Who has been buying kubell Co., Ltd. stock?

7 distinct investors have filed 11 disclosed large-shareholding filings in kubell Co., Ltd. (4448), most recently on 2026-05-12. 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 kubell Co., Ltd. have?

kubell Co., Ltd. has 11 buy-side and 23 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2021-03-19 to 2026-05-12.

Where does StockDrifts get kubell 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.

kubell Co., Ltd. 4448

Company

株式会社kubellkubell Co., Ltd.

Investors

Buys

Total Value

¥2.8B ($18.2M)

Avg Return

-65.16%

Last Filing

2026-05-12

kubell Co., Ltd. (4448) has 11 disclosed large-shareholding filings and 23 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥2.8B ($18.2M) in reported transaction value. The earliest filing StockDrifts holds for kubell Co., Ltd. is dated 2021-03-19; the most recent is 2026-05-12. 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 -65.16%, 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
2026-05-12	BUY	unknown	山本正喜	strategic	1.8M	¥265	+17.4%	¥477M ($3.1M)
2026-05-12	SELL	unknown	株式会社Fun&Creative	strategic	20.5M	¥265	-17.4%	¥50M ($321K)
2026-05-12	BUY	unknown	山本正喜	strategic	1.8M	¥265	+17.4%	¥477M ($3.1M)
2026-05-12	SELL	unknown	株式会社Fun&Creative	strategic	20.5M	¥265	-17.4%	¥50M ($321K)
2026-03-09	SELL	unknown	株式会社Fun&Creative	strategic	20.5M	¥284	-6.0%	¥6.2B ($39.9M)
2026-03-09	BUY	unknown	山本正喜	strategic	1.8M	¥284	-6.0%	¥536M ($3.5M)
2026-03-09	BUY	unknown	山本正喜	unknown	1.8M	¥284	-6.0%	¥536M ($3.5M)
2026-03-09	SELL	unknown	株式会社Fun&Creative	strategic	20.5M	¥284	-6.0%	¥6.2B ($39.9M)
2025-02-13	SELL	unknown	山本正喜 Masaki Yamamoto	strategic	1.8M	¥627	+52.0%	¥16M ($102K)
2025-02-13	SELL	unknown	株式会社Fun&Creative Fun&Creative Co.,Ltd	strategic	20.5M	¥627	+52.0%	¥168M ($1.1M)
2024-09-05	SELL	unknown	株式会社Fun&Creative Fun&Creative Co.,Ltd	strategic	20.5M	¥548	+45.1%	¥514M ($3.3M)
2024-09-05	BUY	unknown	山本正喜 Masaki Yamamoto	strategic	1.8M	¥548	-45.1%	¥14M ($88K)
2024-05-09	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.0M	¥437	+31.1%	¥181M ($1.2M)
2024-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.4M	¥433	+30.5%	¥338M ($2.2M)
2024-03-25	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.2M	¥476	+36.8%	¥263M ($1.7M)
2024-02-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.7M	¥453	+33.5%	¥199M ($1.3M)
2023-09-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.1M	¥928	-67.6%	¥604M ($3.9M)
2023-08-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.5M	¥818	-63.2%	¥375M ($2.4M)
2023-05-10	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.0M	¥1,225	-75.4%	¥770M ($5.0M)
2023-03-23	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.4M	¥975	-69.1%	¥2.3B ($14.9M)
2022-04-08	BUY	unknown	株式会社Fun&Creative Fun&Creative Co.,Ltd	strategic	20.5M	¥576	-47.7%	¥11.8B ($76.3M)
2022-04-08	BUY	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥576	-47.7%	¥964M ($6.2M)
2022-04-01	BUY	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥528	-43.0%	¥884M ($5.7M)
2022-04-01	SELL	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥528	+43.0%	¥2M ($13K)
2022-04-01	SELL	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥528	+43.0%	¥23M ($148K)
2022-04-01	SELL	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥528	+43.0%	¥21M ($135K)
2022-03-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.0M	¥465	-35.3%	¥461M ($3.0M)
2022-03-18	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥465	-35.3%	-
2022-03-18	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	264.8K	¥465	+35.3%	¥48M ($308K)
2022-03-18	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	24.7K	¥465	+35.3%	¥22M ($142K)
2022-01-27	SELL	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥656	+54.1%	¥57M ($367K)
2022-01-27	SELL	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥656	+54.1%	¥57M ($367K)
2022-01-27	SELL	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥656	+54.1%	¥778M ($5.0M)
2022-01-27	SELL	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥656	+54.1%	¥778M ($5.0M)
2021-12-09	BUY	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥1,128	-73.3%	¥1.9B ($12.2M)
2021-12-09	BUY	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥1,128	-73.3%	¥23.2B ($149.4M)
2021-12-08	SELL	unknown	山本正喜 Masaki Yamamoto	strategic	1.7M	¥1,079	+72.1%	¥16M ($104K)
2021-12-08	SELL	unknown	株式会社EC studioホールディングス EC studio Holdings ,Inc	strategic	20.5M	¥1,079	+72.1%	¥334M ($2.2M)
2021-07-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.6M	¥1,038	-71.0%	¥1.7B ($10.8M)
2021-07-06	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,038	-71.0%	-
2021-07-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	343.5K	¥1,038	-71.0%	¥357M ($2.3M)
2021-07-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	67.3K	¥1,038	-71.0%	¥70M ($451K)
2021-03-19	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.1M	¥1,313	+77.1%	¥262M ($1.7M)
2021-03-19	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	94.8K	¥1,313	-77.1%	¥68M ($438K)
2021-03-19	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,313	-77.1%	-
2021-03-19	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	271.5K	¥1,313	+77.1%	¥363M ($2.3M)

Frequently asked questions

Who has been buying kubell Co., Ltd. stock?: 7 distinct investors have filed 11 disclosed large-shareholding filings in kubell Co., Ltd. (4448), most recently on 2026-05-12. 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 kubell Co., Ltd. have?: kubell Co., Ltd. has 11 buy-side and 23 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2021-03-19 to 2026-05-12.
Where does StockDrifts get kubell 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 kubell Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.