Who has been buying EF-ON Inc. stock?

9 distinct investors have filed 8 disclosed large-shareholding filings in EF-ON Inc. (9514), most recently on 2026-03-24. 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 EF-ON Inc. have?

EF-ON Inc. has 8 buy-side and 6 sell-side disclosures on record, covering ¥1.5B ($9.7M) in total reported value, spanning 2021-04-07 to 2026-03-24.

Where does StockDrifts get EF-ON Inc. 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.

EF-ON Inc. 9514

Company

株式会社エフオンEF-ON Inc.

Investors

Buys

Total Value

¥1.5B ($9.7M)

Avg Return

-57.38%

Last Filing

2026-03-24

EF-ON Inc. (9514) has 8 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥1.5B ($9.7M) in reported transaction value. The earliest filing StockDrifts holds for EF-ON Inc. is dated 2021-04-07; the most recent is 2026-03-24. 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 -57.38%, 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
2026-03-24	BUY	Market Buy	株式会社UH6	passive	1.6M	¥354	-5.6%	¥599M ($3.9M)
2026-03-24	SELL	Market Buy	株式会社UH5	unknown	0	¥354	-5.6%	-
2026-03-24	BUY	Market Buy	株式会社UH Partners 2	passive	264.2K	¥354	-5.6%	¥99M ($637K)
2026-03-24	BUY	Market Buy	光通信株式会社	passive	452.3K	¥354	-5.6%	¥169M ($1.1M)
2025-09-29	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	1.6M	¥439	-14.8%	¥703M ($4.5M)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	264.2K	¥439	-14.8%	¥116M ($748K)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	452.3K	¥439	-14.8%	¥199M ($1.3M)
2025-06-17	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	885.7K	¥333	-12.3%	¥73M ($474K)
2025-03-17	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	1.6M	¥356	+5.1%	¥570M ($3.7M)
2025-03-17	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	unknown	0	¥356	-5.1%	¥156M ($1.0M)
2025-03-17	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	264.2K	¥356	+5.1%	¥94M ($607K)
2025-03-17	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	452.3K	¥356	-5.1%	¥414M ($2.7M)
2023-03-17	BUY	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	1.1M	¥631	-40.7%	¥698M ($4.5M)
2023-02-17	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	1.0M	¥570	+34.4%	¥171M ($1.1M)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.6M	¥567	+34.0%	¥249M ($1.6M)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	440.3K	¥567	-34.0%	¥250M ($1.6M)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	264.2K	¥567	-34.0%	¥150M ($966K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	264.2K	¥681	-45.1%	¥41M ($266K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.1M	¥681	-45.1%	¥1.4B ($9.0M)
2021-09-24	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	773.9K	¥893	-58.1%	¥682M ($4.4M)
2021-09-24	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	109.8K	¥893	-58.1%	¥35M ($224K)
2021-09-24	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.9K	¥893	-58.1%	¥193M ($1.2M)
2021-04-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.0M	¥1,109	-66.3%	¥1.2B ($7.4M)
2021-04-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	72.4K	¥1,109	-66.3%	¥80M ($518K)
2021-04-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-200	¥1,109	-66.3%	-

Frequently asked questions

Who has been buying EF-ON Inc. stock?: 9 distinct investors have filed 8 disclosed large-shareholding filings in EF-ON Inc. (9514), most recently on 2026-03-24. 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 EF-ON Inc. have?: EF-ON Inc. has 8 buy-side and 6 sell-side disclosures on record, covering ¥1.5B ($9.7M) in total reported value, spanning 2021-04-07 to 2026-03-24.
Where does StockDrifts get EF-ON Inc. 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 EF-ON Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.