COST COSTCO WHOLESALE CORP /NEW Insider Trading

Frates Caton (EVP) sold 700 COST shares at $993.00 (total $695,100) on 2026-04-01, reducing holdings to 5,815 shares (-10.7%).

Frates Caton sold 700 COST shares at $993.00 on 2026-04-01, a discretionary open-market transaction that reduced his holdings by 10.7% to 5,815 shares. At his prior COST sales, the insider's timing record is weak—only 1 of 5 prior sells resulted in negative 90-day returns, suggesting the stock has generally risen after his exits. His cross-ticker track record shows a 20.00% well-timed rate across all open-market sells, which is modest. COST currently trades at $996.56, near the transaction price, and the stock has delivered +15.6% over the 90-day period preceding this sale. The sell occurs with the company posting solid recent fundamentals: annual revenue growth of +8.2%, quarterly revenue of $17.8B, and net income of $306.0M, though the elevated P/E of 51.72 reflects the company's premium valuation.

EVP Adamo Claudine sold 730 COST shares at $1,003.02; price now $992.23 vs 52-week high of $1,056.85

Adamo Claudine sold 730 shares of Costco on 2026-03-09 at $1,003.02, reducing her holdings by 10.7% to 6,121 shares. The sale occurred near Costco's 52-week high of $1,056.85 (only 6.1% below), though the current price of $992.23 is now 1.1% below the sale price. Her prior five sales at Costco occurred across a 2.5-year span with mixed post-trade performance: 90-day returns ranged from +4.3% to +26.6%, and zero of these five prior sales were well-timed (stock rose after each). Cross-ticker, her 5 prior sells averaged +12.2% over 90 days with a 0.00% well-timed rate. The sale represents a routine, moderate-sized reduction of a large executive position at a mature company trading at a P/E of 51.49 with $17.8B quarterly revenue and +8.2% annual growth, but the pattern of poorly-timed prior sells and the absence of any timing advantage in her historical activity reduces the signal strength of this transaction.

EVP Teresa A. Jones sold 850 COST shares at $986.26; held 4,227 post-sale as COST trades 8.7% below 52-week high.

Jones sold 850 shares (16.7% of her pre-transaction holdings) at $986.26 on 2026-01-21. The sale reduces her stake to 4,227 shares. At her prior trades at COST, one of two sales was well-timed at the 90-day mark; her cross-ticker history shows a 50.00% well-timed rate across 2 prior sells. The current price of $983.25 is 8.7% below the 52-week high of $1076.86, though the stock has gained 12.8% over the past 30 days and 5.5% over 90 days. Costco's fundamentals remain solid with $17.8B quarterly revenue and 8.2% annual growth, though the 52.58 P/E reflects elevated valuation expectations. The transaction size and pattern warrant monitoring against Costco's ongoing execution.

Klauer (EVP) sold 1,500 COST shares at $939.00 on 2026-01-14; holds 44,836 shares post-transaction.

James C Klauer, Executive Vice President of Costco, sold 1,500 shares at $939.00 on 2026-01-14 for $1,408,500.00, reducing holdings by 3.2% to 44,836 shares. The current stock price of $956.75 is 11.2% below its 52-week high of $1076.86, and the stock has appreciated 11.2% over the past 30 days. At the same-ticker level, Klauer's prior two sales at COST occurred on 2025-04-17 (followed by 30d +4.6%, 90d -3.0%) and 2023-10-11 (followed by 30d +2.7%, 90d +18.7%), showing mixed timing results with 1 of 2 well-timed at the 90-day mark. The current sale does not appear to have been preceded by material deterioration in fundamentals—Costco reported $17.8B in latest quarterly revenue, $306.0M net income, 8.2% annual revenue growth, and a 51.16 P/E ratio. The transaction represents a routine open-market sale by a senior executive maintaining substantial ongoing holdings.

Sr. EVP Russell D Miller sold 1,500 COST shares at $916.32; stock now at $943.08, -12.4% from 52-week high.

Russell D Miller, Sr. Executive Vice President of Costco, sold 1,500 shares on 2026-01-09 at $916.32, reducing his holdings to 8,240 shares (8.2K shares) from 9,740 shares (9.7K shares). The sale occurred when the stock was trading 12.4% below its 52-week high of $1,076.86, and the current price of $943.08 stands just 2.9% above the transaction price. At Costco specifically, Miller's prior three trades show mixed timing outcomes: his 2023-11-03 and 2024-10-11 sells preceded positive 90-day returns (+26.3% and +4.1% respectively), while his 2025-09-29 sale preceded a 90-day decline of -4.6%, resulting in a 1-of-3 well-timed rate at this ticker. Costco's valuation remains elevated at a P/E of 50.43 despite solid fundamentals (annual revenue growth +8.2%, Q latest revenue $17.8B, market cap $418.6B), and the 30-day post-transaction return of +6.6% suggests modest near-term momentum unrelated to the sale.

