Who has been buying Tobila Systems Inc. stock?

7 distinct investors have filed 9 disclosed large-shareholding filings in Tobila Systems Inc. (4441), most recently on 2026-03-03. 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 Tobila Systems Inc. have?

Tobila Systems Inc. has 9 buy-side and 14 sell-side disclosures on record, covering ¥2.8B ($17.9M) in total reported value, spanning 2021-03-30 to 2026-03-03.

Where does StockDrifts get Tobila Systems 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.

Tobila Systems Inc. 4441

Company

トビラシステムズ株式会社Tobila Systems Inc.

Investors

Buys

Total Value

¥2.8B ($17.9M)

Avg Return

+30.68%

Last Filing

2026-03-03

Tobila Systems Inc. (4441) has 9 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥2.8B ($17.9M) in reported transaction value. The earliest filing StockDrifts holds for Tobila Systems Inc. is dated 2021-03-30; the most recent is 2026-03-03. 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 +30.68%, 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
2026-03-03	BUY	negotiated	明田篤 Atsushi Akita	activist	4.6M	¥1,393	+2.0%	¥165M ($1.1M)
2026-03-03	SELL	negotiated	明田篤 Atsushi Akita	activist	4.6M	¥1,393	-2.0%	¥165M ($1.1M)
2026-02-04	BUY	block_purchase	スモーク・キャピタル・マネジメント・エルエルシー(Smoak Capital Management, LLC) Smoak Capital Management, LLC	passive	781.6K	¥1,156	+22.9%	¥124M ($802K)
2025-12-17	BUY	Market Buy	メーガン・ティー・チーフ Meagan T Chieffe	passive	11.7K	¥1,234	-15.2%	¥17M ($107K)
2025-12-17	BUY	Market Buy	ダニエル・ブラッドリー・スモーク Daniel Bradley Smoak	passive	11.1K	¥1,234	-15.2%	¥16M ($102K)
2025-12-17	BUY	Market Buy	スモーク・キャピタル・マネジメント・エルエルシー(Smoak Capital Management	passive	650.9K	¥1,234	+15.2%	¥925M ($6.0M)
2025-12-17	BUY	Market Buy	メーガン・ティー・チーフ Meagan T Chieffe	passive	11.7K	¥1,234	-15.2%	¥17M ($107K)
2025-12-17	BUY	Market Buy	ダニエル・ブラッドリー・スモーク Daniel Bradley Smoak	passive	11.1K	¥1,234	-15.2%	¥16M ($102K)
2025-12-17	BUY	Market Buy	スモーク・キャピタル・マネジメント・エルエルシー(Smoak Capital Management	passive	650.9K	¥1,234	+15.2%	¥925M ($6.0M)
2025-12-02	BUY	Market Buy	メーガン・ティー・チーフ Meagan T Chieffe	passive	11.7K	¥1,019	+39.5%	¥17M ($107K)
2025-12-02	BUY	Market Buy	ダニエル・ブラッドリー・スモーク Daniel Bradley Smoak	passive	11.1K	¥1,019	+39.5%	¥16M ($102K)
2025-12-02	BUY	Market Buy	スモーク・キャピタル・マネジメント・エルエルシー(Smoak Capital Management	passive	511.4K	¥1,019	+39.5%	¥727M ($4.7M)
2025-05-01	SELL	negotiated	明田篤 Atsushi Akita	activist	4.7M	¥925	-53.6%	¥8M ($51K)
2023-12-13	SELL	negotiated	明田篤 Atsushi Akita	activist	4.7M	¥817	-73.9%	¥163M ($1.1M)
2023-11-30	SELL	negotiated	明田篤 Atsushi Akita	activist	4.9M	¥887	-60.2%	¥4M ($24K)
2022-07-29	SELL	negotiated	明田篤 Atsushi Akita	activist	4.9M	¥913	-55.6%	¥57M ($369K)
2022-07-29	BUY	negotiated	明田篤 Atsushi Akita	activist	4.9M	¥913	+55.6%	¥57M ($369K)
2022-02-14	SELL	negotiated	明田篤 Atsushi Akita	activist	4.9M	¥826	-72.0%	¥30M ($196K)
2022-02-10	SELL	negotiated	明田篤 Atsushi Akita	activist	4.9M	¥850	-67.2%	¥103M ($668K)
2021-11-26	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	485.2K	¥960	-48.0%	¥106M ($682K)
2021-11-19	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	57.0K	¥985	+44.3%	¥56M ($362K)
2021-11-19	BUY	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	246.8K	¥985	+44.3%	¥239M ($1.5M)
2021-11-18	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	595.7K	¥999	-42.2%	¥116M ($750K)
2021-11-12	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	711.7K	¥1,016	-39.9%	¥117M ($756K)
2021-11-05	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	56.5K	¥1,092	+30.1%	¥62M ($398K)
2021-11-05	BUY	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	494.1K	¥1,092	+30.1%	¥540M ($3.5M)
2021-11-02	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	826.6K	¥1,154	-23.1%	¥15M ($94K)
2021-10-29	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	839.6K	¥1,124	-26.4%	¥140M ($904K)
2021-10-22	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	917.9K	¥1,137	-25.0%	¥179M ($1.2M)
2021-10-22	BUY	negotiated	松下智樹 Tomoki Matsushita	activist	917.9K	¥1,137	+25.0%	¥179M ($1.2M)
2021-10-22	BUY	negotiated	松下智樹 Tomoki Matsushita	activist	964.1K	¥1,137	+25.0%	¥126M ($815K)
2021-03-30	SELL	negotiated	松下智樹 Tomoki Matsushita	activist	1.1M	¥1,420	-0.1%	¥150M ($969K)

Frequently asked questions

Who has been buying Tobila Systems Inc. stock?: 7 distinct investors have filed 9 disclosed large-shareholding filings in Tobila Systems Inc. (4441), most recently on 2026-03-03. 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 Tobila Systems Inc. have?: Tobila Systems Inc. has 9 buy-side and 14 sell-side disclosures on record, covering ¥2.8B ($17.9M) in total reported value, spanning 2021-03-30 to 2026-03-03.
Where does StockDrifts get Tobila Systems 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 Tobila Systems Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.