Who has been buying Property Data Bank, Inc. stock?

4 distinct investors have filed 10 disclosed large-shareholding filings in Property Data Bank, Inc. (4389), most recently on 2026-03-27. 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 Property Data Bank, Inc. have?

Property Data Bank, Inc. has 10 buy-side and 1 sell-side disclosures on record, covering ¥618M ($4.0M) in total reported value, spanning 2022-05-20 to 2026-03-27.

Where does StockDrifts get Property Data Bank, 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.

Property Data Bank, Inc. 4389

Company

プロパティデータバンク株式会社Property Data Bank, Inc.

Investors

Buys

Total Value

¥618M ($4.0M)

Avg Return

+5.14%

Last Filing

2026-03-27

Property Data Bank, Inc. (4389) has 10 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥618M ($4.0M) in reported transaction value. The earliest filing StockDrifts holds for Property Data Bank, Inc. is dated 2022-05-20; the most recent is 2026-03-27. 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 +5.14%, 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
2026-05-21	BUY	Market Buy	株式会社UH Partners 2	passive	815.9K	¥871	+2.1%	¥110M ($707K)
2026-05-21	BUY	Market Buy	光通信株式会社	passive	880.6K	¥871	+2.1%	¥767M ($4.9M)
2026-03-27	BUY	Market Buy	株式会社ケン・コーポレーション Ken Corporation Ltd	passive	1.5M	¥800	-0.1%	¥1.2B ($7.6M)
2026-03-27	SELL	Market Buy	株式会社ケン・コーポレーション Ken Corporation Ltd	passive	0	¥800	+0.1%	¥1.2B ($8.0M)
2026-03-27	BUY	Market Buy	株式会社ケン・コーポレーション Ken Corporation Ltd	passive	0	¥800	-0.1%	¥1.2B ($8.0M)
2026-03-27	BUY	Market Buy	株式会社ケン・コーポレーション Ken Corporation Ltd	passive	1.5M	¥800	-0.1%	¥1.2B ($7.6M)
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	690.1K	¥920	-13.2%	¥44M ($282K)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	880.6K	¥920	-13.2%	¥810M ($5.2M)
2025-06-17	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	321.7K	¥926.5	-13.8%	¥56M ($362K)
2025-06-17	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	440.3K	¥926.5	-13.8%	¥408M ($2.6M)
2025-04-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	261.3K	¥765	+4.4%	¥72M ($463K)
2025-04-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	440.3K	¥765	+4.4%	¥337M ($2.2M)
2025-02-03	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	167.2K	¥767.5	+4.1%	¥46M ($294K)
2025-02-03	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	440.3K	¥767.5	+4.1%	¥338M ($2.2M)
2024-11-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	107.7K	¥717.5	+11.4%	¥45M ($291K)
2024-11-18	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	440.3K	¥717.5	+11.4%	¥316M ($2.0M)
2024-08-20	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	44.9K	¥669	+19.4%	¥30M ($194K)
2024-08-20	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	440.3K	¥669	+19.4%	¥12M ($77K)
2024-07-04	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	422.1K	¥643.5	+24.2%	¥39M ($251K)
2024-06-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	362.0K	¥712	+12.2%	¥44M ($283K)
2024-05-23	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	300.3K	¥652	+22.6%	¥196M ($1.3M)
2023-08-17	BUY	Market Buy	ブイアイエス・アドバイザーズ・エルピー(VIS Advisors,LP) VIS Advisors,LP	passive	489.0K	¥926	-13.7%	¥55M ($354K)
2022-12-12	BUY	Market Buy	ブイアイエス・アドバイザーズ・エルピー(VIS Advisors,LP) VIS Advisors,LP	passive	429.3K	¥889.5	-10.2%	¥53M ($344K)
2022-09-20	BUY	Market Buy	ブイアイエス・アドバイザーズ・エルピー(VIS Advisors,LP) VIS Advisors,LP	passive	369.4K	¥951	-16.0%	¥60M ($389K)
2022-05-20	BUY	Market Buy	ブイアイエス・アドバイザーズ・エルピー(VIS Advisors,LP) VIS Advisors,LP	passive	306.0K	¥998.5	-20.0%	¥306M ($2.0M)

Frequently asked questions

Who has been buying Property Data Bank, Inc. stock?: 4 distinct investors have filed 10 disclosed large-shareholding filings in Property Data Bank, Inc. (4389), most recently on 2026-03-27. 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 Property Data Bank, Inc. have?: Property Data Bank, Inc. has 10 buy-side and 1 sell-side disclosures on record, covering ¥618M ($4.0M) in total reported value, spanning 2022-05-20 to 2026-03-27.
Where does StockDrifts get Property Data Bank, 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 Property Data Bank, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.