{ "commentary": "## 積水化学工業＋取引先銀行・資材メーカーの構成（1970年3月）\n\n1960年に積水化学工業ハウス事業部から分離独立し、1968年に大証一部・1970年に東証一部上場を達成した直後の構成（1970年3月時点、株主総数1,958名）は、親会社の積水化学工業5,631千株が圧倒的筆頭、続いて三和銀行・チッソ・旭化成工業・大和銀行・第一生命の各900千株、丸紅飯田・浅野スレート・不二サッシ販売・三菱電機・住金鋼材工業の各600千株が上位に並ぶ（会社年鑑1971年版）。仕入れ先となる住宅資材メーカー（旭化成・住金鋼材・浅野スレート・不二サッシ）と関西を中心とするメインバンク群（三和・大和・第一生命）が並列で並び、親会社主導で発足した独立系住宅メーカーの黎明期らしい資本関係が一覧できる。\n\n直近のFY24（2025年1月期）では日本マスタートラスト信託銀行（16.79%）と日本カストディ銀行（7.64%）の信託2行が上位を占め、3位に積水ハウス育資会（3.30%、従業員持株会）、4位に親会社だった積水化学工業（2.19%）が後退して並ぶ。所有者別では金融機関37.21%・外国法人32.34%・個人19.12%となり、株主総数も208,318名へ膨張した。1970年に5,631千株（発足時筆頭）を握っていた積水化学工業は、現在では14,168千株を保有しつつ持株比率はわずか2.19%まで希薄化し、米Woodside Homes・MDC Holdings買収による国際事業比率の拡大とともに、独立系住宅メーカーから機関投資家中心の独自資本構造へ変貌した。", "shareholders": [ { "FY": "FY15", "period": "2016/1", "rank": 1, "name": "積水化学工業株式会社", "shareholding_ratio": 7.35, "shares_held": 52168000 }, { "FY": "FY15", "period": "2016/1", "rank": 2, "name": "日本マスタートラスト信託銀行株式会社（信託口）", "shareholding_ratio": 6.41, "shares_held": 45507000 }, { "FY": "FY15", "period": "2016/1", "rank": 3, "name": "日本トラスティ・サービス信託銀行株式会社（信託口）", "shareholding_ratio": 5.74, "shares_held": 40765000 }, { "FY": "FY15", "period": "2016/1", "rank": 4, "name": "株式会社三菱東京ＵＦＪ銀行", "shareholding_ratio": 1.92, "shares_held": 13624000 }, { "FY": "FY15", "period": "2016/1", "rank": 5, "name": "第一生命保険株式会社", "shareholding_ratio": 1.71, "shares_held": 12158000 }, { "FY": "FY15", "period": "2016/1", "rank": 6, "name": "THE BANK OF NEW YORK MELLON SA/NV 10 （常任代理人 株式会社三菱東京ＵＦＪ銀行）", "shareholding_ratio": 1.7, "shares_held": 12092000 }, { "FY": "FY15", "period": "2016/1", "rank": 7, "name": "積水ハウス育資会", "shareholding_ratio": 1.68, "shares_held": 11938000 }, { "FY": "FY15", "period": "2016/1", "rank": 8, "name": "日本トラスティ・サービス信託銀行株式会社（信託口９）", "shareholding_ratio": 1.51, "shares_held": 10733000 }, { "FY": "FY15", "period": "2016/1", "rank": 9, "name": "STATE STREET BANK AND TRUST COMPANY 505225 （常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.43, "shares_held": 10131000 }, { "FY": "FY15", "period": "2016/1", "rank": 10, "name": "STATE STREET BANK WEST CLIENT - TREATY 505234 （常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.25, "shares_held": 8842000 }, { "FY": "FY16", "period": "2017/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社（信託口）", "shareholding_ratio": 7.21, "shares_held": 51189000 }, { "FY": "FY16", "period": "2017/1", "rank": 2, "name": "積水化学工業株式会社", "shareholding_ratio": 5.94, "shares_held": 42168000 }, { "FY": "FY16", "period": "2017/1", "rank": 3, "name": "日本トラスティ・サービス信託銀行株式会社（信託口）", "shareholding_ratio": 5.44, "shares_held": 38594000 }, { "FY": "FY16", "period": "2017/1", "rank": 4, "name": "株式会社三菱東京ＵＦＪ銀行", "shareholding_ratio": 1.92, "shares_held": 13624000 }, { "FY": "FY16", "period": "2017/1", "rank": 5, "name": "積水ハウス育資会", "shareholding_ratio": 1.85, "shares_held": 13159000 }, { "FY": "FY16", "period": "2017/1", "rank": 6, "name": "第一生命保険株式会社", "shareholding_ratio": 1.71, "shares_held": 12158000 }, { "FY": "FY16", "period": "2017/1", "rank": 7, "name": "日本トラスティ・サービス信託銀行株式会社（信託口７）", "shareholding_ratio": 1.28, "shares_held": 9117000 }, { "FY": "FY16", "period": "2017/1", "rank": 8, "name": "THE BANK OF NEW YORK MELLON SA/NV 10 （常任代理人 株式会社三菱東京ＵＦＪ銀行）", "shareholding_ratio": 1.27, "shares_held": 9041000 }, { "FY": "FY16", "period": "2017/1", "rank": 