Who has been buying Simplex Financial Holdings Co., Ltd. stock?

4 distinct investors have filed 19 disclosed large-shareholding filings in Simplex Financial Holdings Co., Ltd. (7176), most recently on 2026-01-23. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Simplex Financial Holdings Co., Ltd. have?

Simplex Financial Holdings Co., Ltd. has 19 buy-side and 12 sell-side disclosures on record, covering ¥14.4B ($92.8M) in total reported value, spanning 2021-07-12 to 2026-01-23.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Simplex Financial Holdings Co., Ltd. 7176

Company

株式会社シンプレクス・ファイナンシャル・ホールディングスSimplex Financial Holdings Co., Ltd.

Investors

Buys

Total Value

¥14.4B ($92.8M)

Avg Return

-58.13%

Last Filing

2026-01-23

Simplex Financial Holdings Co., Ltd. (7176) has 19 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥14.4B ($92.8M) in reported transaction value. The earliest filing StockDrifts holds for Simplex Financial Holdings Co., Ltd. is dated 2021-07-12; the most recent is 2026-01-23. Across these filings the average return since disclosure is -58.13%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-08-05	BUY	Market Buy	水嶋浩雅 Hiromasa Mizushima	activist	8.2M	¥757	+0.0%	¥1.1B ($7.2M)
2026-08-05	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	8.2M	¥757	-	¥1.1B ($7.2M)
2026-08-05	BUY	Market Buy	株式会社OFFICE M 代表取締役相楽麻里衣 OFFICE M Co., Ltd.	passive	2.1M	¥757	+0.0%	¥279M ($1.8M)
2026-07-31	BUY	negotiated	株式会社SIMPLEX	strategic	1.9M	¥757	-	-
2026-07-31	SELL	negotiated	株式会社BSM	strategic	8.4M	¥757	+0.0%	¥2.5B ($16.1M)
2026-01-23	BUY	Market Buy	株式会社SIMPLEX	strategic	1.9M	¥464	+63.1%	¥327M ($2.1M)
2026-01-23	BUY	Market Buy	株式会社BSM	strategic	11.7M	¥464	+63.1%	¥2.1B ($13.3M)
2025-08-20	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	542.4K	¥7,110	-	¥2.4B ($15.3M)
2025-08-20	SELL	negotiated	株式会社SIMPLEX SIMPLEX K.K.	strategic	92.6K	¥7,110	+89.3%	¥2M ($10K)
2025-08-20	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	218.1K	¥7,110	-89.3%	¥464M ($3.0M)
2025-08-20	SELL	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	135.6K	¥7,110	+89.3%	¥586M ($3.8M)
2025-08-20	SELL	unknown	水嶋浩雅 Hiromasa Mizushima	activist	542.4K	¥7,110	+89.3%	¥2.4B ($15.3M)
2025-08-20	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	218.1K	¥7,110	-	¥464M ($3.0M)
2025-08-20	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	135.6K	¥7,110	-	¥586M ($3.8M)
2025-08-20	BUY	negotiated	株式会社BSM BSM Co., Ltd.	strategic	585.4K	¥7,110	-89.3%	¥4.1B ($26.4M)
2025-03-12	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	875.2K	¥5,130	-	-
2025-03-12	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	875.2K	¥5,130	-	-
2025-03-12	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	875.2K	¥5,130	-	-
2025-03-12	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	875.2K	¥5,130	-	-
2025-01-10	BUY	Market Buy	株式会社SIMPLEX SIMPLEX K.K.	strategic	92.7K	¥5,130	-85.2%	¥144M ($927K)
