Who has been buying Segue Group Co.,Ltd. stock?

7 distinct investors have filed 17 disclosed large-shareholding filings in Segue Group Co.,Ltd. (3968), most recently on 2026-03-23. 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 Segue Group Co.,Ltd. have?

Segue Group Co.,Ltd. has 17 buy-side and 16 sell-side disclosures on record, covering ¥1.4B ($9.3M) in total reported value, spanning 2021-06-22 to 2026-03-23.

Where does StockDrifts get Segue Group 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.

Segue Group Co.,Ltd. 3968

Company

セグエグループ株式会社Segue Group Co.,Ltd.

Investors

Buys

Total Value

¥1.4B ($9.3M)

Avg Return

+52.49%

Last Filing

2026-03-23

Segue Group Co.,Ltd. (3968) has 17 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.4B ($9.3M) in reported transaction value. The earliest filing StockDrifts holds for Segue Group Co.,Ltd. is dated 2021-06-22; the most recent is 2026-03-23. 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 +52.49%, 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
2026-03-23	BUY	unknown	みずほ信託銀行株式会社	other	456.4K	¥489	-8.6%	¥242M ($1.6M)
2026-03-23	SELL	unknown	みずほ証券株式会社	unknown	0	¥489	-8.6%	-
2026-02-20	BUY	unknown	みずほ信託銀行株式会社	other	458.5K	¥518	+2.5%	¥243M ($1.6M)
2026-02-20	BUY	unknown	みずほ証券株式会社	other	1.4M	¥518	+2.5%	¥751M ($4.8M)
2026-02-17	SELL	negotiated	有限会社エーディーシー	activist	2.8M	¥517	-2.7%	¥1.5B ($9.6M)
2026-02-17	SELL	negotiated	愛須康之	activist	9.7M	¥517	-2.7%	¥5.1B ($33.1M)
2026-02-17	SELL	negotiated	有限会社エーディーシー	activist	2.8M	¥517	-2.7%	¥1.5B ($9.6M)
2026-02-17	SELL	negotiated	愛須康之	activist	9.7M	¥517	-2.7%	¥5.1B ($33.1M)
2026-02-09	BUY	negotiated	有限会社エーディーシー	activist	2.8M	¥528	-0.6%	¥1.5B ($9.6M)
2026-02-09	BUY	negotiated	愛須康之	activist	10.3M	¥528	-0.6%	¥5.5B ($35.2M)
2026-02-09	BUY	negotiated	有限会社エーディーシー	activist	2.8M	¥528	-0.6%	¥1.5B ($9.6M)
2026-02-09	BUY	negotiated	愛須康之	activist	10.3M	¥528	-0.6%	¥5.5B ($35.2M)
2025-09-11	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥668	-20.5%	¥1.9B ($12.1M)
2025-09-11	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥668	-20.5%	¥1.9B ($12.1M)
2025-09-11	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥668	+20.5%	¥13M ($84K)
2025-09-11	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥668	+20.5%	¥13M ($84K)
2025-08-04	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥510	+4.1%	¥1.4B ($9.3M)
2025-08-04	BUY	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥510	+4.1%	¥5.3B ($33.9M)
2025-03-03	BUY	Market Buy	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥475	+11.8%	¥59M ($379K)
2025-03-03	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥475	+11.8%	¥59M ($379K)
2025-03-03	BUY	Market Buy	愛須康之 Yasuyuki Aisu	activist	10.3M	¥475	+11.8%	¥215M ($1.4M)
2025-03-03	BUY	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥475	+11.8%	¥215M ($1.4M)
2024-11-01	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥580	-8.4%	¥1.6B ($10.5M)
2024-11-01	BUY	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥580	-8.4%	¥6.0B ($38.5M)
2024-10-04	BUY	Market Buy	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥578	-8.1%	¥51M ($330K)
2024-10-04	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	2.8M	¥578	-8.1%	¥51M ($330K)
2024-10-04	BUY	Market Buy	愛須康之 Yasuyuki Aisu	activist	10.3M	¥578	-8.1%	¥183M ($1.2M)
2024-10-04	BUY	negotiated	愛須康之 Yasuyuki Aisu	activist	10.3M	¥578	-8.1%	¥183M ($1.2M)
2024-04-04	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	193.3K	¥498	+6.6%	¥87M ($562K)
2023-11-22	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	658.6K	¥304	+74.7%	¥200M ($1.3M)
2023-11-17	SELL	unknown	日商エレクトロニクス株式会社 NISSHO ELECTRONICS CORPORATION	other	376.0K	¥302.33	-75.6%	¥188M ($1.2M)
2023-11-08	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥320	+65.9%	¥300M ($1.9M)
2023-11-08	BUY	negotiated	愛須康之 Yasuyuki Aisu	activist	3.4M	¥320	+65.9%	¥1.1B ($7.1M)
2023-10-19	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥326.33	+62.7%	¥306M ($2.0M)
2023-10-19	BUY	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥326.33	+62.7%	¥306M ($2.0M)
2023-10-19	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	3.4M	¥326.33	-62.7%	¥10M ($67K)
2023-10-19	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	3.4M	¥326.33	-62.7%	¥10M ($67K)
2023-03-10	SELL	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥258.33	-105.5%	¥908K ($6K)
2023-03-10	SELL	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥258.33	-105.5%	¥908K ($6K)
2023-03-10	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	3.5M	¥258.33	-105.5%	¥30M ($193K)
2023-03-10	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	3.5M	¥258.33	-105.5%	¥30M ($193K)
2022-04-01	SELL	negotiated	有限会社エーディーシー ADC Co., Ltd.	activist	937.6K	¥210	-152.9%	¥3M ($19K)
2022-04-01	SELL	negotiated	愛須康之 Yasuyuki Aisu	activist	3.6M	¥210	-152.9%	¥22M ($139K)
2022-02-22	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	91.6K	¥177.67	+198.9%	¥3M ($21K)
2022-02-22	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	324.1K	¥177.67	+198.9%	¥57M ($365K)
2022-02-07	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	73.8K	¥193	+175.1%	¥8M ($54K)
2022-02-07	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	546.1K	¥193	+175.1%	¥104M ($670K)
2021-06-22	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	30.1K	¥370.33	+43.4%	¥11M ($72K)
2021-06-22	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	823.4K	¥370.33	+43.4%	¥301M ($1.9M)

Frequently asked questions

Who has been buying Segue Group Co.,Ltd. stock?: 7 distinct investors have filed 17 disclosed large-shareholding filings in Segue Group Co.,Ltd. (3968), most recently on 2026-03-23. 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 Segue Group Co.,Ltd. have?: Segue Group Co.,Ltd. has 17 buy-side and 16 sell-side disclosures on record, covering ¥1.4B ($9.3M) in total reported value, spanning 2021-06-22 to 2026-03-23.
Where does StockDrifts get Segue Group 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 Segue Group Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.