As of October 30, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Osisko Development Corp. The largest reported stake is Double Zero Capital, LP's, at 19.9%. 3 filings are on record since August 19, 2025 (Schedule 13D/A, May 28, 2026).
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Key facts
- · Reporting person: Double Zero Capital, LP · Sole voting: 0 · Shared voting: 63,632,697 · Sole dispositive: 0 · Shared dispositive: 63,632,697 · SCHEDULE 13D/A, 2026-05-28
- · Holder: Double Zero Capital, LP · Percent: 19.9% · SCHEDULE 13D
- · Reporting person: Condire Management, LP · Sole voting: 0 · Shared voting: 23,879,902 · Sole dispositive: 0 · Shared dispositive: 23,879,902 · SCHEDULE 13D/A, 2025-08-19
Osisko Development Corp. has 3 Schedule 13D or 13G filings on record since 2025-08-19. 2 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 |
|---|---|---|---|---|
| Double Zero Capital, LP | 19.9% | 63,632,697 | SCHEDULE 13D/A, 2026-05-28 | 2026-05-26 |
| Condire Management, LP | 9.9% | 23,879,902 | SCHEDULE 13D/A, 2025-08-19 | 2025-08-15 |
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What the Full Report on Osisko Development Corp. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Double Zero Capital, LP | 0 | 63,632,697 | 0 | 63,632,697 | SCHEDULE 13D/A, 2026-05-28 |
| Brand Name GP, LLC | 0 | 63,632,697 | 0 | 63,632,697 | SCHEDULE 13D/A, 2026-05-28 |
| Wen Hou | 0 | 63,632,697 | 0 | 63,632,697 | SCHEDULE 13D/A, 2026-05-28 |
| Condire Management, LP | 0 | 23,879,902 | 0 | 23,879,902 | SCHEDULE 13D/A, 2025-08-19 |
| Condire Management GP Holdings, LLC | 0 | 23,879,902 | 0 | 23,879,902 | SCHEDULE 13D/A, 2025-08-19 |
| Ryan E. Schedler | 0 | 23,879,902 | 0 | 23,879,902 | SCHEDULE 13D/A, 2025-08-19 |
| Bradley J. Shisler | 0 | 23,879,902 | 0 | 23,879,902 | SCHEDULE 13D/A, 2025-08-19 |
The latest filing identifies Osisko Development Corp. by CUSIP 68828E809 and gives its principal executive office as 1100 Avenue des Canadiens-de-Montreal, Suite 300, Montreal (SCHEDULE 13D/A, 2026-05-28).
Source of funds (Item 3)
On August 15, 2025, Condire Alpha acquired 622,382 units (each, a "Unit") subject to a 4-month and one day hold period pursuant to applicable Canadian securities laws as part of a "bought deal" brokered private placement (the "Brokered Offering") at a price per Unit of $2.05 for an aggregate purchase price of $1,275,883.Condire Management, LP, SCHEDULE 13D/A, 2025-08-19
Purpose of Transaction (Item 4)
Condire Management, LP
The securities covered by this Schedule 13D were acquired for investment purposes. The Reporting Persons have no present plans or proposals that relate to, or that would result in, any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. The Reporting Persons retain the right to change their investment intent, and may, from time to time, acquire additional Shares or other securities of the Issuer, or sell or otherwise dispose of (or enter into plans or arrangements to sell or otherwise dispose of), all or part of the Shares or other securities of the Issuer, if any, beneficially owned by them, in any manner permitted by law.Item 4 of the SCHEDULE 13D/A filed 2025-08-19
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-19 | Condire Management, LP | 9.9% | SCHEDULE 13D/A |
| 2025-08-28 | Double Zero Capital, LP | 19.9% | SCHEDULE 13D |
| 2026-05-28 | Double Zero Capital, LP | 19.9% | SCHEDULE 13D/A |
Questions about who owns Osisko Development Corp.
Who owns Osisko Development Corp.?
On this page, 2 holders' latest ownership filings report 5% or more of Osisko Development Corp.: Double Zero Capital, LP (19.9%, Schedule 13D/A, filed 2026-05-28) and Condire Management, LP (9.9%, Schedule 13D/A, filed 2025-08-19).
Who are the largest shareholders of Osisko Development Corp.?
By the share each holder's latest filing reports, the largest holders of Osisko Development Corp. on this page are Double Zero Capital, LP (19.9%) and Condire Management, LP (9.9%).
When did Double Zero Capital, LP buy into Osisko Development Corp.?
The filings give report dates, not purchase dates. The earliest filing from Double Zero Capital, LP on this page is the Schedule 13D, filed 2025-08-28, reporting 19.9%; its latest, Schedule 13D/A filed 2026-05-28, reports 19.9%.
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%); 3 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.
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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.