Who has been buying Polaris Holdings Co., Ltd. stock?

19 distinct investors have filed 18 disclosed large-shareholding filings in Polaris Holdings Co., Ltd. (3010), most recently on 2026-04-30. 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 Polaris Holdings Co., Ltd. have?

Polaris Holdings Co., Ltd. has 18 buy-side and 59 sell-side disclosures on record, covering ¥18.8B ($121.3M) in total reported value, spanning 2021-06-03 to 2026-04-30.

Where does StockDrifts get Polaris Holdings Co., Ltd. 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.

Polaris Holdings Co., Ltd. 3010

Company

ポラリス・ホールディングス株式会社Polaris Holdings Co., Ltd.

Investors

Buys

Total Value

¥18.8B ($121.3M)

Avg Return

+51.64%

Last Filing

2026-04-30

Polaris Holdings Co., Ltd. (3010) has 18 disclosed large-shareholding filings and 59 disclosed disposals on record, filed by 19 distinct investors. Together those filings cover ¥18.8B ($121.3M) in reported transaction value. The earliest filing StockDrifts holds for Polaris Holdings Co., Ltd. is dated 2021-06-03; the most recent is 2026-04-30. 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 +51.64%, 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
2026-04-30	BUY	unknown	スターアジア・グループ・エルエルシー Star Asia Group LLC	activist	62.6K	¥176	-1.7%	¥11M ($71K)
2026-04-30	BUY	unknown	スターアジア・キャピタル・マネジメント・エルエルシー Star Asia Capital Management LLC	activist	721.0K	¥176	-1.7%	¥127M ($819K)
2026-04-30	BUY	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	106.2M	¥176	-1.7%	¥18.7B ($120.6M)
2026-04-30	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.3M	¥176	-1.7%	¥403M ($2.6M)
2026-04-30	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.3M	¥176	-1.7%	¥403M ($2.6M)
2026-04-30	BUY	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	62.4M	¥176	-1.7%	¥11.0B ($70.8M)
2026-04-30	BUY	unknown	スターアジア・グループ・エルエルシー Star Asia Group LLC	activist	62.6K	¥176	-1.7%	¥11M ($71K)
2026-04-30	BUY	unknown	スターアジア・キャピタル・マネジメント・エルエルシー Star Asia Capital Management LLC	activist	721.0K	¥176	-1.7%	¥127M ($819K)
2026-04-30	BUY	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	106.2M	¥176	-1.7%	¥18.7B ($120.6M)
2026-04-30	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.3M	¥176	-1.7%	¥403M ($2.6M)
2026-04-30	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.3M	¥176	-1.7%	¥403M ($2.6M)
2026-04-30	BUY	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	62.4M	¥176	-1.7%	¥11.0B ($70.8M)
2026-03-27	BUY	unknown	スターアジア・キャピタル・マネジメント・エルエルシー Star Asia Capital Management LLC	activist	721.0K	¥187	+3.7%	¥130M ($837K)
2026-03-27	SELL	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	106.2M	¥187	+3.7%	¥19.1B ($123.3M)
2026-03-27	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.3M	¥187	-3.7%	¥412M ($2.7M)
2026-03-27	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.3M	¥187	-3.7%	¥412M ($2.7M)
2026-03-27	SELL	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	62.4M	¥187	+3.7%	¥11.2B ($72.4M)
2026-03-25	BUY	Market Buy	ザ・トラスティーズ・オブ・コロンビア・ユニバーシティ・イン・ザ・シティ・オブ・ニューヨーク(The Trustees of Columbia University in the City of New York) The Trustees of Columbia University in the City of New York	passive	23.2M	¥186	-3.2%	¥848M ($5.5M)
2025-05-29	BUY	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	106.2M	¥240	-25.0%	¥90M ($579K)
2025-05-29	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.3M	¥240	-25.0%	¥28M ($181K)
2025-05-29	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.3M	¥240	-25.0%	¥28M ($181K)
