Who has been buying CELSYS, Inc. stock?

14 distinct investors have filed 31 disclosed large-shareholding filings in CELSYS, Inc. (3663), most recently on 2025-10-30. 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 CELSYS, Inc. have?

CELSYS, Inc. has 31 buy-side and 9 sell-side disclosures on record, covering ¥12.5B ($80.9M) in total reported value, spanning 2021-10-29 to 2025-10-30.

Where does StockDrifts get CELSYS, 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.

CELSYS, Inc. 3663

Company

株式会社セルシスCELSYS, Inc.

Investors

Buys

Total Value

¥12.5B ($80.9M)

Avg Return

+65.92%

Last Filing

2025-10-30

CELSYS, Inc. (3663) has 31 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥12.5B ($80.9M) in reported transaction value. The earliest filing StockDrifts holds for CELSYS, Inc. is dated 2021-10-29; the most recent is 2025-10-30. 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 +65.92%, 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
2026-05-22	BUY	unknown	SMBC日興証券株式会社	other	48.8K	¥1,517	+16.0%	¥74M ($478K)
2026-05-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.7M	¥1,517	+16.0%	¥2.6B ($16.8M)
2025-10-30	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corporation	strategic	3.2M	¥1,610	-11.3%	¥193M ($1.2M)
2025-10-30	BUY	Market Buy	LINE Digital Frontier株式会社 LINE Digital Frontier Corporation	strategic	3.2M	¥1,610	-11.3%	¥193M ($1.2M)
2025-10-20	SELL	Market Buy	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	28.6K	¥1,652	+13.6%	¥90M ($580K)
2025-10-20	BUY	Market Buy	三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd.	other	50.8K	¥1,652	-13.6%	¥12M ($77K)
2025-10-20	SELL	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	487.6K	¥1,652	+13.6%	¥42M ($271K)
2025-10-20	SELL	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	889.4K	¥1,652	+13.6%	¥485M ($3.1M)
2025-07-07	BUY	Market Buy	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	82.6K	¥1,605	-11.0%	¥133M ($855K)
2025-07-07	BUY	Market Buy	三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd.	other	43.1K	¥1,605	-11.0%	¥69M ($446K)
2025-07-07	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	509.7K	¥1,605	-11.0%	¥818M ($5.3M)
2025-07-07	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.2M	¥1,605	-11.0%	¥1.9B ($12.2M)
2024-09-30	SELL	negotiated	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	0	¥1,187	-20.3%	¥1.6B ($10.1M)
2024-09-30	BUY	negotiated	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	0	¥1,187	+20.3%	¥3.6B ($23.3M)
2024-09-30	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corporation	strategic	3.2M	¥1,187	+20.3%	¥142M ($917K)
2024-09-30	BUY	Market Buy	LINE Digital Frontier株式会社 LINE Digital Frontier Corporation	strategic	3.2M	¥1,187	+20.3%	¥1.7B ($11.0M)
2023-12-08	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corp.	strategic	1.7M	¥706	+102.3%	¥1.2B ($7.8M)
2023-12-08	BUY	Market Buy	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	1.3M	¥706	+102.3%	¥259M ($1.7M)
2023-11-13	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corp.	strategic	1.7M	¥811	+76.1%	¥1.4B ($9.0M)
2023-11-13	BUY	Market Buy	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	953.6K	¥811	+76.1%	¥391M ($2.5M)
2023-10-30	BUY	Market Buy	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	472.5K	¥694	+105.8%	¥257M ($1.7M)
2023-10-30	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corp.	strategic	1.7M	¥694	+105.8%	¥1.2B ($7.7M)
2023-09-25	BUY	negotiated	株式会社イーブックイニシアティブジャパン eBOOK Initiative Japan CO.,LTD.	strategic	100.9K	¥704	+102.8%	¥71M ($458K)
2023-09-25	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corp.	strategic	1.7M	¥704	+102.8%	¥1.2B ($7.8M)
