Who has been buying Topcon Corporation stock?

46 distinct investors have filed 87 disclosed large-shareholding filings in Topcon Corporation (7732), most recently on 2025-10-08. 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 Topcon Corporation have?

Topcon Corporation has 87 buy-side and 59 sell-side disclosures on record, covering ¥440.4B ($2.8B) in total reported value, spanning 2021-04-05 to 2025-10-08.

Where does StockDrifts get Topcon 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.

Topcon Corporation 7732

Company

株式会社トプコンTopcon Corporation

Investors

Buys

Total Value

¥440.4B ($2.8B)

Avg Return

+42.16%

Last Filing

2025-10-08

Topcon Corporation (7732) has 87 disclosed large-shareholding filings and 59 disclosed disposals on record, filed by 46 distinct investors. Together those filings cover ¥440.4B ($2.8B) in reported transaction value. The earliest filing StockDrifts holds for Topcon Corporation is dated 2021-04-05; the most recent is 2025-10-08. 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 +42.16%, 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
2025-10-08	BUY	unknown	バリューアクト・ストラテジック・マスター・ファンド・フォー・エルピー ValueAct Strategic Master Fund IV L.P.	other	0	¥3,282	+0.1%	-
2025-10-08	SELL	unknown	バリューアクト・ストラテジック・マスター・ファンド・ツー・エルピー(ValueAct Strategic Master Fund II ValueAct Strategic Master Fund II	other	0	¥3,282	-0.1%	¥18.6B ($120.1M)
2025-10-08	SELL	unknown	バリューアクト・ジャパン・マスター・ファンド・エルピー(ValueAct Japan Master Fund ValueAct Japan Master Fund LP	other	0	¥3,282	-0.1%	¥32.0B ($206.7M)
2025-10-08	BUY	unknown	バリューアクト・ストラテジック・マスター・ファンド・フォー・エルピー ValueAct Strategic Master Fund IV L.P.	other	0	¥3,282	+0.1%	-
2025-10-08	SELL	unknown	バリューアクト・ストラテジック・マスター・ファンド・ツー・エルピー(ValueAct Strategic Master Fund II ValueAct Strategic Master Fund II	other	0	¥3,282	-0.1%	¥18.6B ($120.1M)
2025-10-08	SELL	unknown	バリューアクト・ジャパン・マスター・ファンド・エルピー(ValueAct Japan Master Fund ValueAct Japan Master Fund LP	other	0	¥3,282	-0.1%	¥32.0B ($206.7M)
2025-10-08	BUY	unknown	バリューアクト・キャピタル・マネジメント・エルピー(ValueAct Capital Management ValueAct Capital Management	other	0	¥3,282	+0.1%	-
2025-10-08	BUY	unknown	バリューアクト・キャピタル・マネジメント・エルピー(ValueAct Capital Management ValueAct Capital Management	other	0	¥3,282	+0.1%	-
2025-09-30	SELL	negotiated	三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd.	other	800	¥3,276	-0.3%	¥4.8B ($30.7M)
2025-09-30	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	728.7K	¥3,276	-0.3%	¥36M ($229K)
2025-09-30	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.1M	¥3,276	-0.3%	¥888M ($5.7M)
2025-09-30	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.4M	¥3,276	+0.3%	¥4.6B ($29.6M)
2025-09-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.3M	¥3,277	-0.2%	¥959M ($6.2M)
2025-09-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	313.0K	¥3,277	-0.2%	¥8.0B ($51.6M)
2025-09-22	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	234.4K	¥3,277	-0.2%	¥7.8B ($50.4M)
2025-09-18	BUY	unknown	バリューアクト・ストラテジック・マスター・ファンド・フォー・エルピー ValueAct Strategic Master Fund IV L.P.	other	0	¥3,280	+0.1%	-
2025-09-18	SELL	unknown	バリューアクト・ストラテジック・マスター・ファンド・ツー・エルピー(ValueAct Strategic Master Fund II ValueAct Strategic Master Fund II	other	0	¥3,280	-0.1%	¥18.6B ($120.0M)
2025-09-18	SELL	unknown	バリューアクト・ジャパン・マスター・ファンド・エルピー(ValueAct Japan Master Fund ValueAct Japan Master Fund LP	other	0	¥3,280	-0.1%	¥32.0B ($206.5M)
2025-09-18	BUY	unknown	バリューアクト・ストラテジック・マスター・ファンド・フォー・エルピー ValueAct Strategic Master Fund IV L.P.	other	0	¥3,280	+0.1%	-
2025-09-18	SELL	unknown	バリューアクト・ストラテジック・マスター・ファンド・ツー・エルピー(ValueAct Strategic Master Fund II ValueAct Strategic Master Fund II	other	0	¥3,280	-0.1%	¥18.6B ($120.0M)
2025-09-18	SELL	unknown	バリューアクト・ジャパン・マスター・ファンド・エルピー(ValueAct Japan Master Fund ValueAct Japan Master Fund LP	other	0	¥3,280	-0.1%	¥32.0B ($206.5M)
