COST Insider Trading
COSTCO WHOLESALE CORP /NEW | Retail-Variety Stores
Comprehensive Trading Performance Summary
The investment history of corporate insiders at COSTCO WHOLESALE CORP /NEW provides a unique lens into the internal conviction of the company's leadership. By analyzing SEC Form 4 filings, investors can track how directors and officers are allocating their own capital. High-conviction buying often signals that management believes the current market price significantly undervalues future growth prospects, while strategic selling might occur for personal liquidity or portfolio diversification. Monitoring these shifts in ownership is essential for understanding the alignment between management and shareholders in the Retail-Variety Stores sector.
Transactions on Chart
Open Full Chart| Filing Date | Trade Date | Reporting Person | Relationship | Type | Price | Qty | Total, $ | Owned After | Change, % |
|---|---|---|---|---|---|---|---|---|---|
| 2020-08-17 18:05 | 2020-08-13 | DECKER SUSAN L | Director | SELL | $336.92 | 2,500 | $842,294 | 24,247 | -9.3% |
| 2020-08-07 23:06 | 2020-08-07 | Klauer James C | Officer - Executive Vice President | SELL | $342.72 | 4,000 | $1,370,880 | 49,402 | -7.5% |
| 2020-07-14 20:26 | 2020-07-14 | Murphy James P. | Officer - Executive VP | SELL | $326.00 | 5,000 | $1,630,000 | 32,771 | -13.2% |
| 2020-07-14 18:52 | 2020-07-13 | DECKER SUSAN L | Director | SELL | $326.60 | 2,000 | $653,200 | 26,747 | -7.0% |
| 2020-07-11 03:53 | 2020-07-10 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $325.07 | 2,730 | $887,438 | 20,737 | -11.6% |
| 2020-07-02 21:08 | 2020-07-02 | DECKER SUSAN L | Director | SELL | $308.50 | 685 | $211,323 | 28,747 | -2.3% |
| 2020-07-01 23:53 | 2020-07-01 | DECKER SUSAN L | Director | SELL | $302.57 | 1,155 | $349,473 | 29,432 | -3.8% |
| 2020-06-19 19:32 | 2020-06-19 | Vachris Roland Michael | Officer - Executive VP | SELL | $300.95 | 4,000 | $1,203,806 | 12,284 | -24.6% |
| 2020-06-12 17:52 | 2020-06-11 | Rose Timothy L. | Officer - Executive VP | SELL | $308.05 | 6,000 | $1,848,305 | 23,680 | -20.2% |
| 2020-06-05 19:14 | 2020-06-05 | Callans Patrick J | Officer - Executive VP | SELL | $309.22 | 2,500 | $773,050 | 55,114 | -4.3% |
| 2020-06-05 21:05 | 2020-06-05 | Hines Daniel M. | Other | SELL | $309.31 | 5,000 | $1,546,525 | 15,632 | -24.2% |
| 2020-06-05 23:14 | 2020-06-05 | DECKER SUSAN L | Director | SELL | $312.00 | 1,995 | $622,440 | 30,587 | -6.1% |
| 2020-04-23 19:43 | 2020-04-22 | Murphy James P. | Officer - Executive VP | SELL | $310.00 | 5,000 | $1,550,000 | 37,771 | -11.7% |
| 2020-04-21 19:25 | 2020-04-20 | DECKER SUSAN L | Director | SELL | $314.83 | 1,000 | $314,826 | 32,582 | -3.0% |
| 2020-03-20 22:45 | 2020-03-20 | DECKER SUSAN L | Director | SELL | $297.00 | 1,000 | $297,000 | 33,582 | -2.9% |
| 2020-03-20 01:05 | 2020-03-19 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $306.51 | 1,448 | $443,833 | 23,967 | -5.7% |
| 2020-01-16 01:25 | 2020-01-14 | DECKER SUSAN L | Director | SELL | $300.41 | 3,850 | $1,156,567 | 34,582 | -10.0% |
| 2019-12-18 20:12 | 2019-12-17 | Vachris Roland Michael | Officer - Executive VP | SELL | $295.22 | 6,000 | $1,771,295 | 16,284 | -26.9% |
| 2019-12-18 02:18 | 2019-12-16 | Callans Patrick J | Officer - Executive VP | SELL | $293.99 | 2,000 | $587,987 | 57,679 | -3.4% |
| 2019-11-18 23:25 | 2019-11-15 | DECKER SUSAN L | Director | SELL | $303.01 | 1,703 | $516,032 | 38,432 | -4.2% |
| 2019-11-13 22:48 | 2019-11-13 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $302.80 | 1,984 | $600,763 | 26,165 | -7.0% |
| 2019-11-08 22:24 | 2019-11-08 | Miller Russell D | Officer - Executive Vice President | SELL | $302.83 | 1,000 | $302,833 | 6,324 | -13.7% |
| 2019-11-08 22:23 | 2019-11-08 | MOULTON PAUL G | Officer - Executive VP | SELL | $303.05 | 3,978 | $1,205,525 | 29,565 | -11.9% |
| 2019-10-31 21:25 | 2019-10-30 | LIBENSON RICHARD M | Director, Other | SELL | $298.25 | 1,703 | $507,914 | 38,682 | -4.2% |
| 2019-11-01 02:29 | 2019-10-30 | PORTERA JOSEPH P | Officer - Executive VP | SELL | $299.52 | 14,095 | $4,221,734 | 5,789 | -70.9% |