9, "name": "STATE STREET BANK WEST CLIENT - TREATY 505234 （常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.24, "shares_held": 8833000 }, { "FY": "FY16", "period": "2017/1", "rank": 10, "name": "STATE STREET BANK AND TRUST COMPANY 505225 （常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.23, "shares_held": 8735000 }, { "FY": "FY17", "period": "2018/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社（信託口）", "shareholding_ratio": 7.9, "shares_held": 54547000 }, { "FY": "FY17", "period": "2018/1", "rank": 2, "name": "積水化学工業株式会社", "shareholding_ratio": 6.11, "shares_held": 42168000 }, { "FY": "FY17", "period": "2018/1", "rank": 3, "name": "日本トラスティ・サービス信託銀行株式会社（信託口）", "shareholding_ratio": 5.58, "shares_held": 38531000 }, { "FY": "FY17", "period": "2018/1", "rank": 4, "name": "積水ハウス育資会", "shareholding_ratio": 2.08, "shares_held": 14366000 }, { "FY": "FY17", "period": "2018/1", "rank": 5, "name": "日本トラスティ・サービス信託銀行株式会社（信託口５）", "shareholding_ratio": 2.01, "shares_held": 13901000 }, { "FY": "FY17", "period": "2018/1", "rank": 6, "name": "株式会社三菱東京ＵＦＪ銀行", "shareholding_ratio": 1.97, "shares_held": 13624000 }, { "FY": "FY17", "period": "2018/1", "rank": 7, "name": "第一生命保険株式会社", "shareholding_ratio": 1.76, "shares_held": 12158000 }, { "FY": "FY17", "period": "2018/1", "rank": 8, "name": "ＪＰモルガン証券株式会社", "shareholding_ratio": 1.66, "shares_held": 11484000 }, { "FY": "FY17", "period": "2018/1", "rank": 9, "name": "日本トラスティ・サービス信託銀行株式会社（信託口７）", "shareholding_ratio": 1.56, "shares_held": 10745000 }, { "FY": "FY17", "period": "2018/1", "rank": 10, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 1.53, "shares_held": 10569000 }, { "FY": "FY18", "period": "2019/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社 （信託口）", "shareholding_ratio": 9.16, "shares_held": 63026000 }, { "FY": "FY18", "period": "2019/1", "rank": 2, "name": "積水化学工業株式会社", "shareholding_ratio": 6.13, "shares_held": 42168000 }, { "FY": "FY18", "period": "2019/1", "rank": 3, "name": "日本トラスティ・サービス信託銀行株式会社（信託口）", "shareholding_ratio": 5.32, "shares_held": 36648000 }, { "FY": "FY18", "period": "2019/1", "rank": 4, "name": "積水ハウス育資会", "shareholding_ratio": 2.35, "shares_held": 16194000 }, { "FY": "FY18", "period": "2019/1", "rank": 5, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 2.34, "shares_held": 16079000 }, { "FY": "FY18", "period": "2019/1", "rank": 6, "name": "株式会社三菱ＵＦＪ銀行", "shareholding_ratio": 1.98, "shares_held": 13624000 }, { "FY": "FY18", "period": "2019/1", "rank": 7, "name": "日本トラスティ・サービス信託銀行株式会社（信託口５）", "shareholding_ratio": 1.96, "shares_held": 13482000 }, { "FY": "FY18", "period": "2019/1", "rank": 8, "name": "第一生命保険株式会社", "shareholding_ratio": 1.77, "shares_held": 12158000 }, { "FY": "FY18", "period": "2019/1", "rank": 9, "name": "NORTHERN TRUST CO.