Who has been buying Osaka Yuka Industry Ltd. stock?

7 distinct investors have filed 25 disclosed large-shareholding filings in Osaka Yuka Industry Ltd. (4124), most recently on 2026-04-07. 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 Osaka Yuka Industry Ltd. have?

Osaka Yuka Industry Ltd. has 25 buy-side and 8 sell-side disclosures on record, covering ¥2.5B ($16.2M) in total reported value, spanning 2021-04-07 to 2026-04-07.

Where does StockDrifts get Osaka Yuka Industry Ltd. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

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.

Osaka Yuka Industry Ltd. 4124

Company

大阪油化工業株式会社Osaka Yuka Industry Ltd.

Investors

Buys

Total Value

¥2.5B ($16.2M)

Avg Return

+32.29%

Last Filing

2026-04-07

Osaka Yuka Industry Ltd. (4124) has 25 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥2.5B ($16.2M) in reported transaction value. The earliest filing StockDrifts holds for Osaka Yuka Industry Ltd. is dated 2021-04-07; the most recent is 2026-04-07. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +32.29%, 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
2026-04-07	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	42.5K	¥2,716	-0.6%	¥115M ($745K)
2026-02-12	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	357.4K	¥2,448	+10.3%	¥875M ($5.6M)
2025-12-26	SELL	unknown	堀田麻美 hotta asami	unknown	0	¥2,440	-10.7%	¥432M ($2.8M)
2025-12-09	BUY	unknown	堀田哲平 Hotta Teppei	other	238.0K	¥2,485	+8.7%	¥591M ($3.8M)
2025-10-28	BUY	unknown	堀田麻美 hotta asami	activist	177.0K	¥2,567	+5.2%	¥454M ($2.9M)
2025-10-28	SELL	unknown	堀田哲平 Hotta Teppei	other	61.0K	¥2,567	-5.2%	¥454M ($2.9M)
2025-10-28	BUY	unknown	堀田哲平 Hotta Teppei	other	61.0K	¥2,567	+5.2%	¥454M ($2.9M)
2025-07-28	BUY	Market Buy	エルアール株式会社 LR.Inc	passive	357.4K	¥2,459	+9.8%	¥485M ($3.1M)
2025-07-28	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	357.4K	¥2,459	+9.8%	¥485M ($3.1M)
2025-07-28	SELL	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	0	¥2,459	-9.8%	¥485M ($3.1M)
2025-07-28	SELL	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	0	¥2,459	-9.8%	¥485M ($3.1M)
2025-07-18	BUY	Market Buy	エルアール株式会社 LR.Inc	passive	160.1K	¥2,480	+8.9%	¥397M ($2.6M)
2025-07-18	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	160.1K	¥2,480	+8.9%	¥397M ($2.6M)
2025-07-18	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥2,480	+8.9%	¥489M ($3.2M)
2025-07-18	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	197.3K	¥2,480	+8.9%	¥489M ($3.2M)
2025-05-21	SELL	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	52.8K	¥2,393	-12.9%	¥29M ($187K)
2025-03-06	SELL	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	64.9K	¥2,387	-13.2%	¥43M ($278K)
2025-02-20	BUY	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	83.0K	¥2,425	+11.4%	¥201M ($1.3M)
2025-01-27	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥3,260	-17.1%	¥643M ($4.1M)
2025-01-27	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	160.1K	¥3,260	-17.1%	¥111M ($718K)
2025-01-24	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	125.9K	¥3,255	-17.0%	¥43M ($280K)
2025-01-24	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥3,255	-17.0%	¥642M ($4.1M)
2025-01-23	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	112.6K	¥3,240	-16.6%	¥84M ($543K)
2025-01-23	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥3,240	-16.6%	¥639M ($4.1M)
2025-01-21	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	86.6K	¥3,215	-16.0%	¥73M ($472K)
2025-01-21	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	86.6K	¥3,215	-16.0%	¥73M ($472K)
2025-01-21	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥3,215	-16.0%	¥634M ($4.1M)
2025-01-21	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	197.3K	¥3,215	-16.0%	¥634M ($4.1M)
2025-01-20	BUY	Market Buy	エルアール株式会社 LR.Inc	activist	63.9K	¥3,200	-15.6%	¥204M ($1.3M)
2025-01-20	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	activist	197.3K	¥3,200	-15.6%	¥631M ($4.1M)
2025-01-14	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	197.3K	¥3,200	-15.6%	¥86M ($552K)
2024-12-20	BUY	Market Buy	堀田哲平 Hotta Teppei	other	238.0K	¥3,185	-15.2%	¥13M ($82K)
2024-12-02	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	170.6K	¥1,568	+72.3%	¥18M ($115K)
2024-09-17	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	159.2K	¥1,500	+80.1%	¥16M ($106K)
2024-08-01	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	148.2K	¥1,481	+82.4%	¥18M ($114K)
2024-05-31	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	136.3K	¥1,483	+82.1%	¥18M ($114K)
2024-04-18	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	124.4K	¥1,505	+79.5%	¥16M ($105K)
2024-03-08	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	113.6K	¥1,471	+83.6%	¥16M ($104K)
2024-01-29	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	102.6K	¥1,564	+72.7%	¥18M ($115K)
2023-12-04	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	91.3K	¥1,590	+69.9%	¥22M ($139K)
2023-11-17	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	77.7K	¥1,585	+70.4%	¥20M ($128K)
2023-10-31	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	65.2K	¥1,713	+57.7%	¥18M ($119K)
2023-10-25	BUY	Market Buy	GLOBAL MANAGEMENT PARTNERS LIMITED Global Management Partners Limited	passive	54.4K	¥1,680	+60.8%	¥91M ($590K)
2023-06-06	SELL	Market Buy	重田光時 Mitsutoki Shigeta	passive	0	¥1,899	-42.2%	¥103M ($662K)
2023-06-06	BUY	Market Buy	重田光時 Mitsutoki Shigeta	passive	0	¥1,899	+42.2%	¥103M ($662K)
2022-10-05	BUY	Market Buy	重田光時 Mitsutoki Shigeta	passive	54.0K	¥1,427	+89.3%	¥77M ($497K)
2021-12-02	SELL	unknown	堀田哲平 Hotta Teppei	other	234.0K	¥1,670	-61.7%	¥88M ($570K)
2021-04-07	BUY	unknown	堀田哲平 Hotta Teppei	other	287.0K	¥2,678	+0.9%	¥769M ($5.0M)
2021-04-07	BUY	unknown	堀田哲平 Hotta Teppei	other	287.0K	¥2,678	+0.9%	¥769M ($5.0M)

Frequently asked questions

Who has been buying Osaka Yuka Industry Ltd. stock?: 7 distinct investors have filed 25 disclosed large-shareholding filings in Osaka Yuka Industry Ltd. (4124), most recently on 2026-04-07. 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 Osaka Yuka Industry Ltd. have?: Osaka Yuka Industry Ltd. has 25 buy-side and 8 sell-side disclosures on record, covering ¥2.5B ($16.2M) in total reported value, spanning 2021-04-07 to 2026-04-07.
Where does StockDrifts get Osaka Yuka Industry Ltd. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
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.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Osaka Yuka Industry Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.