Who has been buying Nippon Air conditioning Services Co., Ltd. stock?

6 distinct investors have filed 12 disclosed large-shareholding filings in Nippon Air conditioning Services Co., Ltd. (4658), most recently on 2026-03-23. 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 Nippon Air conditioning Services Co., Ltd. have?

Nippon Air conditioning Services Co., Ltd. has 12 buy-side and 11 sell-side disclosures on record, covering ¥6.2B ($40.2M) in total reported value, spanning 2021-06-21 to 2026-03-23.

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.

Nippon Air conditioning Services Co., Ltd. 4658

Company

日本空調サービス株式会社Nippon Air conditioning Services Co., Ltd.

Investors

Buys

Total Value

¥6.2B ($40.2M)

Avg Return

+57.99%

Last Filing

2026-03-23

Nippon Air conditioning Services Co., Ltd. (4658) has 12 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥6.2B ($40.2M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Air conditioning Services Co., Ltd. is dated 2021-06-21; the most recent is 2026-03-23. Across these filings the average return since disclosure is +57.99%, 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
2026-09-07	BUY	Market Buy	SMBC日興証券株式会社	other	897.5K	¥1,597	+3.4%	¥1.3B ($8.5M)
2026-09-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.8M	¥1,597	+3.4%	¥46M ($295K)
2026-08-21	BUY	unknown	SMBC日興証券株式会社	other	73.7K	¥1,556	+6.1%	¥115M ($740K)
2026-08-21	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.7M	¥1,556	+6.1%	¥2.7B ($17.5M)
2026-03-23	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.5M	¥1,500	-10.1%	¥429M ($2.8M)
2026-03-23	SELL	Market Buy	SMBC日興証券株式会社	other	19.0K	¥1,500	-10.1%	¥86M ($554K)
2026-01-05	SELL	negotiated	三菱UFJ信託銀行株式会社	passive	364.0K	¥1,293	-27.7%	¥500M ($3.2M)
2026-01-05	SELL	negotiated	株式会社三菱UFJ銀行	strategic	534.2K	¥1,293	-27.7%	¥1.4B ($9.2M)
2026-01-05	BUY	negotiated	三菱UFJアセットマネジメント株式会社	passive	324.1K	¥1,293	+27.7%	¥9M ($60K)
2026-01-05	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社	other	123.3K	¥1,293	+27.7%	¥102M ($657K)
2025-10-22	SELL	unknown	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.8M	¥1,233	-33.9%	¥26M ($171K)
2025-10-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	76.0K	¥1,233	-33.9%	¥1.0B ($6.5M)
2025-09-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.8M	¥1,277	+29.3%	¥2.3B ($14.9M)
2025-09-05	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	892.3K	¥1,277	+29.3%	¥1.1B ($7.4M)
2025-06-30	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥1,124	-	-
2025-06-30	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	749.9K	¥1,124	-46.9%	¥897M ($5.8M)
2025-06-30	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	319.5K	¥1,124	+46.9%	¥72M ($467K)
2025-06-30	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	44.0K	¥1,124	-	¥49M ($319K)
2024-10-22	BUY	unknown	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.2M	¥1,015	+62.7%	¥40M ($258K)
2024-10-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	18.6K	¥1,015	-62.7%	¥1.1B ($7.0M)
2024-09-06	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	1.1M	¥1,054	+56.6%	¥1.1B ($7.4M)
2024-09-06	BUY	unknown	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.1M	¥1,054	+56.6%	¥1.2B ($7.8M)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.5M	¥1,007	-64.0%	¥72M ($465K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥1,007	-	-
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	253.2K	¥1,007	+64.0%	¥79M ($511K)
2021-10-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.4M	¥810	+103.8%	¥1.1B ($7.1M)
2021-10-22	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	16.8K	¥810	-103.8%	¥90M ($580K)
2021-09-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.7M	¥729	+126.5%	¥1.2B ($8.0M)
2021-09-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	127.9K	¥729	+126.5%	¥93M ($602K)
2021-06-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.8M	¥709	-132.9%	¥261M ($1.7M)

Frequently asked questions

Who has been buying Nippon Air conditioning Services Co., Ltd. stock?: 6 distinct investors have filed 12 disclosed large-shareholding filings in Nippon Air conditioning Services Co., Ltd. (4658), most recently on 2026-03-23. 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 Nippon Air conditioning Services Co., Ltd. have?: Nippon Air conditioning Services Co., Ltd. has 12 buy-side and 11 sell-side disclosures on record, covering ¥6.2B ($40.2M) in total reported value, spanning 2021-06-21 to 2026-03-23.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.