{
  "schema_version": "1.0.0",
  "ticker": "NXG",
  "company_name": "NexGen Energy Ltd.",
  "cutoff_date": "2026-10-31",
  "reviewed_at": "2026-10-31",
  "coverage_note": "No complete dated register or top-20 was located. Three US SEC Schedule 13G reports and the issuer’s 11 May 2026 Canadian circular provide a partial, historical view of common shares underlying the ASX CDIs.",
  "register": null,
  "substantial_holders": [
    {
      "holder_id": "global-x",
      "name": "Global X Management Company LLC",
      "classification": "reporting_group",
      "shares": 42608181,
      "percentage": 6.46,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-03-31",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "globalx-2026"
      ],
      "notes": [
        "SEC 13G/A reports beneficial ownership and sole voting and disposition powers; Global X Uranium ETF has an economic interest within the reported group."
      ]
    },
    {
      "holder_id": "l1",
      "name": "L1 Capital Pty Ltd",
      "classification": "reporting_group",
      "shares": 38278197,
      "percentage": 5.7909,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-03-31",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "l1-2026"
      ],
      "notes": [
        "SEC 13G reports the relevant interest of multiple managed L1 funds; do not add those funds to this row."
      ]
    },
    {
      "holder_id": "van-eck",
      "name": "Van Eck Associates Corporation",
      "classification": "reporting_group",
      "shares": 31200836,
      "percentage": 5.13,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-03-31",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "vaneck-2026"
      ],
      "notes": [
        "SEC 13G reports 31,200,836 shares and 5.13% for 31 March 2026; the percentage is the filer’s, and its denominator was not established."
      ],
      "caveat": "The filing’s reported percentage does not reconcile to the nearby May 2026 issued-share count; denominator or basis differences remain unresolved."
    }
  ],
  "other_investors": [
    {
      "holder_id": "mega-uranium",
      "name": "Mega Uranium Ltd.",
      "classification": "reporting_group",
      "shares": 19476265,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Issuer reports 19,476,265 common shares and identifies Richard Patricio as its chief executive; do not add to Patricio’s separate row."
      ]
    },
    {
      "holder_id": "leigh-curyer",
      "name": "Leigh Curyer",
      "classification": "direct_holder",
      "shares": 6250000,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; excludes 15,850,000 options."
      ]
    },
    {
      "holder_id": "christopher-mcfadden",
      "name": "Christopher McFadden",
      "classification": "direct_holder",
      "shares": 1065000,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; options excluded."
      ]
    },
    {
      "holder_id": "richard-patricio",
      "name": "Richard Patricio",
      "classification": "direct_holder",
      "shares": 1669900,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; Mega Uranium’s shares are separately reported and not included."
      ]
    },
    {
      "holder_id": "warren-gilman",
      "name": "Warren Gilman",
      "classification": "direct_holder",
      "shares": 1700000,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; options excluded."
      ]
    },
    {
      "holder_id": "sybil-veenman",
      "name": "Sybil Veenman",
      "classification": "direct_holder",
      "shares": 839374,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; options excluded."
      ]
    },
    {
      "holder_id": "karri-howlett",
      "name": "Karri Howlett",
      "classification": "direct_holder",
      "shares": 750125,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; options excluded."
      ]
    },
    {
      "holder_id": "brad-wall",
      "name": "Brad Wall",
      "classification": "direct_holder",
      "shares": 326000,
      "percentage": null,
      "percentage_basis": "issued_shares",
      "as_of_date": "2026-05-11",
      "investor_id": null,
      "identity_note": null,
      "source_ids": [
        "circular-2026"
      ],
      "notes": [
        "Director profile common shares; options excluded."
      ]
    }
  ],
  "sources": [
    {
      "source_id": "circular-2026",
      "title": "2026 management information circular",
      "publisher": "NexGen Energy / ASX",
      "url": "https://asx.api.markitdigital.com/asx-research/1.0/file/2924-03092727-6A1326532",
      "publication_date": "2026-05-22",
      "accessed_date": "2026-10-31",
      "locator": "Pages 33, 36, 42–50; local downloads/NXG/2026/2026-05-22_Management Information Circular - 2026 AGM_b4cdeed4a0f208ad.pdf",
      "detail": "Information as at 11 May unless otherwise stated; director profiles, Mega Uranium, 661,909,421 issued shares, and no shareholder known to directors to control 10% or more."
    },
    {
      "source_id": "globalx-2026",
      "title": "Global X Schedule 13G/A",
      "publisher": "US SEC / Global X",
      "url": "https://www.sec.gov/Archives/edgar/data/1698535/000090514826002483/xslSCHEDULE_13G_X02/primary_doc.xml",
      "publication_date": "2026-05-15",
      "accessed_date": "2026-10-31",
      "locator": "Cover and Item 6",
      "detail": "42,608,181 common shares and 6.46% on 31 March 2026."
    },
    {
      "source_id": "l1-2026",
      "title": "L1 Capital Schedule 13G",
      "publisher": "US SEC / L1 Capital",
      "url": "https://www.sec.gov/Archives/edgar/data/1698535/000181764626000009/xslSCHEDULE_13G_X02/primary_doc.xml",
      "publication_date": "2026-05-14",
      "accessed_date": "2026-10-31",
      "locator": "Cover and Item 6",
      "detail": "38,278,197 common shares and 5.7909% on 31 March 2026."
    },
    {
      "source_id": "vaneck-2026",
      "title": "Van Eck Schedule 13G",
      "publisher": "US SEC / Van Eck",
      "url": "https://www.sec.gov/Archives/edgar/data/1698535/000086917826000057/xslSCHEDULE_13G_X02/primary_doc.xml",
      "publication_date": "2026-05-15",
      "accessed_date": "2026-10-31",
      "locator": "Cover and Item 4",
      "detail": "31,200,836 common shares and 5.13% as reported on 31 March 2026."
    }
  ],
  "limitations": [
    "No complete dated registered-holder or top-20 list was located. ASX CDIs represent common shares held by CHESS Depositary Nominees or a custodian; CDI accounts must not be mistaken for all global beneficial owners.",
    "Issuer circular information is generally as at 11 May 2026 and reports no 10% holder to the knowledge of directors and executives; this does not mean that no shareholders own 5% or more.",
    "Van Eck disclosed 31,200,836 shares and 5.13% as of 31 March 2026; its percentage does not reconcile to issuer’s 661,909,421 shares outstanding on 11 May 2026. Different dates, denominators or filing basis may contribute; the cause was not established.",
    "Reported manager interests may overlap funds and should not be added to related fund stakes. None of the historical figures should be presented as current.",
    "The 2026 circular reports Mega Uranium and director holdings but does not disclose a full beneficial ownership list. Director options are excluded from shares.",
    "The February 2026 Barclays 13G/A reports less than 5% as of December 2025; its exact primary filing was not verified and no current Barclays position is asserted."
  ]
}