2025-09-18	BUY	unknown	バリューアクト・キャピタル・マネジメント・エルピー(ValueAct Capital Management ValueAct Capital Management	other	0	¥3,280	+0.1%	-
2025-09-18	SELL	unknown	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.	other	0	¥3,280	-0.1%	¥37.6B ($242.7M)
2025-09-18	BUY	unknown	バリューアクト・キャピタル・マネジメント・エルピー(ValueAct Capital Management ValueAct Capital Management	other	0	¥3,280	+0.1%	-
2025-09-18	BUY	acquisition	TK株式会社 TK Co., Ltd.	activist	84.7M	¥3,280	+0.1%	¥278.0B ($1.8B)
2025-09-16	BUY	negotiated	三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd.	other	1.5M	¥3,282	+0.1%	¥4.8B ($30.8M)
2025-09-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	732.3K	¥3,282	+0.1%	¥2.4B ($15.5M)
2025-09-16	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.3M	¥3,282	+0.1%	¥7.6B ($49.3M)
2025-09-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.4M	¥3,282	+0.1%	¥4.6B ($29.7M)
2025-09-05	BUY	unknown	UBS Europe SE	other	18.1K	¥3,296	-0.3%	¥6.6B ($42.4M)
2025-09-05	BUY	unknown	UBS Fund ManagementAG Switzerland	other	190.1K	¥3,296	-0.3%	¥71M ($461K)
2025-09-05	BUY	unknown	UBS Asset ManagementLLC. Americas	other	2.3M	¥3,296	-0.3%	¥786M ($5.1M)
2025-09-05	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.6M	¥3,296	+0.3%	¥500M ($3.2M)
2025-09-05	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.8M	¥3,296	-0.3%	¥4.3B ($27.4M)
2025-09-05	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.6M	¥3,296	+0.3%	¥357M ($2.3M)
2025-09-05	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	1.4M	¥3,296	+0.3%	¥5.7B ($36.9M)
2025-06-20	BUY	unknown	UBS Europe SE	other	177.7K	¥3,256	+0.9%	¥579M ($3.7M)
2025-06-20	BUY	unknown	UBS Fund ManagementAG Switzerland	other	176.3K	¥3,256	+0.9%	¥574M ($3.7M)
2025-06-20	BUY	unknown	UBS Asset ManagementLLC. Americas	other	2.1M	¥3,256	+0.9%	¥6.8B ($43.6M)
2025-06-20	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	3.2M	¥3,256	+0.9%	¥10.3B ($66.8M)
2025-06-10	BUY	Market Buy	バリューアクト・ストラテジック・マスター・ファンド・ツー・エルピー(ValueAct Strategic Master Fund II ValueAct Strategic Master Fund II	activist	5.7M	¥3,261	+0.7%	¥18.5B ($119.3M)
2025-06-10	BUY	Market Buy	バリューアクト・ジャパン・マスター・ファンド・エルピー(ValueAct Japan Master Fund ValueAct Japan Master Fund LP	activist	9.8M	¥3,261	+0.7%	¥31.8B ($205.2M)
2025-06-10	BUY	Market Buy	バリューアクト・キャピタル・マネジメント・エルピー(ValueAct Capital Management ValueAct Capital Management	activist	0	¥3,261	+0.7%	-
2025-05-09	BUY	unknown	UBS Fund ManagementAG Switzerland	other	198.9K	¥3,224	+1.9%	¥70M ($451K)
2025-05-09	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.8M	¥3,224	-1.9%	¥35M ($225K)
2025-05-09	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.5M	¥3,224	+1.9%	¥3.2B ($21.0M)
2025-05-09	BUY	unknown	UBS Europe SE	other	300.3K	¥3,224	+1.9%	¥35M ($225K)
2025-05-09	BUY	unknown	UBS Asset ManagementLLC. Americas	other	1.4M	¥3,224	+1.9%	¥2.7B ($17.4M)
2025-05-09	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	3.2M	¥3,224	-1.9%	¥7.5B ($48.2M)
2025-05-09	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.7M	¥3,224	-1.9%	¥349M ($2.3M)

Showing the 50 most recent of 179 filings.

Frequently asked questions

Who has been buying Topcon Corporation stock?: 46 distinct investors have filed 87 disclosed large-shareholding filings in Topcon Corporation (7732), most recently on 2025-10-08. 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 Topcon Corporation have?: Topcon Corporation has 87 buy-side and 59 sell-side disclosures on record, covering ¥440.4B ($2.8B) in total reported value, spanning 2021-04-05 to 2025-10-08.
Where does StockDrifts get Topcon 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 Topcon Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.