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Form SCHEDULE 13D/A Osisko Development Corp. Filed by: Double Zero Capital, LP

May 28, 2026 9:56 PM





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




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SCHEDULE 13D




Comment for Type of Reporting Person:
Double Zero Capital, LP ("Double Zero") is the beneficial owner of (i) 48,591,775 common shares, no par value, of the Issuer (the "Shares") held directly by Double Zero and (ii) 18,300,000 Shares issuable upon the exercise of warrants to purchase Shares (the "Warrants") directly held by Double Zero, which are subject to the Beneficial Ownership Blocker (as defined below). Pursuant to an agreement between Double Zero and the Issuer (the "Blocker Agreement"), Double Zero will not be entitled to exercise the Warrants or other convertible securities previously or subsequently acquired by Double Zero to the extent that, as a result of such exercise, the number of Shares held by Double Zero will equal or exceed 19.9% of the then-outstanding Shares of the Issuer (the "Beneficial Ownership Blocker"). The 63,632,697 Shares reported as beneficially owned by Double Zero in this Schedule 13D represent the Shares held directly by Double Zero and 15,040,922 Shares that could be issued to Double Zero upon exercise of certain Warrants under the Beneficial Ownership Blocker. Percentage based on (i) 304,721,378 Shares outstanding as of May 11, 2026, as reported by the Issuer in its Notice of Annual and Special Meeting of Shareholders, an exhibit to the Form 6-K filed by the Issuer with the Securities and Exchange Commission on May 20, 2026 (the "Form 6-K"), plus (ii) 15,040,922 Shares issuable upon exercise of certain Warrants, which due to the Beneficial Ownership Blocker is the maximum number of Shares that could be issued upon exercise of the Warrants.


SCHEDULE 13D




Comment for Type of Reporting Person:
Brand Name GP, LLC ("Brand Name GP") may be deemed the beneficial owner of (i) 48,591,775 Shares owned by Double Zero and (ii) 18,300,000 Shares issuable to Double Zero upon the exercise of the Warrants, which are subject to the Beneficial Ownership Blocker. Pursuant to the Blocker Agreement, Double Zero will not be entitled to exercise the Warrants or other convertible securities previously or subsequently acquired by Double Zero to the extent that the Beneficial Ownership Blocker applies. The 63,632,697 Shares reported as beneficially owned by Brand Name GP in this Schedule 13D represent the Shares held directly by Double Zero and 15,040,922 Shares that could be issued to Double Zero upon exercise of certain Warrants under the Beneficial Ownership Blocker. The reported securities may be deemed beneficially owned by Brand Name GP as the general partner of Double Zero. Brand Name GP disclaims beneficial ownership of the reported securities, except to the extent of its pecuniary interest in such securities, if any. Percentage based on: (i) 304,721,378 Shares outstanding as of May 11, 2026, as reported by the Issuer in the Form 6-K, plus (ii) 15,040,922 Shares issuable upon exercise of certain Warrants, which due to the Beneficial Ownership Blocker is the maximum number of Shares that could be issued upon exercise of the Warrants.


SCHEDULE 13D




Comment for Type of Reporting Person:
Wen Hou may be deemed the beneficial owner of (i) 48,591,775 Shares owned by Double Zero and (ii) 18,300,000 Shares issuable to Double Zero upon the exercise of the Warrants, which are subject to the Beneficial Ownership Blocker. Pursuant to the Blocker Agreement, Double Zero will not be entitled to exercise the Warrants or other convertible securities previously or subsequently acquired by Double Zero to the extent that the Beneficial Ownership Blocker applies. The 63,632,697 Shares reported as beneficially owned by Mr. Hou in this Schedule 13D represent the Shares held directly by Double Zero and 15,040,922 Shares that could be issued to Double Zero upon exercise of certain Warrants under the Beneficial Ownership Blocker. The reported securities may be deemed beneficially owned by Mr. Hou as the principal of Brand Name GP, the general partner of Double Zero. Mr. Hou disclaims beneficial ownership of the reported securities, except to the extent of his pecuniary interest in such securities, if any. Percentage based on: (i) 304,721,378 Shares outstanding as of May 11, 2026, as reported by the Issuer in the Form 6-K, plus (ii) 15,040,922 Shares issuable upon exercise of certain Warrants, which due to the Beneficial Ownership Blocker is the maximum number of Shares that could be issued upon exercise of the Warrants.


SCHEDULE 13D


Double Zero Capital, LP
Signature:/s/ Wen Hou
Name/Title:Manager of Brand Name GP, LLC, manager of Double Zero Capital, LP
Date:05/28/2026
Brand Name GP, LLC
Signature:/s/ Wen Hou
Name/Title:Manager
Date:05/28/2026
Wen Hou
Signature:/s/ Wen Hou
Name/Title:Wen Hou
Date:05/28/2026

ATTACHMENTS / EXHIBITS

EXHIBIT 99.5

Categories

SEC Filings