EVP Javier Polit sold 2,607 shares of COST for $2,258,662.45 in two transactions on 2025-12-29/30.

Javier Polit, Executive Vice President of Costco, executed two separate sales totaling 2,607 shares for $2,258,662.45 at prices of $867.21 and $862.90, reducing his holdings by 20.4% to 10,189 shares. The stock is currently trading at $862.34, down 19.9% from its 52-week high of $1076.86 and down 5.4% over the past 30 days. Polit's cross-ticker track record shows 1 prior buy with a positive 90-day average return of 0.3%, though this historical context is limited and ticker-specific comparisons are not available. The sale occurred near depressed valuations relative to recent highs but aligns with Costco's elevated P/E of 46.11 and recent price weakness in a broader market environment.

EVP Wilcox sells 2,400 COST shares at $930.13 for $2.2M; retains 2,000 shares post-sale

William Richard Wilcox, Executive Vice President, sold 2,400 shares of COSTCO WHOLESALE CORP /NEW at $930.13 on 2025-11-07, reducing his holdings from 4,400 to 2,000 shares (a 54.5% reduction in position size). The transaction occurred when COST traded $930.13, which is currently 15.1% below the 52-week high of $1,076.86 and 1.8% above the current price of $914.00. Costco's fundamentals remain strong with annual revenue growth of 8.2%, a P/E of 47.24, and quarterly net income of $306.0M against $17.8B in quarterly revenue. The sale represents a material reduction in an executive officer's direct holding but requires context to assess intent—whether this reflects portfolio rebalancing, liquidity needs, or a view on valuation, the facts alone do not permit attribution of motive.

Costco exec Tiffany Marie Barbre sold 1,239 shares at $934.62; stock now $932.14, down 13.4% from 52-week high.

Barbre sold 1,239 shares of COSTCO WHOLESALE CORP /NEW (COST) at $934.62 on 2025-10-24, reducing her holdings from 6,394 to 5,155 shares. The transaction occurred near current price levels ($932.14), with the stock down 13.4% from its 52-week high of $1,076.86. COST trades at a P/E of 48.17 on $306.0M quarterly net income and $17.8B quarterly revenue with 8.2% annual revenue growth. The sale represents a single, discrete transaction without prior disclosed pattern at this ticker in the FACTS section. Investors should monitor whether additional insider activity follows, but this isolated sale does not establish a material signal on its own.

Adamo (EVP) sold 2,700 COST shares at $935.68; holds 6,851 post-transaction (-28.3% reduction).

Adamo sold 2,700 shares for $2,526,336.00 on 2025-10-24, reducing her COST position by 28.3%. Her prior COST trades show a mixed timing record: the last four sales at this ticker yielded 90-day returns of +5.8%, +6.3%, +18.3%, and +26.6%—all positive, meaning the stock rose after those sales (0 of 4 well-timed at 90 days). The current sale occurred when COST was -13.4% from its 52-week high, and the stock has declined -1.4% in 30 days since execution. Against her cross-ticker track record (0.00% 90-day well-timed rate across 4 prior sells with +14.2% average 90d return), the pattern suggests prior sells preceded rallies rather than declines. This transaction represents a material reduction in her holdings but lacks clear directional signal given the company's solid fundamentals (revenue $17.8B, net income $306.0M, +8.2% annual growth, P/E 48.17).

SVP Russell Miller sold 3,381 COST shares at $915.00 (9/29), reducing stake to 9,740 shares; stock now down 2.8% in 30d and 7.1% in 90d.

Miller Russell D, Sr. Executive Vice President, sold 3,381 shares at $915.00 on 2025-09-29, reducing his holdings by -25.8% from 13,121 to 9,740 shares for a total value of $3,093,615.00. Since the transaction, the stock has declined 2.8% over 30 days and 7.1% over 90 days from the sale price. His prior trades at COST (2 sells in 2023 and 2024) both resulted in positive 90-day returns of 26.3% and 4.1%, meaning the stock rose after those sales—a pattern of poorly-timed exit points. The current sale occurs with the stock at $917.34, roughly -14.8% from its 52-week high, suggesting execution near a relative peak in early fall. COST trades at a P/E of 51.86 with quarterly revenue of $17,780,000,000.00 and recent annual growth of +5.0%.