2023-09-25	BUY	negotiated	LINE Digital Frontier株式会社 LINE Digital Frontier Corp.	strategic	1.7M	¥704	+102.8%	¥1.2B ($7.8M)
2023-08-07	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント・インターナショナル Goldman Sachs Asset Management International	other	1.3M	¥672	+112.5%	¥7M ($47K)
2023-08-07	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント株式会社 Goldman Sachs Asset Management Co., Ltd.	other	74.4K	¥672	+112.5%	¥50M ($323K)
2023-08-07	SELL	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	0	¥672	-112.5%	¥256M ($1.7M)
2023-08-07	SELL	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	0	¥672	-112.5%	¥171M ($1.1M)
2023-08-07	BUY	unknown	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	246.8K	¥672	+112.5%	¥166M ($1.1M)
2023-07-07	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント・インターナショナル Goldman Sachs Asset Management International	other	1.3M	¥745	+91.7%	¥956M ($6.2M)
2023-07-07	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント株式会社 Goldman Sachs Asset Management Co., Ltd.	other	74.4K	¥745	+91.7%	¥55M ($358K)
2023-07-07	BUY	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	381.6K	¥745	+91.7%	¥284M ($1.8M)
2023-07-07	BUY	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	254.0K	¥745	+91.7%	¥189M ($1.2M)
2023-06-22	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント・インターナショナル Goldman Sachs Asset Management International	other	1.3M	¥756	+88.9%	¥69M ($442K)
2023-06-22	SELL	unknown	ゴールドマン・サックス・アセット・マネジメント株式会社 Goldman Sachs Asset Management Co., Ltd.	other	74.4K	¥756	-88.9%	¥38M ($248K)
2023-06-22	SELL	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	0	¥756	-88.9%	¥241M ($1.6M)
2023-06-22	BUY	unknown	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	102.6K	¥756	+88.9%	¥78M ($500K)
2023-06-22	SELL	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	0	¥756	-88.9%	¥181M ($1.2M)
2023-05-19	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント・インターナショナル Goldman Sachs Asset Management International	other	1.2M	¥809	+76.5%	¥955M ($6.2M)
2023-05-19	BUY	unknown	ゴールドマン・サックス・アセット・マネジメント株式会社 Goldman Sachs Asset Management Co., Ltd.	other	125.9K	¥809	+76.5%	¥102M ($657K)
2023-05-19	BUY	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	317.5K	¥809	+76.5%	¥257M ($1.7M)
2023-05-19	BUY	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	240.6K	¥809	+76.5%	¥195M ($1.3M)
2022-05-10	BUY	negotiated	株式会社ワコム Wacom Co., Ltd.	strategic	1.8M	¥805	+77.4%	¥1.5B ($9.4M)
2022-02-07	BUY	unknown	バークレイズ・バンク・ピーエルシー Barclays Bank PLC	other	9.4K	¥700	+104.0%	¥7M ($42K)
2022-02-07	BUY	unknown	バークレイズ・バンク・ピーエルシー Barclays Bank PLC	other	9.4K	¥700	+104.0%	¥695M ($4.5M)
2022-02-07	BUY	unknown	バークレイズ・キャピタル・セキュリティーズ・リミテッド Barclays Capital Securities Ltd.	other	1.3M	¥700	+104.0%	¥907M ($5.9M)
2022-02-07	BUY	unknown	バークレイズ・キャピタル・セキュリティーズ・リミテッド Barclays Capital Securities Ltd.	other	1.3M	¥700	+104.0%	¥907M ($5.8M)
2022-01-17	BUY	unknown	バークレイズ・バンク・ピーエルシー Barclays Bank PLC	other	1.2K	¥807	+77.0%	¥968K ($6K)
2022-01-17	BUY	unknown	バークレイズ・バンク・ピーエルシー Barclays Bank PLC	other	41.4K	¥807	+77.0%	¥33M ($216K)

Showing the 50 most recent of 55 filings.

Frequently asked questions

Who has been buying CELSYS, Inc. stock?: 14 distinct investors have filed 31 disclosed large-shareholding filings in CELSYS, Inc. (3663), most recently on 2025-10-30. 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 CELSYS, Inc. have?: CELSYS, Inc. has 31 buy-side and 9 sell-side disclosures on record, covering ¥12.5B ($80.9M) in total reported value, spanning 2021-10-29 to 2025-10-30.
Where does StockDrifts get CELSYS, 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 CELSYS, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.