Who has been buying NTT Data Intramart Corporation stock?

4 distinct investors have filed 3 disclosed large-shareholding filings in NTT Data Intramart Corporation (3850), most recently on 2026-04-03. 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 NTT Data Intramart Corporation have?

NTT Data Intramart Corporation has 3 buy-side and 9 sell-side disclosures on record, covering ¥4.3B ($27.6M) in total reported value, spanning 2021-10-21 to 2026-04-03.

Where does StockDrifts get NTT Data Intramart Corporation 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.

NTT Data Intramart Corporation 3850

Company

株式会社エヌ・ティ・ティ・データ・イントラマートNTT Data Intramart Corporation

Investors

Buys

Total Value

¥4.3B ($27.6M)

Avg Return

+36.99%

Last Filing

2026-04-03

NTT Data Intramart Corporation (3850) has 3 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥4.3B ($27.6M) in reported transaction value. The earliest filing StockDrifts holds for NTT Data Intramart Corporation is dated 2021-10-21; the most recent is 2026-04-03. 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 +36.99%, 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
2026-08-10	BUY	Market Buy	株式会社UH Partners 2	passive	99.7K	¥3,390	-2.4%	¥183M ($1.2M)
2026-08-10	BUY	Market Buy	光通信株式会社	passive	372.2K	¥3,390	-2.4%	¥1.3B ($8.1M)
2026-07-30	BUY	Market Buy	株式会社UH Partners 2	passive	45.8K	¥3,140	+5.4%	¥144M ($928K)
2026-07-30	BUY	Market Buy	光通信株式会社	passive	372.2K	¥3,140	+5.4%	¥23M ($151K)
2026-07-14	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	364.7K	¥3,120	+9.0%	¥186M ($1.2M)
2026-07-02	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	305.1K	¥3,055	+4.6%	¥153M ($986K)
2026-06-18	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	255.4K	¥2,811	+8.0%	¥718M ($4.6M)
2026-04-03	SELL	unknown	株式会社NTTデータ NTT DATA Japan Corporation	other	1.1M	¥2,848	+5.8%	¥336M ($2.2M)
2026-03-06	BUY	unknown	株式会社NTTデータ NTT DATA Japan Corporation	other	1.2M	¥3,115	-9.3%	¥3.6B ($23.0M)
2026-03-06	SELL	unknown	株式会社NTTデータ NTT DATA Japan Corporation	other	1.2M	¥3,115	+9.3%	¥3.6B ($23.0M)
2025-09-26	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	221.7K	¥3,870	+27.0%	¥109M ($705K)
2025-08-25	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	249.5K	¥4,200	+32.7%	¥210M ($1.4M)
2024-10-11	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	299.8K	¥2,278	+24.0%	¥113M ($728K)
2024-08-19	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	250.2K	¥2,176	+29.8%	¥544M ($3.5M)
2023-07-10	SELL	unknown	株式会社NTTデータグループ NTT DATA GROUP CORPORATION	other	0	¥1,798	-57.1%	¥4.2B ($26.9M)
2023-07-10	BUY	unknown	株式会社NTTデータ NTT DATA JAPAN CORPORATION	other	2.3M	¥1,798	+57.1%	¥4.2B ($26.9M)
2023-07-10	BUY	unknown	株式会社NTTデータ NTT DATA JAPAN CORPORATION	other	2.3M	¥1,798	+57.1%	¥4.2B ($26.9M)
2023-07-10	BUY	unknown	株式会社NTTデータグループ NTT DATA GROUP CORPORATION	other	0	¥1,798	+57.1%	¥4.2B ($26.9M)
2023-05-15	BUY	unknown	株式会社エヌ・ティ・ティ・データ NTT DATA CORPORATION	other	2.3M	¥1,619	+74.5%	¥3.8B ($24.2M)
2022-05-19	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	181.9K	¥1,360	-107.7%	¥193M ($1.2M)
2022-04-06	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	323.8K	¥1,990	-42.0%	¥125M ($808K)
2022-02-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	386.6K	¥2,050	-37.8%	¥106M ($682K)
2021-10-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	438.2K	¥2,570	-9.9%	¥129M ($830K)

Frequently asked questions

Who has been buying NTT Data Intramart Corporation stock?: 4 distinct investors have filed 3 disclosed large-shareholding filings in NTT Data Intramart Corporation (3850), most recently on 2026-04-03. 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 NTT Data Intramart Corporation have?: NTT Data Intramart Corporation has 3 buy-side and 9 sell-side disclosures on record, covering ¥4.3B ($27.6M) in total reported value, spanning 2021-10-21 to 2026-04-03.
Where does StockDrifts get NTT Data Intramart Corporation 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 NTT Data Intramart Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.