Who has been buying Solasia Pharma K.K. stock?

5 distinct investors have filed 14 disclosed large-shareholding filings in Solasia Pharma K.K. (4597), most recently on 2026-01-16. 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 Solasia Pharma K.K. have?

Solasia Pharma K.K. has 14 buy-side and 51 sell-side disclosures on record, covering ¥2.4B ($15.2M) in total reported value, spanning 2021-03-26 to 2026-01-16.

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.

Solasia Pharma K.K. 4597

Company

ソレイジア・ファーマ株式会社Solasia Pharma K.K.

Investors

Buys

Total Value

¥2.4B ($15.2M)

Avg Return

-18.86%

Last Filing

2026-01-16

Solasia Pharma K.K. (4597) has 14 disclosed large-shareholding filings and 51 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.4B ($15.2M) in reported transaction value. The earliest filing StockDrifts holds for Solasia Pharma K.K. is dated 2021-03-26; the most recent is 2026-01-16. Across these filings the average return since disclosure is -18.86%, 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
2026-01-16	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	12.1M	¥31	+0.0%	¥139M ($899K)
2026-01-08	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	16.7M	¥29	-6.9%	¥96M ($622K)
2025-11-28	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	20.1M	¥34	+8.8%	¥99M ($636K)
2025-08-29	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	23.2M	¥37	+16.2%	¥118M ($764K)
2025-08-06	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	26.5M	¥41	+24.4%	¥198M ($1.3M)
2025-07-23	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	31.7M	¥42	+26.2%	¥107M ($691K)
2025-07-11	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	34.5M	¥41	+24.4%	¥110M ($712K)
2025-07-10	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	37.5M	¥44	+29.6%	¥150M ($965K)
2025-07-04	BUY	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	41.2M	¥37	-16.2%	¥115M ($744K)
2025-07-03	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	37.7M	¥36	+13.9%	¥189M ($1.2M)
2025-07-01	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	43.6M	¥35	+11.4%	¥107M ($690K)
2025-06-24	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	47.3M	¥32	+3.1%	¥74M ($480K)
2025-06-18	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	50.1M	¥32	+3.1%	¥76M ($487K)
2025-05-22	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	52.9M	¥31	+0.0%	¥71M ($461K)
2025-04-15	BUY	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	55.8M	¥34	-8.8%	¥1.9B ($12.2M)
2025-04-15	BUY	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	55.8M	¥34	-	¥1.9B ($12.2M)
2024-07-26	SELL	subscription	マッコーリーバンクリミテッド Macquarie Bank Limited	passive	6.4M	¥41	+24.4%	¥372M ($2.4M)
2024-07-12	SELL	subscription	マッコーリーバンクリミテッド Macquarie Bank Limited	passive	15.5M	¥29	-6.9%	¥98M ($630K)
2024-07-10	SELL	subscription	マッコーリーバンクリミテッド Macquarie Bank Limited	passive	19.1M	¥30	-3.3%	¥83M ($538K)
2024-07-01	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	22.1M	¥30	-3.3%	¥67M ($433K)
2024-06-04	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	24.5M	¥28	-10.7%	¥61M ($392K)
2024-05-31	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	26.9M	¥28	-10.7%	¥61M ($395K)
2024-04-26	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	29.3M	¥26	-19.2%	¥51M ($326K)
2024-04-22	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	31.5M	¥26	-19.2%	¥51M ($328K)
2024-04-15	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	33.7M	¥28	-10.7%	¥84M ($542K)
2024-04-09	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	37.2M	¥30	-3.3%	¥71M ($456K)
2024-04-01	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	40.0M	¥32	+3.1%	¥60M ($386K)
2024-03-27	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	42.2M	¥30	-3.3%	¥61M ($391K)
2024-03-15	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	44.7M	¥36	+13.9%	¥44M ($283K)
2024-03-08	BUY	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	46.2M	¥37	-16.2%	¥1.0B ($6.7M)
2024-01-12	BUY	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	9.3M	¥42	-26.2%	¥389M ($2.5M)
2024-01-04	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	8.3M	¥46	+32.6%	¥83M ($538K)
2023-12-15	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	10.2M	¥55	+43.6%	¥25M ($160K)
2023-02-03	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.6M	¥49	-36.7%	¥171M ($1.1M)
2023-02-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	607.0K	¥49	-36.7%	¥2M ($16K)
2023-01-10	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	10.4M	¥47	-34.0%	¥485M ($3.1M)
2023-01-10	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	553.1K	¥47	+34.0%	¥70M ($449K)
2023-01-04	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	10.6M	¥47	+34.0%	¥122M ($786K)
2022-12-22	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	11.3M	¥46	+32.6%	¥6M ($40K)
2022-12-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.0M	¥46	+32.6%	¥143M ($924K)
2022-11-30	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	11.5M	¥52	-40.4%	¥3M ($17K)
2022-11-30	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	5.2M	¥52	+40.4%	¥93M ($598K)
2022-11-22	BUY	negotiated	伊藤忠商事株式会社 ITOCHU Corporation	strategic	180.9K	¥54	-42.6%	¥1M ($7K)
2022-11-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	11.4M	¥54	-42.6%	¥616M ($4.0M)
2022-11-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	6.9M	¥54	-42.6%	¥375M ($2.4M)
2022-09-12	SELL	negotiated	伊藤忠商事株式会社 ITOCHU CORPORATION	strategic	16.6M	¥62	+50.0%	¥746M ($4.8M)
2022-09-06	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	12.5M	¥61	+49.2%	¥402M ($2.6M)
2022-08-23	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	20.3M	¥69	+55.1%	¥129M ($832K)
2022-08-19	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	22.3M	¥68	+54.4%	¥105M ($679K)
2022-07-15	BUY	unknown	日本化薬株式会社 NIPPON KAYAKU CO.,LTD.	other	12.0M	¥94	-67.0%	¥1.1B ($7.3M)

Showing the 50 most recent of 66 filings.

Frequently asked questions

Who has been buying Solasia Pharma K.K. stock?: 5 distinct investors have filed 14 disclosed large-shareholding filings in Solasia Pharma K.K. (4597), most recently on 2026-01-16. 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 Solasia Pharma K.K. have?: Solasia Pharma K.K. has 14 buy-side and 51 sell-side disclosures on record, covering ¥2.4B ($15.2M) in total reported value, spanning 2021-03-26 to 2026-01-16.
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.