NASDAQ:COST 31 December 2025 - 9 January 2026

Jan 9, 2026, 05:17 EST — Premarket Costco Wholesale Corp’s shares rose 3.7% on Thursday to $915.31 after the warehouse retailer reported December sales results. Yahoo Finance+1

New York, Jan 8, 2026, 16:46 EST — After-hours Costco Wholesale Corp shares rose in after-hours trade on Thursday after the warehouse retailer reported higher December sales. The stock was last up 3.7% at $915.31.

New York, Jan 7, 2026, 17:59 EST — After-hours Costco Wholesale Corp shares dipped 0.7% to $882.58 in after-hours trading on Wednesday after the warehouse retailer posted an 8.5% rise in December net sales to $29.86 billion. Comparable sales rose 7.0% in the five-week period ended Jan. 4, while digitally-enabled sales, a company metric that includes online orders, climbed 18.9%. GlobeNewswire

New York, January 6, 2026, 18:45 EST — After-hours Costco Wholesale Corp shares rose on Tuesday, extending a bounce after a broker upgrade as investors looked ahead to a closely watched monthly sales update.

New York, January 6, 2026, 12:01 — Regular session Costco Wholesale Corporation shares rose on Tuesday, gaining $9.15, or about 1.0%, to $884.89 in midday trading.

New York, January 5, 2026, 12:00 — Regular session Costco Wholesale Corp was up 2.2% at $873.54 in midday trading on Monday, after closing at $854.50 in the previous session.

NEW YORK, Jan 4, 2026, 11:18 ET — Market closed Costco Wholesale Corporation shares slipped 0.9% on Friday to close at $854.50, a soft start to 2026 for the warehouse club operator. U.S. markets are closed for the weekend, leaving investors looking to the company’s next sales update for direction. Investing

NEW YORK, Jan 3, 2026, 11:09 ET — Market closed Costco Wholesale Corp shares ended Friday down 0.9% at $854.50, ahead of the warehouse retailer’s closely watched December sales update next week. The stock traded between $852.59 and $865.23 in the session. Costco

NEW YORK, Jan 2, 2026, 11:08 ET — Regular session Costco Wholesale Corp shares fell 0.5% to $857.91 in morning trade on Friday, giving back ground as U.S. stocks began 2026 on firmer footing.

Costco stock slipped on Friday as Telsey Advisory Group reiterated its Outperform rating — a call for the shares to beat the broader market — and kept a $1,100 price target ahead of the retailer’s December sales report. The brokerage expects comparable sales to rise 2.2% for the month, down sharply from a year earlier, Investing.com reported. Investing The January 7 update is one of the first holiday read-outs among major U.S. retailers and is closely watched because Costco publishes monthly sales results in addition to quarterly earnings.

NEW YORK, January 1, 2026, 10:52 ET — Market closed. Costco Wholesale Corporation shares last closed down 0.4% at $862.34, after trading between $861.42 and $867.76 in the year’s final session on Wednesday. U.S. stock markets are closed on Thursday for the New Year’s Day holiday.

Costco Wholesale shares edged lower in thin year-end trading on Wednesday as investors looked ahead to the retailer’s next update: a monthly sales report due in early January. The move was modest, but the timing matters. Costco’s December sales snapshot will be one of the first reads on holiday-season demand as investors recalibrate expectations for U.S. consumers in 2026.

NEW YORK, December 31, 2025, 17:53 ET — After-hours Costco Wholesale Corp shares dipped in after-hours trading on Wednesday, tracking a softer year-end tape as a regulatory filing disclosed stock sales by a top executive. The shares were down about 0.4% at $862.34. SEC

NEW YORK, December 31, 2025, 14:14 ET — Regular session Costco Wholesale Corporation shares were slightly lower on Wednesday as Wall Street eased in the final trading session of 2025.