Who has been buying Transaction Media Networks Inc. stock?

15 distinct investors have filed 25 disclosed large-shareholding filings in Transaction Media Networks Inc. (5258), most recently on 2025-12-01. 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 Transaction Media Networks Inc. have?

Transaction Media Networks Inc. has 25 buy-side and 11 sell-side disclosures on record, covering ¥29.3B ($188.8M) in total reported value, spanning 2023-04-10 to 2025-12-01.

Where does StockDrifts get Transaction Media Networks 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.

Transaction Media Networks Inc. 5258

Company

株式会社トランザクション・メディア・ネットワークスTransaction Media Networks Inc.

Investors

Buys

Total Value

¥29.3B ($188.8M)

Avg Return

-59.09%

Last Filing

2025-12-01

Transaction Media Networks Inc. (5258) has 25 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥29.3B ($188.8M) in reported transaction value. The earliest filing StockDrifts holds for Transaction Media Networks Inc. is dated 2023-04-10; the most recent is 2025-12-01. 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 -59.09%, 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
2025-12-01	BUY	Market Buy	木田裕介 KIDA YUSUKE	passive	2.1M	¥466	-31.1%	¥122M ($790K)
2025-09-25	BUY	Market Buy	木田裕介 Yusuke Kida	passive	1.9M	¥452	-29.0%	¥853M ($5.5M)
2025-07-03	SELL	unknown	三菱商事株式会社 Mitsubishi Corporation	strategic	5.0M	¥433	+25.9%	¥1.9B ($12.5M)
2025-07-01	BUY	unknown	トヨタファイナンス株式会社 Toyota Finance Co., Ltd.	other	471.0K	¥472	-32.0%	¥222M ($1.4M)
2025-07-01	SELL	unknown	トヨタファイナンス株式会社 Toyota Finance Co., Ltd.	other	471.0K	¥472	+32.0%	¥283M ($1.8M)
2025-07-01	SELL	unknown	トヨタファイナンシャルサービス株式会社 Toyota Financial Services Corporation	other	2.4M	¥472	+32.0%	¥548M ($3.5M)
2025-07-01	SELL	unknown	トヨタファイナンシャルサービス株式会社 Toyota Financial Services Corporation	other	2.4M	¥472	+32.0%	¥548M ($3.5M)
2025-04-22	BUY	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	319.4K	¥266	+20.7%	¥7.6B ($49.3M)
2025-02-06	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	3.2M	¥389	-17.5%	¥173M ($1.1M)
2024-12-05	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	2.7M	¥438	-26.7%	¥193M ($1.2M)
2024-03-19	BUY	Market Buy	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	1.4M	¥619	-48.1%	¥864M ($5.6M)
2024-03-19	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	0	¥619	+48.1%	¥121M ($782K)
2024-03-19	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	174.5K	¥619	+48.1%	¥119M ($767K)
2024-03-07	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	2.3M	¥657	-51.1%	¥296M ($1.9M)
2023-12-21	BUY	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co.,Ltd.	other	1.9M	¥637	-49.6%	¥1.2B ($7.6M)
2023-10-05	BUY	unknown	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	1.4M	¥864	-62.9%	¥1.2B ($7.8M)
2023-10-05	BUY	unknown	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	366.4K	¥864	-62.9%	¥317M ($2.0M)
2023-10-05	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	193.9K	¥864	-62.9%	¥168M ($1.1M)
2023-09-11	BUY	unknown	ユーシーカード株式会社 UC Card Co., Ltd.	strategic	1.4M	¥956	-66.4%	¥1.3B ($8.6M)
2023-09-11	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	70.0K	¥956	+66.4%	¥64M ($410K)
2023-09-11	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	10.0K	¥956	-66.4%	¥727M ($4.7M)
2023-08-16	BUY	unknown	ユーシーカード株式会社 UC Card Co., Ltd.	strategic	1.4M	¥1,124	-71.4%	¥1.6B ($10.1M)
2023-08-16	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	135.0K	¥1,124	-71.4%	¥152M ($979K)
2023-08-16	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	345.5K	¥1,124	+71.4%	¥444M ($2.9M)
2023-08-01	BUY	unknown	ユーシーカード株式会社 UC Card Co., Ltd.	strategic	1.4M	¥1,377	-76.7%	¥1.9B ($12.4M)
2023-08-01	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	135.0K	¥1,377	-76.7%	¥186M ($1.2M)
2023-08-01	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	741.1K	¥1,377	-76.7%	¥1.0B ($6.6M)
2023-07-12	SELL	unknown	株式会社NTTドコモ NTT DOCOMO, INC.	unknown	0	¥1,515	+78.8%	¥3.9B ($24.9M)
2023-05-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	166.0K	¥1,340	-76.0%	¥119M ($765K)
2023-05-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	196.5K	¥1,340	-76.0%	¥79M ($510K)
2023-05-19	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	0	¥1,340	+76.0%	¥23M ($147K)
2023-05-09	SELL	unknown	三菱商事株式会社 Mitsubishi Corporation	strategic	9.4M	¥1,388	+76.9%	¥901M ($5.8M)
2023-05-08	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	79.0K	¥1,363	-76.5%	¥108M ($695K)
2023-05-08	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	137.4K	¥1,363	-76.5%	¥187M ($1.2M)
2023-05-08	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.7M	¥1,363	-76.5%	¥2.3B ($15.0M)
2023-04-11	BUY	unknown	トヨタファイナンス株式会社 Toyota Finance Co., Ltd.	other	1.1M	¥1,110	-71.1%	¥1.2B ($7.6M)
2023-04-11	BUY	unknown	トヨタファイナンス株式会社 Toyota Finance Co., Ltd.	other	1.1M	¥1,110	-71.1%	¥1.2B ($7.6M)
2023-04-11	BUY	unknown	トヨタファイナンシャルサービス株式会社 Toyota Financial Services Corporation	other	3.6M	¥1,110	-71.1%	¥4.0B ($25.5M)
2023-04-11	BUY	unknown	株式会社NTTドコモ NTT DOCOMO,INC.	strategic	2.5M	¥1,110	-71.1%	¥2.8B ($18.2M)
2023-04-11	BUY	unknown	トヨタファイナンシャルサービス株式会社 Toyota Financial Services Corporation	other	3.6M	¥1,110	-71.1%	¥4.0B ($25.5M)
2023-04-10	BUY	unknown	三菱商事株式会社 Mitsubishi Corporation	strategic	10.1M	¥1,104	-70.9%	¥11.1B ($71.7M)

Frequently asked questions

Who has been buying Transaction Media Networks Inc. stock?: 15 distinct investors have filed 25 disclosed large-shareholding filings in Transaction Media Networks Inc. (5258), most recently on 2025-12-01. 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 Transaction Media Networks Inc. have?: Transaction Media Networks Inc. has 25 buy-side and 11 sell-side disclosures on record, covering ¥29.3B ($188.8M) in total reported value, spanning 2023-04-10 to 2025-12-01.
Where does StockDrifts get Transaction Media Networks 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 Transaction Media Networks Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.