Who has been buying Yotai Refractories Co., Ltd. stock?

5 distinct investors have filed 12 disclosed large-shareholding filings in Yotai Refractories Co., Ltd. (5357), most recently on 2026-04-20. 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 Yotai Refractories Co., Ltd. have?

Yotai Refractories Co., Ltd. has 12 buy-side and 14 sell-side disclosures on record, covering ¥35.7B ($230.2M) in total reported value, spanning 2021-04-12 to 2026-04-20.

Where does StockDrifts get Yotai Refractories 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.

Yotai Refractories Co., Ltd. 5357

Company

株式会社ヨータイYotai Refractories Co., Ltd.

Investors

Buys

Total Value

¥35.7B ($230.2M)

Avg Return

+13.97%

Last Filing

2026-04-20

Yotai Refractories Co., Ltd. (5357) has 12 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥35.7B ($230.2M) in reported transaction value. The earliest filing StockDrifts holds for Yotai Refractories Co., Ltd. is dated 2021-04-12; the most recent is 2026-04-20. 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 +13.97%, 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
2026-07-31	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	2.2M	¥1,756	-3.0%	¥348M ($2.2M)
2026-04-20	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	2.3M	¥1,746	+1.7%	¥349M ($2.3M)
2025-10-06	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	2.5M	¥1,722	-1.4%	¥361M ($2.3M)
2025-08-26	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	2.8M	¥1,725	-1.2%	¥341M ($2.2M)
2025-08-26	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	2.8M	¥1,725	-1.2%	¥341M ($2.2M)
2025-07-18	BUY	unknown	ASNFホールディングス合同会社 ASNF HOLDINGS GK	strategic	6.5M	¥1,681	+3.9%	¥11.0B ($70.8M)
2025-05-21	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	3.0M	¥1,743	-0.2%	¥482M ($3.1M)
2025-05-21	SELL	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	76.1K	¥1,743	-0.2%	¥1.6B ($10.0M)
2025-05-21	BUY	acquisition	ASNFホールディングス合同会社 ASNF HOLDINGS GK	strategic	6.5M	¥1,743	+0.2%	¥11.4B ($73.4M)
2025-05-21	BUY	Market Buy	UGSアセットマネジメント株式会社 UGS Asset Management	passive	138.4K	¥1,743	+0.2%	¥20.8B ($134.3M)
2025-05-21	SELL	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	111.4K	¥1,743	-0.2%	¥2.3B ($15.0M)
2024-11-22	SELL	unknown	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	3.2M	¥1,551	-12.6%	¥556M ($3.6M)
2024-11-22	BUY	Market Buy	住友大阪セメント株式会社 Sumitomo Osaka Cement Co.,Ltd.	strategic	3.6M	¥1,551	+12.6%	¥1.3B ($8.4M)
2024-07-23	SELL	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	968.2K	¥1,800	+3.0%	¥145M ($933K)
2024-07-23	SELL	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	968.2K	¥1,800	+3.0%	¥145M ($933K)
2024-07-23	SELL	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	968.2K	¥1,800	+3.0%	¥145M ($933K)
2024-07-23	SELL	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.4M	¥1,800	+3.0%	¥215M ($1.4M)
2024-07-23	SELL	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.4M	¥1,800	+3.0%	¥215M ($1.4M)
2024-07-23	SELL	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.4M	¥1,800	+3.0%	¥215M ($1.4M)
2024-05-27	BUY	Market Buy	UGSアセットマネジメント株式会社 UGS Asset Management	passive	1.9M	¥1,775	-1.6%	¥908M ($5.9M)
2024-05-17	BUY	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.6M	¥1,792	-2.6%	¥987M ($6.4M)
2024-05-17	BUY	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	1.0M	¥1,792	-2.6%	¥232M ($1.5M)
2024-05-17	BUY	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	1.0M	¥1,792	-2.6%	¥232M ($1.5M)
2024-05-17	BUY	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.6M	¥1,792	-2.6%	¥987M ($6.4M)
2022-07-06	BUY	Market Buy	UGSアセットマネジメント株式会社 UGS Asset Management	passive	1.8M	¥1,403	+24.4%	¥366M ($2.4M)
2022-02-08	BUY	Market Buy	有限会社キャピタル・マネジメント Capital Management	passive	1.2M	¥1,271	+37.4%	¥1.5B ($9.8M)
2022-02-08	BUY	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	1.3M	¥1,271	+37.4%	¥205M ($1.3M)
2021-08-23	BUY	Market Buy	UGSアセットマネジメント株式会社 UGS Asset Management	passive	1.6M	¥1,248	+39.9%	¥319M ($2.1M)
2021-04-12	BUY	Market Buy	UGSアセットマネジメント株式会社 UGS Asset Management	passive	1.3M	¥1,059	+64.9%	¥1.4B ($8.9M)

Frequently asked questions

Who has been buying Yotai Refractories Co., Ltd. stock?: 5 distinct investors have filed 12 disclosed large-shareholding filings in Yotai Refractories Co., Ltd. (5357), most recently on 2026-04-20. 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 Yotai Refractories Co., Ltd. have?: Yotai Refractories Co., Ltd. has 12 buy-side and 14 sell-side disclosures on record, covering ¥35.7B ($230.2M) in total reported value, spanning 2021-04-12 to 2026-04-20.
Where does StockDrifts get Yotai Refractories 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 Yotai Refractories Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.