Who has been buying Advanced Media, Inc. stock?

5 distinct investors have filed 12 disclosed large-shareholding filings in Advanced Media, Inc. (3773), most recently on 2026-02-09. 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 Advanced Media, Inc. have?

Advanced Media, Inc. has 12 buy-side and 8 sell-side disclosures on record, covering ¥5.6B ($36.4M) in total reported value, spanning 2021-12-07 to 2026-02-09.

Where does StockDrifts get Advanced Media, 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.

Advanced Media, Inc. 3773

Company

株式会社アドバンスト・メディアAdvanced Media, Inc.

Investors

Buys

Total Value

¥5.6B ($36.4M)

Avg Return

-23.72%

Last Filing

2026-02-09

Advanced Media, Inc. (3773) has 12 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥5.6B ($36.4M) in reported transaction value. The earliest filing StockDrifts holds for Advanced Media, Inc. is dated 2021-12-07; the most recent is 2026-02-09. 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 -23.72%, 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
2026-06-05	BUY	Market Buy	リム・アドバイザーズ・リミテッド(LIM Advisors Limited) LIM Advisors Limited	passive	1.1M	¥1,084	+3.2%	¥1.2B ($7.8M)
2026-02-09	SELL	Market Buy	株式会社アイビー IB, Inc.	passive	527.0K	¥1,121	-2.9%	¥602M ($3.9M)
2025-12-23	BUY	Market Buy	株式会社アイビー IB, Inc.	passive	1.1M	¥1,083	+6.6%	¥155M ($1.0M)
2025-11-12	BUY	Market Buy	株式会社アイビー IB, Inc.	passive	921.3K	¥1,039	+11.1%	¥957M ($6.2M)
2025-02-21	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	631.5K	¥892	-29.4%	¥348M ($2.2M)
2024-08-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.0M	¥1,136	-1.6%	¥297M ($1.9M)
2024-08-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥1,067	+8.2%	¥1.4B ($8.7M)
2024-08-07	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	unknown	0	¥1,067	-8.2%	¥33M ($215K)
2024-07-22	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	31.6K	¥1,168	+1.2%	¥13M ($83K)
2024-07-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.4M	¥1,168	-1.2%	¥1.7B ($10.7M)
2024-01-22	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	42.6K	¥2,044	-43.5%	¥87M ($562K)
2024-01-22	SELL	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	unknown	0	¥2,044	+43.5%	¥94M ($606K)
2024-01-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.7M	¥2,044	-43.5%	¥530M ($3.4M)
2023-12-22	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	42.6K	¥1,820	-36.6%	¥10M ($65K)
2023-12-22	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	45.1K	¥1,820	-36.6%	¥82M ($530K)
2023-12-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.5M	¥1,820	-36.6%	¥258M ($1.7M)
2023-06-22	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	36.8K	¥2,035	-43.3%	¥4M ($24K)
2023-06-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥2,035	-43.3%	¥483M ($3.1M)
2023-05-10	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	35.0K	¥1,813	-36.4%	¥63M ($409K)
2023-05-10	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥1,813	-36.4%	¥357M ($2.3M)
2023-04-07	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	35.0K	¥1,770	-34.8%	¥62M ($400K)
2023-04-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	886.3K	¥1,770	-34.8%	¥1.6B ($10.1M)
2022-07-07	SELL	Market Buy	株式会社ウィズ・パートナーズ Whiz Partners Inc.	engagement	686.3K	¥745	-54.9%	¥223M ($1.4M)
2021-12-07	SELL	Market Buy	株式会社ウィズ・パートナーズ Whiz Partners Inc.	engagement	986.3K	¥685	-68.5%	¥212M ($1.4M)

Frequently asked questions

Who has been buying Advanced Media, Inc. stock?: 5 distinct investors have filed 12 disclosed large-shareholding filings in Advanced Media, Inc. (3773), most recently on 2026-02-09. 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 Advanced Media, Inc. have?: Advanced Media, Inc. has 12 buy-side and 8 sell-side disclosures on record, covering ¥5.6B ($36.4M) in total reported value, spanning 2021-12-07 to 2026-02-09.
Where does StockDrifts get Advanced Media, 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 Advanced Media, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.