Who has been buying Auto Server Co., Ltd. stock?

5 distinct investors have filed 12 disclosed large-shareholding filings in Auto Server Co., Ltd. (5589), most recently on 2025-09-29. 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 Auto Server Co., Ltd. have?

Auto Server Co., Ltd. has 12 buy-side and 3 sell-side disclosures on record, covering ¥10.7B ($68.9M) in total reported value, spanning 2023-09-29 to 2025-09-29.

Where does StockDrifts get Auto Server 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.

Auto Server Co., Ltd. 5589

Company

株式会社オートサーバーAuto Server Co., Ltd.

Investors

Buys

Total Value

¥10.7B ($68.9M)

Avg Return

+38.37%

Last Filing

2025-09-29

Auto Server Co., Ltd. (5589) has 12 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥10.7B ($68.9M) in reported transaction value. The earliest filing StockDrifts holds for Auto Server Co., Ltd. is dated 2023-09-29; the most recent is 2025-09-29. 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 +38.37%, 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
2026-07-03	SELL	unknown	朝日ホールディングス株式会社	strategic	4.5M	¥2,729	+1.4%	¥853M ($5.5M)
2026-07-03	SELL	unknown	萩原外志仁	strategic	206.2K	¥2,729	+1.4%	¥38M ($243K)
2026-07-03	SELL	unknown	朝日ホールディングス株式会社	strategic	4.5M	¥2,729	+1.4%	¥853M ($5.5M)
2026-07-03	SELL	unknown	萩原外志仁	strategic	206.2K	¥2,729	+1.4%	¥38M ($243K)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	242.3K	¥2,520	+5.7%	¥154M ($994K)
2025-09-29	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	541.5K	¥2,520	-5.7%	¥9M ($58K)
2025-02-19	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	180.3K	¥1,832	+45.4%	¥131M ($845K)
2025-02-19	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	541.5K	¥1,832	-45.4%	¥5M ($34K)
2024-08-23	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	108.1K	¥1,974	+34.9%	¥144M ($932K)
2024-08-23	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	541.5K	¥1,974	-34.9%	¥8M ($54K)
2024-06-10	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	34.4K	¥1,975	+34.8%	¥68M ($438K)
2024-06-10	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	541.5K	¥1,975	+34.8%	¥72M ($467K)
2024-04-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	504.2K	¥1,960	+35.9%	¥139M ($899K)
2024-03-11	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	432.9K	¥1,801	+47.9%	¥143M ($924K)
2024-01-16	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	346.8K	¥1,870	+42.4%	¥649M ($4.2M)
2023-09-29	BUY	unknown	朝日ホールディングス株式会社 Asahi Holdings Co., Ltd.	strategic	4.5M	¥1,866	+42.7%	¥8.5B ($54.5M)
2023-09-29	BUY	unknown	髙田典明 TAKADA NORIAKI	activist	642.0K	¥1,866	+42.7%	¥1.2B ($7.7M)
2023-09-29	BUY	unknown	萩原外志仁 HAGIWARA TOSHIHITO	strategic	206.2K	¥1,866	+42.7%	¥385M ($2.5M)
2023-09-29	BUY	unknown	朝日ホールディングス株式会社 Asahi Holdings Co., Ltd.	strategic	4.5M	¥1,866	+42.7%	¥8.5B ($54.5M)
2023-09-29	BUY	unknown	萩原外志仁 HAGIWARA TOSHIHITO	strategic	206.2K	¥1,866	+42.7%	¥385M ($2.5M)

Frequently asked questions

Who has been buying Auto Server Co., Ltd. stock?: 5 distinct investors have filed 12 disclosed large-shareholding filings in Auto Server Co., Ltd. (5589), most recently on 2025-09-29. 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 Auto Server Co., Ltd. have?: Auto Server Co., Ltd. has 12 buy-side and 3 sell-side disclosures on record, covering ¥10.7B ($68.9M) in total reported value, spanning 2023-09-29 to 2025-09-29.
Where does StockDrifts get Auto Server 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 Auto Server Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.