2025-05-29	SELL	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	69.0M	¥240	+25.0%	¥4.9B ($31.7M)
2025-05-28	BUY	Market Buy	ザ・トラスティーズ・オブ・コロンビア・ユニバーシティ・イン・ザ・シティ・オブ・ニューヨーク(The Trustees of Columbia University in the City of New York) The Trustees of Columbia University in the City of New York	passive	18.6M	¥232	-22.4%	¥4.3B ($27.8M)
2025-01-14	BUY	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	105.8M	¥189	-4.8%	¥20.0B ($129.0M)
2025-01-14	BUY	unknown	ジョセフ・アルトワッサー Joseph Altwasser	other	116.2K	¥189	-4.8%	¥22M ($142K)
2025-01-14	BUY	unknown	細野敏 Satoshi Hosono	other	85.6K	¥189	-4.8%	¥16M ($104K)
2025-01-14	BUY	unknown	橋本龍太朗 Ryutaro Hashimoto	other	214.2K	¥189	-4.8%	¥40M ($261K)
2025-01-14	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.1M	¥189	-4.8%	¥405M ($2.6M)
2025-01-14	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.1M	¥189	-4.8%	¥405M ($2.6M)
2025-01-14	BUY	unknown	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	105.8M	¥189	-4.8%	¥20.0B ($129.0M)
2025-01-14	BUY	unknown	辻川高寛 Takahiro Tsujikawa	other	62.4K	¥189	-4.8%	¥12M ($76K)
2025-01-14	BUY	unknown	田口洋平 Yohei Taguchi	other	34.8K	¥189	-4.8%	¥7M ($42K)
2025-01-14	BUY	unknown	梅木篤郎 Atsuro Umeki	other	46.4K	¥189	-4.8%	¥9M ($57K)
2025-01-14	BUY	unknown	ジョセフ・アルトワッサー Joseph Altwasser	other	116.2K	¥189	-4.8%	¥22M ($142K)
2025-01-14	BUY	unknown	細野敏 Satoshi Hosono	other	85.6K	¥189	-4.8%	¥16M ($104K)
2025-01-14	BUY	unknown	橋本龍太朗 Ryutaro Hashimoto	other	214.2K	¥189	-4.8%	¥40M ($261K)
2025-01-14	BUY	unknown	タロウ・マスヤマ Taro Masuyama	other	2.1M	¥189	-4.8%	¥405M ($2.6M)
2025-01-14	BUY	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.1M	¥189	-4.8%	¥405M ($2.6M)
2025-01-14	BUY	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	89.4M	¥189	-4.8%	¥16.9B ($109.0M)
2025-01-14	BUY	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	89.4M	¥189	-4.8%	¥16.9B ($109.0M)
2025-01-14	BUY	unknown	辻川高寛 Takahiro Tsujikawa	other	62.4K	¥189	-4.8%	¥12M ($76K)
2025-01-14	BUY	unknown	田口洋平 Yohei Taguchi	other	34.8K	¥189	-4.8%	¥7M ($42K)
2025-01-14	BUY	unknown	梅木篤郎 Atsuro Umeki	other	46.4K	¥189	-4.8%	¥9M ($57K)
2025-01-10	SELL	Market Buy	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	89.4M	¥190	+5.3%	¥15.4B ($99.7M)
2025-01-10	SELL	unknown	エスエーオー・スリー・ジーピー・リミテッド SAO III GP Ltd.	activist	89.4M	¥190	+5.3%	¥15.4B ($99.7M)
2025-01-10	SELL	unknown	橋本龍太朗 Ryutaro Hashimoto	other	214.2K	¥190	+5.3%	¥3.6B ($22.9M)
2025-01-10	SELL	unknown	タロウ・マスヤマ Taro Masuyama	other	2.1M	¥190	+5.3%	¥360M ($2.3M)
2025-01-10	SELL	unknown	マルコム・エフ・マクリーン4世 Malcolm F. MacLean IV	other	2.1M	¥190	+5.3%	¥360M ($2.3M)
2025-01-10	BUY	Market Buy	スターアジア・パートナーズ・シックス・リミテッド Star Asia Partners VI Ltd.	activist	105.8M	¥190	-5.3%	¥20.1B ($129.7M)
2025-01-10	BUY	Market Buy	辻川高寛 Takahiro Tsujikawa	other	62.4K	¥190	-5.3%	¥12M ($76K)

Showing the 50 most recent of 158 filings.

Frequently asked questions

Who has been buying Polaris Holdings Co., Ltd. stock?: 19 distinct investors have filed 18 disclosed large-shareholding filings in Polaris Holdings Co., Ltd. (3010), most recently on 2026-04-30. 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 Polaris Holdings Co., Ltd. have?: Polaris Holdings Co., Ltd. has 18 buy-side and 59 sell-side disclosures on record, covering ¥18.8B ($121.3M) in total reported value, spanning 2021-06-03 to 2026-04-30.
Where does StockDrifts get Polaris Holdings Co., Ltd. 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 Polaris Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.