Director Mary Agnes Wilderotter filed a Form 4 with the SEC on October 26, 2026, disclosing the acquisition of 266 restricted stock units of Costco Wholesale Corp /NEW (NASDAQ:COST) on October 22, 2026.

Key Highlights

  • RSU grant: Wilderotter acquired 266 restricted stock units on October 22, 2026, at a price of $0, coded as an acquisition (A).
  • Vesting schedule: The RSUs vest one-third on October 22, 2027, and one-third on October 22 for each of the following two years, according to the filing.
  • Direct holdings after transaction: Wilderotter directly owns 8,526.936 shares of Costco common stock following the reported transaction.
  • Indirect holdings: An additional 4,696 shares are held indirectly through a grantor retained annuity trust designated GRAT-1.
  • Prior GRAT distribution: On July 21, 2026, 5,056 shares of Costco common stock were distributed to Wilderotter as payment of an annuity from GRAT-1, of which she is the sole grantor, trustee, and annuity beneficiary.

RSU Award and Beneficial Ownership Details for Director Wilderotter

According to the Form 4 filed on October 26, 2026, Mary Agnes Wilderotter, identified as a director of Costco Wholesale Corp /NEW (NASDAQ:COST), received a grant of 266 restricted stock units on October 22, 2026. The filing notes the transaction code as "A" (acquired) and lists the price as $0, which the filing's footnotes describe as "not applicable" in the context of an RSU grant. The RSUs are scheduled to vest one-third on October 22, 2027, and one-third on October 22 for each of the two subsequent years.

Following the reported transaction, Wilderotter directly holds 8,526.936 shares of Costco common stock, the filing discloses. She also holds 4,696 shares indirectly through a trust designated as GRAT-1. The filing's footnotes state that on July 21, 2026, 5,056 shares of Costco common stock were distributed to Wilderotter "in payment of an annuity from a grantor retained annuity trust (GRAT-1) of which she is the sole grantor, trustee and annuity beneficiary." That distribution is reflected in the current indirect ownership figure.

The Form 4 was signed by Alejandro Torres, identified as attorney-in-fact, and dated October 26, 2026. The filing indicates this was filed by one reporting person and is not an amendment to a prior filing.

What Was Disclosed

Costco director Mary Agnes Wilderotter disclosed the receipt of 266 restricted stock units on October 22, 2026, vesting over three years. Her total beneficial ownership following the transaction stands at 8,526.936 shares directly and 4,696 shares indirectly through GRAT-1.