Who has been buying THE WHY HOW DO COMPANY, Inc. stock?

10 distinct investors have filed 17 disclosed large-shareholding filings in THE WHY HOW DO COMPANY, Inc. (3823), most recently on 2026-04-30. 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 THE WHY HOW DO COMPANY, Inc. have?

THE WHY HOW DO COMPANY, Inc. has 17 buy-side and 49 sell-side disclosures on record, covering ¥13.4B ($86.5M) in total reported value, spanning 2021-04-09 to 2026-04-30.

Where does StockDrifts get THE WHY HOW DO COMPANY, Inc. 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.

THE WHY HOW DO COMPANY, Inc. 3823

Company

株式会社アクロディアTHE WHY HOW DO COMPANY, Inc.

Investors

Buys

Total Value

¥13.4B ($86.5M)

Avg Return

-21.37%

Last Filing

2026-04-30

THE WHY HOW DO COMPANY, Inc. (3823) has 17 disclosed large-shareholding filings and 49 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥13.4B ($86.5M) in reported transaction value. The earliest filing StockDrifts holds for THE WHY HOW DO COMPANY, Inc. is dated 2021-04-09; the most recent is 2026-04-30. 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 -21.37%, 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
2026-06-12	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	7.7M	¥32	+3.1%	¥44M ($283K)
2026-05-28	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	9.2M	¥36	-22.2%	¥31M ($199K)
2026-05-28	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	9.2M	¥36	-22.2%	¥330M ($2.1M)
2026-05-22	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	10.1M	¥38	+18.4%	¥69M ($442K)
2026-04-30	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	11.9M	¥43	+16.3%	¥62M ($403K)
2026-04-28	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	13.4M	¥44	+18.2%	¥204M ($1.3M)
2026-04-21	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	18.4M	¥54	+29.6%	¥241M ($1.6M)
2026-04-17	BUY	Market Buy	株式会社機山 kizan	passive	8.0M	¥55	-30.9%	¥440M ($2.8M)
2026-04-15	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	23.0M	¥42	-9.5%	¥966M ($6.2M)
2026-04-03	SELL	unknown	田邊勝己 Tanabe katsuki	strategic	28.7M	¥46	+6.5%	¥10M ($62K)
2025-09-19	BUY	Market Buy	田邊勝己 Tanabe katsuki	strategic	33.0M	¥75	-25.3%	¥130M ($839K)
2025-09-19	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	29.0M	¥75	-25.3%	¥95M ($610K)
2025-07-24	SELL	unknown	田邊勝己 Tanabe katsuki	strategic	29.5M	¥85	+34.1%	¥777M ($5.0M)
2025-07-18	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	33.5M	¥87	-35.6%	¥729M ($4.7M)
2025-07-18	SELL	unknown	田邊勝己 Tanabe katsuki	strategic	33.5M	¥87	+35.6%	¥149M ($961K)
2025-04-25	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	36.5M	¥100	-44.0%	¥3.6B ($23.5M)
2025-04-25	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	36.5M	¥100	-44.0%	¥3.6B ($23.5M)
2025-04-25	BUY	Market Buy	田邊勝己 Tanabe katsuki	strategic	36.5M	¥100	-44.0%	¥263M ($1.7M)
2025-03-26	BUY	unknown	興和株式会社 Kowa Company, Ltd.	other	980.0K	¥123	-54.5%	¥10.9B ($70.4M)
2025-02-07	BUY	Market Buy	田邊勝己 Tanabe katsuki	strategic	36.5M	¥39	+43.6%	¥103M ($663K)
2025-02-07	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	36.5M	¥39	+43.6%	¥103M ($665K)
2025-02-07	SELL	unknown	田邊勝己 Tanabe katsuki	strategic	30.0M	¥39	-43.6%	¥43M ($279K)
2025-01-31	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥42	+33.3%	-
2025-01-31	SELL	Market Buy	エボファンド Evo Fund	activist	4.4M	¥42	-33.3%	¥66M ($426K)
2025-01-30	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥42	+33.3%	-
2025-01-30	SELL	Market Buy	エボファンド Evo Fund	activist	6.0M	¥42	-33.3%	¥77M ($496K)
2025-01-29	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥43	+30.2%	-
2025-01-29	SELL	Market Buy	エボファンド Evo Fund	activist	7.8M	¥43	-30.2%	¥81M ($520K)
2025-01-28	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥42	+33.3%	-
2025-01-28	SELL	Market Buy	エボファンド Evo Fund	activist	9.8M	¥42	-33.3%	¥144M ($926K)
2025-01-27	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥41	+36.6%	-
2025-01-27	SELL	Market Buy	エボファンド Evo Fund	activist	13.5M	¥41	-36.6%	¥70M ($453K)
2025-01-24	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥48	+16.7%	-
2025-01-24	SELL	Market Buy	エボファンド Evo Fund	activist	15.4M	¥48	-16.7%	¥136M ($880K)
2025-01-23	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥52	+7.7%	-
2025-01-23	SELL	Market Buy	エボファンド Evo Fund	activist	18.6M	¥52	-7.7%	¥134M ($864K)
2025-01-22	SELL	Market Buy	エボファンド Evo Fund	activist	21.7M	¥47	-19.1%	¥174M ($1.1M)
2025-01-22	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥47	+19.1%	-
2025-01-20	SELL	Market Buy	星山和彦 HOSHIYAMA KAZUHIKO	passive	0	¥45	-24.4%	¥314M ($2.0M)
2025-01-20	BUY	Market Buy	星山和彦 HOSHIYAMA KAZUHIKO	passive	0	¥45	+24.4%	¥314M ($2.0M)
2024-12-05	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥31	+80.7%	-
2024-12-05	SELL	Market Buy	エボファンド Evo Fund	activist	26.2M	¥31	-80.7%	¥36M ($229K)
2024-11-29	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥32	+75.0%	-
2024-11-29	SELL	Market Buy	エボファンド Evo Fund	activist	27.6M	¥32	-75.0%	¥44M ($282K)
2024-11-08	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥29	+93.1%	-
2024-11-08	SELL	Market Buy	エボファンド Evo Fund	activist	28.5M	¥29	-93.1%	¥3M ($22K)
2024-11-01	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	30.0M	¥30	+86.7%	¥33M ($215K)
2024-11-01	BUY	unknown	田邊勝己 Tanabe katsuki	strategic	30.0M	¥30	+86.7%	¥438M ($2.8M)
2024-11-01	SELL	unknown	田邊勝己 Tanabe katsuki	strategic	30.0M	¥30	-86.7%	¥10M ($62K)
2024-11-01	BUY	Market Buy	田邊勝己 Tanabe katsuki	strategic	30.0M	¥30	+86.7%	¥438M ($2.8M)

Showing the 50 most recent of 125 filings.

Frequently asked questions

Who has been buying THE WHY HOW DO COMPANY, Inc. stock?: 10 distinct investors have filed 17 disclosed large-shareholding filings in THE WHY HOW DO COMPANY, Inc. (3823), most recently on 2026-04-30. 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 THE WHY HOW DO COMPANY, Inc. have?: THE WHY HOW DO COMPANY, Inc. has 17 buy-side and 49 sell-side disclosures on record, covering ¥13.4B ($86.5M) in total reported value, spanning 2021-04-09 to 2026-04-30.
Where does StockDrifts get THE WHY HOW DO COMPANY, Inc. 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 THE WHY HOW DO COMPANY, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.