（AVFC）SUB A/C NON TREATY （常任代理人 香港上海銀行東京支店）", "shareholding_ratio": 1.6, "shares_held": 11009000 }, { "FY": "FY18", "period": "2019/1", "rank": 10, "name": "日本トラスティ・サービス信託銀行株式会社（信託口７）", "shareholding_ratio": 1.53, "shares_held": 10526000 }, { "FY": "FY19", "period": "2020/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社 （信託口）", "shareholding_ratio": 9.3, "shares_held": 63568000 }, { "FY": "FY19", "period": "2020/1", "rank": 2, "name": "日本トラスティ・サービス信託銀行株式会社（信託口）", "shareholding_ratio": 5.47, "shares_held": 37394000 }, { "FY": "FY19", "period": "2020/1", "rank": 3, "name": "積水化学工業株式会社", "shareholding_ratio": 5.44, "shares_held": 37168000 }, { "FY": "FY19", "period": "2020/1", "rank": 4, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 2.46, "shares_held": 16806000 }, { "FY": "FY19", "period": "2020/1", "rank": 5, "name": "積水ハウス育資会", "shareholding_ratio": 2.39, "shares_held": 16347000 }, { "FY": "FY19", "period": "2020/1", "rank": 6, "name": "日本トラスティ・サービス信託銀行株式会社（信託口５）", "shareholding_ratio": 2.04, "shares_held": 13913000 }, { "FY": "FY19", "period": "2020/1", "rank": 7, "name": "株式会社三菱ＵＦＪ銀行", "shareholding_ratio": 1.99, "shares_held": 13624000 }, { "FY": "FY19", "period": "2020/1", "rank": 8, "name": "日本トラスティ・サービス信託銀行株式会社（信託口７）", "shareholding_ratio": 1.89, "shares_held": 12929000 }, { "FY": "FY19", "period": "2020/1", "rank": 9, "name": "NORTHERN TRUST CO.（AVFC）SUB A/C NON TREATY （常任代理人 香港上海銀行東京支店）", "shareholding_ratio": 1.8, "shares_held": 12310000 }, { "FY": "FY19", "period": "2020/1", "rank": 10, "name": "第一生命保険株式会社", "shareholding_ratio": 1.78, "shares_held": 12158000 }, { "FY": "FY20", "period": "2021/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社(信託口)", "shareholding_ratio": 9.79, "shares_held": 66713000 }, { "FY": "FY20", "period": "2021/1", "rank": 2, "name": "株式会社日本カストディ銀行（信託口）", "shareholding_ratio": 5.77, "shares_held": 39302000 }, { "FY": "FY20", "period": "2021/1", "rank": 3, "name": "積水化学工業株式会社", "shareholding_ratio": 5.46, "shares_held": 37168000 }, { "FY": "FY20", "period": "2021/1", "rank": 4, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 3.38, "shares_held": 23050000 }, { "FY": "FY20", "period": "2021/1", "rank": 5, "name": "積水ハウス育資会", "shareholding_ratio": 2.63, "shares_held": 17939000 }, { "FY": "FY20", "period": "2021/1", "rank": 6, "name": "株式会社日本カストディ銀行（信託口７）", "shareholding_ratio": 2.18, "shares_held": 14833000 }, { "FY": "FY20", "period": "2021/1", "rank": 7, "name": "第一生命保険株式会社", "shareholding_ratio": 1.79, "shares_held": 12158000 }, { "FY": "FY20", "period": "2021/1", "rank": 8, "name": "STATE STREET BANK WEST CLIENT-TREATY 505234（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.6, "shares_held": 10911000 }, { "FY": "FY20", "period": "2021/1", "rank": 9, "name": "株式会社三菱ＵＦＪ銀行", "shareholding_ratio": 1.6, "shares_held": 10899000 }, { "FY": "FY20", "period": "2021/1", "rank": 10, "name": "株式会社日本カストディ銀行（信託口５）", "shareholding_ratio": 1.58, "shares_held": 10794000 }, { "FY": "FY21", "period": "2022/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社(信託口)", "shareholding_ratio": 18.08, "shares_held": 121998000 }, { "FY": "FY21", "period": "2022/1", "rank": 2, "name": "株式会社日本カストディ銀行（信託口）", "shareholding_ratio": 5.73, "shares_held": 38703000 }, { "FY": "FY21", "period": "2022/1", "rank": 3, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 3.33, "shares_held": 22506000 }, { "FY": "FY21", "period": "2022/1", "rank": 4, "name": "積水化学工業株式会社", "shareholding_ratio": 3.28, "shares_held": 22168000 }, { "FY": "FY21", "period": "2022/1", "rank": 5, "name": "積水ハウス育資会", "shareholding_ratio": 2.81, "shares_held": 18961000 }, { "FY": "FY21", "period": "2022/1", "rank": 6, "name": "STATE STREET BANK WEST CLIENT-TREATY 505234（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.81, "shares_held": 