The Kosei Securities

8617.TSecurities & Commodity Futures

Filed as The Kosei Securities Co.,Ltd. (2022-06–2026-06)

Key numbers · FY ended 2026-03

Revenue¥1.1bn+99.1% YoY Operating income¥45m—Total assets¥22.3bn+2.5% YoY EPS (basic)¥22.28+145.1% YoY

Full financial history and reports →

Stock price8617 · View chart ↗

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Latest filings

Mon, Jan 5 · JST1 filing

16:055% STAKEThe Kosei Securities · tatumiyagura CO., LTD + 2 joint holders · 43.09% → 41.32%−1.77pp

Tue, Nov 18 · JST1 filing

15:485% STAKEThe Kosei Securities · Daisuke Tatsumi + 1 joint holder · 6.47% → 8.85%+2.38pp

Tue, Nov 11 · JST1 filing

15:555% STAKEThe Kosei Securities · tatumiyagura CO., LTD + 2 joint holders · 46.35% → 43.09%−3.26pp

Mon, Nov 10 · JST1 filing

15:395% STAKEThe Kosei Securities · tatumiyagura CO., LTD + 2 joint holders · 43.86% → 46.35%+2.49pp

Tue, Aug 19 · JST1 filing

13:535% STAKEThe Kosei Securities · tatumiyagura CO., LTD + 2 joint holders · 42.82% → 43.86%+1.04pp

All filings →

Major holders (5%+) · 4

Holder	Stake	Change	Filed
tatumiyagura CO., LTD	19.99%	-0.40pp	2026-01-05
tatumijimusho CO., LTD	11.72%	-1.37pp	2026-01-05
tetugakunomichi CO., LTD	9.61%	0.00pp	2026-01-05
Daisuke Tatsumi	5.70%	—	2025-11-18

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