Who has been buying Saison Technology Co., Ltd. stock?

4 distinct investors have filed 5 disclosed large-shareholding filings in Saison Technology Co., Ltd. (9640), most recently on 2025-08-01. 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 Saison Technology Co., Ltd. have?

Saison Technology Co., Ltd. has 5 buy-side and 3 sell-side disclosures on record, covering ¥13.4B ($86.2M) in total reported value, spanning 2021-11-08 to 2025-08-01.

Where does StockDrifts get Saison Technology 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.

Saison Technology Co., Ltd. 9640

Company

株式会社セゾン情報システムズSaison Technology Co., Ltd.

Investors

Buys

Total Value

¥13.4B ($86.2M)

Avg Return

+19.20%

Last Filing

2025-08-01

Saison Technology Co., Ltd. (9640) has 5 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥13.4B ($86.2M) in reported transaction value. The earliest filing StockDrifts holds for Saison Technology Co., Ltd. is dated 2021-11-08; the most recent is 2025-08-01. 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 +19.20%, 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
2025-08-01	BUY	Market Buy	株式会社バッファロー Buffalo Co.,Ltd.	unknown	81.0K	¥1,927	+23.0%	¥156M ($1.0M)
2025-08-01	BUY	Market Buy	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	passive	1.2M	¥1,927	+23.0%	¥2.3B ($14.5M)
2024-09-05	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,808	+31.1%	¥2.1B ($13.6M)
2024-09-05	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,808	+31.1%	¥5.9B ($37.8M)
2024-09-04	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,803	+31.4%	¥2.1B ($13.6M)
2024-09-04	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,803	+31.4%	¥2.1B ($13.6M)
2024-09-04	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,803	+31.4%	¥5.8B ($37.7M)
2024-09-04	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,803	+31.4%	¥5.8B ($37.7M)
2024-07-31	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,964	+20.7%	¥2.3B ($14.8M)
2024-07-31	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,964	+20.7%	¥2.3B ($14.8M)
2024-07-31	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,964	+20.7%	¥6.4B ($41.1M)
2024-07-31	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,964	+20.7%	¥6.4B ($41.1M)
2024-06-03	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,840	+28.8%	¥2.1B ($13.9M)
2024-06-03	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥1,840	+28.8%	¥2.1B ($13.9M)
2024-06-03	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,840	+28.8%	¥6.0B ($38.5M)
2024-06-03	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥1,840	+28.8%	¥6.0B ($38.5M)
2024-03-26	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥2,002	+18.4%	¥2.3B ($15.1M)
2024-03-26	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥2,002	+18.4%	¥2.3B ($15.1M)
2024-03-26	BUY	Market Buy	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	passive	1.2M	¥2,002	+18.4%	¥2.3B ($15.1M)
2024-03-26	SELL	negotiated	株式会社メルコホールディングス MELCO HOLDINGS INC.	activist	81.0K	¥2,002	-18.4%	¥8.8B ($56.9M)
2024-03-26	SELL	negotiated	株式会社メルコホールディングス MELCO HOLDINGS INC.	activist	81.0K	¥2,002	-18.4%	¥8.8B ($56.9M)
2024-03-26	BUY	Market Buy	株式会社メルコホールディングス MELCO HOLDINGS INC.	unknown	81.0K	¥2,002	+18.4%	¥8.8B ($56.9M)
2024-03-26	BUY	negotiated	エスティーエムヘリテージピーティーイーエルティーディー STM HERITAGE PTE. LTD.	unknown	1.2M	¥2,002	+18.4%	¥2.3B ($15.1M)
2024-03-26	BUY	negotiated	株式会社メルコグループ MELCO Inc.	activist	3.2M	¥2,002	+18.4%	¥6.5B ($41.8M)
2021-11-24	SELL	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	857.1K	¥1,965	-20.6%	¥8.8B ($56.9M)
2021-11-18	BUY	negotiated	株式会社メルコホールディングス MELCO HOLDINGS INC.	activist	4.5M	¥1,935	+22.5%	¥8.7B ($56.0M)
2021-11-18	BUY	negotiated	株式会社メルコホールディングス MELCO HOLDINGS INC.	activist	4.5M	¥1,935	+22.5%	¥8.7B ($56.0M)
2021-11-08	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.3M	¥1,950	+21.5%	¥10.4B ($67.3M)

Frequently asked questions

Who has been buying Saison Technology Co., Ltd. stock?: 4 distinct investors have filed 5 disclosed large-shareholding filings in Saison Technology Co., Ltd. (9640), most recently on 2025-08-01. 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 Saison Technology Co., Ltd. have?: Saison Technology Co., Ltd. has 5 buy-side and 3 sell-side disclosures on record, covering ¥13.4B ($86.2M) in total reported value, spanning 2021-11-08 to 2025-08-01.
Where does StockDrifts get Saison Technology 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 Saison Technology Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.