If you invested 1000 GBp in Costain Group PLC (COST.L) 10 years ago, it would be worth 873.95 GBp as of September 12, 2026, based on a reinvested dividends scenario. Over the same period, a 1000 GBp investment made 5 years ago would be worth 3,921.23 GBp, while 1000 GBp invested 1 year ago would be worth 1,814.58 GBp. This corresponds to total returns of -12.61%, 292.12%, 81.46%, respectively, with annualized returns of -1.34%, 31.43%, 81.46%.
Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.
Date Range:
| Date | Open | Close | Adj Close | High | Low | Volume |
|---|---|---|---|---|---|---|
| September 11, 2026 | 233.5 | 229 | 229 | 233.5 | 222.5 | 2.52M |
| September 10, 2026 | 224 | 222.5 | 222.5 | 227.33 | 222 | 3.69M |
| September 09, 2026 | 229.5 | 226.5 | 226.5 | 230 | 223.5 | 1.49M |
| September 08, 2026 | 231.23 | 225 | 225 | 235.5 | 219.5 | 4.19M |
| September 07, 2026 | 224.15 | 225 | 225 | 233 | 224.15 | 476,774 |
| September 04, 2026 | 226 | 227.5 | 227.5 | 228 | 224 | 585,541 |
| September 03, 2026 | 232 | 225 | 225 | 232 | 218 | 604,829 |
| September 02, 2026 | 234.5 | 221.5 | 221.5 | 234.5 | 217 | 576,207 |
| September 01, 2026 | 228.14 | 224 | 224 | 230.5 | 220.5 | 635,810 |
| August 28, 2026 | 231.5 | 230.5 | 230.5 | 235 | 230 | 1.18M |
| August 27, 2026 | 232 | 230.5 | 230.5 | 236 | 230.5 | 375,265 |
| August 26, 2026 | 231.17 | 232.5 | 232.5 | 238 | 226.5 | 625,393 |
| August 25, 2026 | 226.4 | 231 | 231 | 233.5 | 208.5 | 649,640 |
| August 24, 2026 | 230 | 225.5 | 225.5 | 232 | 224 | 1.11M |
| August 21, 2026 | 218 | 226.5 | 226.5 | 228.5 | 218 | 694,437 |
| August 20, 2026 | 229.35 | 221 | 221 | 229.95 | 219.5 | 442,094 |
| August 19, 2026 | 227.75 | 225.5 | 225.5 | 232.5 | 223 | 532,731 |
| August 18, 2026 | 226.6 | 227.5 | 227.5 | 236 | 221 | 956,835 |
| August 17, 2026 | 241 | 228.5 | 228.5 | 241 | 228.5 | 642,476 |
| August 14, 2026 | 236 | 234.5 | 234.5 | 240 | 228.5 | 2.73M |
| August 13, 2026 | 228.5 | 229.5 | 229.5 | 237.8 | 219.28 | 3.03M |
| August 12, 2026 | 221 | 219.5 | 219.5 | 226.5 | 210.5 | 1.44M |
| August 11, 2026 | 217 | 218.5 | 218.5 | 220.5 | 215 | 312,497 |
| August 10, 2026 | 217.61 | 216.5 | 216.5 | 220.15 | 214.5 | 281,323 |
| August 07, 2026 | 212.6 | 215.5 | 215.5 | 217.05 | 209 | 377,695 |
| August 06, 2026 | 208 | 215.5 | 215.5 | 217.5 | 208 | 364,004 |
| August 05, 2026 | 204 | 214 | 214 | 216 | 204 | 453,157 |
| August 04, 2026 | 201.5 | 211.5 | 211.5 | 215.25 | 201.5 | 520,254 |
| August 03, 2026 | 202 | 212.5 | 212.5 | 215 | 202 | 252,265 |
| July 31, 2026 | 210.5 | 211 | 211 | 216.5 | 210.5 | 719,256 |
| July 30, 2026 | 210.43 | 211.5 | 211.5 | 213 | 204 | 710,085 |
| July 29, 2026 | 209 | 208 | 208 | 213 | 206.5 | 700,715 |
| July 28, 2026 | 219 | 211.5 | 211.5 | 219 | 206.5 | 463,123 |
| July 27, 2026 | 218.1 | 214 | 214 | 220.5 | 214 | 354,553 |
| July 23, 2026 | 217.5 | 216 | 216 | 219 | 215 | 325,558 |
| July 22, 2026 | 206.5 | 218 | 218 | 220 | 206.5 | 524,778 |
| July 21, 2026 | 212 | 215 | 215 | 218.5 | 211 | 1M |
| July 20, 2026 | 205 | 210 | 210 | 217.5 | 205 | 628,570 |
| July 17, 2026 | 211 | 210 | 210 | 212.5 | 209 | 592,758 |
| July 16, 2026 | 212 | 213 | 213 | 213 | 208.5 | 688,989 |
| July 15, 2026 | 206 | 211.5 | 211.5 | 215.5 | 204 | 959,780 |
| July 14, 2026 | 218.5 | 207 | 207 | 218.5 | 204.36 | 415,073 |
| July 13, 2026 | 207.5 | 209 | 209 | 209.5 | 205 | 557,967 |
| July 10, 2026 | 209.5 | 209 | 209 | 210 | 207 | 1.04M |
| July 09, 2026 | 214 | 209.5 | 209.5 | 214 | 205.5 | 2.87M |
| July 08, 2026 | 208 | 205 | 205 | 209 | 203.5 | 2.35M |
| July 07, 2026 | 218 | 209 | 209 | 218 | 207.5 | 1.32M |
| July 06, 2026 | 207.5 | 217.5 | 217.5 | 218 | 207.5 | 1.89M |
| July 03, 2026 | 209 | 217 | 217 | 219.5 | 209 | 3.95M |
| July 02, 2026 | 213 | 210.5 | 210.5 | 216 | 210.5 | 936,284 |
| July 01, 2026 | 204.5 | 213.5 | 213.5 | 213.67 | 201.5 | 534,772 |
| June 30, 2026 | 216 | 207.5 | 207.5 | 216 | 206.36 | 338,029 |
| June 29, 2026 | 214 | 205.5 | 205.5 | 214 | 204 | 421,096 |
| June 26, 2026 | 210.41 | 210 | 210 | 212.55 | 201 | 790,424 |
| June 25, 2026 | 204.88 | 212 | 212 | 214 | 200 | 647,688 |
| June 24, 2026 | 202.5 | 207 | 207 | 209.5 | 202.5 | 272,449 |
| June 23, 2026 | 202.5 | 206 | 206 | 213 | 202 | 420,415 |
| June 22, 2026 | 206.53 | 210 | 210 | 210 | 204 | 609,419 |
| June 19, 2026 | 212.5 | 207 | 207 | 212.5 | 204.5 | 2.72M |
| June 18, 2026 | 209 | 210.5 | 210.5 | 211.5 | 206.5 | 704,607 |