2025-01-10	BUY	Market Buy	株式会社BSM BSM Co., Ltd.	strategic	1.0M	¥5,130	-85.2%	¥1.5B ($10.0M)
2024-09-03	SELL	negotiated	株式会社SIMPLEX SIMPLEX K.K.	strategic	92.8K	¥3,885	+80.5%	¥1M ($8K)
2024-09-03	BUY	negotiated	株式会社BSM BSM Co., Ltd.	strategic	1.0M	¥3,885	-80.5%	¥3.8B ($24.7M)
2024-08-30	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	218.8K	¥3,885	-	¥366M ($2.4M)
2024-08-30	SELL	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	218.8K	¥3,885	+80.5%	¥366M ($2.4M)
2024-08-30	BUY	Market Buy	水嶋浩雅 Hiromasa Mizushima	activist	875.2K	¥3,885	-80.5%	¥424M ($2.7M)
2024-02-07	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	313.0K	¥2,330	-	¥240M ($1.5M)
2024-02-07	BUY	Market Buy	株式会社OFFICE M OFFICE M Co., Ltd.	passive	313.0K	¥2,330	-67.5%	¥240M ($1.5M)
2024-01-12	BUY	Market Buy	株式会社BSM BSM Co., Ltd.	strategic	1.5M	¥2,330	-67.5%	¥1.4B ($8.8M)
2024-01-12	BUY	Market Buy	株式会社SIMPLEX SIMPLEX K.K.	strategic	92.9K	¥2,330	-67.5%	¥86M ($555K)
2023-08-09	SELL	negotiated	株式会社SIMPLEX SIMPLEX K.K.	strategic	93.0K	¥1,703	+55.5%	¥2M ($11K)
2023-08-09	BUY	negotiated	株式会社BSM BSM Co., Ltd.	strategic	1.5M	¥1,703	-55.5%	¥2.5B ($15.9M)
2023-07-07	BUY	Market Buy	株式会社BSM BSM Co., Ltd.	strategic	250.6K	¥1,703	-55.5%	¥166M ($1.1M)
2023-07-07	BUY	Market Buy	株式会社SIMPLEX SIMPLEX K.K.	strategic	9.4K	¥1,703	-55.5%	¥6M ($39K)
2022-08-23	SELL	negotiated	株式会社SIMPLEX SIMPLEX K.K.	strategic	9.5K	¥884	+14.4%	¥75K ($485)
2022-08-23	BUY	negotiated	株式会社BSM BSM Co., Ltd.	strategic	250.5K	¥884	-14.4%	¥218M ($1.4M)
2022-08-22	SELL	unknown	水嶋浩雅 Hiromasa Mizushima	activist	208.0K	¥884	+14.4%	¥117M ($753K)
2022-08-18	BUY	unknown	水嶋浩雅 Hiromasa Mizushima	activist	340.0K	¥884	-	¥34M ($221K)
2022-08-18	SELL	unknown	水嶋浩雅 Hiromasa Mizushima	activist	340.0K	¥884	+14.4%	¥34M ($221K)
2022-01-12	BUY	Market Buy	株式会社SIMPLEX SIMPLEX K.K.	strategic	9.6K	¥634	+19.4%	¥2M ($15K)
2022-01-12	BUY	Market Buy	株式会社BSM BSM Co., Ltd.	strategic	415.4K	¥634	+19.4%	¥105M ($675K)
2021-08-18	SELL	negotiated	株式会社SIMPLEX SIMPLEX K.K.	strategic	9.7K	¥463.5	-63.3%	¥65K ($422)
2021-08-18	BUY	negotiated	株式会社BSM BSM Co., Ltd.	strategic	415.3K	¥463.5	+63.3%	¥189M ($1.2M)
2021-08-13	SELL	unknown	水嶋浩雅 Hiromasa Mizushima	activist	340.0K	¥463.5	-63.3%	¥18M ($116K)
2021-07-12	SELL	Market Buy	株式会社SIMPLEX SIMPLEX K.K.	strategic	9.8K	¥463.5	-63.3%	¥303M ($2.0M)
2021-07-12	BUY	Market Buy	株式会社BSM BSM Co., Ltd.	strategic	695.2K	¥463.5	+63.3%	¥106M ($683K)

Frequently asked questions

Who has been buying Simplex Financial Holdings Co., Ltd. stock?: 4 distinct investors have filed 19 disclosed large-shareholding filings in Simplex Financial Holdings Co., Ltd. (7176), most recently on 2026-01-23. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Simplex Financial Holdings Co., Ltd. have?: Simplex Financial Holdings Co., Ltd. has 19 buy-side and 12 sell-side disclosures on record, covering ¥14.4B ($92.8M) in total reported value, spanning 2021-07-12 to 2026-01-23.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.