SEC Form 4 · Updated Daily
COST
— COSTCO WHOLESALE CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| SINEGAL JAMES D | Director | 746,209 | 2017-09-19 | J |
| WALKER THOMAS KIRK | Officer | 249,743 | 2013-12-11 | G |
| JELINEK W CRAIG | Director | 204,365.06 | 2024-12-19 | G |
| MUNGER CHARLES T | Director | 168,104 | 2023-10-22 | A |
| DICERCHIO RICHARD D | Director | 128,030 | 2011-06-14 | S |
| BROTMAN JEFFREY H | Director · Officer | 73,894 | 2017-06-02 | G |
| Vachris Roland Michael | Director · Officer | 66,231.058 | 2026-10-22 | A |
| Callans Patrick J | Officer | 61,571.558 | 2025-10-22 | F |
| JAMES HAMILTON E | Director | 55,803.936 | 2026-10-22 | A |
| McKay John D | Officer | 55,761 | 2018-10-02 | A |
| SCHUTT DOUGLAS W | Officer | 53,653 | 2016-10-22 | F |
| Sullivan John Christopher | Officer | 50,184.692 | 2025-10-22 | A |
| Klauer James C | Officer | 47,839.201 | 2026-10-22 | F |
| GATES WILLIAM H II | Reporting Owner | 45,000 | 2015-04-06 | G |
| Murphy James P. | Director | 41,831 | 2022-10-22 | F |
| Rose Timothy L. | Officer | 35,563 | 2022-09-12 | A |
| MOULTON PAUL G | Officer | 32,047 | 2021-09-14 | A |
| GALANTI RICHARD A | Director · Officer | 27,400 | 2024-10-24 | S |
| STANTON JOHN W | Director | 24,355.936 | 2026-10-22 | A |
| MILLERCHIP GARY | Officer | 21,605.301 | 2026-10-22 | A |
| PETTERSON DAVID S | Reporting Owner | 20,926 | 2016-12-28 | S |
| ZOOK DENNIS R | Officer | 18,680 | 2018-10-02 | A |
| RUCKELSHAUS JILL S | Reporting Owner | 18,566 | 2016-07-26 | S |
| CARSON BENJAMIN SR | Director | 17,972 | 2015-02-27 | A |
| PORTERA JOSEPH P | Officer | 16,137 | 2021-09-14 | A |
| Riel Pierre | Officer | 15,807.885 | 2026-09-10 | A |
| EVANS DANIEL J | Director | 14,611 | 2017-10-22 | A |
| MEISENBACH JOHN W | Director | 13,734 | 2019-10-22 | A |
| LAZARUS FRANZ E | Officer | 13,510 | 2019-09-18 | A |
| Hines Daniel M. | Reporting Owner | 13,140.52 | 2024-10-22 | A |
| Rubanenko Yoram | Officer | 12,376.119 | 2026-09-10 | A |
| POLIT JAVIER | Officer | 10,747.897 | 2025-12-29 | S |
| DECKER SUSAN L | Director | 8,797.936 | 2026-10-22 | A |
| Wilderotter Mary Agnes | Director | 8,526.936 | 2026-10-22 | A |
| Miller Russell D | Officer | 8,240 | 2026-01-09 | S |
| Jones Teresa A. | Officer | 8,056.804 | 2026-09-10 | A |
| Frates Caton | Officer | 7,912 | 2026-09-29 | S |
| Barbre Tiffany Marie | Reporting Owner | 7,120.448 | 2026-10-22 | A |
| Adamo Claudine | Officer | 7,036.568 | 2026-10-22 | F |
| RAIKES JEFFREY S | Director | 6,309.936 | 2026-10-22 | A |
| DENMAN KENNETH D | Director | 5,044.936 | 2026-10-22 | A |
| George Sarah Catherine | Officer | 4,067.848 | 2026-10-22 | F |
| JEWELL SARAH MR SALLY | Director | 3,878.936 | 2026-10-22 | A |
| LIBENSON RICHARD M | Director | 3,561 | 2021-10-22 | A |
| Self Adam Webb | Officer | 3,529.35 | 2026-08-31 | — |
| Wilcox William Richard | Officer | 3,094.391 | 2026-10-13 | S |
| Foulkes Helena | Director | 1,352.802 | 2026-10-22 | A |
| Raimondo Gina Marie | Director | 481 | 2026-10-22 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-22 | Adamo Claudine | Tax withholding | 108.607 | $1018.21 | 6,441.647 |
| 2026-10-22 | Adamo Claudine | Tax withholding | 110.967 | $1018.21 | 6,550.254 |
