Who has been buying Datasection Inc. stock?

10 distinct investors have filed 27 disclosed large-shareholding filings in Datasection Inc. (3905), most recently on 2026-04-24. 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 Datasection Inc. have?

Datasection Inc. has 27 buy-side and 54 sell-side disclosures on record, covering ¥34.1B ($219.8M) in total reported value, spanning 2021-06-16 to 2026-04-24.

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.

Datasection Inc. 3905

Company

データセクション株式会社Datasection Inc.

Investors

Buys

Total Value

¥34.1B ($219.8M)

Avg Return

+10.49%

Last Filing

2026-04-24

Datasection Inc. (3905) has 27 disclosed large-shareholding filings and 54 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥34.1B ($219.8M) in reported transaction value. The earliest filing StockDrifts holds for Datasection Inc. is dated 2021-06-16; the most recent is 2026-04-24. Across these filings the average return since disclosure is +10.49%, 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
2026-09-07	BUY	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	3.7M	¥1,577	+31.7%	¥1.2B ($7.7M)
2026-09-02	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	3.7M	¥1,573	-32.0%	¥1.3B ($8.1M)
2026-09-02	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	2.9M	¥1,573	-32.0%	¥1.2B ($7.6M)
2026-09-01	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	36.1M	¥1,635	-27.0%	¥725M ($4.7M)
2026-09-01	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	35.3M	¥1,635	-27.0%	¥682M ($4.4M)
2026-09-01	BUY	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	35.3M	¥1,635	-	-
2026-08-21	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	36.9M	¥1,840	-12.9%	¥761M ($4.9M)
2026-08-21	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital inc.	other	4.5M	¥1,840	-12.9%	¥1.4B ($8.9M)
2026-08-14	BUY	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	5.2M	¥1,877	+10.7%	¥3.7B ($23.8M)
2026-08-14	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	3.0M	¥1,877	-10.7%	¥1.4B ($9.1M)
2026-08-13	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	37.6M	¥1,877	-10.7%	¥783M ($5.1M)
2026-08-13	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	38.4M	¥1,877	-10.7%	¥722M ($4.7M)
2026-08-12	BUY	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	39.1M	¥1,859	-	¥1.4B ($9.2M)
2026-08-12	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	3.7M	¥1,859	-11.7%	¥2.8B ($18.0M)
2026-08-12	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	39.1M	¥1,859	-11.7%	¥1.4B ($9.2M)
2026-07-28	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	40.6M	¥2,094	+0.8%	¥537M ($3.5M)
2026-07-28	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	41.1M	¥2,094	+0.8%	¥2.4B ($15.6M)
2026-07-28	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	3.1M	¥2,094	+0.8%	¥5.1B ($33.1M)
2026-07-28	BUY	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	5.2M	¥2,094	-	¥3.9B ($25.1M)
2026-07-28	BUY	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	5.2M	¥2,094	-0.8%	¥3.9B ($25.1M)
2026-07-27	SELL	Market Buy	杉原行洋	activist	2.7M	¥2,323	+10.6%	¥922M ($6.0M)
2026-07-27	SELL	Market Buy	ハヤテマネジメント株式会社	activist	951.0K	¥2,323	+10.6%	¥417M ($2.7M)
2026-06-12	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	43.6M	¥4,580	+54.6%	¥2.4B ($15.7M)
2026-06-12	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	5.6M	¥4,580	+54.6%	¥5.1B ($33.2M)
2026-06-12	BUY	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	43.6M	¥4,580	-	¥2.4B ($15.7M)
2026-06-02	BUY	acquisition	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	passive	3.1M	¥4,360	-52.4%	¥13.6B ($87.6M)
2026-05-29	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	6.7M	¥6,140	+66.2%	¥10.0B ($64.6M)
2026-05-29	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	44.7M	¥6,140	+66.2%	¥4.9B ($31.3M)
2026-05-29	BUY	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	44.7M	¥6,140	-	¥4.9B ($31.3M)
2026-04-24	BUY	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	8.3M	¥1,479	+40.4%	¥2.5B ($16.2M)
2026-04-24	SELL	subscription	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	6.2M	¥1,479	-40.4%	¥2.1B ($13.6M)
2026-04-21	BUY	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	46.3M	¥1,589	-	-
2026-04-21	SELL	private	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	46.3M	¥1,589	-30.7%	¥1.0B ($6.7M)
2026-04-10	SELL	Market Buy	杉原行洋	activist	2.9M	¥1,365	-52.2%	¥280M ($1.8M)
2026-04-10	SELL	Market Buy	ハヤテマネジメント株式会社	activist	1.1M	¥1,365	-52.2%	¥179M ($1.2M)
2026-03-11	SELL	Market Buy	杉原行洋	activist	3.3M	¥1,690	-22.9%	¥2.1B ($13.4M)
2026-03-11	SELL	Market Buy	ハヤテマネジメント株式会社	activist	1.3M	¥1,690	-22.9%	¥805M ($5.2M)
2026-03-11	SELL	Market Buy	杉原行洋	activist	3.1M	¥1,690	-22.9%	¥317M ($2.0M)
2026-03-11	SELL	Market Buy	ハヤテマネジメント株式会社	activist	1.2M	¥1,690	-22.9%	¥191M ($1.2M)
2025-11-25	BUY	Market Buy	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	47.7M	¥2,051	-	-
2025-11-25	BUY	Market Buy	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	7.6M	¥2,051	+1.3%	¥5.1B ($32.8M)
2025-11-13	BUY	Market Buy	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	47.7M	¥2,635	-	-
2025-11-13	BUY	Market Buy	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	4.6M	¥2,635	-21.2%	¥7.6B ($49.1M)
2025-10-31	BUY	unknown	アースエレメンツ・キャピタル株式会社 Earth Elements Capital Inc.	other	1.5M	¥1,927	+7.8%	¥2.9B ($18.5M)
2025-10-31	BUY	Market Buy	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	47.7M	¥1,927	-	-
2025-10-24	BUY	Market Buy	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	47.7M	¥1,816	-	¥20.3B ($131.3M)
2025-10-24	BUY	Market Buy	FIRST PLUS FINANCIAL HOLDINGS PTE. LTD. First Plus Financial Holdings PTE. LTD.	activist	47.7M	¥1,816	+14.4%	¥20.3B ($131.3M)
2025-10-07	SELL	Market Buy	日本生命保険相互会社 Nippon Life Insurance Company	passive	0	¥1,899	-9.4%	¥2.8B ($18.1M)
2025-10-06	SELL	unknown	KDDI株式会社 KDDI CORPORATION	other	817.0K	¥2,200	+5.6%	¥671M ($4.3M)
2025-10-03	SELL	unknown	KDDI株式会社 KDDI CORPORATION	other	2.1M	¥2,115	+1.8%	¥2.5B ($16.0M)

Showing the 50 most recent of 146 filings.

Frequently asked questions

Who has been buying Datasection Inc. stock?: 10 distinct investors have filed 27 disclosed large-shareholding filings in Datasection Inc. (3905), most recently on 2026-04-24. 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 Datasection Inc. have?: Datasection Inc. has 27 buy-side and 54 sell-side disclosures on record, covering ¥34.1B ($219.8M) in total reported value, spanning 2021-06-16 to 2026-04-24.
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.