December sales rose 8.5%, lifting COST to its best session since April and a one-month stock high.

  • Costco reported that sales in December were $29.6 billion, up 8.5%, and net sales for the first 18 weeks of its fiscal 2026 were $101.83 billion.
  • Telsey Advisory Group analyst Joseph Feldman said that online continues to benefit from expanding the assortment, same-day delivery, effective marketing, and faster fulfillment.
  • According to Adobe Analytics data, consumers spent $257.8 billion online from Nov. 1 to Dec. 31, up 6.8% year-over-year.

Retailers have had a volatile year on multiple fronts, from ballooning costs driven by U.S. President Donald Trump's tariffs on global trading partners to a pullback in consumer spending following price hikes across the sector.

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Costco Wholesale, in particular, has faced an uphill battle, grappling with tariffs, cuts to SNAP benefits (formerly known as "food stamps"), and a legal dispute with the Trump administration over duties imposed last year.

Despite those headwinds, COST's stock entered 2026 with renewed momentum, hitting a one-month high of $915.31 after jumping 3.7% on Thursday, its best session since April of last year. The move followed Costco's sales update released after markets closed on Wednesday.

Costco reported December sales of $29.6 billion, up 8.5% for the five weeks ended Jan. 4, driven by a strong holiday season. The membership-only retailer also said net sales for the first 18 weeks of fiscal 2026 reached $101.83 billion, an 8.3% increase from a year earlier.

Wall Street’s View On COST

Telsey Advisory Group analyst Joseph Feldman said traffic increased 2.7% in December as consumers continue to seek value and turn to Costco for its bundled, cheaper products. The average ticket increased 4.2%, helped by strength across the store and modest inflation, driven by tariffs, the analyst added.

Feldman added that online sales continue to benefit from a broader assortment, same-day delivery, effective marketing, and faster fulfillment. He added that Costco continues to execute well in this uncertain operating environment and expects the company to remain a profitable share gainer, with its solid sales and high membership renewal rates.

Earlier this week, Mizuho upgraded Costco to ‘outperform’ from ‘neutral’ with a price target of $1,000, up from $950, according to TheFly. The brokerage added the stock to its "Top Picks" list and noted that even though shares have corrected 20% on concerns that both the company's membership and comparable sales growth are slowing, it believes that Costco's trade-up activity is accelerating, with first-quarter premium members adding two to three times that of total membership.

Holiday Season

According to Adobe Analytics, consumers spent a record $257.8 billion online between Nov. 1 and Dec. 31, up 6.8% year over year. During the period, 25 separate days saw online spending top $4 billion.

The holiday season was powered by a strong Cyber Week, which generated $44.2 billion in online sales, up 7.7% from last year. Adobe said aggressive discounting helped keep online consumer demand resilient.

Adobe also noted a sharp rise in traffic from generative AI tools, which jumped 693.4% year over year, highlighting the growing role of the red-hot tech in online shopping behavior.

How Are Stocktwits Users Reacting?

Retail sentiment on Costco improved to ‘neutral’ from ‘bearish’ a day ago, with message volumes at ‘high’ levels, according to data from Stocktwits.

Source: Stocktwits

Shares of Costco have lost 1% of their value in the last 12 months.

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