Seiyu Kogyo

9170.TServices
Major holders (5%+) · 6
HolderStakeChangeFiled
HOSONUMA Co., Ltd.45.40%-4.59pp2026-08-28
MASAHITO HOSONUMA23.61%-2.38pp2026-08-28
NAOKO HOSONUMA8.47%-1.87pp2026-08-28
Odake Company Co., Ltd7.11%—2024-08-09
Yamazaki Gravel Inc.5.13%+0.02pp2024-05-14
Yamazaki Gravel Inc.5.13%+0.02pp2024-05-14

Each holder's own ratio from its most recent large-shareholding report.

Former and minor holders (below 5%) · 5
RIE HOSONUMA1.18%2026-08-28
Yamazen Inc.0.58%2024-03-18
Yamazaki Holdings Inc.0.53%2024-03-18
Horizon Inc.0.09%2024-03-18
Kyota Uemura0.02%2024-03-22
Ownership history · 30
FiledHolderRatioChangePurpose
2024-03-13AmendedKyota Uemura2024-03-13 · amended0.02%no change—
2024-03-13AmendedHorizon Inc.2024-03-13 · amended0.09%no change—
2024-03-13AmendedYamazaki Holdings Inc.2024-03-13 · amended0.53%no change—
2024-03-13AmendedYamazen Inc.2024-03-13 · amended0.58%no change—
2024-03-13AmendedYamazaki Gravel Inc.2024-03-13 · amended3.91%no change—
2024-03-04AmendedKyota Uemura2024-03-04 · amended0.02%new—
2024-03-04AmendedHorizon Inc.2024-03-04 · amended0.09%new—
2024-03-04AmendedYamazaki Holdings Inc.2024-03-04 · amended0.53%new—
2024-03-04AmendedYamazen Inc.2024-03-04 · amended0.58%new—
2024-03-04AmendedYamazaki Gravel Inc.2024-03-04 · amended3.91%new—

Each holder in 5% reports, joint holders included. Purpose is classified from the filed text.