ODV 6-K 2026 - Equibles

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2026

Commission File Number: 001-41369

Osisko Development Corp.

(Translation of registrant’s name into English)

1100 Avenue des Canadiens-de-Montréal,Suite 300

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ¨ Form 40-F x

EXHIBIT INDEX

Exhibit

99.1		Osisko Development Corp. Report of Voting Results Pursuant to Section 11.3 of National Instrument 51 102 – Continuous Disclosure Obligations – dated June 23, 2026

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Osisko Development Corp.
	(Registrant)
Date: June 23, 2026	/s/ Laurence Farmer
	Laurence Farmer
	General Counsel and Vice President Strategic Development

Exhibit 99.1

OSISKO DEVELOPMENT CORP.

Report of Voting Results Pursuant to Section 11.3ofNational Instrument 51-102 – Continuous Disclosure Obligations

This report sets forth a brief description of each matter that was voted upon at the annual and special meeting of holders of common shares of Osisko Development Corp. (the “Company") held on June 23, 2026 (the “Meeting") and the outcome of the vote. Further information regarding the business of the Meeting is contained in the Company's management information circular dated May 11, 2026 (the “Circular"), which is available on SEDAR+ (www.sedarplus.ca) under the Company's issuer profile.

1.	Election of Directors

Each of the seven director nominees proposed by management were elected. Voting was conducted by ballot. The voting results were as follows:

Nominee	Votes For
Sean Roosen		202,062,275	98.91	%	2,234,846	1.09	%
Charles E. Page		172,497,611	84.44	%	31,799,510	15.56	%
Michèle McCarthy		171,284,316	83.84	%	33,012,804	16.16	%
David Danziger		169,832,493	83.13	%	34,464,628	16.87	%
Stephen Quin		203,529,000	99.62	%	768,121	0.38	%
Susan Craig		203,517,931	99.62	%	779,189	0.38	%
Keith McKay		203,583,947	99.65	%	713,174	0.35	%
2.	Appointment of Auditors
---	---

PricewaterhouseCoopers LLP was approved to serve as the auditor of the Company for 2026 and at a remuneration to be fixed by the board of directors. Voting was conducted by show of hands. The voting results were as follows:

Votes For
	225,812,331	99.90	%	219,606	0.10	%
3.	Registered Office Resolution
---	---

The special resolution (the full text of which is reproduced in the Circular) for the amendment to the Articles of the Company to change the province of the Company's registered office from the Province of Québec to the Province of Ontario was approved. Voting was conducted by show of hands. The voting results were as follows:

Votes For
	204,029,595	99.88	%	241,093	0.12	%
4.	Name Change Resolution
---	---

The special resolution (the full text of which is reproduced in the Circular) for the change of name of the Company from “Osisko Development Corp." to “Osisko Gold Group Inc." was approved. Voting was conducted by show of hands. The voting results were as follows:

Votes For		% of Votes For			Votes Against		% of Votes Against
	224,810,764		99.46	%		1,221,172		0.54	%

Dated at Toronto, Ontario, this 23^rd^ day of June 2026.