Who has been buying Keihanshin Building Co., Ltd. stock?

6 distinct investors have filed 9 disclosed large-shareholding filings in Keihanshin Building Co., Ltd. (8818), most recently on 2026-04-30. 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 Keihanshin Building Co., Ltd. have?

Keihanshin Building Co., Ltd. has 9 buy-side and 2 sell-side disclosures on record, covering ¥1.5B ($9.8M) in total reported value, spanning 2024-02-15 to 2026-04-30.

Where does StockDrifts get Keihanshin Building 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.

Keihanshin Building Co., Ltd. 8818

Company

京阪神ビルディング株式会社Keihanshin Building Co., Ltd.

Investors

Buys

Total Value

¥1.5B ($9.8M)

Avg Return

+15.82%

Last Filing

2026-04-30

Keihanshin Building Co., Ltd. (8818) has 9 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.5B ($9.8M) in reported transaction value. The earliest filing StockDrifts holds for Keihanshin Building Co., Ltd. is dated 2024-02-15; the most recent is 2026-04-30. 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 +15.82%, 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
2026-08-03	SELL	acquisition	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	9.0M	¥1,106	+0.1%	¥292M ($1.9M)
2026-07-22	BUY	unknown	三井住友カード株式会社	other	1.5M	¥1,105	+0.0%	¥1.6B ($10.5M)
2026-07-22	BUY	unknown	株式会社三井住友銀行	other	4.3M	¥1,105	+0.0%	¥4.7B ($30.4M)
2026-07-22	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	193.2K	¥1,105	+0.0%	¥32M ($209K)
2026-07-22	BUY	Market Buy	SMBC日興証券株式会社	other	3.5M	¥1,105	+0.0%	¥1.4B ($8.8M)
2026-07-13	SELL	acquisition	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	9.2M	¥1,127	+6.2%	¥1.3B ($8.7M)
2026-06-02	SELL	acquisition	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	5.2M	¥2,196	+2.5%	¥1.4B ($9.2M)
2026-05-21	BUY	Market Buy	株式会社三井住友銀行	other	2.1M	¥2,205	-4.3%	¥43M ($278K)
2026-05-21	BUY	Market Buy	三井住友カード株式会社	other	737.0K	¥2,205	-4.3%	¥11M ($69K)
2026-05-21	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	112.9K	¥2,205	-4.3%	¥54M ($347K)
2026-05-21	BUY	Market Buy	SMBC日興証券株式会社	other	1.1M	¥2,205	-4.3%	¥2.1B ($13.5M)
2026-04-30	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	5.9M	¥1,892	+14.4%	¥1.3B ($8.6M)
2026-02-06	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	5.1M	¥2,007	-4.6%	¥235M ($1.5M)
2025-12-23	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	5.0M	¥1,892	+1.2%	¥933M ($6.0M)
2025-12-08	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	4.5M	¥1,904	+0.6%	¥939M ($6.1M)
2025-10-24	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	4.0M	¥1,743	+9.9%	¥970M ($6.3M)
2025-07-15	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	3.5M	¥1,498	+27.8%	¥855M ($5.5M)
2025-04-14	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	2.9M	¥1,429	+34.0%	¥614M ($4.0M)
2024-04-08	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	2.1M	¥1,540	+24.4%	¥182M ($1.2M)
2024-04-08	BUY	Market Buy	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	737.0K	¥1,540	+24.4%	¥1.1B ($7.3M)
2024-04-08	SELL	Market Buy	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	0	¥1,540	-24.4%	¥1.0B ($6.5M)
2024-04-08	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	90.7K	¥1,540	+24.4%	¥140M ($901K)
2024-04-08	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	156.2K	¥1,540	-24.4%	¥8M ($49K)
2024-02-15	BUY	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	2.5M	¥1,463	+30.9%	¥3.7B ($23.6M)

Frequently asked questions

Who has been buying Keihanshin Building Co., Ltd. stock?: 6 distinct investors have filed 9 disclosed large-shareholding filings in Keihanshin Building Co., Ltd. (8818), most recently on 2026-04-30. 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 Keihanshin Building Co., Ltd. have?: Keihanshin Building Co., Ltd. has 9 buy-side and 2 sell-side disclosures on record, covering ¥1.5B ($9.8M) in total reported value, spanning 2024-02-15 to 2026-04-30.
Where does StockDrifts get Keihanshin Building 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 Keihanshin Building Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.