Who has been buying Ishizuka Glass Co., Ltd. stock?

12 distinct investors have filed 13 disclosed large-shareholding filings in Ishizuka Glass Co., Ltd. (5204), most recently on 2024-11-08. 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 Ishizuka Glass Co., Ltd. have?

Ishizuka Glass Co., Ltd. has 13 buy-side and 15 sell-side disclosures on record, covering ¥1.0B ($6.5M) in total reported value, spanning 2021-03-22 to 2024-11-08.

Where does StockDrifts get Ishizuka Glass 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.

Ishizuka Glass Co., Ltd. 5204

Company

石塚硝子株式会社Ishizuka Glass Co., Ltd.

Investors

Buys

Total Value

¥1.0B ($6.5M)

Avg Return

+72.48%

Last Filing

2024-11-08

Ishizuka Glass Co., Ltd. (5204) has 13 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥1.0B ($6.5M) in reported transaction value. The earliest filing StockDrifts holds for Ishizuka Glass Co., Ltd. is dated 2021-03-22; the most recent is 2024-11-08. 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 +72.48%, 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
2024-11-08	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	6.0K	¥2,415	+40.0%	¥15M ($94K)
2024-11-08	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥2,415	+40.0%	¥210M ($1.4M)
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	191.6K	¥2,415	+40.0%	¥140M ($901K)
2024-08-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥2,398	+41.0%	¥209M ($1.3M)
2024-08-07	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	133.7K	¥2,398	+41.0%	¥321M ($2.1M)
2023-10-20	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	1.6K	¥2,521	+34.1%	¥215M ($1.4M)
2023-10-20	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	122.8K	¥2,521	+34.1%	¥310M ($2.0M)
2023-10-20	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥2,521	+34.1%	¥219M ($1.4M)
2023-04-17	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	1.1K	¥1,547	+118.5%	¥118M ($762K)
2023-04-17	SELL	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	2.2K	¥1,547	-118.5%	¥11M ($72K)
2023-04-17	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	15.1K	¥1,547	+118.5%	¥23M ($151K)
2023-04-17	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	40.8K	¥1,547	-118.5%	¥6M ($38K)
2023-04-17	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥1,547	+118.5%	¥204M ($1.3M)
2023-02-20	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	44.7K	¥1,445	-133.9%	¥12M ($75K)
2023-02-20	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	50.4K	¥1,445	+133.9%	¥62M ($401K)
2023-02-20	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	9.4K	¥1,445	+133.9%	¥14M ($88K)
2023-02-20	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	15.3K	¥1,445	-133.9%	¥7M ($43K)
2023-02-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥1,445	+133.9%	¥190M ($1.2M)
2022-10-21	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	19.9K	¥1,504	-124.7%	¥82M ($528K)
2022-10-21	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	65.8K	¥1,504	+124.7%	¥99M ($638K)
2022-10-21	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	173.7K	¥1,504	+124.7%	¥261M ($1.7M)
2022-04-04	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	7.0K	¥2,080	-62.5%	¥151M ($974K)
2022-04-04	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	19.9K	¥2,080	+62.5%	¥41M ($267K)
2022-04-04	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	52.8K	¥2,080	-62.5%	¥4M ($23K)
2022-04-04	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥2,080	+62.5%	¥274M ($1.8M)
2022-03-07	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	79.8K	¥2,040	+65.7%	¥151M ($977K)
2022-03-07	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	19.8K	¥2,040	+65.7%	¥2M ($11K)
2022-03-07	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	54.6K	¥2,040	-65.7%	¥12M ($78K)
2022-03-07	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥2,040	+65.7%	¥269M ($1.7M)
2022-02-07	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	122.9K	¥2,043	+65.4%	¥251M ($1.6M)
2022-02-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥2,043	+65.4%	¥178M ($1.1M)
2022-02-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	83.4K	¥2,043	+65.4%	¥141M ($912K)
2021-12-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	74.1K	¥1,957	+72.7%	¥3M ($21K)
2021-12-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	65.8K	¥1,957	-72.7%	¥2M ($16K)
2021-12-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	200	¥1,957	-72.7%	¥8M ($53K)
2021-12-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	173.7K	¥1,957	-72.7%	¥7M ($48K)
2021-04-07	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	122.8K	¥2,011	+68.1%	¥247M ($1.6M)
2021-04-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥2,011	+68.1%	¥175M ($1.1M)
2021-04-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	14.4K	¥2,011	-68.1%	¥120M ($772K)
2021-04-05	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	5.3K	¥1,793.017	-88.5%	¥171M ($1.1M)
2021-04-05	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	18.9K	¥1,793.017	+88.5%	¥34M ($219K)
2021-04-05	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	60.2K	¥1,793.017	-88.5%	¥3M ($20K)
2021-04-05	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥1,793.017	+88.5%	¥236M ($1.5M)
2021-03-29	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	100.8K	¥1,803.722	-87.4%	¥4M ($25K)
2021-03-29	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	18.9K	¥1,803.722	+87.4%	¥761K ($5K)
2021-03-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	62.0K	¥1,803.722	+87.4%	¥2M ($15K)
2021-03-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	131.8K	¥1,803.722	+87.4%	¥238M ($1.5M)
2021-03-22	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	122.8K	¥1,783.205	+89.5%	¥219M ($1.4M)
2021-03-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	87.0K	¥1,783.205	+89.5%	¥155M ($1.0M)
2021-03-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	74.0K	¥1,783.205	+89.5%	¥121M ($782K)

Frequently asked questions

Who has been buying Ishizuka Glass Co., Ltd. stock?: 12 distinct investors have filed 13 disclosed large-shareholding filings in Ishizuka Glass Co., Ltd. (5204), most recently on 2024-11-08. 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 Ishizuka Glass Co., Ltd. have?: Ishizuka Glass Co., Ltd. has 13 buy-side and 15 sell-side disclosures on record, covering ¥1.0B ($6.5M) in total reported value, spanning 2021-03-22 to 2024-11-08.
Where does StockDrifts get Ishizuka Glass 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 Ishizuka Glass Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.