| 2026 |
| 03/31 | 410 | 415 | 407 | 413 | +2.74% | 1,058,100 | 1758億8844万 | -1.67% |
| 03/30 | 399 | 404 | 396 | 402 | -4.06% | 1,191,600 | 1712億376万 | -4.51% |
| 03/27 | 415 | 421 | 415 | 419 | +0.48% | 1,100,200 | 1784億4372万 | -0.95% |
| 03/26 | (IR情報)16:00 有償ストック・オプション(新株予約権)の発行に関するお知らせ |
| 03/26 | (IR情報)16:00 役員の異動に関するお知らせ |
| 03/26 | 417 | 419 | 412 | 417 | -1.18% | 1,040,700 | 1775億9196万 | -1.42% |
| 03/25 | 417 | 424 | 416 | 422 | +0.48% | 977,400 | 1797億2136万 | -0.24% |
| 03/24 | 417 | 420 | 415 | 420 | +2.69% | 673,600 | 1788億6960万 | -0.94% |
| 03/23 | (IR情報)16:00 「Japan DX Week 【春】 2026 社内業務DX EXPO」出展のお知らせ |
| 03/23 | 411 | 413 | 407 | 409 | -2.15% | 1,128,600 | 1741億8492万 | -3.54% |
| 03/19 | 420 | 422 | 416 | 418 | -0.95% | 1,073,500 | 1780億1784万 | -1.88% |
| 03/18 | 421 | 424 | 420 | 422 | +0.72% | 648,200 | 1797億2136万 | -1.17% |
| 03/17 | 423 | 426 | 419 | 419 | -1.18% | 598,200 | 1784億4372万 | -2.1% |
| 03/16 | 419 | 426 | 418 | 424 | +1.19% | 901,200 | 1805億7312万 | -0.93% |
| 03/13 | 418 | 421 | 416 | 419 | -0.48% | 871,200 | 1784億4372万 | -2.56% |
| 03/12 | 420 | 423 | 418 | 421 | -1.17% | 881,900 | 1792億9548万 | -2.55% |
| 03/11 | 428 | 432 | 425 | 426 | -0.7% | 654,300 | 1814億2488万 | -2.07% |
| 03/10 | 429 | 432 | 424 | 429 | +0.94% | 1,009,500 | 1827億252万 | -2.05% |
| 03/09 | (IR情報)16:00 「健康経営優良法人2026(大規模法人部門)」に認定されました |
| 03/09 | 412 | 427 | 412 | 425 | -0.7% | 1,233,700 | 1809億9900万 | -3.63% |
| 03/06 | 419 | 429 | 418 | 428 | +2.39% | 1,858,900 | 1822億7664万 | -3.82% |
| 03/05 | 420 | 421 | 416 | 418 | +1.95% | 1,129,600 | 1780億1784万 | -6.7% |
| 03/04 | 410 | 415 | 406 | 410 | -0.97% | 1,639,100 | 1746億1080万 | -9.29% |
| 03/03 | 423 | 423 | 413 | 414 | -2.59% | 1,523,300 | 1763億1432万 | -9.21% |
| 03/02 | 428 | 435 | 423 | 425 | -3.85% | 1,362,500 | 1809億9900万 | -7.61% |
| 02/27 | (IR情報)16:00 非上場の親会社等の決算に関するお知らせ |
| 02/27 | 441 | 442 | 436 | 442 | +1.61% | 1,269,000 | 1882億3896万 | -4.54% |
| 02/26 | 429 | 440 | 424 | 435 | +3.08% | 2,081,100 | 1852億5780万 | -6.65% |
| 02/25 | 418 | 425 | 416 | 422 | +2.93% | 1,224,600 | 1797億2136万 | -10.21% |
| 02/24 | 420 | 421 | 408 | 410 | -5.09% | 1,726,500 | 1746億1080万 | -13.32% |
| 02/20 | 433 | 435 | 428 | 432 | -1.14% | 903,300 | 1839億8016万 | -9.62% |
| 02/19 | 438 | 440 | 433 | 437 | +1.39% | 987,500 | 1861億956万 | -9.15% |
| 02/18 | 430 | 433 | 426 | 431 | +0.47% | 961,700 | 1835億5428万 | -11.13% |
| 02/17 | 437 | 438 | 427 | 429 | -2.05% | 1,219,900 | 1827億252万 | -12.09% |
| 02/16 | 425 | 438 | 422 | 438 | +3.06% | 2,114,900 | 1865億3544万 | -10.98% |
| 02/13 | 440 | 441 | 425 | 425 | -3.63% | 1,739,000 | 1809億9900万 | -14.14% |
| 02/12 | 447 | 450 | 441 | 441 | -3.08% | 2,010,000 | 1878億1308万 | -11.62% |
| 02/10 | 440 | 458 | 439 | 455 | +4.6% | 1,937,200 | 1937億7540万 | -9.36% |
| 02/09 | 447 | 450 | 430 | 435 | 0% | 2,688,300 | 1852億5780万 | -13.69% |
