| 2026 |
| 10/27 | 342 | 342 | 336 | 337 | +0.6% | 1,500 | - | -5.6% |
| 10/26 | 335 | 340 | 334 | 335 | -0.59% | 2,500 | - | -6.42% |
| 10/23 | 337 | 340 | 337 | 337 | -0.88% | 1,600 | - | -6.13% |
| 10/22 | 341 | 341 | 335 | 340 | -1.16% | 3,500 | - | -5.82% |
| 10/21 | 345 | 345 | 344 | 344 | -0.29% | 1,500 | - | -4.97% |
| 10/20 | 345 | 345 | 345 | 345 | -1.15% | 700 | - | -4.7% |
| 10/19 | 350 | 352 | 346 | 349 | -0.85% | 2,900 | - | -3.86% |
| 10/16 | 355 | 356 | 352 | 352 | -0.85% | 1,200 | - | -3.3% |
| 10/15 | 357 | 357 | 353 | 355 | -1.39% | 31,400 | - | -2.74% |
| 10/14 | 363 | 364 | 359 | 360 | 0% | 3,400 | - | -1.37% |
| 10/13 | 361 | 363 | 360 | 360 | +0.28% | 900 | - | -1.37% |
| 10/09 | 359 | 359 | 353 | 359 | +0.28% | 2,400 | - | -1.91% |
| 10/08 | 356 | 360 | 356 | 358 | +0.56% | 1,800 | - | -2.19% |
| 10/07 | 362 | 362 | 353 | 356 | -0.84% | 2,400 | - | -3% |
| 10/06 | 358 | 364 | 358 | 359 | -0.28% | 2,500 | - | -2.18% |
| 10/05 | 368 | 368 | 358 | 360 | -1.1% | 3,000 | - | -1.91% |
| 10/02 | 365 | 367 | 364 | 364 | -1.09% | 1,200 | - | -0.82% |
| 10/01 | 368 | 368 | 361 | 368 | -0.54% | 8,300 | - | +0.27% |
| 09/30 | 375 | 375 | 369 | 370 | -0.27% | 5,500 | - | +1.09% |
| 09/29 | 368 | 371 | 368 | 371 | +1.64% | 400 | - | +1.37% |
| 09/28 | (IR情報)15:00 HOUSEIの生成AIチャットボット「imprai ezKotae」、Ver1.2リリース |
| 09/28 | 375 | 375 | 365 | 365 | -2.67% | 3,400 | - | -0.27% |
| 09/25 | 366 | 378 | 365 | 375 | +2.18% | 7,900 | - | +2.46% |
| 09/24 | (IR情報)16:00 HOUSEIの無人店舗ソリューション、三洋堂書店40店舗がスマート無人営業化 |
| 09/24 | 366 | 370 | 366 | 367 | 0% | 1,400 | - | +0.55% |
| 09/18 | 367 | 369 | 367 | 367 | -1.08% | 900 | - | +0.82% |
| 09/17 | 376 | 376 | 368 | 371 | +0.82% | 8,400 | - | +1.92% |
| 09/16 | 368 | 368 | 364 | 368 | +0.55% | 2,100 | - | +1.38% |
| 09/15 | 366 | 368 | 360 | 366 | 0% | 2,300 | - | +0.83% |
| 09/14 | 368 | 368 | 364 | 366 | -0.27% | 1,000 | - | +1.1% |
| 09/11 | 367 | 367 | 367 | 367 | +1.66% | 100 | - | +1.38% |
| 09/10 | 367 | 367 | 361 | 361 | -1.63% | 1,300 | - | 0% |
| 09/09 | 363 | 368 | 360 | 367 | +0.27% | 3,100 | - | +1.66% |
| 09/08 | 369 | 369 | 365 | 366 | -1.08% | 1,400 | - | +1.39% |
| 09/07 | 370 | 373 | 370 | 370 | +0.54% | 1,700 | - | +2.78% |
| 09/04 | 373 | 373 | 368 | 368 | 0% | 1,400 | - | +2.22% |
