NASDAQ
Costco Wholesale Corporation (COST) has had 7 insider transactions recently, with net insider activity of -$10K (net selling). The most active insider is RAIKES JEFFREY S (Director).
Total Transactions
7
1 buys /6 sells
Shares Acquired
215
Transactions: 1•Avg: 215
Shares Disposed
9,723
Transactions: 6•Avg: 1,620.5
Net Activity
-9,508
Net Selling•Ratio: 16.67%
Q1 2026(Current) | 215 | 9,723 | -9,508 | 16.67% |
Q4 2025 | 33,381 | 29,216.63 | +4,164.37 | 28.89% |
Q3 2025 | 37,751 | 29,944.38 | +7,806.62 | 66.67% |
Q2 2025 | 0 | 9,547 | -9,547 | 0.00% |
Q1 2025 | 0 | 7,597.26 | -7,597.26 | 0.00% |
This table shows insider trading activity by quarter. A ratio > 100% indicates insiders acquired more shares than they disposed of during the period, which is generally considered a bullish signal.
• Most recent data for Q1 2026
Acquired vs Disposed Shares
Net Distribution: 9,508 shares•Acquired/Disposed Ratio: 16.67%
Net Activity | |||||
|---|---|---|---|---|---|
RJS RAIKES JEFFREY S | Director | 4 | 286 | 15,808 | -15,522 |
VRM Vachris Roland Michael | Director, officer: president and ceo | 3 | 13,834 | 2,652.8 | +11,181.2 |
MG MILLERCHIP GARY | Officer: executive vice president | 4 | 6,268 | 1,913.37 | +4,354.63 |
DSL DECKER SUSAN L | Director | 5 | 286 | 3,832 | -3,546 |
KJC Klauer James C | Officer: executive vice president | 10 | 4,317.5 | 7,375.64 | -3,058.14 |
This table shows the trading activity of the most active company insiders. Positive net activity (buying more than selling) is often considered a bullish signal.
2026-01-27 | Director | Sale | 5,115 | $0 | $0 | 11,292.94 | |
2026-01-27 | Officer: executive vice president | Sale | 300 | $0 | $0 | 3,927.8 | |
2026-01-21 | Officer: executive vice president | Sale | 850 | $986.26 | $838,318.2 | 4,227.8 | |
2026-01-16 | Director | Sale | 458 | $955 | $437,390 | 8,531.94 | |
2026-01-16 | Director | Purchase | 215 | $0 | $0 | 215 |
This table displays recent Form 4 filings showing transactions by company insiders. SEC rules require insiders to report their transactions within two business days.
RJS RAIKES JEFFREY S | Director | Jan 28, 2026 | |
JTA Jones Teresa A. | Officer: executive vice president | Jan 28, 2026 | |
JTA Jones Teresa A. | Officer: executive vice president | Jan 23, 2026 | |
DSL DECKER SUSAN L | Director | Jan 20, 2026 | |
RGM Raimondo Gina Marie | Director | Jan 20, 2026 |
Net change in shares shown on right
No price data available for this timeframe.