| 02/06 | 454 | 454 | 430 | 435 | -9% | 5,369,400 | 1852億5780万 | -14.2% |
| 02/05 | (IR情報)16:00 2026年3月期第3四半期決算短信〔日本基準〕(連結) |
| 02/05 | 466 | 483 | 462 | 478 | +2.8% | 3,219,000 | 2035億7064万 | -6.46% |
| 02/04 | 494 | 497 | 465 | 465 | -6.25% | 2,229,900 | 1980億3420万 | -9.36% |
| 02/03 | 495 | 500 | 494 | 496 | +0.2% | 621,300 | 2112億3648万 | -3.69% |
| 02/02 | 511 | 511 | 495 | 495 | -2.56% | 987,500 | 2108億1060万 | -4.07% |
| 01/30 | 511 | 511 | 503 | 508 | -0.59% | 718,500 | 2163億4704万 | -1.74% |
| 01/29 | 513 | 519 | 501 | 511 | -1.73% | 1,490,600 | 2176億2468万 | -1.16% |
| 01/28 | 510 | 527 | 509 | 520 | +2.97% | 2,296,100 | 2214億5760万 | +0.39% |
| 01/27 | 508 | 510 | 501 | 505 | -0.79% | 885,000 | 2150億6940万 | -2.51% |
| 01/26 | 517 | 518 | 508 | 509 | -1.74% | 882,200 | 2167億7292万 | -1.74% |
| 01/23 | 514 | 523 | 513 | 518 | +0.78% | 654,000 | 2206億584万 | -0.19% |
| 01/22 | 517 | 517 | 511 | 514 | +0.78% | 657,200 | 2189億232万 | -0.96% |
| 01/21 | 514 | 518 | 510 | 510 | -1.73% | 955,400 | 2171億9880万 | -1.92% |
| 01/20 | 516 | 528 | 512 | 519 | +0.19% | 1,184,500 | 2210億3172万 | -0.19% |
| 01/19 | (IR情報)16:00 株式会社システナ、SDV開発の現場を変える:AI×自動化×手の内化 |
| 01/19 | 522 | 527 | 518 | 518 | -0.58% | 629,300 | 2206億584万 | -0.38% |
| 01/16 | 515 | 522 | 510 | 521 | +0.58% | 827,900 | 2218億8348万 | +0.19% |
| 01/15 | 524 | 525 | 514 | 518 | -0.58% | 1,123,500 | 2206億584万 | -0.38% |
| 01/14 | 522 | 526 | 518 | 521 | 0% | 700,600 | 2218億8348万 | +0.39% |
| 01/13 | 521 | 522 | 516 | 521 | +0.97% | 615,100 | 2218億8348万 | +0.39% |
| 01/09 | 523 | 527 | 514 | 516 | -0.58% | 538,000 | 2197億5408万 | -0.58% |
| 01/08 | 514 | 520 | 513 | 519 | +0.78% | 730,000 | 2210億3172万 | 0% |
| 01/07 | 517 | 521 | 513 | 515 | -1.34% | 624,500 | 2193億2820万 | -0.77% |
| 01/06 | 519 | 525 | 517 | 522 | +1.36% | 689,300 | 2223億936万 | +0.58% |
| 01/05 | 519 | 522 | 512 | 515 | +0.19% | 889,000 | 2193億2820万 | -0.77% |
| 2025 |
| 12/30 | 520 | 520 | 514 | 514 | -0.77% | 337,500 | 2189億232万 | -0.96% |
| 12/29 | 525 | 525 | 514 | 518 | -1.33% | 674,500 | 2206億584万 | 0% |
| 12/26 | 521 | 527 | 521 | 525 | +0.77% | 438,200 | 2235億8700万 | +1.16% |
| 12/25 | 520 | 521 | 516 | 521 | +0.39% | 220,500 | 2218億8348万 | +0.77% |
| 12/24 | 521 | 524 | 517 | 519 | -0.38% | 318,100 | 2210億3172万 | +0.58% |
| 12/23 | (IR情報)16:30 「AIデータセンター推進室」新設のお知らせ |
| 12/23 | (IR情報)16:00 システナ「PMOアワード 2025」にて「優秀賞」を受賞 |
| 12/23 | 520 | 521 | 516 | 521 | +0.77% | 404,200 | 2218億8348万 | +1.17% |
| 12/22 | 532 | 533 | 517 | 517 | -1.52% | 883,100 | 2201億7996万 | +0.39% |
| 12/19 | 522 | 528 | 520 | 525 | +0.57% | 578,700 | 2235億8700万 | +1.94% |
| 12/18 | 520 | 526 | 520 | 522 | +0.38% | 556,200 | 2223億936万 | +1.56% |
| 12/17 | 522 | 524 | 515 | 520 | 0% | 625,600 | 2214億5760万 | +1.17% |
| 12/16 | 520 | 525 | 520 | 520 | -1.14% | 514,900 | 2214億5760万 | +1.17% |
