Who has been buying OLBA HEALTHCARE HOLDINGS, Inc. stock?

7 distinct investors have filed 8 disclosed large-shareholding filings in OLBA HEALTHCARE HOLDINGS, Inc. (2689), most recently on 2026-01-13. 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 OLBA HEALTHCARE HOLDINGS, Inc. have?

OLBA HEALTHCARE HOLDINGS, Inc. has 8 buy-side and 6 sell-side disclosures on record, covering ¥3.0B ($19.4M) in total reported value, spanning 2021-04-12 to 2026-01-13.

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.

OLBA HEALTHCARE HOLDINGS, Inc. 2689

Company

オルバヘルスケアホールディングス株式会社OLBA HEALTHCARE HOLDINGS, Inc.

Investors

Buys

Total Value

¥3.0B ($19.4M)

Avg Return

+10.14%

Last Filing

2026-01-13

OLBA HEALTHCARE HOLDINGS, Inc. (2689) has 8 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥3.0B ($19.4M) in reported transaction value. The earliest filing StockDrifts holds for OLBA HEALTHCARE HOLDINGS, Inc. is dated 2021-04-12; the most recent is 2026-01-13. Across these filings the average return since disclosure is +10.14%, 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
2026-09-08	BUY	Market Buy	株式会社UH6	passive	406.1K	¥1,932	-0.4%	¥784M ($5.1M)
2026-09-08	BUY	Market Buy	株式会社UH Partners 2	passive	384.6K	¥1,932	-0.4%	¥743M ($4.8M)
2026-09-08	BUY	Market Buy	光通信株式会社	passive	211.0K	¥1,932	-0.4%	¥408M ($2.6M)
2026-09-04	BUY	unknown	宮川猛	strategic	18.9K	¥1,946	-1.1%	¥37M ($237K)
2026-09-04	BUY	unknown	株式会社MSS	strategic	1.8M	¥1,946	-1.1%	¥3.4B ($22.2M)
2026-09-04	BUY	unknown	株式会社MSS MSS Co.,Ltd.	strategic	1.8M	¥1,946	-1.1%	¥3.4B ($22.2M)
2026-01-13	BUY	unknown	株式会社マスプ	other	859.6K	¥2,094	-	-
2026-01-13	BUY	unknown	有限会社カタパルト	other	80.0K	¥2,094	-	-
2026-01-13	BUY	unknown	前島洋平	other	107.0K	¥2,094	-	-
2026-01-08	BUY	unknown	株式会社マスプ	other	859.6K	¥2,070	-7.0%	¥41M ($267K)
2026-01-08	SELL	unknown	前島洋平	other	107.0K	¥2,070	+7.0%	¥104M ($668K)
2026-01-08	BUY	unknown	有限会社カタパルト	other	80.0K	¥2,070	-	-
2025-07-18	BUY	Market Buy	前島達也 Maeshima Tatsuya	passive	486.5K	¥2,058	-	¥1.0B ($6.5M)
2025-07-18	BUY	Market Buy	前島達也 Maeshima Tatsuya	passive	486.5K	¥2,058	-6.5%	¥1.0B ($6.5M)
2025-05-02	SELL	unknown	前島洋平 Yohei Maejima	other	137.0K	¥2,113	+8.9%	¥42M ($273K)
2025-05-02	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	859.6K	¥2,113	-8.9%	¥42M ($273K)
2025-05-02	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	859.6K	¥2,113	-8.9%	¥42M ($273K)
2025-05-02	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥2,113	-	-
2025-05-02	SELL	unknown	前島洋平 Yohei Maejima	other	137.0K	¥2,113	+8.9%	¥42M ($273K)
2025-05-02	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥2,113	-	-
2023-10-10	BUY	Market Buy	株式会社マスプ MASP Co., Ltd	other	839.6K	¥1,820	+5.8%	¥55M ($352K)
2023-10-10	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	839.6K	¥1,820	+5.8%	¥55M ($352K)
2023-10-10	BUY	Market Buy	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,820	-	-
2023-10-10	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,820	-	-
2023-10-10	SELL	unknown	前島洋平 Yohei Maejima	other	157.0K	¥1,820	-5.8%	¥55M ($352K)
2023-10-10	SELL	Market Buy	前島洋平 Yohei Maejima	other	157.0K	¥1,820	-5.8%	¥55M ($352K)
2022-12-22	BUY	unknown	前島洋平 Yohei Maejima	other	187.0K	¥1,530	-	-
2022-12-22	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	809.6K	¥1,530	-	-
2022-12-22	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,530	-	-
2022-05-19	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	120.0K	¥1,722	-11.8%	¥138M ($889K)
2022-05-19	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	79.0K	¥1,722	+11.8%	¥16M ($104K)
2022-05-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	47.6K	¥1,722	+11.8%	¥4M ($28K)
2021-07-05	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	809.6K	¥1,662	-	-
2021-07-05	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	809.6K	¥1,662	-	-
2021-07-05	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,662	-	-
2021-07-05	BUY	unknown	前島洋平 Yohei Maejima	other	187.0K	¥1,662	-	-
2021-07-05	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,662	-	-
2021-07-05	BUY	unknown	前島洋平 Yohei Maejima	other	187.0K	¥1,662	-	-
2021-04-16	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	809.6K	¥1,716	-	-
2021-04-16	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,716	-	-
2021-04-16	BUY	unknown	前島洋平 Yohei Maejima	other	187.0K	¥1,716	-	-
2021-04-12	BUY	unknown	株式会社マスプ MASP Co., Ltd	other	809.6K	¥1,677	-	-
2021-04-12	BUY	unknown	有限会社カタパルト Catapult Ltd.	other	80.0K	¥1,677	-	-
2021-04-12	BUY	unknown	前島洋平 Yohei Maejima	other	187.0K	¥1,677	-	-

Frequently asked questions

Who has been buying OLBA HEALTHCARE HOLDINGS, Inc. stock?: 7 distinct investors have filed 8 disclosed large-shareholding filings in OLBA HEALTHCARE HOLDINGS, Inc. (2689), most recently on 2026-01-13. 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 OLBA HEALTHCARE HOLDINGS, Inc. have?: OLBA HEALTHCARE HOLDINGS, Inc. has 8 buy-side and 6 sell-side disclosures on record, covering ¥3.0B ($19.4M) in total reported value, spanning 2021-04-12 to 2026-01-13.
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.