| 2019-10-24 22:46 | 2019-10-23 | Hines Daniel M. | Other | SELL | $298.46 | 5,000 | $1,492,284 | 20,632 | -19.5% |
| 2019-10-19 01:05 | 2019-10-17 | DECKER SUSAN L | Director | SELL | $302.80 | 2,236 | $677,065 | 39,234 | -5.4% |
| 2019-10-15 18:59 | 2019-10-11 | DECKER SUSAN L | Director | SELL | $297.50 | 333 | $99,068 | 41,470 | -0.8% |
| 2019-10-11 20:15 | 2019-10-11 | MOULTON PAUL G | Officer - Executive VP | SELL | $298.06 | 5,976 | $1,781,186 | 36,010 | -14.2% |
| 2019-07-06 02:18 | 2019-07-03 | DECKER SUSAN L | Director | SELL | $268.25 | 1,646 | $441,540 | 41,803 | -3.8% |
| 2019-06-24 23:24 | 2019-06-24 | Vachris Roland Michael | Officer - Executive VP | SELL | $267.25 | 3,700 | $988,823 | 13,578 | -21.4% |
| 2019-06-21 02:35 | 2019-06-20 | Murphy James P. | Officer - Executive VP | SELL | $265.85 | 10,000 | $2,658,528 | 35,100 | -22.2% |
| 2019-06-21 02:23 | 2019-06-20 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $266.39 | 3,000 | $799,178 | 24,582 | -10.9% |
| 2019-06-11 00:50 | 2019-06-07 | Callans Patrick J | Officer - Executive VP | SELL | $252.15 | 2,000 | $504,308 | 66,479 | -2.9% |
| 2019-06-11 00:05 | 2019-06-07 | Klauer James C | Officer - Executive Vice President | SELL | $255.53 | 5,000 | $1,277,669 | 44,010 | -10.2% |
| 2019-06-11 00:59 | 2019-06-07 | Hines Daniel M. | Other | SELL | $252.60 | 6,000 | $1,515,626 | 22,463 | -21.1% |
| 2019-06-11 02:24 | 2019-06-07 | DECKER SUSAN L | Director | SELL | $254.62 | 2,790 | $710,393 | 43,449 | -6.0% |
| 2019-04-03 00:48 | 2019-04-01 | MEISENBACH JOHN W | Director | BUY | $242.65 | 3,000 | $727,935 | 12,833 | +30.5% |
| 2019-03-28 18:52 | 2019-03-26 | DECKER SUSAN L | Director | SELL | $240.00 | 2,350 | $564,000 | 46,239 | -4.8% |
| 2019-03-13 22:24 | 2019-03-13 | Rose Timothy L. | Officer - Executive VP | SELL | $234.27 | 6,000 | $1,405,624 | 20,974 | -22.2% |
| 2019-03-13 21:55 | 2019-03-12 | DECKER SUSAN L | Director | SELL | $232.00 | 2,049 | $475,368 | 48,589 | -4.0% |
| 2019-03-13 22:06 | 2019-03-12 | MOULTON PAUL G | Officer - Executive VP | SELL | $232.74 | 8,189 | $1,905,934 | 31,508 | -20.6% |
| 2019-03-13 22:10 | 2019-03-11 | PORTERA JOSEPH P | Officer - Executive VP | SELL | $228.51 | 11,765 | $2,688,388 | 13,808 | -46.0% |
| 2019-03-13 22:03 | 2019-03-11 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $230.47 | 4,188 | $965,197 | 28,082 | -13.0% |
| 2019-01-05 02:53 | 2019-01-04 | DECKER SUSAN L | Director | SELL | $206.15 | 1,611 | $332,108 | 50,638 | -3.1% |
| 2019-01-04 01:21 | 2019-01-02 | DECKER SUSAN L | Director | SELL | $205.00 | 739 | $151,495 | 52,249 | -1.4% |
| 2018-11-01 21:15 | 2018-10-30 | GALANTI RICHARD A | Director, Officer - Executive VP and CFO | SELL | $227.23 | 4,163 | $945,940 | 32,270 | -11.4% |
| 2018-10-30 21:28 | 2018-10-29 | JELINEK W CRAIG | Director, Officer - President and CEO | SELL | $223.52 | 22,500 | $5,029,106 | 311,958 | -6.7% |
| 2018-10-26 20:38 | 2018-10-25 | LIBENSON RICHARD M | Director, Other | SELL | $224.00 | 2,049 | $458,976 | 38,682 | -5.0% |
| 2018-10-26 20:37 | 2018-10-25 | LAZARUS FRANZ E | Officer - Executive VP | SELL | $226.76 | 23,000 | $5,215,455 | 30,432 | -43.0% |
How to Interpret $COST Trades
Not every insider transaction in COSTCO WHOLESALE CORP /NEW is a signal for immediate action. Professional investors look for "cluster buying"—when multiple executives simultaneously purchase $COST shares on the open market. It is crucial to distinguish between scheduled sales (under Rule 10b5-1) and voluntary increases in ownership, which demonstrate management’s true conviction that the stock is undervalued.
Data Source & Accuracy for COST
Insider activity data for COSTCO WHOLESALE CORP /NEW is streamed in real-time directly from the SEC EDGAR system. We analyze raw Form 4 filings, filtering out technical adjustments and complex derivative transactions. This provides a transparent view of how ownership structure is evolving in $COST, allowing you to follow the capital of those with the most intimate knowledge of the company.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.