Who has been buying BPLATS,Inc. stock?

5 distinct investors have filed 6 disclosed large-shareholding filings in BPLATS,Inc. (4381), most recently on 2026-04-02. 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 BPLATS,Inc. have?

BPLATS,Inc. has 6 buy-side and 26 sell-side disclosures on record, covering ¥559M ($3.6M) in total reported value, spanning 2023-07-24 to 2026-04-02.

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.

BPLATS,Inc. 4381

Company

ビープラッツ株式会社BPLATS,Inc.

Investors

Buys

Total Value

¥559M ($3.6M)

Avg Return

-47.47%

Last Filing

2026-04-02

BPLATS,Inc. (4381) has 6 disclosed large-shareholding filings and 26 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥559M ($3.6M) in reported transaction value. The earliest filing StockDrifts holds for BPLATS,Inc. is dated 2023-07-24; the most recent is 2026-04-02. Across these filings the average return since disclosure is -47.47%, 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
2026-09-25	SELL	subscription	篠﨑明 Akira Shinozaki	passive	156.0K	¥212	+0.0%	¥8M ($49K)
2026-09-24	BUY	unknown	ノムラインターナショナルピーエルシー(NOMURA INTERNATIONAL PLC) NOMURA INTERNATIONAL PLC	other	239.3K	¥224	-5.4%	¥54M ($346K)
2026-09-18	SELL	unknown	古川徳厚	other	1.1M	¥210	-0.9%	¥5M ($31K)
2026-09-18	SELL	subscription	グロースパートナーズ株式会社	other	1.1M	¥210	-0.9%	¥5M ($31K)
2026-09-16	SELL	unknown	古川徳厚	other	1.2M	¥221	+4.1%	¥4M ($26K)
2026-09-16	SELL	subscription	グロースパートナーズ株式会社	other	1.2M	¥221	+4.1%	¥4M ($26K)
2026-09-09	SELL	unknown	古川徳厚	other	1.2M	¥254	+16.5%	¥10M ($65K)
2026-09-09	SELL	subscription	グロースパートナーズ株式会社	other	1.2M	¥254	+16.5%	¥10M ($65K)
2026-09-04	SELL	unknown	古川徳厚	other	1.2M	¥285	+25.6%	¥7M ($45K)
2026-09-04	SELL	subscription	グロースパートナーズ株式会社	other	1.2M	¥285	+25.6%	¥7M ($45K)
2026-09-02	SELL	unknown	古川徳厚	other	1.3M	¥275	+22.9%	¥10M ($65K)
2026-09-02	SELL	subscription	グロースパートナーズ株式会社	other	1.3M	¥275	+22.9%	¥10M ($65K)
2026-08-31	SELL	unknown	古川徳厚	other	1.3M	¥300	+29.3%	¥11M ($69K)
2026-08-31	SELL	subscription	グロースパートナーズ株式会社	other	1.3M	¥300	+29.3%	¥11M ($69K)
2026-08-27	SELL	subscription	グロースパートナーズ株式会社	other	1.4M	¥288	+26.4%	¥7M ($44K)
2026-08-27	SELL	unknown	古川徳厚	other	1.4M	¥288	+26.4%	¥7M ($44K)
2026-08-26	SELL	unknown	古川徳厚	other	1.4M	¥293	+27.6%	¥8M ($50K)
2026-08-26	SELL	subscription	グロースパートナーズ株式会社	other	1.4M	¥293	+27.6%	¥8M ($50K)
2026-08-25	SELL	unknown	古川徳厚	other	1.5M	¥309	+31.4%	¥9M ($61K)
2026-08-25	SELL	subscription	グロースパートナーズ株式会社	other	1.5M	¥309	+31.4%	¥9M ($61K)
2026-08-21	SELL	subscription	グロースパートナーズ株式会社	other	1.5M	¥355	+40.3%	¥1M ($9K)
