Osisko Development (ODV) sets June 23, 2026 annual and special meeting

Rhea-AI Filing Summary

Osisko Development Corp. has set key dates for its upcoming Annual and Special Meeting of Security Holders. The meeting is scheduled for June 23, 2026, with a record date of May 11, 2026 for notice, voting, and beneficial ownership determination.

Holders of common shares are entitled to receive notice of the meeting and to vote. The company will use Notice-and-Access for both registered shareholders and beneficial holders, and proxy-related materials will be sent directly to Non-Objecting Beneficial Owners, with the issuer paying for delivery to Objecting Beneficial Owners.

Key Figures

Meeting date: June 23, 2026 Record date for notice: May 11, 2026 Record date for voting: May 11, 2026 +1 more

4 metrics

Meeting date June 23, 2026 Date fixed for the Annual and Special Meeting of Security Holders

Record date for notice May 11, 2026 Record date for notice of the meeting

Record date for voting May 11, 2026 Record date determining voting entitlement

Beneficial ownership determination date May 11, 2026 Date used to determine beneficial owners eligible for the meeting

Key Terms

Annual and Special Meeting of Security Holders, Notice-and-Access, Non-Objecting Beneficial Owners, Objecting Beneficial Owners, +1 more

5 terms

Annual and Special Meeting of Security Holders financial

"upcoming Annual and Special Meeting of Security Holders for the subject issuer"

Notice-and-Access regulatory

"Notice-and-Access: Registered Shareholders: YES Beneficial Holders: YES"

A notice-and-access delivery model sends shareholders a short notice telling them where to find full proxy materials and other corporate documents online instead of receiving bulky paper copies by mail. For investors it matters because it speeds delivery and cuts costs for companies, but also shifts responsibility onto shareholders to retrieve and read the materials before voting or making decisions—like getting a postcard with a link to the full report rather than the report itself.

Non-Objecting Beneficial Owners regulatory

"Reporting issuer is sending proxy-related materials directly to Non-Objecting Beneficial Owners: YES"

Non-objecting beneficial owners are individual or institutional shareholders who hold stock through a broker or bank and have allowed that intermediary to share their name and contact details with the company that issued the shares. This matters to investors because it lets companies contact those shareholders directly about votes, proxy materials, tender offers or corporate updates, which can speed communication and influence participation much like a sender getting permission to mail you directly rather than through a forwarding service.

Objecting Beneficial Owners regulatory

"Issuer paying for delivery to Objecting Beneficial Owners: YES"

beneficial ownership determination date financial

"Beneficial Ownership Determination Date: May 11, 2026"

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

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

THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 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. Notice of Record and Meeting Dates – dated April 27, 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: April 27, 2026	/s/ Laurence Farmer
	Laurence Farmer
	General Counsel and Vice President Strategic Development

Exhibit 99.1

TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

April 27, 2026

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE:	OSISKO DEVELOPMENT CORP.
	Confirmation of Notice of Record and Meeting Dates

We are pleased to confirm that the Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities.

We advise the following with respect to the upcoming Annual and Special Meeting of Security Holders for the subject issuer:

1	ISIN:	CA68828E8099
	CUSIP:	68828E809
2	Date Fixed for the Meeting:	June 23, 2026
3	Record Date for Notice:	May 11, 2026
4	Record Date for Voting:	May 11, 2026
5	Beneficial Ownership Determination Date:	May 11, 2026
6	Classes or Series of Securities that entitle the holder to receive Notice of the Meeting:	COMMON SHARES
7	Classes or Series of Securities that entitle the holder to vote at the meeting:	COMMON SHARES
8	Business to be conducted at the meeting:	Annual and Special
9	Notice-and-Access:
	Registered Shareholders:	YES
	Beneficial Holders:	YES
	Stratification Level:	Not Applicable
10	Reporting issuer is sending proxy-related materials directly to Non-Objecting Beneficial Owners:	YES
11	Issuer paying for delivery to Objecting Beneficial Owners:	YES

Yours truly,

TSX Trust Company

VANCOUVER	CALGARY	TORONTO	MONTRÉAL
733 Seymour Street,	Telus Sky Building	301 - 100 Adelaide Street West	1701 - 1190, avenue des
Suite #2310	2110, 685 Centre Street SW	Toronto ON M5H 4H1	Canadiens-de-Montréal, C. P. 37
Vancouver, BC V6B 0S6	Calgary Alberta T2G 1S5	Toll Free 1-866-600-5869	Montréal (Québec) H3B 0G7
T 604 689-3334	T 403 218-2800		T 416 361-0930	T 514 395-5964

FAQ

When is Osisko Development (ODV) holding its 2026 annual and special meeting?

Osisko Development will hold its Annual and Special Meeting of Security Holders on June 23, 2026. This meeting covers the company’s annual business and special items, giving common shareholders an opportunity to exercise their voting rights on key corporate matters.

What is the record date for voting at Osisko Development (ODV)’s 2026 meeting?

The record date for voting at Osisko Development’s 2026 Annual and Special Meeting is May 11, 2026. Shareholders who hold common shares on that date will be entitled to vote on the business presented at the meeting.

Which Osisko Development (ODV) security holders can receive notice and vote at the 2026 meeting?

Holders of common shares of Osisko Development are entitled to both receive notice of the meeting and vote. The filing specifies that the class of securities for notice and for voting at the Annual and Special Meeting is common shares only.

Is Osisko Development (ODV) using Notice-and-Access for its 2026 meeting materials?

Yes. The company is using Notice-and-Access for both registered shareholders and beneficial holders. This means proxy-related information is provided electronically, with stratification noted as not applicable, streamlining delivery of meeting materials to all eligible holders.

How is Osisko Development (ODV) handling proxy materials for beneficial owners?

Osisko Development will send proxy-related materials directly to Non-Objecting Beneficial Owners and will pay for delivery of such materials to Objecting Beneficial Owners. This ensures both categories of beneficial holders receive the information needed for the 2026 meeting.

What is the beneficial ownership determination date for Osisko Development (ODV)’s 2026 meeting?

The beneficial ownership determination date is May 11, 2026. This date is used to determine which beneficial holders of Osisko Development common shares are entitled to receive notice and vote at the June 23, 2026 Annual and Special Meeting.

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 EXHIBIT 99.1 15.7 KB