Costco Wholesale Corporation (COST) Events

Filings that contain financial statements

Results for the following periods are contained directly in the Exhibit 99.1 press releases of these Form 8-Ks (each includes condensed consolidated statements of income, balance sheets, and cash flow statements):

• Quarter ended May 10, 2026 (Q3 FY2026), 8-K filed May 28, 2026, accession

0000909832-26-000046.

• Quarter ended February 15, 2026 (Q2 FY2026), 8-K filed March 5, 2026, accession

0000909832-26-000025.

• Quarter ended November 23, 2025 (Q1 FY2026), 8-K filed December 11, 2025, accession

0000909832-25-000164.

• Fourth quarter and fiscal year ended August 31, 2025 (Q4/FY2025), 8-K filed

September 25, 2025, accession 0000909832-25-000093.

• Quarter ended May 11, 2025 (Q3 FY2025), 8-K filed May 29, 2025, accession

0000909832-25-000031.

• Quarter ended February 16, 2025 (Q2 FY2025), 8-K filed March 6, 2025, accession

0000909832-25-000012.

Quarterly operating results

Costco has posted consistent high-single-digit to low-double-digit revenue growth and accelerating comparable sales through fiscal 2025 and into fiscal 2026:

• Q2 FY2025 (reported March 6, 2025, accession 0000909832-25-000012): net sales of

$62.53 billion, up 9.1%; net income of $1,788 million ($4.02 diluted EPS) versus $1,743 million ($3.92) a year earlier. Total-company comparable sales were +6.8% (+9.1% excluding gas and FX).

• Q3 FY2025 (reported May 29, 2025, accession 0000909832-25-000031): net sales of $61.96

billion, up 8.0%; net income of $1.90 billion ($4.28 diluted EPS) versus $1.68 billion ($3.78).

• Q4 and full fiscal year 2025 (reported September 25, 2025, accession

0000909832-25-000093): fourth-quarter net sales of $84.4 billion, up 8.0%; full-year net sales of $269.9 billion, up 8.1%. Fourth-quarter net income was $2.610 billion ($5.87 diluted EPS) versus $2.354 billion ($5.29); full-year net income was $8.099 billion ($18.21 diluted EPS) versus $7.367 billion ($16.56) in fiscal 2024.

• Q1 FY2026 (reported December 11, 2025, accession 0000909832-25-000164): net sales of

$65.98 billion, up 8.2%; net income of $2,001 million ($4.50 diluted EPS) versus $1,798 million ($4.04). Results included a $72 million ($0.16/share) tax benefit tied to stock-based compensation, versus a $100 million ($0.22/share) benefit a year earlier.

• Q2 FY2026 (reported March 5, 2026, accession 0000909832-26-000025): net sales of

$68.24 billion, up 9.1%; net income of $2,035 million ($4.58 diluted EPS) versus $1,788 million ($4.02). The same release reported February 2026 (four-week) sales of $21.69 billion, up 9.5%, noting the Lunar New Year calendar shift lifted Other International and total-company comparable sales by roughly 4.0% and 0.5%, respectively.

• Q3 FY2026 (reported May 28, 2026, accession 0000909832-26-000046): net sales of $69.15

billion, up 11.6%; net income of $2.19 billion ($4.93 diluted EPS) versus $1.90 billion ($4.28). Total-company comparable sales were +9.8% reported (+6.6% excluding gas and FX), and digitally-enabled comparable sales rose 21.5%.

Costco also files monthly retail sales results between quarterly reports. The most recent, covering the five weeks ended July 5, 2026 (reported July 8, 2026, accession 0000909832-26-000060), showed net sales of $29.24 billion, up 10.6% year over year, with total-company comparable sales of +8.8% and 44-week fiscal-year-to-date net sales of $250.43 billion, up 10.1%.

Capital returns

• April 16, 2025 (accession 0000909832-25-000023): the Board of Directors raised the

quarterly cash dividend to $1.30 per share from $1.16, a 12% increase ($5.20 annualized), payable May 16, 2025.

• July 16, 2025 (accession 0000909832-25-000061) and October 15, 2025 (accession

0000909832-25-000105): quarterly cash dividend reaffirmed at $1.30 per share.

• January 15, 2026 (accession 0000909832-26-000016): quarterly cash dividend reaffirmed

at $1.30 per share, declared in conjunction with the annual shareholder meeting (see below).

• April 15, 2026 (accession 0000909832-26-000041): the Board raised the quarterly cash

dividend to $1.47 per share from $1.30, a 13% increase ($5.88 annualized), payable May 15, 2026.

• July 8, 2026 (accession 0000909832-26-000060): quarterly cash dividend reaffirmed at

$1.47 per share, payable August 7, 2026.

Corporate governance

At its January 15, 2026 annual meeting of shareholders (8-K filed January 21, 2026, accession 0000909832-26-000016), Costco shareholders elected all ten director nominees, ratified KPMG LLP as independent auditor for fiscal 2026, and approved the advisory vote on executive compensation. A shareholder proposal requesting a greenwashing risk audit was not approved.

Leadership changes

• June 10, 2025 (accession 0000909832-25-000036): Dan Hines announced his retirement as

Senior Vice President, Corporate Controller and Principal Accounting Officer, effective January 2026 after 35 years with the company. Tiffany Barbre, previously Vice President, Assistant Corporate Controller, was appointed Senior Vice President, Corporate Controller and Principal Accounting Officer effective July 1, 2025.

• August 4, 2025 (accession 0000909832-25-000064): Russ Miller, Senior Executive Vice

President and COO – U.S. and Mexico Operations, announced his retirement effective February

1. Caton Frates, then Executive Vice President and COO of the Southwest Division, was

named to succeed him as Senior Executive Vice President, Warehouse Operations – U.S. and Mexico, effective February 2026.