| 2026-10-22 | Adamo Claudine | Tax withholding | 177.058 | $1018.21 | 6,661.221 |
| 2026-10-22 | Adamo Claudine | Tax withholding | 198.289 | $1018.21 | 6,838.279 |
| 2026-10-22 | Adamo Claudine | Tax withholding | 96.942 | $1018.21 | 7,036.568 |
| 2026-10-22 | Barbre Tiffany Marie | Tax withholding | 166.451 | $1018.21 | 6,583.68 |
| 2026-10-22 | Barbre Tiffany Marie | Tax withholding | 84.603 | $1018.21 | 6,750.131 |
| 2026-10-22 | Barbre Tiffany Marie | Tax withholding | 101.536 | $1018.21 | 6,834.734 |
| 2026-10-22 | Barbre Tiffany Marie | Tax withholding | 93.948 | $1018.21 | 6,936.27 |
| 2026-10-22 | Barbre Tiffany Marie | Tax withholding | 90.23 | $1018.21 | 7,030.218 |
| 2026-10-22 | Barbre Tiffany Marie | Grant / award | 1,965 | $0.00 | 7,120.448 |
| 2026-10-22 | DECKER SUSAN L | Grant / award | 266 | $0.00 | 8,797.936 |
| 2026-10-22 | DENMAN KENNETH D | Grant / award | 266 | $0.00 | 5,044.936 |
| 2026-10-22 | Foulkes Helena | Grant / award | 266 | $0.00 | 1,352.802 |
| 2026-10-22 | George Sarah Catherine | Tax withholding | 46.711 | $1018.21 | 3,868.075 |
| 2026-10-22 | George Sarah Catherine | Tax withholding | 34.821 | $1018.21 | 3,914.786 |
| 2026-10-22 | George Sarah Catherine | Tax withholding | 55.774 | $1018.21 | 3,949.607 |
| 2026-10-22 | George Sarah Catherine | Tax withholding | 62.467 | $1018.21 | 4,005.381 |
| 2026-10-22 | George Sarah Catherine | Tax withholding | 59.988 | $1018.21 | 4,067.848 |
| 2026-10-22 | JAMES HAMILTON E | Grant / award | 266 | $0.00 | 55,803.936 |
| 2026-10-22 | JEWELL SARAH MR SALLY | Grant / award | 266 | $0.00 | 3,878.936 |
| 2026-10-22 | Klauer James C | Tax withholding | 541.85 | $1018.21 | 45,928.514 |
| 2026-10-22 | Klauer James C | Tax withholding | 442.688 | $1018.21 | 46,470.364 |
| 2026-10-22 | Klauer James C | Tax withholding | 529.972 | $1018.21 | 46,913.052 |
| 2026-10-22 | Klauer James C | Tax withholding | 396.177 | $1018.21 | 47,443.024 |
| 2026-10-22 | Klauer James C | Tax withholding | 190.678 | $1018.21 | 47,839.201 |
| 2026-10-22 | RAIKES JEFFREY S | Grant / award | 266 | $0.00 | 6,309.936 |
| 2026-10-22 | Raimondo Gina Marie | Grant / award | 266 | $0.00 | 481 |
| 2026-10-22 | STANTON JOHN W | Grant / award | 266 | $0.00 | 24,355.936 |
| 2026-10-22 | Wilderotter Mary Agnes | Grant / award | 266 | $0.00 | 8,526.936 |
| 2026-10-22 | Vachris Roland Michael | Tax withholding | 1,131.478 | $1018.21 | 62,575.444 |
| 2026-10-22 | Vachris Roland Michael | Tax withholding | 1,120.544 | $1018.21 | 63,706.922 |
| 2026-10-22 | Vachris Roland Michael | Tax withholding | 1,403.592 | $1018.21 | 64,827.466 |
| 2026-10-22 | Vachris Roland Michael | Grant / award | 13,973 | $0.00 | 66,231.058 |
| 2026-10-22 | MILLERCHIP GARY | Tax withholding | 816.968 | $1018.21 | 19,974.559 |
| 2026-10-22 | MILLERCHIP GARY | Tax withholding | 500.323 | $1018.21 | 20,791.527 |
| 2026-10-22 | MILLERCHIP GARY | Tax withholding | 313.451 | $1018.21 | 21,291.85 |
| 2026-10-22 | MILLERCHIP GARY | Grant / award | 6,140 | $0.00 | 21,605.301 |
| 2026-10-13 | Wilcox William Richard | Open-market sale | 1,100 | $958.21 | 3,094.391 |
| 2026-09-29 | Adamo Claudine | Open-market sale | 2,200 | $915.93 | 7,133.51 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.