Who has been buying Saibu Gas Holdings Co.,Ltd. stock?

12 distinct investors have filed 12 disclosed large-shareholding filings in Saibu Gas Holdings Co.,Ltd. (9536), 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 Saibu Gas Holdings Co.,Ltd. have?

Saibu Gas Holdings Co.,Ltd. has 12 buy-side and 9 sell-side disclosures on record, covering ¥11.3B ($72.9M) in total reported value, spanning 2021-09-22 to 2026-03-23.

Where does StockDrifts get Saibu Gas Holdings Co.,Ltd. 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.

Saibu Gas Holdings Co.,Ltd. 9536

Company

西部ガスホールディングス株式会社Saibu Gas Holdings Co.,Ltd.

Investors

Buys

Total Value

¥11.3B ($72.9M)

Avg Return

+12.73%

Last Filing

2026-03-23

Saibu Gas Holdings Co.,Ltd. (9536) has 12 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥11.3B ($72.9M) in reported transaction value. The earliest filing StockDrifts holds for Saibu Gas Holdings Co.,Ltd. is dated 2021-09-22; the most recent is 2026-03-23. 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 +12.73%, 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
2026-03-23	BUY	unknown	株式会社三井住友銀行	other	874.4K	¥2,431	+4.3%	¥2.2B ($14.3M)
2026-03-23	BUY	unknown	SMBC日興証券株式会社	other	1.1M	¥2,431	+4.3%	¥2.8B ($17.9M)
2025-03-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	304.1K	¥1,714	-47.9%	¥6M ($41K)
2025-03-06	SELL	negotiated	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	669.5K	¥1,714	-47.9%	¥217M ($1.4M)
2025-03-06	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	382.0K	¥1,714	-47.9%	¥650M ($4.2M)
2024-07-04	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	308.4K	¥2,004	+26.5%	¥618M ($4.0M)
2024-07-04	BUY	negotiated	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	795.3K	¥2,004	+26.5%	¥1.6B ($10.3M)
2024-07-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	764.0K	¥2,004	+26.5%	¥1.5B ($9.9M)
2024-05-08	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	764.0K	¥1,954	-29.7%	¥167M ($1.1M)
2024-05-08	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	308.9K	¥1,954	-29.7%	¥29M ($188K)
2024-05-08	SELL	negotiated	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	735.2K	¥1,954	-29.7%	¥552M ($3.6M)
2023-10-02	BUY	negotiated	株式会社熊本銀行 Kumamoto Bank, Ltd.	strategic	149.2K	¥1,930	+31.4%	¥288M ($1.9M)
2023-10-02	BUY	negotiated	株式会社福岡中央銀行 Fukuoka Chuo Bank, Ltd.	strategic	451.1K	¥1,930	+31.4%	¥871M ($5.6M)
2023-10-02	BUY	negotiated	株式会社十八親和銀行 Eighteenth Shinwa Bank, Ltd.	strategic	1.2M	¥1,930	+31.4%	¥2.3B ($14.6M)
2023-10-02	BUY	negotiated	株式会社福岡銀行 THE BANK OF FUKUOKA, LTD.	strategic	1.8M	¥1,930	+31.4%	¥3.5B ($22.9M)
2022-07-25	SELL	Market Buy	日本生命保険相互会社 Nippon Life Insurance Company	passive	1.9M	¥1,847	-37.3%	¥687M ($4.4M)
2022-06-22	BUY	unknown	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	84.3K	¥1,773	+43.0%	¥149M ($964K)
2022-06-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	22.7K	¥1,773	-43.0%	¥40M ($255K)
2022-06-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.3M	¥1,773	+43.0%	¥2.3B ($14.9M)
2022-05-20	SELL	Market Buy	大樹生命保険株式会社 Taiki Life Insurance Co., Ltd.	passive	33.1K	¥1,941	-30.6%	¥22M ($140K)
2022-05-20	BUY	Market Buy	日本生命保険相互会社 Nippon Life Insurance Company	passive	2.3M	¥1,941	+30.6%	¥4.4B ($28.2M)
2021-09-24	BUY	unknown	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	84.3K	¥2,617	-3.1%	¥221M ($1.4M)
2021-09-24	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.7M	¥2,617	-3.1%	¥4.6B ($29.5M)
2021-09-24	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	43.9K	¥2,617	-3.1%	¥115M ($741K)
2021-09-22	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	322.4K	¥2,528	+0.3%	¥150M ($970K)
2021-09-22	BUY	negotiated	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	1.0M	¥2,528	+0.3%	¥658M ($4.2M)
2021-09-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	848.9K	¥2,528	+0.3%	¥2.1B ($13.8M)

Frequently asked questions

Who has been buying Saibu Gas Holdings Co.,Ltd. stock?: 12 distinct investors have filed 12 disclosed large-shareholding filings in Saibu Gas Holdings Co.,Ltd. (9536), 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 Saibu Gas Holdings Co.,Ltd. have?: Saibu Gas Holdings Co.,Ltd. has 12 buy-side and 9 sell-side disclosures on record, covering ¥11.3B ($72.9M) in total reported value, spanning 2021-09-22 to 2026-03-23.
Where does StockDrifts get Saibu Gas Holdings Co.,Ltd. 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 Saibu Gas Holdings Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.