The highest closing price for Costco Wholesale (COST) last month was $938.57, on September 1. It was down 3.9% for the month. The latest price is $1,012.28.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
September 30 2026 | $923.25 | $924.19 | $908.96 | $909.00 | 2,219,581 |
September 29 2026 | $915.45 | $924.60 | $911.31 | $923.23 | 2,415,200 |
September 28 2026 | $923.02 | $929.72 | $911.65 | $921.56 | 2,443,760 |
September 25 2026 | $885.69 | $923.77 | $881.80 | $921.40 | 4,631,424 |
September 24 2026 | $907.47 | $908.09 | $893.94 | $895.16 | 2,893,294 |
September 23 2026 | $899.98 | $904.25 | $892.04 | $903.36 | 2,283,883 |
September 22 2026 | $900.92 | $902.07 | $894.52 | $898.08 | 1,982,884 |
September 21 2026 | $889.75 | $898.11 | $884.19 | $897.15 | 2,163,492 |
September 18 2026 | $891.11 | $897.07 | $889.24 | $893.99 | 4,180,440 |
September 17 2026 | $893.99 | $894.68 | $886.73 | $892.61 | 2,322,546 |
September 16 2026 | $899.72 | $900.67 | $891.35 | $892.42 | 2,101,651 |
September 15 2026 | $915.57 | $915.57 | $898.92 | $900.02 | 2,200,912 |
September 14 2026 | $912.30 | $920.63 | $909.45 | $917.55 | 2,014,224 |
September 11 2026 | $903.83 | $906.02 | $899.42 | $903.43 | 1,773,175 |
September 10 2026 | $905.28 | $910.75 | $897.67 | $901.05 | 1,926,795 |
September 09 2026 | $905.66 | $907.89 | $897.10 | $901.27 | 2,067,832 |
September 08 2026 | $911.05 | $913.78 | $904.76 | $908.84 | 2,240,323 |
September 04 2026 | $924.72 | $926.67 | $913.19 | $914.39 | 2,079,070 |
September 03 2026 | $926.42 | $929.39 | $913.96 | $924.04 | 2,172,780 |
September 02 2026 | $937.11 | $937.49 | $918.95 | $927.11 | 2,166,373 |
September 01 2026 | $945.95 | $950.69 | $934.54 | $938.57 | 1,508,559 |
Daily pricing data for Costco Wholesale dates back to 11/27/1985, and may be incomplete.