12232000 }, { "FY": "FY21", "period": "2022/1", "rank": 7, "name": "株式会社三菱ＵＦＪ銀行", "shareholding_ratio": 1.61, "shares_held": 10899000 }, { "FY": "FY21", "period": "2022/1", "rank": 8, "name": "第一生命保険株式会社", "shareholding_ratio": 1.6, "shares_held": 10828000 }, { "FY": "FY21", "period": "2022/1", "rank": 9, "name": "JP MORGAN CHASE BANK 385781（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.11, "shares_held": 7483000 }, { "FY": "FY21", "period": "2022/1", "rank": 10, "name": "STATE STREET BANK AND TRUST COMPANY 505103（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.08, "shares_held": 7256000 }, { "FY": "FY22", "period": "2023/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社（信託口）", "shareholding_ratio": 17, "shares_held": 112607000 }, { "FY": "FY22", "period": "2023/1", "rank": 2, "name": "株式会社日本カストディ銀行（信託口）", "shareholding_ratio": 6.16, "shares_held": 40785000 }, { "FY": "FY22", "period": "2023/1", "rank": 3, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 3.63, "shares_held": 24048000 }, { "FY": "FY22", "period": "2023/1", "rank": 4, "name": "積水化学工業株式会社", "shareholding_ratio": 3.35, "shares_held": 22168000 }, { "FY": "FY22", "period": "2023/1", "rank": 5, "name": "積水ハウス育資会", "shareholding_ratio": 3.05, "shares_held": 20183000 }, { "FY": "FY22", "period": "2023/1", "rank": 6, "name": "STATE STREET BANK WEST CLIENT-TREATY 505234（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 2.16, "shares_held": 14326000 }, { "FY": "FY22", "period": "2023/1", "rank": 7, "name": "株式会社三菱ＵＦＪ銀行", "shareholding_ratio": 1.65, "shares_held": 10899000 }, { "FY": "FY22", "period": "2023/1", "rank": 8, "name": "日本証券金融株式会社", "shareholding_ratio": 1.2, "shares_held": 7961000 }, { "FY": "FY22", "period": "2023/1", "rank": 9, "name": "第一生命保険株式会社", "shareholding_ratio": 1.19, "shares_held": 7903000 }, { "FY": "FY22", "period": "2023/1", "rank": 10, "name": "STATE STREET BANK AND TRUST COMPANY 505103（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.19, "shares_held": 7851000 }, { "FY": "FY23", "period": "2024/1", "rank": 1, "name": "日本マスタートラスト信託銀行株式会社（信託口）", "shareholding_ratio": 16.98, "shares_held": 110025000 }, { "FY": "FY23", "period": "2024/1", "rank": 2, "name": "株式会社日本カストディ銀行（信託口）", "shareholding_ratio": 6.22, "shares_held": 40341000 }, { "FY": "FY23", "period": "2024/1", "rank": 3, "name": "積水ハウス育資会", "shareholding_ratio": 3.22, "shares_held": 20855000 }, { "FY": "FY23", "period": "2024/1", "rank": 4, "name": "ＳＭＢＣ日興証券株式会社", "shareholding_ratio": 3.16, "shares_held": 20485000 }, { "FY": "FY23", "period": "2024/1", "rank": 5, "name": "積水化学工業株式会社", "shareholding_ratio": 2.19, "shares_held": 14168000 }, { "FY": "FY23", "period": "2024/1", "rank": 6, "name": "STATE STREET BANK WEST CLIENT-TREATY 505234（常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 2.18, "shares_held": 14116000 }, { "FY": "FY23", "period": "2024/1", "rank": 7, "name": "THE BANK OF NEW YORK MELLON AS DEPOSITARY BANK FOR DEPOSITARY RECEIPT HOLDERS （常任代理人 株式会社みずほ銀行決済営業部）", "shareholding_ratio": 1.31, "shares_held": 8508000 }, { "FY": "FY23", "period": "2024/1", "rank": 8, "name": "日本証券金融株式会社", "shareholding_ratio": 1.27, "shares_held": 8206000 }, { "FY": "FY23", "period": "2024/1", "rank": 9, "name": 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