Who has been buying K&O Energy Group Inc. stock?

3 distinct investors have filed 2 disclosed large-shareholding filings in K&O Energy Group Inc. (1663), most recently on 2026-04-06. 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 K&O Energy Group Inc. have?

K&O Energy Group Inc. has 2 buy-side and 4 sell-side disclosures on record, covering ¥1.4B ($9.1M) in total reported value, spanning 2021-05-31 to 2026-04-06.

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.

K&O Energy Group Inc. 1663

Company

K&Oエナジーグループ株式会社K&O Energy Group Inc.

Investors

Buys

Total Value

¥1.4B ($9.1M)

Avg Return

+176.40%

Last Filing

2026-04-06

K&O Energy Group Inc. (1663) has 2 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥1.4B ($9.1M) in reported transaction value. The earliest filing StockDrifts holds for K&O Energy Group Inc. is dated 2021-05-31; the most recent is 2026-04-06. Across these filings the average return since disclosure is +176.40%, 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
2026-04-06	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	4.6M	¥5,090	-	-
2026-04-06	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	4.6M	¥5,090	-	¥1.5B ($10.0M)
2025-06-20	SELL	Market Buy	シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド (Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd.	passive	1.4M	¥2,973	+35.5%	¥1.3B ($8.6M)
2025-05-22	SELL	Market Buy	シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド (Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd.	passive	1.9M	¥2,927	+34.5%	¥1.2B ($7.8M)
2025-05-09	SELL	Market Buy	シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド (Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd.	passive	2.3M	¥2,827	+32.1%	¥1.0B ($6.6M)
2023-06-09	SELL	Market Buy	シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド (Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd.	passive	2.6M	¥2,249	+14.7%	¥650M ($4.2M)
2022-12-08	BUY	Market Buy	株式会社合同資源 GODO SHIGEN CO.,LTD.	other	4.9M	¥2,259	-15.1%	¥851M ($5.5M)
2022-01-05	BUY	Market Buy	シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド (Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd.	activist	2.9M	¥1,449	+32.4%	¥558M ($3.6M)
2021-05-31	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	4.6M	¥1,360	-	¥198M ($1.3M)
2021-05-31	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	4.6M	¥1,360	-	¥6.2B ($40.1M)

Frequently asked questions

Who has been buying K&O Energy Group Inc. stock?: 3 distinct investors have filed 2 disclosed large-shareholding filings in K&O Energy Group Inc. (1663), most recently on 2026-04-06. 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 K&O Energy Group Inc. have?: K&O Energy Group Inc. has 2 buy-side and 4 sell-side disclosures on record, covering ¥1.4B ($9.1M) in total reported value, spanning 2021-05-31 to 2026-04-06.
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.