Who has been buying Asahi Kasei Corporation stock?

32 distinct investors have filed 34 disclosed large-shareholding filings in Asahi Kasei Corporation (3407), most recently on 2026-03-19. 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 Asahi Kasei Corporation have?

Asahi Kasei Corporation has 34 buy-side and 39 sell-side disclosures on record, covering ¥111.3B ($718.2M) in total reported value, spanning 2021-09-24 to 2026-03-19.

Where does StockDrifts get Asahi Kasei Corporation 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.

Asahi Kasei Corporation 3407

Company

旭化成株式会社Asahi Kasei Corporation

Investors

Buys

Total Value

¥111.3B ($718.2M)

Avg Return

+48.27%

Last Filing

2026-03-19

Asahi Kasei Corporation (3407) has 34 disclosed large-shareholding filings and 39 disclosed disposals on record, filed by 32 distinct investors. Together those filings cover ¥111.3B ($718.2M) in reported transaction value. The earliest filing StockDrifts holds for Asahi Kasei Corporation is dated 2021-09-24; the most recent is 2026-03-19. 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 +48.27%, 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
2026-03-19	BUY	unknown	野村アセットマネジメント株式会社	other	66.7M	¥1,553.5	+0.4%	¥104.1B ($671.3M)
2026-03-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.6M	¥1,553.5	+0.4%	¥2.5B ($16.1M)
2025-10-03	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	2.2M	¥1,162	-34.2%	¥476M ($3.1M)
2025-10-03	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	17.6M	¥1,162	-34.2%	¥3.5B ($22.5M)
2025-10-03	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	26.7M	¥1,162	+34.2%	¥317M ($2.0M)
2025-10-03	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	11.0M	¥1,162	+34.2%	¥635M ($4.1M)
2025-10-03	SELL	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	2.3M	¥1,162	-34.2%	¥1.3B ($8.2M)
2025-10-03	SELL	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	4.8M	¥1,162	-34.2%	¥952M ($6.1M)
2025-10-03	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	4.5M	¥1,162	-34.2%	¥2.4B ($15.4M)
2025-10-03	SELL	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	1.4M	¥1,162	-34.2%	¥2.5B ($16.4M)
2025-10-03	SELL	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	3.3M	¥1,162	-34.2%	¥952M ($6.1M)
2025-10-03	BUY	Market Buy	ブラックロック・アドバイザーズ・エルエルシー(BlackRock Advisers BlackRock Advisers, LLC	passive	2.0M	¥1,162	+34.2%	¥159M ($1.0M)
2025-10-03	SELL	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	24.5M	¥1,162	-34.2%	¥5.4B ($34.8M)
2025-09-19	BUY	unknown	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	24.5M	¥1,187	+31.3%	¥29.1B ($187.9M)
2025-09-19	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	44.4M	¥1,187	-31.3%	¥1.3B ($8.4M)
2025-01-10	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	19.8M	¥1,064	-46.5%	¥2.5B ($16.3M)
2025-01-10	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	37.4M	¥1,064	-46.5%	¥1.0B ($6.7M)
2025-01-10	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	5.2M	¥1,064	-46.5%	¥4.3B ($27.7M)
2025-01-09	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	25.1M	¥1,072.5	-45.4%	¥2.5B ($16.4M)
2025-01-09	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	46.4M	¥1,072.5	-45.4%	¥6.7B ($43.4M)
2025-01-09	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	unknown	0	¥1,072.5	-45.4%	¥1.3T ($8.7B)
2024-10-18	BUY	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	2.6M	¥1,048	+48.8%	¥877M ($5.7M)
2024-10-18	BUY	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	21.0M	¥1,048	+48.8%	¥3.7B ($23.6M)
2024-10-18	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	26.9M	¥1,048	+48.8%	¥877M ($5.7M)
2024-10-18	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	10.7M	¥1,048	+48.8%	¥146M ($942K)
2024-10-18	BUY	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	3.5M	¥1,048	+48.8%	¥146M ($942K)
2024-10-18	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	5.7M	¥1,048	+48.8%	¥6.0B ($38.5M)
2024-10-18	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	6.7M	¥1,048	+48.8%	¥4.2B ($27.3M)
2024-10-18	BUY	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	3.6M	¥1,048	+48.8%	¥2.3B ($15.1M)
2024-10-18	BUY	Market Buy	ブラックロック・インベストメント・マネジメント・エルエルシー BlackRock Investment Management LLC	passive	1.1M	¥1,048	+48.8%	¥115.4B ($744.6M)
2024-10-18	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	4.1M	¥1,048	+48.8%	¥4.3B ($27.8M)
2024-10-18	BUY	Market Buy	ブラックロック・アドバイザーズ・エルエルシー(BlackRock Advisers BlackRock Advisers, LLC	passive	1.8M	¥1,048	+48.8%	¥1.9B ($12.1M)
2024-10-18	SELL	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	1.2M	¥1,048	-48.8%	¥730M ($4.7M)
2024-10-18	SELL	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	29.6M	¥1,048	-48.8%	¥292M ($1.9M)
2024-08-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	38.3M	¥954.5	+63.3%	¥36.6B ($235.9M)
2024-08-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	9.2M	¥954.5	+63.3%	¥8.8B ($56.9M)
2024-08-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	22.2M	¥954.5	+63.3%	¥21.2B ($136.7M)
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	33.1M	¥1,132.5	-37.7%	¥7.6B ($48.9M)
2024-05-09	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	2.1M	¥1,132.5	+37.7%	¥158M ($1.0M)
2024-05-09	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	22.2M	¥1,132.5	-37.7%	¥9.0B ($58.1M)
2023-11-06	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	26.1M	¥953.7	+63.5%	¥4.7B ($30.0M)
2023-11-06	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	5.7M	¥953.7	+63.5%	¥2.1B ($13.7M)
2023-11-06	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	1.8M	¥953.7	-63.5%	¥665M ($4.3M)
2023-11-06	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	17.6M	¥953.7	-63.5%	¥3.2B ($20.6M)
2023-11-06	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	10.6M	¥953.7	+63.5%	¥798M ($5.1M)
2023-11-06	BUY	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	3.3M	¥953.7	+63.5%	¥3.1B ($20.3M)
2023-11-06	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	2.6M	¥953.7	-63.5%	¥1.3B ($8.6M)
2023-11-06	BUY	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	1.4M	¥953.7	+63.5%	¥1.4B ($8.8M)
2023-11-06	BUY	Market Buy	ブラックロック・インベストメント・マネジメント・エルエルシー BlackRock Investment Management LLC	passive	1.4M	¥953.7	+63.5%	¥1.4B ($8.7M)
2023-11-06	SELL	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	1.2M	¥953.7	-63.5%	¥266M ($1.7M)

Showing the 50 most recent of 87 filings.

Frequently asked questions

Who has been buying Asahi Kasei Corporation stock?: 32 distinct investors have filed 34 disclosed large-shareholding filings in Asahi Kasei Corporation (3407), most recently on 2026-03-19. 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 Asahi Kasei Corporation have?: Asahi Kasei Corporation has 34 buy-side and 39 sell-side disclosures on record, covering ¥111.3B ($718.2M) in total reported value, spanning 2021-09-24 to 2026-03-19.
Where does StockDrifts get Asahi Kasei Corporation 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 Asahi Kasei Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.