Who has been buying Macromill, Inc. stock?

16 distinct investors have filed 38 disclosed large-shareholding filings in Macromill, Inc. (3978), most recently on 2025-04-08. 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 Macromill, Inc. have?

Macromill, Inc. has 38 buy-side and 31 sell-side disclosures on record, covering ¥80.5B ($519.1M) in total reported value, spanning 2021-04-28 to 2025-04-08.

Where does StockDrifts get Macromill, 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.

Macromill, Inc. 3978

Company

株式会社マクロミルMacromill, Inc.

Investors

Buys

Total Value

¥80.5B ($519.1M)

Avg Return

+27.78%

Last Filing

2025-04-08

Macromill, Inc. (3978) has 38 disclosed large-shareholding filings and 31 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥80.5B ($519.1M) in reported transaction value. The earliest filing StockDrifts holds for Macromill, Inc. is dated 2021-04-28; the most recent is 2025-04-08. 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 +27.78%, 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
2025-04-08	BUY	subscription	TJ1株式会社 TJ1 Co., Ltd.	activist	25.8M	¥1,286	-0.9%	¥33.2B ($214.0M)
2025-04-07	SELL	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	0	¥1,271	-0.2%	¥3.2B ($20.3M)
2025-04-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.2M	¥1,274	+0.0%	¥67M ($434K)
2025-04-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	109.2K	¥1,274	+0.0%	¥569M ($3.7M)
2025-04-04	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	25.7K	¥1,274	+0.0%	¥45.6B ($293.9M)
2025-03-26	SELL	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	0	¥1,274	+0.0%	¥6.0B ($38.9M)
2025-03-26	BUY	subscription	TJ1株式会社 TJ1 Co., Ltd.	activist	25.8M	¥1,274	+0.0%	¥32.9B ($212.0M)
2025-03-26	SELL	unknown	オアシスマネジメントカンパニーリミテッド (Oasis Management Company Ltd. ) Oasis Management Company Ltd.	other	0	¥1,274	+0.0%	¥4.2B ($27.1M)
2025-03-11	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	4.7M	¥1,271	+0.2%	¥238M ($1.5M)
2025-02-25	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド (Oasis Management Company Ltd. ) Oasis Management Company Ltd.	other	3.3M	¥1,247	+2.2%	¥497M ($3.2M)
2025-02-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	557.5K	¥1,272	+0.2%	¥709M ($4.6M)
2025-02-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.2M	¥1,272	+0.2%	¥1.5B ($9.6M)
2025-02-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	383.6K	¥1,272	+0.2%	¥488M ($3.1M)
2025-01-09	SELL	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	57	¥1,200	-6.2%	¥31M ($197K)
2025-01-09	BUY	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	304.1K	¥1,200	+6.2%	¥36.1B ($232.8M)
2025-01-08	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.2M	¥1,209	-5.4%	¥25M ($158K)
2025-01-08	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	326.5K	¥1,209	+5.4%	¥182M ($1.2M)
2025-01-08	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	119.6K	¥1,209	-5.4%	¥761M ($4.9M)
2024-12-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.2M	¥1,214	+4.9%	¥1.4B ($9.3M)
2024-12-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	172.9K	¥1,214	+4.9%	¥210M ($1.4M)
2024-12-19	BUY	Market Buy	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	2.5M	¥1,214	+4.9%	¥222M ($1.4M)
2024-12-19	SELL	Market Buy	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	5.1K	¥1,214	-4.9%	¥18.3B ($117.7M)
2024-12-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	749.4K	¥1,214	+4.9%	¥910M ($5.9M)
2024-12-17	BUY	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	2.9M	¥1,204	+5.8%	¥3.5B ($22.5M)
2024-12-05	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	2.4M	¥1,175	+8.4%	¥2.8B ($17.9M)
2024-12-05	BUY	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	154.5K	¥1,175	+8.4%	¥182M ($1.2M)
2024-12-04	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.2M	¥1,180	-8.0%	¥144M ($928K)
2024-12-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	128.9K	¥1,180	-8.0%	¥738M ($4.8M)
2024-12-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	574.0K	¥1,180	+8.0%	¥677M ($4.4M)
2024-10-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.3M	¥817	+55.9%	¥1.1B ($6.9M)
2024-10-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	752.4K	¥817	+55.9%	¥615M ($4.0M)
2024-09-20	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	621.4K	¥803	-58.7%	¥39M ($252K)
2024-09-20	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	1.2M	¥803	-58.7%	¥286M ($1.8M)
2024-08-08	SELL	Market Buy	ノルウェー銀行(Norges Bank) Norges Bank	passive	1.8M	¥772	-65.0%	¥231M ($1.5M)
2024-07-02	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	1.9M	¥828	-53.9%	¥496M ($3.2M)
2024-06-18	SELL	Market Buy	ノルウェー銀行(Norges Bank) Norges Bank	passive	2.1M	¥890	-43.1%	¥86M ($558K)
2024-04-04	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	672.9K	¥763	-67.0%	¥309M ($2.0M)
2024-04-04	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	1.6M	¥763	-67.0%	¥22M ($139K)
2024-03-22	SELL	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	2.5M	¥774	-64.6%	¥342M ($2.2M)
2024-03-06	SELL	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥712	-78.9%	¥288M ($1.9M)
2024-03-06	BUY	Market Buy	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	1.6M	¥712	+78.9%	¥55M ($353K)
2024-01-10	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	4.5M	¥817	+55.9%	¥357M ($2.3M)
2023-12-15	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	4.1M	¥784	+62.5%	¥368M ($2.4M)
2023-10-19	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	3.6M	¥678	+87.9%	¥307M ($2.0M)
2023-09-21	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	3.2M	¥763	+67.0%	¥315M ($2.0M)
2023-08-04	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.5M	¥748	-70.3%	¥188M ($1.2M)
2023-08-04	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	1.5M	¥748	-70.3%	¥70M ($449K)
2023-06-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.7M	¥855	-49.0%	¥35M ($223K)
2023-06-06	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	1.6M	¥855	-49.0%	¥55M ($357K)
2023-05-29	BUY	Market Buy	トライヴィスタ・キャピタル株式会社 TriVista Capital Inc.	activist	7.1M	¥886	+43.8%	¥395M ($2.5M)

Showing the 50 most recent of 73 filings.

Frequently asked questions

Who has been buying Macromill, Inc. stock?: 16 distinct investors have filed 38 disclosed large-shareholding filings in Macromill, Inc. (3978), most recently on 2025-04-08. 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 Macromill, Inc. have?: Macromill, Inc. has 38 buy-side and 31 sell-side disclosures on record, covering ¥80.5B ($519.1M) in total reported value, spanning 2021-04-28 to 2025-04-08.
Where does StockDrifts get Macromill, 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 Macromill, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.