Who has been buying Kogi Corporation stock?

10 distinct investors have filed 2 disclosed large-shareholding filings in Kogi Corporation (5603), most recently on 2025-04-28. 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 Kogi Corporation have?

Kogi Corporation has 2 buy-side and 4 sell-side disclosures on record, covering ¥67M ($430K) in total reported value, spanning 2021-04-06 to 2025-04-28.

Where does StockDrifts get Kogi Corporation 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.

Kogi Corporation 5603

Company

虹技株式会社Kogi Corporation

Investors

Buys

Total Value

¥67M ($430K)

Avg Return

+24.24%

Last Filing

2025-04-28

Kogi Corporation (5603) has 2 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥67M ($430K) in reported transaction value. The earliest filing StockDrifts holds for Kogi Corporation is dated 2021-04-06; the most recent is 2025-04-28. 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 +24.24%, 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
2026-05-20	BUY	unknown	三井住友カード株式会社	other	53.5K	¥1,251	-2.9%	¥67M ($432K)
2026-05-20	BUY	unknown	株式会社日本総合研究所	other	25.0K	¥1,251	-2.9%	¥31M ($202K)
2026-05-20	BUY	unknown	株式会社三井住友銀行	other	148.7K	¥1,251	-2.9%	¥186M ($1.2M)
2026-05-20	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.2K	¥1,251	+2.9%	¥45M ($288K)
2025-04-28	BUY	Market Buy	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	53.5K	¥1,252	+15.0%	¥23M ($149K)
2025-04-28	BUY	Market Buy	株式会社日本総合研究所 Japan Research Institute Co., Ltd.	other	25.0K	¥1,252	+15.0%	¥31M ($202K)
2025-04-28	SELL	Market Buy	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	0	¥1,252	-15.0%	¥23M ($149K)
2025-04-28	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	148.7K	¥1,252	+15.0%	¥186M ($1.2M)
2025-04-28	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	37.1K	¥1,252	+15.0%	¥46M ($300K)
2024-07-30	BUY	Market Buy	虹技取引先持株会理事長髙原義弘 YOSHIHIRO TAKAHARA	strategic	208.9K	¥1,079	+33.5%	¥44M ($281K)
2024-07-30	BUY	negotiated	虹技取引先持株会理事長髙原義弘 YOSHIHIRO TAKAHARA	strategic	208.9K	¥1,079	+33.5%	¥44M ($281K)
2023-08-04	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	23.1K	¥1,272	-13.2%	¥23M ($146K)
2023-08-04	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	47.5K	¥1,272	-13.2%	¥25M ($163K)
2023-08-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	60.1K	¥1,272	+13.2%	¥76M ($493K)
2021-04-21	BUY	unknown	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	35.0K	¥1,153	+24.9%	¥40M ($260K)
2021-04-21	BUY	unknown	株式会社日本総合研究所 Japan Research Institute Co., Ltd.	other	25.0K	¥1,153	+24.9%	¥29M ($186K)
2021-04-21	BUY	unknown	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	18.5K	¥1,153	+24.9%	¥21M ($138K)
2021-04-21	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	2.5K	¥1,153	-24.9%	¥39M ($253K)
2021-04-21	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	148.7K	¥1,153	+24.9%	¥171M ($1.1M)
2021-04-06	BUY	unknown	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	35.0K	¥1,031.145	+39.6%	¥36M ($233K)
2021-04-06	BUY	unknown	株式会社日本総合研究所 Japan Research Institute Co., Ltd.	other	25.0K	¥1,031.145	+39.6%	¥26M ($166K)
2021-04-06	BUY	unknown	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	18.5K	¥1,031.145	+39.6%	¥19M ($123K)
2021-04-06	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	36.2K	¥1,031.145	+39.6%	¥37M ($241K)
2021-04-06	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	148.7K	¥1,031.145	+39.6%	¥153M ($989K)

Frequently asked questions

Who has been buying Kogi Corporation stock?: 10 distinct investors have filed 2 disclosed large-shareholding filings in Kogi Corporation (5603), most recently on 2025-04-28. 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 Kogi Corporation have?: Kogi Corporation has 2 buy-side and 4 sell-side disclosures on record, covering ¥67M ($430K) in total reported value, spanning 2021-04-06 to 2025-04-28.
Where does StockDrifts get Kogi Corporation 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 Kogi Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.