Who has been buying Nalnet Communications, Inc. stock?

5 distinct investors have filed 11 disclosed large-shareholding filings in Nalnet Communications, Inc. (5870), most recently on 2026-01-21. 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 Nalnet Communications, Inc. have?

Nalnet Communications, Inc. has 11 buy-side and 4 sell-side disclosures on record, covering ¥2.9B ($18.6M) in total reported value, spanning 2024-01-04 to 2026-01-21.

Where does StockDrifts get Nalnet Communications, 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.

Nalnet Communications, Inc. 5870

Company

株式会社ナルネットコミュニケーションズNalnet Communications, Inc.

Investors

Buys

Total Value

¥2.9B ($18.6M)

Avg Return

+9.66%

Last Filing

2026-01-21

Nalnet Communications, Inc. (5870) has 11 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.9B ($18.6M) in reported transaction value. The earliest filing StockDrifts holds for Nalnet Communications, Inc. is dated 2024-01-04; the most recent is 2026-01-21. 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 +9.66%, 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
2026-01-21	BUY	Market Buy	株式会社イエローハット YELLOW HAT LTD.	strategic	1.1M	¥1,051	-0.6%	¥34M ($217K)
2025-12-25	BUY	Market Buy	株式会社イエローハット YELLOW HAT LTD.	strategic	1.0M	¥1,174	-11.0%	¥66M ($424K)
2025-12-01	BUY	Market Buy	株式会社イエローハット YELLOW HAT LTD.	strategic	979.4K	¥1,039	+0.6%	¥58M ($375K)
2025-11-21	BUY	Market Buy	株式会社イエローハット YELLOW HAT LTD.	strategic	923.7K	¥1,053	-0.8%	¥60M ($388K)
2025-08-12	BUY	unknown	株式会社イエローハット YELLOW HAT LTD.	strategic	866.4K	¥734	+42.4%	¥636M ($4.1M)
2025-08-12	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	104	¥734	-42.4%	¥636M ($4.1M)
2025-06-25	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	866.5K	¥676	-54.6%	¥45M ($293K)
2025-05-13	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	933.8K	¥614	-70.2%	¥47M ($306K)
2024-02-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	6.9K	¥961	+8.7%	¥7M ($43K)
2024-02-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	44.3K	¥961	+8.7%	¥39M ($251K)
2024-01-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	6.9K	¥884	-18.2%	¥3M ($18K)
2024-01-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	370.8K	¥884	+18.2%	¥323M ($2.1M)
2024-01-11	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	482.3K	¥1,036	+0.9%	¥500M ($3.2M)
2024-01-11	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	10.0K	¥1,036	+0.9%	¥10M ($67K)
2024-01-05	BUY	unknown	Mobility&Maintenance Japan株式会社 Mobility&Maintenance Japan	other	1.9M	¥855	+22.2%	¥1.6B ($10.5M)
2024-01-04	BUY	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	1.0M	¥838	+24.7%	¥847M ($5.5M)

Frequently asked questions

Who has been buying Nalnet Communications, Inc. stock?: 5 distinct investors have filed 11 disclosed large-shareholding filings in Nalnet Communications, Inc. (5870), most recently on 2026-01-21. 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 Nalnet Communications, Inc. have?: Nalnet Communications, Inc. has 11 buy-side and 4 sell-side disclosures on record, covering ¥2.9B ($18.6M) in total reported value, spanning 2024-01-04 to 2026-01-21.
Where does StockDrifts get Nalnet Communications, 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 Nalnet Communications, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.