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Tools · FilingsUpdated with new filings

Japan Activist & 5% Ownership Stakes

Disclosed stakes above 5%, with activist groups and ownership changes.

Data through · Updated with new filings

0

new stakes above 5% filed in the past week

The largest move was Columbia Management Investment Advisers, LLC in Rigaku Holdings, +1.09 pp.

3 rows match “268A” · Clear · Go to Rigaku Holdings (268A) →

Data coverage and sources

Shows 3 of 3 filings.

Curated engagement groups match legal filer codes. Affiliated filers count once per issuer, using the largest disclosed stake. A filing does not imply an active campaign.

Dates select original filings, with retained later corrections applied.

CSV contains accepted filings in this selection, including original text and separate English display fields. Source ratios and percent fields retain their own units.

English prose ready for 1 / 3 filings. Unverified names use source identities; originals remain available.

Displayed filings since 28 Oct 2024

Latest disclosed stakes within the selected filing window; this is not a complete ownership book. Filed changes can lag trades. A stake is the holding ratio as filed under the large-shareholding rules and includes potential shares underlying instruments such as warrants.

This week's 5% crossings

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No stored data for this selection.

Largest moves

3
Largest moves
CompanyHolderStakeChangePurposeFiling
Rigaku Holdings268A · リガク・ホールディングスColumbia Management Investment Advisers, LLC11.48% own · 11.85% group of 2+1.09 ppAsset manager / trust投資一任契約に基づく純投資Filed  — filing S100Z15M
Rigaku Holdings268A · リガク・ホールディングスオントゥ・イノベーション・インク0.00% own · 26.98% group of 2−0.02 ppBusiness relationship
Japanese text令和8年9月29日付で、提出者2は、提出者1との間で加入契約(以下「本加入契約」といいます。)を締結し、これに基づき、発行者の同意を得て、提出者1及び発行者の間で締結された令和8年4月21日付資本業務提携契約(以下「本資本業務提携契約」といいます。)に加入しました。本加入契約に基づき、提出者2は、提出者1と同一の立場で、本資本業務提携契約の各条項に従うことに同意しています。提出者2は、本資本業務提携契約に基づく発行者との資本業務提携の維持を目的として株式を保有しています。提出者1及びAtom Investment, L.P.(以下「売主」といいます。)の間で締結した令和8年4月21日付株式譲渡契約(以下「本株式譲渡契約」といいます。)に基づき、売主が発行者の普通株式61,123,436株を提出者1に売却し、提出者1がこれを購入しました。当該取引の完了日である令和8年8月10日(以下「クロー
Filed  — filing S100Z5ZP
Rigaku Holdings268A · リガク・ホールディングス志村 晶6.83% own · 12.13% group of 2+0.00 ppPure investmentPure investment
Original (Japanese)純投資
Filed  — filing S100Z9NW

Activist league

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Crowded names

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Exits below 5%

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