{ "schema_version": "1.0.0", "ticker": "AAI", "company_name": "Alcoa Corporation", "cutoff_date": "2026-10-31", "reviewed_at": "2026-10-31", "coverage_note": "No dated ranked register was located. The table contains independently dated U.S. Schedule 13G beneficial-ownership reports for common stock, including shares represented by CDIs; reports can overlap and are not a current ranked register.", "register": null, "substantial_holders": [ { "holder_id": "blackrock", "name": "BlackRock, Inc.", "classification": "reporting_group", "shares": 23391807, "percentage": 9.0, "percentage_basis": "issued_shares", "as_of_date": "2025-03-31", "investor_id": null, "identity_note": null, "source_ids": [ "blackrock-13ga" ], "notes": [ "The issuer-hosted 13G/A reports sole voting power over 22,553,029 shares and sole dispositive power over 23,391,807 shares.", "The issuer’s March 2026 proxy calculates 8.9% using a different, March 2026 share count; the 9.0% here is the original filing percentage." ], "caveat": "Position is dated March 2025 and may have changed." }, { "holder_id": "fmr", "name": "FMR LLC and Abigail P. Johnson", "classification": "reporting_group", "shares": null, "percentage": 6.4, "percentage_basis": "issued_shares", "as_of_date": "2026-06-30", "investor_id": null, "identity_note": null, "source_ids": [ "fmr-13g" ], "notes": [ "The joint filing reports 16,996,106.28 beneficially owned shares for each joint filer; the same position is not summed.", "The share field is blank because this dataset requires integer quantities; the filing includes a fractional share." ] }, { "holder_id": "vanguard-capital", "name": "Vanguard Capital Management LLC", "classification": "reporting_group", "shares": 14538713, "percentage": 5.5, "percentage_basis": "issued_shares", "as_of_date": "2026-03-31", "investor_id": null, "identity_note": null, "source_ids": [ "vanguard-capital-13g" ], "notes": [ "Filing reports 2,762,063 shares with sole voting power and 14,538,713 shares with sole dispositive power.", "The reporting unit describes affiliate and fund holdings; overlap with the separately reported Vanguard Portfolio Management position cannot be determined from these filings." ] }, { "holder_id": "vanguard-portfolio", "name": "Vanguard Portfolio Management LLC", "classification": "reporting_group", "shares": 13325566, "percentage": 5.04, "percentage_basis": "issued_shares", "as_of_date": "2026-09-30", "investor_id": null, "identity_note": null, "source_ids": [ "vanguard-portfolio-13g" ], "notes": [ "Filing reports 36,012 shares with sole voting power and 13,325,566 shares with sole dispositive power.", "This is a distinct reporting unit; overlap with Vanguard Capital Management cannot be determined from the filings." ], "caveat": "The latest filing was read from a full-text reproduction because the SEC document was inaccessible during review." } ], "sources": [ { "source_id": "blackrock-13ga", "title": "Schedule 13G/A: BlackRock, Inc.", "publisher": "BlackRock, Inc. / SEC, issuer-hosted copy", "url": "https://d18rn0p25nwr6d.cloudfront.net/CIK-0001675149/42135c88-9023-4b9f-b610-0936c1b5e44f.pdf", "publication_date": "2025-04-17", "accessed_date": "2026-10-31", "locator": "Cover page and item 4; event date 31 March 2025", "detail": "Beneficial ownership and filing percentage." }, { "source_id": "fmr-13g", "title": "Schedule 13G: FMR LLC and Abigail P. Johnson", "publisher": "FMR LLC / U.S. Securities and Exchange Commission", "url": "https://www.sec.gov/Archives/edgar/data/315066/000031506626001927/xslSCHEDULE_13G_X02/primary_doc.xml", "publication_date": "2026-08-06", "accessed_date": "2026-10-31", "locator": "Cover pages and item 4; event date 30 June 2026", "detail": "Joint beneficial ownership, fractional share count, and class percentage." }, { "source_id": "vanguard-capital-13g", "title": "Schedule 13G: Vanguard Capital Management", "publisher": "Vanguard Capital Management / U.S. Securities and Exchange Commission", "url": "https://www.sec.gov/Archives/edgar/data/1675149/000210011926000068/xslSCHEDULE_13G_X02/primary_doc.xml", "publication_date": "2026-04-29", "accessed_date": "2026-10-31", "locator": "Cover page and item 4; event date 31 March 2026", "detail": "Beneficial ownership of common stock and class percentage." }, { "source_id": "vanguard-portfolio-13g", "title": "Schedule 13G: Vanguard Portfolio Management", "publisher": "Vanguard Portfolio Management / SEC filing reproduced by StockTitan", "url": "https://www.stocktitan.net/sec-filings/AA/schedule-13g-alcoa-corp-passive-investment-disclosure-5-45b878a789ee.html", "publication_date": "2026-10-30", "accessed_date": "2026-10-31", "locator": "Full filing reproduction: cover and item 4; event date 30 September 2026", "detail": "Beneficial ownership of common stock and class percentage; SEC accession 0002100121-26-001027." }, { "source_id": "proxy-2026", "title": "2026 annual meeting proxy statement", "publisher": "Alcoa Corporation / U.S. Securities and Exchange Commission", "url": "https://www.sec.gov/Archives/edgar/data/1675149/000119312526115997/aa-20260319.htm", "publication_date": "2026-03-19", "accessed_date": "2026-10-31", "locator": "Page 76, Beneficial Ownership, common stock and footnotes", "detail": "Issuer proxy discloses substantial holders and states percentage denominator includes shares underlying CDIs." }, { "source_id": "eagle-13ga", "title": "Schedule 13G/A: Eagle Capital Management", "publisher": "Eagle Capital Management / U.S. Securities and Exchange Commission", "url": "https://www.sec.gov/Archives/edgar/data/945631/000117266126003736/primary_doc.xml", "publication_date": "2026-08-14", "accessed_date": "2026-10-31", "locator": "Item 4 and item 5; event date 30 June 2026", "detail": "Reports 11,879,807 shares and 4.5%; item 5 marks 5% or less; not assumed to be a zero position." } ], "limitations": [ "No coherent, dated top-20 registered-shareholder or CDI-holder table was located; register remains unavailable.", "U.S. beneficial-ownership notices give reporting-group authority, not a list of beneficial owners or direct CDI holders, and may overlap; do not sum them.", "Reported percentages and positions are historical, refer to different measurement dates, and are not a live ownership statement.", "Eagle Capital Management’s August 2026 notice reports 4.5% as of June 30 and is excluded from the substantial-holder table; cessation does not mean a zero holding.", "The October 30 Vanguard Portfolio filing was reviewed in a full-text reproduction; direct SEC document access was unavailable.", "The local ASX notice PDFs for 2025–2026 were image-based or used uninterpretable fonts; text extraction was insufficient to review them fully. The corresponding identified U.S. filings were checked where accessible, but comprehensive source coverage is not claimed.", "The BlackRock percentage shown is the 2025 filing’s 9.0%; Alcoa’s 2026 proxy computes 8.9% using the March 2026 outstanding-share count.", "South32 consideration shares in the proposed acquisition are conditional and are not included as existing holdings." ] }