Who has been buying KLab Inc. stock?

13 distinct investors have filed 58 disclosed large-shareholding filings in KLab Inc. (3656), most recently on 2026-01-19. 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 KLab Inc. have?

KLab Inc. has 58 buy-side and 62 sell-side disclosures on record, covering ¥29.7B ($191.5M) in total reported value, spanning 2022-07-29 to 2026-01-19.

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.

KLab Inc. 3656

Company

KLab株式会社KLab Inc.

Investors

Buys

Total Value

¥29.7B ($191.5M)

Avg Return

+2.36%

Last Filing

2026-01-19

KLab Inc. (3656) has 58 disclosed large-shareholding filings and 62 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥29.7B ($191.5M) in reported transaction value. The earliest filing StockDrifts holds for KLab Inc. is dated 2022-07-29; the most recent is 2026-01-19. Across these filings the average return since disclosure is +2.36%, 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
2026-09-10	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	10.7M	¥178	-	¥227M ($1.5M)
2026-09-10	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	12.0M	¥178	-	¥3M ($20K)
2026-09-10	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	10.7M	¥178	-2.3%	¥234M ($1.5M)
2026-09-10	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	12.0M	¥178	-2.3%	¥3M ($20K)
2026-09-09	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	11.9M	¥179	+1.7%	¥43M ($281K)
2026-09-09	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	12.5M	¥179	-1.7%	¥207M ($1.3M)
2026-09-09	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	11.9M	¥179	-	¥106M ($687K)
2026-09-09	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	12.0M	¥179	+1.7%	¥18M ($116K)
2026-09-09	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	13.8M	¥179	-1.7%	¥69M ($448K)
2026-09-07	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	15.5M	¥184	+1.1%	¥15M ($94K)
2026-09-07	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	14.0M	¥184	+1.1%	¥242M ($1.6M)
2026-09-04	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	19.4M	¥190	+4.2%	¥758M ($4.9M)
2026-09-04	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	18.6M	¥190	+4.2%	¥150M ($970K)
2026-09-04	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	17.4M	¥190	+4.2%	¥196M ($1.3M)
2026-09-04	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	16.4M	¥190	+4.2%	¥165M ($1.1M)
2026-09-04	SELL	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	15.6M	¥190	+4.2%	¥147M ($951K)
2026-01-19	BUY	Market Buy	ULTIMATE CLASSIC INVESTMENT LLC	activist	19.5M	¥327	-44.3%	¥5.5B ($35.4M)
2026-01-09	BUY	unknown	野村證券株式会社	other	350.7K	¥371	-50.9%	¥66M ($423K)
2026-01-09	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	910.7K	¥371	+50.9%	¥470M ($3.0M)
2026-01-09	SELL	unknown	野村アセットマネジメント株式会社	other	1.5M	¥371	+50.9%	¥111M ($717K)
2026-01-06	BUY	Market Buy	真田哲弥	activist	4.3M	¥350	-48.0%	¥514M ($3.3M)
2026-01-06	BUY	unknown	真田哲弥	activist	2.7M	¥350	-48.0%	¥328M ($2.1M)
2026-01-06	BUY	unknown	株式会社シックスセンツホールディングス	activist	2.0M	¥350	-48.0%	¥700M ($4.5M)
2026-01-06	BUY	Market Buy	株式会社シックスセンツホールディングス	activist	2.0M	¥350	-	¥700M ($4.5M)
2026-01-06	BUY	unknown	真田哲弥	activist	4.3M	¥350	-48.0%	¥514M ($3.3M)
2026-01-06	BUY	unknown	株式会社シックスセンツホールディングス	activist	2.0M	¥350	-	-
2026-01-06	BUY	unknown	真田哲弥	activist	2.7M	¥350	-48.0%	¥959M ($6.2M)
2026-01-06	BUY	unknown	株式会社シックスセンツホールディングス	activist	2.0M	¥350	-48.0%	¥700M ($4.5M)
2025-12-22	SELL	unknown	野村證券株式会社	other	139.8K	¥337	+46.0%	¥96M ($621K)
2025-12-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.7M	¥337	+46.0%	¥178M ($1.1M)
2025-12-22	BUY	unknown	野村アセットマネジメント株式会社	other	1.4M	¥337	-46.0%	¥2M ($13K)
2025-12-03	BUY	unknown	野村アセットマネジメント株式会社	other	1.4M	¥247	-26.3%	¥350M ($2.3M)
2025-12-03	BUY	unknown	野村證券株式会社	other	428.4K	¥247	-26.3%	¥106M ($683K)
2025-12-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.3M	¥247	-26.3%	¥558M ($3.6M)
2025-11-14	SELL	Market Buy	マッコーリーバンクリミテッド Macquarie Bank Limited	passive	2.3M	¥215	+15.3%	¥181M ($1.2M)
2025-11-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	143.2K	¥219	+16.9%	¥32M ($206K)
2025-11-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	627.5K	¥219	+16.9%	¥294M ($1.9M)
2025-11-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥219	-	-
2025-10-21	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	288.2K	¥245	+25.7%	¥281M ($1.8M)
2025-10-21	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	2.0M	¥245	-25.7%	¥289M ($1.9M)
2025-10-21	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥245	-	-
2025-10-17	SELL	Market Buy	マッコーリーバンクリミテッド Macquarie Bank Limited	passive	3.2M	¥224	+18.8%	¥172M ($1.1M)
2025-10-06	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.4M	¥220	+17.3%	¥166M ($1.1M)
2025-10-06	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	777.0K	¥220	-	¥171M ($1.1M)
2025-10-06	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥220	-17.3%	¥1M ($9K)
2025-09-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.2M	¥194	-6.2%	¥425M ($2.7M)
2025-09-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥194	-6.2%	¥273M ($1.8M)
2025-09-18	SELL	unknown	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	167.3K	¥204	+10.8%	¥123M ($795K)
2025-09-18	SELL	unknown	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	1.1M	¥204	+10.8%	¥182M ($1.2M)
2025-09-18	SELL	unknown	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	255.3K	¥204	+10.8%	¥5M ($32K)

Showing the 50 most recent of 149 filings.

Frequently asked questions

Who has been buying KLab Inc. stock?: 13 distinct investors have filed 58 disclosed large-shareholding filings in KLab Inc. (3656), most recently on 2026-01-19. 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 KLab Inc. have?: KLab Inc. has 58 buy-side and 62 sell-side disclosures on record, covering ¥29.7B ($191.5M) in total reported value, spanning 2022-07-29 to 2026-01-19.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.