| 09/03 | 368 | 370 | 368 | 368 | -0.27% | 1,400 | - | +2.22% |
| 09/02 | 372 | 372 | 369 | 369 | 0% | 1,500 | - | +2.79% |
| 09/01 | 370 | 370 | 365 | 369 | 0% | 2,900 | - | +2.79% |
| 08/31 | (IR情報)14:00 HOUSEIの無人店舗ソリューション、三洋堂書店39店舗がスマート無人営業化 |
| 08/31 | 366 | 370 | 366 | 369 | +2.5% | 6,400 | - | +3.07% |
| 08/28 | 360 | 362 | 360 | 360 | 0% | 5,500 | - | +0.84% |
| 08/27 | 359 | 360 | 357 | 360 | +0.28% | 2,900 | - | +0.84% |
| 08/26 | 359 | 359 | 359 | 359 | -0.55% | 300 | - | +0.56% |
| 08/25 | 361 | 361 | 360 | 361 | 0% | 4,800 | - | +1.12% |
| 08/24 | 360 | 361 | 360 | 361 | +0.28% | 300 | - | +1.12% |
| 08/21 | 359 | 361 | 359 | 360 | -0.55% | 700 | - | +0.84% |
| 08/20 | 361 | 362 | 357 | 362 | 0% | 3,300 | - | +1.4% |
| 08/19 | 362 | 363 | 358 | 362 | +1.12% | 2,900 | - | +1.12% |
| 08/18 | 363 | 363 | 358 | 358 | +0.85% | 2,800 | - | 0% |
| 08/17 | 355 | 361 | 355 | 355 | +0.57% | 5,200 | - | -1.11% |
| 08/14 | 355 | 358 | 353 | 353 | -0.28% | 2,800 | - | -1.67% |
| 08/13 | (IR情報)17:00 (訂正・数値データ訂正)「2026年12月期第2四半期(中間期)決算短信〔日本基準〕(連結)」の一部訂正について |
| 08/13 | (IR情報)12:00 2026年12月期第2四半期(中間期)決算短信〔日本基準〕(連結) |
| 08/13 | (IR情報)12:00 新会社(孫会社)設立に関するお知らせ |
| 08/13 | 357 | 374 | 354 | 354 | -1.39% | 15,500 | - | -1.39% |
| 08/12 | 356 | 359 | 354 | 359 | +1.41% | 1,700 | - | -0.28% |
| 08/10 | 354 | 354 | 351 | 354 | 0% | 1,200 | - | -1.67% |
| 08/07 | 356 | 356 | 353 | 354 | 0% | 1,000 | - | -1.67% |
| 08/06 | 358 | 358 | 353 | 354 | -0.84% | 600 | - | -1.94% |
| 08/05 | 353 | 357 | 351 | 357 | +0.56% | 700 | - | -1.11% |
| 08/04 | 356 | 359 | 352 | 355 | 0% | 2,000 | - | -1.66% |
| 08/03 | 355 | 355 | 355 | 355 | -1.39% | 1,100 | - | -1.93% |
| 07/31 | 364 | 364 | 360 | 360 | 0% | 2,800 | - | -0.55% |
| 07/30 | 359 | 360 | 353 | 360 | +0.28% | 2,400 | - | -0.55% |
| 07/29 | 360 | 360 | 355 | 359 | +0.56% | 1,600 | - | -0.83% |
| 07/28 | 352 | 359 | 352 | 357 | +0.28% | 900 | - | -1.38% |
| 07/27 | 351 | 356 | 350 | 356 | +2.01% | 2,100 | - | -1.66% |
| 07/24 | 354 | 356 | 349 | 349 | -1.69% | 6,700 | - | -3.59% |
| 07/23 | 353 | 355 | 349 | 355 | -0.28% | 4,700 | - | -1.93% |
| 07/22 | (IR情報)12:00 HOUSEIの無人店舗ソリューション、三洋堂書店37店舗がスマート無人営業化 |
| 07/22 | 357 | 359 | 353 | 356 | 0% | 8,600 | - | -1.66% |
| 07/21 | 356 | 361 | 356 | 356 | -0.56% | 2,300 | - | -1.66% |
