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Acadian Asset Management Inc. — Investor Relations & Filings

Ticker · AAMI ISIN · US10948W1036 LEI · RQTOM0CI0L1JQEIRRN40 US Financial and insurance activities
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Filings indexed 722 across all filing types
Latest filing 2026-05-21 Major Shareholding Noti…
Country US United States of America
Listing US AAMI

About Acadian Asset Management Inc.

https://www.acadian-inc.com/

Acadian Asset Management is a global, quantitative investment management firm that serves institutional investors worldwide. Founded in 1986, the company specializes in systematic investment strategies, applying data and technology to the evaluation of global investments. Its approach is designed to identify market inefficiencies and generate risk-adjusted returns. The firm offers a diversified array of strategies across multiple asset classes, including equities, alternatives, and fixed income. Acadian leverages data-driven insights and a large investment team to manage its portfolios and help clients achieve their long-term objectives.

Recent filings

Filing Released Lang Actions
Form 8.3 - AMG CRITICAL MATERIALS NV
Major Shareholding Notification Classification · 96% confidence The document is a UK RNS Form 8.3 “Public Opening Position Disclosure/Dealing Disclosure” under Rule 8.3 of the Takeover Code. It discloses an asset manager’s holdings (>1% threshold) and a small purchase in securities. This is not a corporate report, earnings release, or director insider trade but a notification of a major shareholding position/disclosure. It matches Major Shareholding Notification.
2026-05-21 English
Form 8.3 AMG CRITICAL MATERIALS NV
Major Shareholding Notification Classification · 87% confidence The document is Form 8.3 under the UK Takeover Code, disclosing a >1% opening position and subsequent dealing by Acadian Asset Management LLC in the shares of AMG Critical Materials N.V. This is a major shareholding notification rather than a company report, director’s dealing or buy-back. It falls under changes in significant share ownership crossing thresholds (major shareholding notification).
2026-05-20 English
Form 8.3 AMG CRITICAL MATERIALS NV
Major Shareholding Notification Classification · 90% confidence The document is a Form 8.3 “Public Opening Position Disclosure/Dealing Disclosure by a person with interests in relevant securities representing 1% or more” filed under Rule 8.3 of the UK Takeover Code and distributed via RNS. It details a fund’s crossing and disclosure of a 1%+ shareholding and related transactions. This matches a Major Shareholding Notification (major share ownership threshold crossing), code MRQ.
2026-05-19 English
8-K
Regulatory Filings
2026-05-19 English
Form 8.3 AMG Critical Materials N.V.
Major Shareholding Notification Classification · 93% confidence The document is a Form 8.3 “Public Opening Position Disclosure/Dealing Disclosure” under Rule 8.3 of the UK Takeover Code, showing Acadian Asset Management LLC’s new stake of 2.54% (crossing the 1% threshold) and detailing related transactions. This is a notification of change in significant share ownership levels, fitting the “Major Shareholding Notification” category.
2026-05-18 English
Form 8.3 - AFENTRA PLC
Major Shareholding Notification Classification · 91% confidence The document is an RNS Form 8.3 takeover Code public opening position disclosure by Acadian Asset Management, detailing its interests and dealings in Afentra plc shares (over 1%). It is a notification of a significant shareholding interest (crossing relevant thresholds). This aligns with “Major Shareholding Notification” (MRQ).
2026-05-13 English

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