Who has been buying Ubicom Holdings, Inc. stock?

7 distinct investors have filed 18 disclosed large-shareholding filings in Ubicom Holdings, Inc. (3937), most recently on 2026-04-07. 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 Ubicom Holdings, Inc. have?

Ubicom Holdings, Inc. has 18 buy-side and 26 sell-side disclosures on record, covering ¥6.7B ($43.4M) in total reported value, spanning 2021-04-20 to 2026-04-07.

Where does StockDrifts get Ubicom Holdings, 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.

Ubicom Holdings, Inc. 3937

Company

株式会社UBICOMホールディングスUbicom Holdings, Inc.

Investors

Buys

Total Value

¥6.7B ($43.4M)

Avg Return

-52.60%

Last Filing

2026-04-07

Ubicom Holdings, Inc. (3937) has 18 disclosed large-shareholding filings and 26 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥6.7B ($43.4M) in reported transaction value. The earliest filing StockDrifts holds for Ubicom Holdings, Inc. is dated 2021-04-20; the most recent is 2026-04-07. 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 -52.60%, 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
2026-04-07	BUY	unknown	株式会社UH6	passive	853.7K	¥972	-3.3%	¥830M ($5.4M)
2026-04-07	SELL	unknown	光通信株式会社	unknown	0	¥972	+3.3%	¥767M ($4.9M)
2026-02-18	BUY	unknown	青木正之 Masayuki Aoki	activist	5.0M	¥961	+3.0%	¥4.8B ($30.9M)
2025-11-28	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	789.3K	¥1,088	-9.0%	¥135M ($868K)
2025-11-14	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	664.8K	¥1,073	-7.7%	¥713M ($4.6M)
2025-07-11	BUY	unknown	青木正之 Masayuki Aoki	activist	5.0M	¥983	+0.7%	¥4.9B ($31.6M)
2025-06-20	SELL	unknown	青木正之 Masayuki Aoki	activist	5.0M	¥942	-5.1%	¥13M ($82K)
2025-03-31	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	487.5K	¥1,280	-22.7%	¥166M ($1.1M)
2025-03-31	SELL	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	487.5K	¥1,280	+22.7%	¥166M ($1.1M)
2025-02-13	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	616.8K	¥1,463	-32.3%	¥902M ($5.8M)
2025-02-13	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	616.8K	¥1,463	-32.3%	¥902M ($5.8M)
2025-02-13	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	616.8K	¥1,463	-32.3%	¥902M ($5.8M)
2025-02-13	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	616.8K	¥1,463	-32.3%	¥902M ($5.8M)
2024-05-15	SELL	subscription	青木正之 Masayuki Aoki	activist	5.0M	¥1,268	+21.9%	¥50M ($320K)
2023-11-13	BUY	subscription	青木正之 Masayuki Aoki	activist	5.0M	¥1,606	-38.4%	¥168M ($1.1M)
2023-11-01	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,165	-15.0%	¥5.6B ($36.1M)
2023-10-04	SELL	Market Buy	アーチザン・インベストメンツ・ジーピー・エルエルシー(Artisan Investments GP LLC) Artisan Investments GP LLC	passive	566.6K	¥1,247	+20.6%	¥433M ($2.8M)
2023-09-06	SELL	Market Buy	アーチザン・インベストメンツ・ジーピー・エルエルシー(Artisan Investments GP LLC) Artisan Investments GP LLC	passive	912.8K	¥1,373	+27.9%	¥326M ($2.1M)
2023-08-30	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,265	+21.7%	¥25M ($164K)
2023-08-30	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,265	+21.7%	¥2M ($10K)
2023-08-30	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,265	-21.7%	¥6.1B ($39.2M)
2023-08-30	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,265	+21.7%	¥6M ($39K)
2023-08-17	SELL	Market Buy	アーチザン・インベストメンツ・ジーピー・エルエルシー(Artisan Investments GP LLC) Artisan Investments GP LLC	passive	1.2M	¥1,322	+25.1%	¥165M ($1.1M)
2023-06-14	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,742	+43.2%	¥6M ($40K)
2023-06-14	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,742	-43.2%	¥6M ($40K)
2023-04-06	SELL	Market Buy	アーチザン・インベストメンツ・ジーピー・エルエルシー(Artisan Investments GP LLC) Artisan Investments GP LLC	passive	1.3M	¥2,178	+54.5%	¥277M ($1.8M)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥9.2B ($59.4M)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥9.2B ($59.6M)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥59M ($381K)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥9.2B ($59.4M)
2023-02-24	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	+48.3%	¥39M ($248K)
2023-02-24	SELL	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	+48.3%	¥59M ($381K)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥9.2B ($59.4M)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥59M ($381K)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥59M ($381K)
2023-02-24	BUY	subscription	青木正之 Masayuki Aoki	activist	4.8M	¥1,914	-48.3%	¥9.2B ($59.4M)
2022-09-06	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	474.3K	¥2,604	+62.0%	¥364M ($2.4M)
2022-07-21	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	612.8K	¥2,744	-63.9%	¥36M ($230K)
2022-07-07	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	600.5K	¥2,571	+61.5%	¥97M ($628K)
2022-05-19	SELL	Market Buy	UBS証券株式会社 UBS Securities Co., Ltd.	other	10.0K	¥2,726	+63.7%	¥1.5B ($9.5M)
2022-05-19	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	637.7K	¥2,726	-63.7%	¥1.5B ($9.9M)
2022-04-22	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	549.2K	¥2,809	-64.8%	¥1.5B ($10.0M)
2022-04-22	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	73.6K	¥2,809	+64.8%	¥33M ($214K)
2022-04-06	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	549.2K	¥2,757	-64.1%	¥1.5B ($9.8M)
2022-04-06	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	85.1K	¥2,757	+64.1%	¥486M ($3.1M)
2022-03-22	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	549.2K	¥2,340	-57.7%	¥1.3B ($8.3M)
2022-03-22	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	261.0K	¥2,340	+57.7%	¥778M ($5.0M)
2022-03-07	SELL	Market Buy	UBS証券株式会社 UBS Securities Co., Ltd.	other	549.4K	¥2,220	+55.4%	¥29M ($186K)
2022-03-07	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	594.6K	¥2,220	-55.4%	¥1.2B ($8.0M)
2022-02-22	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	562.0K	¥1,997	-50.4%	¥1.1B ($7.2M)

Showing the 50 most recent of 67 filings.

Frequently asked questions

Who has been buying Ubicom Holdings, Inc. stock?: 7 distinct investors have filed 18 disclosed large-shareholding filings in Ubicom Holdings, Inc. (3937), most recently on 2026-04-07. 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 Ubicom Holdings, Inc. have?: Ubicom Holdings, Inc. has 18 buy-side and 26 sell-side disclosures on record, covering ¥6.7B ($43.4M) in total reported value, spanning 2021-04-20 to 2026-04-07.
Where does StockDrifts get Ubicom Holdings, 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 Ubicom Holdings, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.