| 07/17 | 365 | 365 | 358 | 358 | -1.92% | 1,000 | - | -1.38% |
| 07/16 | 368 | 374 | 355 | 365 | -2.41% | 3,800 | - | +0.55% |
| 07/15 | 381 | 381 | 357 | 374 | +0.27% | 4,800 | - | +3.03% |
| 07/14 | 369 | 386 | 369 | 373 | +1.08% | 3,900 | - | +2.75% |
| 07/13 | 375 | 375 | 369 | 369 | +0.27% | 3,200 | - | +1.65% |
| 07/10 | 365 | 368 | 364 | 368 | +0.82% | 1,600 | - | +1.1% |
| 07/09 | 364 | 365 | 364 | 365 | +0.27% | 200 | - | +0.27% |
| 07/08 | 362 | 364 | 362 | 364 | 0% | 1,000 | - | -0.27% |
| 07/07 | 364 | 365 | 364 | 364 | 0% | 4,000 | - | -0.82% |
| 07/06 | 366 | 367 | 360 | 364 | 0% | 3,600 | - | -1.09% |
| 07/03 | 360 | 364 | 360 | 364 | +1.11% | 2,400 | - | -1.62% |
| 07/02 | 357 | 363 | 357 | 360 | -0.28% | 1,300 | - | -2.96% |
| 07/01 | 366 | 366 | 361 | 361 | -1.1% | 1,000 | - | -3.22% |
| 06/30 | 365 | 365 | 365 | 365 | -0.27% | 1,800 | - | -2.67% |
| 06/29 | (IR情報)14:00 HOUSEIの無人店舗ソリューション、三洋堂書店36店舗がスマート無人営業化 |
| 06/29 | 357 | 366 | 357 | 366 | +1.95% | 10,300 | - | -2.92% |
| 06/26 | 356 | 359 | 356 | 359 | -0.55% | 900 | - | -5.03% |
| 06/25 | 361 | 362 | 356 | 361 | -0.28% | 6,000 | - | -5% |
| 06/24 | 353 | 362 | 353 | 362 | +2.26% | 3,400 | - | -5.24% |
| 06/23 | 356 | 358 | 354 | 354 | -1.12% | 1,100 | - | -7.81% |
| 06/22 | 359 | 360 | 357 | 358 | +0.28% | 1,100 | - | -7.25% |
| 06/19 | 360 | 360 | 357 | 357 | -0.28% | 1,300 | - | -7.75% |
| 06/18 | 360 | 361 | 358 | 358 | -0.56% | 1,800 | - | -7.97% |
| 06/17 | 360 | 360 | 358 | 360 | +1.12% | 4,900 | - | -7.93% |
| 06/16 | 368 | 370 | 356 | 356 | -4.04% | 4,400 | - | -9.41% |
| 06/15 | 366 | 371 | 366 | 371 | +1.09% | 2,600 | - | -6.08% |
| 06/12 | 366 | 368 | 366 | 367 | +0.27% | 2,000 | - | -7.32% |
| 06/11 | 366 | 367 | 366 | 366 | -1.61% | 3,400 | - | -8.04% |
| 06/10 | 365 | 372 | 365 | 372 | +1.92% | 5,500 | - | -7% |
| 06/09 | 380 | 380 | 364 | 365 | -4.7% | 22,700 | - | -9.2% |
| 06/08 | 383 | 388 | 380 | 383 | -0.52% | 4,100 | - | -5.2% |
| 06/05 | 384 | 392 | 384 | 385 | -1.28% | 1,800 | - | -5.17% |
| 06/04 | 393 | 398 | 390 | 390 | -1.27% | 2,800 | - | -4.41% |
| 06/03 | 398 | 404 | 395 | 395 | -0.75% | 3,300 | - | -3.42% |
| 06/02 | 402 | 402 | 398 | 398 | -1.97% | 3,100 | - | -2.93% |
| 05/29 | (IR情報)14:00 HOUSEIの無人店舗ソリューション、三洋堂書店34店舗がスマート無人営業化 |