Who has been buying Original Engineering Consultants Co., Ltd. stock?

4 distinct investors have filed 10 disclosed large-shareholding filings in Original Engineering Consultants Co., Ltd. (4642), most recently on 2025-07-30. 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 Original Engineering Consultants Co., Ltd. have?

Original Engineering Consultants Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥301M ($1.9M) in total reported value, spanning 2021-03-19 to 2025-07-30.

Where does StockDrifts get Original Engineering Consultants Co., 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.

Original Engineering Consultants Co., Ltd. 4642

Company

オリジナル設計株式会社Original Engineering Consultants Co., Ltd.

Investors

Buys

Total Value

¥301M ($1.9M)

Avg Return

+30.98%

Last Filing

2025-07-30

Original Engineering Consultants Co., Ltd. (4642) has 10 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥301M ($1.9M) in reported transaction value. The earliest filing StockDrifts holds for Original Engineering Consultants Co., Ltd. is dated 2021-03-19; the most recent is 2025-07-30. 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 +30.98%, 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
2025-07-30	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	129.4K	¥1,529	-1.2%	¥9M ($58K)
2025-07-30	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	152.4K	¥1,529	-1.2%	¥62M ($401K)
2025-07-30	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥1,529	-1.2%	¥42M ($270K)
2025-07-30	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	446.2K	¥1,529	-1.2%	¥35M ($226K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	130.3K	¥923	+63.6%	¥120M ($776K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	130.3K	¥923	+63.6%	¥120M ($776K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	117.7K	¥923	+63.6%	¥9M ($56K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥923	+63.6%	¥504M ($3.3M)
2022-01-18	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	117.7K	¥923	+63.6%	¥9M ($56K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥923	+63.6%	¥504M ($3.3M)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	446.2K	¥923	-63.6%	¥120M ($775K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	446.2K	¥923	-63.6%	¥120M ($775K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	108.5K	¥1,158	+30.4%	¥16M ($105K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥1,158	+30.4%	¥632M ($4.1M)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	576.5K	¥1,158	+30.4%	¥668M ($4.3M)
2021-11-04	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	94.1K	¥1,175	+28.5%	¥93M ($597K)
2021-11-04	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥1,175	+28.5%	¥642M ($4.1M)
2021-11-04	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	576.5K	¥1,175	+28.5%	¥677M ($4.4M)
2021-09-06	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	15.6K	¥1,031	+46.5%	¥16M ($104K)
2021-09-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	546.2K	¥1,031	+46.5%	¥65M ($420K)
2021-09-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	576.5K	¥1,031	+46.5%	¥594M ($3.8M)
2021-03-19	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	483.3K	¥828.811	+82.2%	¥101M ($650K)
2021-03-19	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	576.5K	¥828.811	+82.2%	¥478M ($3.1M)

Frequently asked questions

Who has been buying Original Engineering Consultants Co., Ltd. stock?: 4 distinct investors have filed 10 disclosed large-shareholding filings in Original Engineering Consultants Co., Ltd. (4642), most recently on 2025-07-30. 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 Original Engineering Consultants Co., Ltd. have?: Original Engineering Consultants Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥301M ($1.9M) in total reported value, spanning 2021-03-19 to 2025-07-30.
Where does StockDrifts get Original Engineering Consultants Co., 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 Original Engineering Consultants Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.