{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "2413",
  "company_name": "エムスリー",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/2413/",
  "api_url": "/api/2413/timeline.json",
  "updated": "2026-09-05",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/2413/",
  "source": {
    "primary": [
      "有価証券報告書"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
    "row_field": "source"
  },
  "timeline": [
    {
      "date": "2000/9",
      "importance": 1,
      "event": "ソネット・エムスリーを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/10",
      "importance": 2,
      "event": "MR君サービス開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/7",
      "importance": 3,
      "event": "医療専門サイト「m3.com」運営開始",
      "source": "有価証券報告書",
      "link": "/tse/2413/decisions/portal-integration-2003/"
    },
    {
      "date": "2003/10",
      "importance": 1,
      "event": "子会社So-net M3 USA Corporationを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/9",
      "importance": 1,
      "event": "東京証券取引所マザーズに株式を上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/12",
      "importance": 1,
      "event": "初の一般消費者向けサービス「AskDoctors」提供開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/3",
      "importance": 1,
      "event": "東京証券取引所一部に上場市場を変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/12",
      "importance": 2,
      "event": "エムスリーキャリアを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/1",
      "importance": 3,
      "event": "商号をエムスリーに変更",
      "source": "有価証券報告書",
      "link": "/tse/2413/decisions/corporate-rename-2010/"
    },
    {
      "date": "2011/8",
      "importance": 3,
      "event": "Doctors.net.uk Limitedを子会社化",
      "source": "有価証券報告書",
      "link": "/tse/2413/decisions/doctors-net-uk-2011/"
    },
    {
      "date": "2011/11",
      "importance": 1,
      "event": "本店を現在地に移転",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/10",
      "importance": 1,
      "event": "シィ・エム・エスを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/11",
      "importance": 1,
      "event": "Kingyee Co., Limitedを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/2",
      "importance": 1,
      "event": "メディサイエンスプラニングを株式交換により子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/8",
      "importance": 1,
      "event": "エムスリードクターサポートを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/11",
      "importance": 2,
      "event": "Vidal Groupの持株会社AXIO Medical Holdings Limitedを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/2",
      "importance": 1,
      "event": "Wake Research Holdings, LLCを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/3",
      "importance": 1,
      "event": "DailyRounds, Inc.を子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/11",
      "importance": 1,
      "event": "クラウド診療支援サービス「エムスリーデジカルスマート診療」提供開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場へ移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/7",
      "importance": 1,
      "event": "「ホワイト・ジャック・プロジェクト」を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/6",
      "importance": 1,
      "event": "連結子会社シーユーシーが東京証券取引所グロース市場へ新規上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/7",
      "importance": 1,
      "event": "Kantar Groupより欧米ヘルスケア調査関連2事業を譲受",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/10",
      "importance": 2,
      "event": "エランを公開買付けにより子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/4",
      "importance": 1,
      "event": "イーウェルを子会社化",
      "source": "有価証券報告書"
    }
  ]
}
