the first anniversary of the October 22, 2025 grant date and 20% in each of the next four years, subject to continued employment and potential accelerated vesting under the 2019 Incentive Plan. On September 10, 2026, 936.115 shares of common stock were delivered or withheld to pay the exercise price or tax liability, and Klauer also reports 98.5 shares held indirectly by his spouse. No Rule 10b5-1 trading plan is reported.
COSTCO WHOLESALE CORP /NEW (COST) reported that Executive Vice President Teresa A. Jones received a grant related to 4,129 shares of common stock on September 10, 2026, tied to performance-based awards initially granted on October 22, 2025 for fiscal 2026. The earned awards vest 20% on the first anniversary of the original grant date and 20% in each of the next four years, subject to continued employment, with potential accelerated vesting under the 2019 Incentive Plan. On the same date, 1,458.535 shares of common stock were delivered or withheld at $902.38 per share for payment of exercise price or tax liability. No Rule 10b5-1 trading plan is reported.
COSTCO WHOLESALE CORP /NEW (COST) reported that Executive Vice President Caton Frates received a compensation-related equity award on September 10, 2026. The award covers 4,552 Restricted Stock Units tied to prior performance for fiscal 2026, with 20% vesting on the first anniversary of the October 22, 2025 grant date and an additional 20% vesting in each of the following four years, subject to continued employment. Under the company’s 2019 Incentive Plan, employees may also be eligible for accelerated vesting at their 25th, 30th and 35th service anniversaries. On the same date, 1,654.363 shares of common stock were delivered or withheld at $902.38 per share for payment of exercise price or tax liability.
COSTCO WHOLESALE CORP (COST) reported that Executive Vice President Claudine Adamo had performance-based restricted stock units earned from a grant initially made on October 22, 2025, for fiscal 2026, with 4,129 shares of common stock credited on September 10, 2026 at no cost. On the same date, 916.685 shares were delivered or withheld to pay the exercise price or tax liability, and the remaining earned awards vest 20% on the first anniversary of the grant date and 20% annually over the next four years, subject to continued employment and potential accelerated vesting under the 2019 Incentive Plan. No Rule 10b5-1 trading plan is reported.
COSTCO WHOLESALE CORP /NEW director Jeffrey S. Raikes transferred 5,249 Common Stock shares as a bona fide gift to a non-profit foundation on 2026-07-10 at a stated price of $0.0000 per share. Following this charitable transfer, he holds 6,043.936 shares directly.
Costco Wholesale Corp. director Kenneth D. Denman reported an open-market sale of 885 shares of Costco common stock on June 23, 2026. The shares were sold at a weighted average price of $957.4525 per share, with individual trade prices ranging from $957.44 to $957.63 per share. After this transaction, Denman directly holds 4,778.936 shares of Costco common stock.
Costco Wholesale Corp. Executive Vice President Caton Frates sold 700 shares of Common Stock in an open-market transaction at $993.00 per share. After this sale, he directly holds 5,815.001 shares. This was a single, non-derivative sale and no option exercises or derivative transactions were reported.
COSTCO WHOLESALE CORP /NEW Executive Vice President Sarah Catherine George reported a discretionary, intra-plan transaction involving company common stock held in a 401(k) plan. She moved 642.1252 shares out of Costco's common stock fund, following a company policy that bars executive officers from participating in that fund. After this transfer, she no longer holds Costco shares indirectly through the 401(k) plan and now reports 1,401.258 Costco common shares held directly.
Costco Wholesale Corporation executive Gary Millerchip reported a routine tax-related share withholding. On March 11, 2026, 1,154.017 shares of Costco common stock were withheld by the company to cover taxes tied to the vesting of previously granted restricted stock units, at a reference price of $992.23 per share. Following this transaction, Millerchip directly owned 15,465.301 shares of Costco common stock. This was not an open-market sale, but a standard mechanism to satisfy tax obligations on equity compensation.
Costco Wholesale Corporation executive Claudine Adamo reported an open-market sale of company stock. On March 9, 2026, the Executive Vice President sold 730 shares of Costco common stock at an average price of $1003.021 per share. After this transaction, she directly owns 6,121.195 Costco shares.
Costco Wholesale Corp. director Jeffrey S. Raikes reported a charitable stock gift. On 01/27/2026, he transferred 5,115 shares of Costco common stock using transaction code "G," which indicates a gift made at a reported price of $0 per share.
After this donation to a non-profit foundation, Raikes directly beneficially owned 11,292.936 Costco common shares. The filing reflects a reduction in his direct holdings due to a philanthropic transfer rather than an open-market sale.
Costco Wholesale Corporation Executive Vice President Teresa A. Jones reported a charitable stock gift. On January 27, 2026, she transferred 300 shares of Costco common stock as a gift coded "G" at a reported price of $0 per share to a charitable donor advised fund.
Following this transaction, Jones reported beneficial ownership of 3,927.804 shares of Costco common stock held directly. The filing reflects a personal charitable donation rather than an open‑market sale or purchase.
Costco Wholesale Corporation executive Teresa A. Jones sold company stock in an open-market transaction. On January 21, 2026, she sold 850 shares of Costco common stock, with a reported weighted average price of $986.2567 per share.
The sale was executed through multiple trades, with individual prices ranging from $986.220 to $986.480 per share. After this transaction, Jones beneficially owned 4,227.804 shares of Costco common stock in direct ownership.
Costco Wholesale Corporation director Susan L. Decker reported a sale of company stock. On January 16, 2026, she sold 458 shares of Costco common stock at a price of $955 per share, as shown in a Form 4 insider trading report.
After this transaction, Decker beneficially owned 8,531.936 shares of Costco common stock in direct ownership form. The filing classifies her relationship to Costco as a director and confirms that this report covers a single reporting person.
Costco Wholesale Corporation director Gina Marie Raimondo reported an equity award in the form of restricted stock units tied to Costco common stock. On 01/16/2026 she was granted 215 units at a stated price of $0 per share, reflecting a compensatory grant rather than an open-market purchase.
These restricted stock units vest over three years, with one-third scheduled to vest on October 22, 2026 and the remaining two thirds vesting in equal annual installments on October 22 in each of the following two years. Following this grant, she beneficially owns 215 Costco common shares in direct form.
Costco Wholesale Corporation Executive Vice President James C. Klauer reported a sale of company stock. On January 14, 2026, he sold 1,500 shares of Costco common stock at a price of $939 per share, coded as a sale transaction. After this trade, he directly holds 44,836.994 shares of Costco common stock. The filing also shows an additional 98.5 shares held indirectly, listed as held "By Spouse." The report is filed by one reporting person and reflects changes only in non-derivative common stock holdings, with no derivative securities reported.
Costco Wholesale Corp. insider activity: A trust associated with Sr. Executive Vice President Russell D. Miller reported selling 1,500 shares of Costco common stock on 01/09/2026 at $916.32 per share. After this transaction, the Miller Family Trust held 8,240 shares indirectly, and Miller also reported a small direct holding of 0.925 share of Costco common stock.
Costco Wholesale Corp. (COST) director reports a stock gift. A company director filed a Form 4 disclosing a bona fide gift of 2,827 shares of Costco common stock on 12/15/2025, reported under transaction code "G." The shares were transferred at a price of $0, reflecting that this was a gift, not an open-market sale.
After this transaction, the director beneficially owns 8,989.936 Costco shares in direct ownership. The filing is an administrative disclosure of an insider’s change in holdings rather than an operational or earnings-related event for the company.