As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Electra Battery Materials Corp. The largest reported stake is Highbridge Capital Management LLC's, at 9.9%. 18 filings are on record since July 24, 2025 (Schedule 13G, October 24, 2025).
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Key facts
- · Reporting person: Whitebox Advisors LLC · Sole voting: 0 · Shared voting: 10,825,279 · Sole dispositive: 0 · Shared dispositive: 10,825,279 · SCHEDULE 13G/A, 2026-08-14
- · Holder: Whitebox Advisors LLC · Percent: 9.9% · SCHEDULE 13G/A
- · Holder: OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) · Percent: 0% · SCHEDULE 13G/A
- · Holder: O'Connor Alternative Investments LLC · Percent: 9.9% · SCHEDULE 13G
- · Holder: Highbridge Capital Management LLC · Percent: 9.9% · SCHEDULE 13G
Electra Battery Materials Corp has 18 Schedule 13D or 13G filings on record since 2025-07-24. 3 holders' latest filing reports 5% or more of common shares, no par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Highbridge Capital Management LLC | 9.9% | 9,291,272 | SCHEDULE 13G, 2025-10-24 | 2025-10-22 |
| Whitebox Advisors LLC | 9.9% | 10,825,279 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| O'Connor Alternative Investments LLC | 9.9% | 9,278,996 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0% | 0 | SCHEDULE 13G/A, 2026-04-29 | 2026-03-31 |
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More on Electra Battery Materials Corp and the records around it.
Electra Battery Materials Corp elsewhere on the record
- Company profile and every filing Nov 2025
- Form D filing Nov 2025
- Who owns it
Companies that share a holder
- WHITEBOX ADVISORS LLC also filed stake reports on 9 other companies: KLX Energy Services Holdings, Inc. (Oct 2026), HORNBECK OFFSHORE SERVICES, INC. (Sep 2026), MERCER INTERNATIONAL INC. (Aug 2026)
- HIGHBRIDGE CAPITAL MANAGEMENT LLC also filed stake reports on 83 other companies: Aeon Acquisition I Corp. (Aug 2026), Alpex Acquisition Corp (Aug 2026), Aperture AC (Aug 2026)
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What the Full Report on Electra Battery Materials Corp covers
The Short Answer
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Whitebox Advisors LLC | 0 | 10,825,279 | 0 | 10,825,279 | SCHEDULE 13G/A, 2026-08-14 |
| Whitebox General Partner LLC | 0 | 10,825,279 | 0 | 10,825,279 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Electra Battery Materials Corp by CUSIP 28474P706 and gives its principal executive office as 133 Richmond Street West, Suite 602, Toronto (SCHEDULE 13G/A, 2026-08-14).
What the percentages are based on
As of June 30, 2026, each of WA and WGP is deemed to beneficially own 9.9% of the Common Shares outstanding.Whitebox Advisors LLC, SCHEDULE 13G/A, 2026-08-14
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-24 | Highbridge Capital Management, LLC | 9.9% | SCHEDULE 13D |
| 2025-07-24 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13D |
| 2025-07-25 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 4.9% | SCHEDULE 13D |
| 2025-08-25 | Highbridge Capital Management LLC | 9.9% | SCHEDULE 13D/A |
| 2025-08-25 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13D/A |
| 2025-08-25 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 4.9% | SCHEDULE 13D/A |
| 2025-09-18 | Highbridge Capital Management LLC | 9.9% | SCHEDULE 13D/A |
| 2025-09-18 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13D/A |
| 2025-09-18 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 4.9% | SCHEDULE 13D/A |
| 2025-10-24 | Highbridge Capital Management LLC | 9.9% | SCHEDULE 13G |
| 2025-10-24 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13D/A |
| 2025-10-24 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13G |
| 2025-10-24 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 9.9% | SCHEDULE 13D/A |
| 2025-10-24 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 9.9% | SCHEDULE 13G |
| 2026-04-29 | OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0% | SCHEDULE 13G/A |
| 2026-04-29 | O'Connor Alternative Investments LLC | 9.9% | SCHEDULE 13G |
| 2026-05-15 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13G/A |
| 2026-08-14 | Whitebox Advisors LLC | 9.9% | SCHEDULE 13G/A |
Questions about who owns Electra Battery Materials Corp
Who owns Electra Battery Materials Corp?
On this page, 3 holders' latest ownership filings report 5% or more of Electra Battery Materials Corp: Highbridge Capital Management LLC (9.9%, Schedule 13G, filed 2025-10-24), Whitebox Advisors LLC (9.9%, Schedule 13G/A, filed 2026-08-14) and O'Connor Alternative Investments LLC (9.9%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Electra Battery Materials Corp?
By the share each holder's latest filing reports, the largest holders of Electra Battery Materials Corp on this page are Highbridge Capital Management LLC (9.9%), Whitebox Advisors LLC (9.9%) and O'Connor Alternative Investments LLC (9.9%).
When did Highbridge Capital Management LLC buy into Electra Battery Materials Corp?
The filings give report dates, not purchase dates. The earliest filing from Highbridge Capital Management LLC on this page is the Schedule 13D/A, filed 2025-08-25, reporting 9.9%; its latest, Schedule 13G filed 2025-10-24, reports 9.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 18 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Electra Battery Materials Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| November 4, 2025 | Form D, private offering | $34.50M sold | Form D page | Source |
Electra Battery Materials Corp: every filing and event
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.