Who has been buying ktk Inc. stock?

4 distinct investors have filed 10 disclosed large-shareholding filings in ktk Inc. (3035), most recently on 2025-08-22. 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 ktk Inc. have?

ktk Inc. has 10 buy-side and 2 sell-side disclosures on record, covering ¥221M ($1.4M) in total reported value, spanning 2022-02-07 to 2025-08-22.

Where does StockDrifts get ktk 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.

ktk Inc. 3035

Company

ケイティケイ株式会社ktk Inc.

Investors

Buys

Total Value

¥221M ($1.4M)

Avg Return

+38.77%

Last Filing

2025-08-22

ktk Inc. (3035) has 10 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥221M ($1.4M) in reported transaction value. The earliest filing StockDrifts holds for ktk Inc. is dated 2022-02-07; the most recent is 2025-08-22. 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 +38.77%, 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
2025-08-22	BUY	Market Buy	青山深雪 Aoyama Miyuki	strategic	130.0K	¥646	+17.3%	¥84M ($542K)
2025-08-22	BUY	Market Buy	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥646	+17.3%	¥840M ($5.4M)
2025-08-22	BUY	Market Buy	青山英生 aoyamahideo	activist	155.5K	¥646	+17.3%	¥6M ($41K)
2024-08-21	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥571	+32.8%	¥742M ($4.8M)
2024-08-21	BUY	Market Buy	青山深雪 Aoyama Miyuki	strategic	130.0K	¥571	+32.8%	¥74M ($479K)
2024-08-21	BUY	Market Buy	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥571	+32.8%	¥742M ($4.8M)
2024-08-21	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥571	+32.8%	¥74M ($479K)
2024-08-21	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥571	+32.8%	¥742M ($4.8M)
2024-08-21	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥571	+32.8%	¥74M ($479K)
2024-08-21	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥571	+32.8%	¥742M ($4.8M)
2024-08-21	BUY	negotiated	青山英生 aoyamahideo	activist	146.1K	¥571	+32.8%	¥83M ($538K)
2024-08-21	BUY	negotiated	青山英生 aoyamahideo	activist	146.1K	¥571	+32.8%	¥6M ($36K)
2024-08-21	BUY	Market Buy	青山英生 aoyamahideo	activist	146.1K	¥571	+32.8%	¥6M ($36K)
2024-08-21	BUY	negotiated	青山英生 aoyamahideo	activist	146.1K	¥571	+32.8%	¥83M ($538K)
2024-08-21	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥571	+32.8%	¥74M ($479K)
2023-08-28	BUY	Market Buy	青山深雪 Aoyama Miyuki	strategic	130.0K	¥587	+29.1%	¥76M ($492K)
2023-08-28	BUY	Market Buy	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥587	+29.1%	¥763M ($4.9M)
2023-08-28	BUY	Market Buy	青山深雪 Aoyama Miyuki	strategic	130.0K	¥587	+29.1%	¥76M ($492K)
2023-08-28	BUY	Market Buy	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥587	+29.1%	¥763M ($4.9M)
2023-08-28	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥587	+29.1%	¥76M ($492K)
2023-08-28	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥587	+29.1%	¥763M ($4.9M)
2023-08-28	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥587	+29.1%	¥76M ($492K)
2023-08-28	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥587	+29.1%	¥763M ($4.9M)
2023-08-28	BUY	negotiated	青山英生 aoyamahideo	activist	136.3K	¥587	+29.1%	¥9M ($56K)
2023-08-28	BUY	negotiated	青山英生 aoyamahideo	activist	136.3K	¥587	+29.1%	¥9M ($56K)
2023-08-28	BUY	Market Buy	青山英生 aoyamahideo	activist	136.3K	¥587	+29.1%	¥9M ($56K)
2023-08-28	BUY	Market Buy	青山英生 aoyamahideo	activist	136.3K	¥587	+29.1%	¥9M ($56K)
2023-08-22	BUY	Market Buy	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥554	+36.8%	¥720M ($4.6M)
2023-08-22	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥554	+36.8%	¥72M ($465K)
2023-08-22	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥554	+36.8%	¥720M ($4.6M)
2023-08-22	BUY	negotiated	青山英生 aoyamahideo	activist	136.3K	¥554	+36.8%	¥8M ($53K)
2023-08-22	BUY	Market Buy	青山英生 aoyamahideo	activist	136.3K	¥554	+36.8%	¥8M ($53K)
2023-08-22	BUY	Market Buy	青山深雪 Aoyama Miyuki	strategic	130.0K	¥554	+36.8%	¥72M ($465K)
2022-04-05	BUY	negotiated	青山深雪 Aoyama Miyuki	strategic	130.0K	¥353	+114.7%	¥46M ($296K)
2022-04-05	BUY	negotiated	青雲堂株式会社 Seiundo Co., Ltd.	strategic	1.3M	¥353	+114.7%	¥152M ($979K)
2022-04-05	SELL	negotiated	青山英生 aoyamahideo	activist	121.3K	¥353	-114.7%	¥147M ($949K)
2022-02-07	SELL	Market Buy	名古屋中小企業投資育成株式会社 Nagoya Small and Medium Business Investment & Consultation CO.,Ltd.	passive	399.0K	¥301	-151.8%	¥67M ($435K)
2022-02-07	BUY	Market Buy	名古屋中小企業投資育成株式会社 Nagoya Small and Medium Business Investment & Consultation CO.,Ltd.	passive	399.0K	¥301	+151.8%	¥67M ($435K)

Frequently asked questions

Who has been buying ktk Inc. stock?: 4 distinct investors have filed 10 disclosed large-shareholding filings in ktk Inc. (3035), most recently on 2025-08-22. 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 ktk Inc. have?: ktk Inc. has 10 buy-side and 2 sell-side disclosures on record, covering ¥221M ($1.4M) in total reported value, spanning 2022-02-07 to 2025-08-22.
Where does StockDrifts get ktk 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 ktk Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.