Who has been buying Starzen Company Limited stock?

8 distinct investors have filed 22 disclosed large-shareholding filings in Starzen Company Limited (8043), most recently on 2025-04-07. 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 Starzen Company Limited have?

Starzen Company Limited has 22 buy-side and 13 sell-side disclosures on record, covering ¥1.7B ($11.2M) in total reported value, spanning 2022-03-23 to 2025-04-07.

Where does StockDrifts get Starzen Company Limited 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.

Starzen Company Limited 8043

Company

スターゼン株式会社Starzen Company Limited

Investors

Buys

Total Value

¥1.7B ($11.2M)

Avg Return

+41.38%

Last Filing

2025-04-07

Starzen Company Limited (8043) has 22 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥1.7B ($11.2M) in reported transaction value. The earliest filing StockDrifts holds for Starzen Company Limited is dated 2022-03-23; the most recent is 2025-04-07. 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 +41.38%, 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
2025-04-07	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	824.0K	¥924	+29.8%	¥11M ($70K)
2025-04-07	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	974.7K	¥924	-29.8%	¥422M ($2.7M)
2025-04-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	312.8K	¥924	-29.8%	¥833M ($5.4M)
2025-03-24	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	271.4K	¥956.67	-25.3%	¥19M ($120K)
2025-03-24	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	477.3K	¥956.67	-25.3%	¥166M ($1.1M)
2025-03-24	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	404.7K	¥956.67	-25.3%	¥120M ($771K)
2025-03-17	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	94.0K	¥955.33	+25.5%	¥63M ($409K)
2025-03-17	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	90.8K	¥955.33	+25.5%	¥2M ($12K)
2025-03-17	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	318.0K	¥955.33	+25.5%	¥4M ($24K)
2025-03-17	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	279.9K	¥955.33	-25.5%	¥269M ($1.7M)
2025-03-07	SELL	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	290.2K	¥925.33	-29.6%	¥2M ($12K)
2025-03-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥925.33	+29.6%	¥601M ($3.9M)
2025-03-07	BUY	negotiated	三井物産株式会社 Mitsui & Co., LTD.	activist	3.1M	¥925.33	+29.6%	¥2.9B ($18.6M)
2025-03-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	529.5K	¥925.33	+29.6%	¥188M ($1.2M)
2025-03-03	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	90.2K	¥919.67	+30.4%	¥83M ($535K)
2025-03-03	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	26.6K	¥919.67	+30.4%	¥24M ($158K)
2025-03-03	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	314.4K	¥919.67	+30.4%	¥289M ($1.9M)
2025-03-03	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	559.9K	¥919.67	+30.4%	¥515M ($3.3M)
2024-10-22	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	292.6K	¥955.33	+25.5%	¥280M ($1.8M)
2024-10-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥955.33	+25.5%	¥621M ($4.0M)
2024-10-22	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	325.3K	¥955.33	+25.5%	¥311M ($2.0M)
2024-10-07	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	292.6K	¥994.67	-20.5%	¥8M ($50K)
2024-10-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥994.67	+20.5%	¥646M ($4.2M)
2024-10-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	16.7K	¥994.67	-20.5%	¥291M ($1.9M)
2024-07-29	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	20.7K	¥1,036.67	-15.7%	¥59M ($379K)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	80.6K	¥1,036.67	+15.7%	¥32M ($209K)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	300.2K	¥1,036.67	-15.7%	¥18M ($118K)
2024-07-29	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	559.9K	¥1,036.67	-15.7%	¥14M ($91K)
2023-12-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥812	+47.7%	¥528M ($3.4M)
2023-12-07	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	300.2K	¥812	+47.7%	¥57M ($368K)
2023-12-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	310.1K	¥812	+47.7%	¥151M ($972K)
2023-03-23	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	229.6K	¥739.67	+62.1%	¥170M ($1.1M)
2023-03-23	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥739.67	+62.1%	¥481M ($3.1M)
2023-03-23	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	124.2K	¥739.67	+62.1%	¥92M ($592K)
2022-12-22	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	229.0K	¥688.33	+74.2%	¥17M ($113K)
2022-12-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥688.33	+74.2%	¥447M ($2.9M)
2022-12-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	17.0K	¥688.33	-74.2%	¥132M ($850K)
2022-03-23	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	202.2K	¥712.33	+68.3%	¥144M ($929K)
2022-03-23	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	209.8K	¥712.33	+68.3%	¥149M ($964K)
2022-03-23	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	649.9K	¥712.33	+68.3%	¥463M ($3.0M)

Frequently asked questions

Who has been buying Starzen Company Limited stock?: 8 distinct investors have filed 22 disclosed large-shareholding filings in Starzen Company Limited (8043), most recently on 2025-04-07. 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 Starzen Company Limited have?: Starzen Company Limited has 22 buy-side and 13 sell-side disclosures on record, covering ¥1.7B ($11.2M) in total reported value, spanning 2022-03-23 to 2025-04-07.
Where does StockDrifts get Starzen Company Limited 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 Starzen Company Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.