Who has been buying Happinet Corporation stock?

3 distinct investors have filed 19 disclosed large-shareholding filings in Happinet Corporation (7552), most recently on 2026-03-31. 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 Happinet Corporation have?

Happinet Corporation has 19 buy-side and 6 sell-side disclosures on record, covering ¥8.2B ($53.1M) in total reported value, spanning 2021-03-22 to 2026-03-31.

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.

Happinet Corporation 7552

Company

株式会社ハピネットHappinet Corporation

Investors

Buys

Total Value

¥8.2B ($53.1M)

Avg Return

+133.04%

Last Filing

2026-03-31

Happinet Corporation (7552) has 19 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥8.2B ($53.1M) in reported transaction value. The earliest filing StockDrifts holds for Happinet Corporation is dated 2021-03-22; the most recent is 2026-03-31. Across these filings the average return since disclosure is +133.04%, 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
2026-09-16	BUY	unknown	株式会社三井住友銀行	other	1.4M	¥3,930	-	-
2026-09-16	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	4.2M	¥3,930	+3.7%	¥1.9B ($12.3M)
2026-08-17	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	3.7M	¥3,455	-17.9%	¥698M ($4.5M)
2026-08-17	BUY	unknown	株式会社三井住友銀行	other	1.4M	¥3,455	-	-
2026-08-17	SELL	unknown	SMBC日興証券株式会社	other	22.7K	¥3,455	-17.9%	¥881M ($5.7M)
2026-03-31	BUY	unknown	SMBC日興証券株式会社	other	280.6K	¥2,687	-	¥754M ($4.9M)
2026-03-31	BUY	unknown	株式会社三井住友銀行	other	1.4M	¥2,687	-	-
2026-03-31	BUY	unknown	三井住友DSアセットマネジメント株式会社	passive	3.9M	¥2,687	+51.7%	¥763M ($4.9M)
2025-10-23	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	1.8M	¥3,300	+23.5%	¥881M ($5.7M)
2025-10-23	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥3,300	-	-
2025-04-10	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	21.6K	¥2,425	-68.0%	¥717M ($4.6M)
2025-04-10	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥2,425	-	-
2025-04-10	BUY	unknown	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	1.5M	¥2,425	+68.0%	¥82M ($527K)
2025-03-05	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	317.9K	¥2,492.5	-	¥792M ($5.1M)
2025-03-05	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥2,492.5	-	-
2025-03-05	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	1.5M	¥2,492.5	+63.5%	¥276M ($1.8M)
2024-11-08	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	1.4M	¥2,007.5	+103.0%	¥575M ($3.7M)
2024-11-08	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥2,007.5	-	-
2024-11-08	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	20.4K	¥2,007.5	+103.0%	¥3.8B ($24.5M)
2024-04-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	31.1K	¥1,457	-179.7%	¥305M ($2.0M)
2024-04-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥1,457	-	-
2024-04-22	SELL	unknown	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	1.1M	¥1,457	-179.7%	¥60M ($384K)
2024-03-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	240.1K	¥1,587.5	-	¥381M ($2.5M)
2024-03-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥1,587.5	-	-
2024-03-07	BUY	unknown	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	1.1M	¥1,587.5	+156.7%	¥302M ($1.9M)
2023-11-08	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	6.6K	¥1,203	+238.7%	¥767M ($4.9M)
2023-11-08	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	944.5K	¥1,203	+238.7%	¥518M ($3.3M)
2023-11-08	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥1,203	-	-
2023-05-10	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	513.6K	¥984.5	+313.9%	¥506M ($3.3M)
2023-05-10	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥984.5	+313.9%	¥666M ($4.3M)
2023-05-10	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	84.3K	¥984.5	+313.9%	¥83M ($536K)
2023-04-21	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	82.7K	¥944.5	-331.4%	¥568M ($3.7M)
2023-04-21	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥944.5	-	-
2023-04-21	SELL	unknown	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	442.3K	¥944.5	-331.4%	¥9M ($59K)
2023-03-23	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	682.9K	¥937	+334.9%	¥478M ($3.1M)
2023-03-23	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥937	-	-
2023-03-23	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	452.2K	¥937	+334.9%	¥7M ($44K)
2022-12-22	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	444.7K	¥947.5	+330.1%	¥421M ($2.7M)
2022-12-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥947.5	+330.1%	¥641M ($4.1M)
2022-12-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	172.9K	¥947.5	+330.1%	¥164M ($1.1M)
2021-05-12	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	34.6K	¥752	-441.9%	¥432M ($2.8M)
2021-05-12	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥752	-	-
2021-03-22	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	608.6K	¥696.727	+484.9%	¥424M ($2.7M)
2021-03-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	676.0K	¥696.727	+484.9%	¥471M ($3.0M)

Frequently asked questions

Who has been buying Happinet Corporation stock?: 3 distinct investors have filed 19 disclosed large-shareholding filings in Happinet Corporation (7552), most recently on 2026-03-31. 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 Happinet Corporation have?: Happinet Corporation has 19 buy-side and 6 sell-side disclosures on record, covering ¥8.2B ($53.1M) in total reported value, spanning 2021-03-22 to 2026-03-31.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.