2026-08-21	SELL	unknown	古川徳厚	other	1.5M	¥355	+40.3%	¥1M ($9K)
2026-08-19	SELL	subscription	グロースパートナーズ株式会社	other	1.5M	¥344	+38.4%	¥8M ($53K)
2026-08-19	SELL	unknown	古川徳厚	other	1.5M	¥344	+38.4%	¥8M ($53K)
2026-08-18	SELL	subscription	グロースパートナーズ株式会社	other	1.6M	¥392	+45.9%	¥14M ($88K)
2026-08-18	SELL	unknown	古川徳厚	other	1.6M	¥392	+45.9%	¥14M ($88K)
2026-08-17	SELL	subscription	グロースパートナーズ株式会社	other	1.6M	¥405	+47.6%	¥11M ($72K)
2026-08-17	SELL	unknown	古川徳厚	other	1.6M	¥405	+47.6%	¥11M ($72K)
2026-08-14	SELL	subscription	グロースパートナーズ株式会社	other	1.7M	¥429	+50.6%	¥6M ($38K)
2026-08-14	SELL	unknown	古川徳厚	other	1.7M	¥429	+50.6%	¥6M ($38K)
2026-08-07	SELL	subscription	グロースパートナーズ株式会社	other	1.7M	¥398	+46.7%	¥19M ($124K)
2026-08-07	SELL	subscription	グロースパートナーズ株式会社	other	1.7M	¥398	+46.7%	¥129M ($831K)
2026-08-07	SELL	unknown	古川徳厚	other	1.7M	¥398	+46.7%	¥129M ($831K)
2026-08-07	SELL	unknown	古川徳厚	other	1.7M	¥398	+46.7%	¥19M ($124K)
2026-08-06	SELL	unknown	古川徳厚	other	1.7M	¥409	+48.2%	¥15M ($94K)
2026-08-06	SELL	subscription	グロースパートナーズ株式会社	other	1.7M	¥409	+48.2%	¥15M ($94K)
2026-07-30	SELL	unknown	古川徳厚	other	1.8M	¥272	+22.1%	¥9M ($61K)
2026-07-30	SELL	subscription	グロースパートナーズ株式会社	other	1.8M	¥272	+22.1%	¥9M ($61K)
2026-07-22	SELL	subscription	グロースパートナーズ株式会社	other	1.8M	¥354	+40.1%	¥3M ($22K)
2026-07-22	SELL	unknown	古川徳厚	other	1.8M	¥354	+40.1%	¥3M ($22K)
2026-07-17	SELL	subscription	グロースパートナーズ株式会社	other	1.8M	¥514	+58.8%	¥50M ($320K)
2026-07-17	SELL	unknown	古川徳厚	other	1.8M	¥514	+58.8%	¥50M ($320K)
2026-06-22	BUY	subscription	グロースパートナーズ株式会社	other	1.9M	¥245	-13.5%	¥113M ($726K)
2026-06-22	BUY	Market Buy	古川徳厚	other	1.9M	¥245	-13.5%	¥113M ($726K)
2026-06-22	BUY	subscription	グロースパートナーズ株式会社	other	1.9M	¥245	-13.5%	¥111M ($716K)
2026-06-22	BUY	Market Buy	古川徳厚	other	1.9M	¥245	-13.5%	¥111M ($716K)
2026-04-02	SELL	subscription	グロースパートナーズ株式会社	other	927.1K	¥401	+47.1%	¥4M ($26K)
2026-04-02	SELL	subscription	古川徳厚	other	927.1K	¥401	+47.1%	¥4M ($26K)
2026-03-31	SELL	subscription	古川徳厚	other	927.1K	¥430	+50.7%	¥7M ($48K)
2026-03-31	SELL	subscription	グロースパートナーズ株式会社	other	927.1K	¥430	+50.7%	¥7M ($48K)

Showing the 50 most recent of 78 filings.

Frequently asked questions

Who has been buying BPLATS,Inc. stock?: 5 distinct investors have filed 6 disclosed large-shareholding filings in BPLATS,Inc. (4381), most recently on 2026-04-02. 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 BPLATS,Inc. have?: BPLATS,Inc. has 6 buy-side and 26 sell-side disclosures on record, covering ¥559M ($3.6M) in total reported value, spanning 2023-07-24 to 2026-04-02.
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.