| 12/15 | 532 | 534 | 520 | 526 | -2.23% | 1,020,100 | 2240億1288万 | +2.33% |
| 12/12 | 531 | 547 | 526 | 538 | +5.28% | 2,798,900 | 2291億2344万 | +4.87% |
| 12/11 | (IR情報)16:00 AIデータセンター構想の共同検討開始について |
| 12/11 | 520 | 522 | 509 | 511 | -1.54% | 660,600 | 2176億2468万 | -0.2% |
| 12/10 | 520 | 523 | 512 | 519 | 0% | 709,600 | 2210億3172万 | +1.17% |
| 12/09 | (IR情報)16:00 第9回 資産運用EXPO【春】出展のお知らせ |
| 12/09 | 515 | 519 | 509 | 519 | +0.58% | 708,700 | 2210億3172万 | +1.17% |
| 12/08 | 513 | 522 | 510 | 516 | +2.58% | 724,500 | 2197億5408万 | +0.39% |
| 12/05 | 510 | 515 | 503 | 503 | -2.33% | 805,500 | 2142億1764万 | -1.95% |
| 12/04 | 512 | 518 | 512 | 515 | +1.18% | 613,900 | 2193億2820万 | +0.39% |
| 12/03 | 519 | 520 | 509 | 509 | -1.55% | 616,800 | 2167億7292万 | -0.78% |
| 12/02 | 519 | 521 | 513 | 517 | -0.19% | 447,700 | 2201億7996万 | +0.58% |
| 12/01 | 525 | 529 | 516 | 518 | -1.15% | 755,300 | 2206億584万 | +0.97% |
| 11/28 | 519 | 530 | 518 | 524 | +0.77% | 1,300,100 | 2231億6112万 | +2.14% |
| 11/27 | 513 | 521 | 513 | 520 | +1.56% | 614,500 | 2214億5760万 | +1.56% |
| 11/26 | 513 | 513 | 509 | 512 | +0.99% | 449,900 | 2180億5056万 | +0.2% |
| 11/25 | 523 | 526 | 507 | 507 | -3.06% | 776,800 | 2159億2116万 | -0.59% |
| 11/21 | 495 | 523 | 495 | 523 | +5.87% | 1,169,600 | 2227億3524万 | +2.75% |
| 11/20 | 502 | 504 | 494 | 494 | 0% | 790,800 | 2103億8472万 | -2.56% |
| 11/19 | 491 | 498 | 488 | 494 | -0.2% | 827,700 | 2103億8472万 | -2.56% |
| 11/18 | 502 | 504 | 492 | 495 | -1.98% | 803,300 | 2108億1060万 | -2.37% |
| 11/17 | 510 | 512 | 503 | 505 | -1.37% | 657,300 | 2150億6940万 | -0.39% |
| 11/14 | 514 | 518 | 510 | 512 | -0.39% | 651,000 | 2180億5056万 | +0.99% |
| 11/13 | 523 | 528 | 514 | 514 | -1.34% | 801,500 | 2189億232万 | +1.38% |
| 11/12 | 515 | 524 | 514 | 521 | +1.36% | 796,700 | 2218億8348万 | +2.76% |
| 11/11 | 515 | 516 | 509 | 514 | -0.96% | 615,900 | 2189億232万 | +1.38% |
| 11/10 | 516 | 519 | 511 | 519 | +0.58% | 978,000 | 2210億3172万 | +2.57% |
| 11/07 | (5%ルール)逸見由美子(0.41%)ガヤ・アセットマネージャー(0.5%)セバス・アセットマネジメント(0.26%)ファンタジー・ローズ(0.26%)SMS HD(24.48%) |
| 11/07 | 510 | 520 | 508 | 516 | +1.18% | 890,600 | 2197億5408万 | +2.18% |
| 11/06 | 511 | 511 | 501 | 510 | -1.35% | 1,120,100 | 2171億9880万 | +0.99% |
| 11/05 | 525 | 528 | 504 | 517 | -3% | 1,322,800 | 2201億7996万 | +2.17% |
| 11/04 | 528 | 536 | 520 | 533 | +0.38% | 1,496,800 | 2269億9404万 | +5.34% |
| 10/31 | (IR情報)16:00 【第45回アビリンピック・金賞受賞】当社グループ 東京都ビジネスサービス(株)社員、稲葉洋介が快挙 |
| 10/31 | 549 | 555 | 517 | 531 | +4.32% | 4,475,600 | 2261億4228万 | +4.94% |
| 10/30 | (IR情報)16:00 業績予想の修正、剰余金の配当(中間配当)の決定および期末配当予想の修正に関するお知らせ |
| 10/30 | (IR情報)16:00 2026年3月期第2四半期(中間期)決算短信〔日本基準〕(連結) |
| 10/30 | 510 | 515 | 506 | 509 | +1.19% | 1,556,900 | 2167億7292万 | +0.79% |
| 10/29 | (IR情報)16:00 システナとスーパーマイクロ株式会社、日本AMD株式会社が「第8回 [名古屋]オートモーティブ ワールド -クルマの先端技術展-」に共同出展 |