Mr. Graeme Jennings reports

IAMGOLD PROVIDES NOTICE OF FIRST QUARTER 2024 RESULTS AND CONFERENCE CALL

Iamgold Corp. plans to release its first quarter 2024 operating and financial results after market hours on Thursday, May 9, 2024. Senior management will host a conference call to discuss the operating performance and financial results on Friday, May 10, 2024, at 8:30 a.m. (Eastern Time).

Listeners may access the conference call via webcast from the events section of the company's website, or through the following options:

• Preregister on-line: Upon registering, you will receive a calendar booking by e-mail with dial-in details and unique PIN (personal identification number). This process will bypass the operator and avoid the queue.
• Toll-free (North America): 1-844-763-8274.
• International: 1-647-484-8814.
• Webcast: access on-line.

An on-line archive of the webcast will be available by accessing the company's website. A telephone replay will be available for one month following the call by dialling toll-free 1-855-669-9658 within North America or 1-604-674-8052 from international locations and entering the passcode 0811.

About Iamgold Corp.

Iamgold is an intermediate gold producer and developer based in Canada with operating mines in North America and West Africa. The company has commenced production at the large-scale, long-life Cote gold mine in partnership with Sumitomo Metal Mining Co. Ltd., which is expected to be among the largest gold mines in Canada. In addition, the company has an established portfolio of early-stage and advanced exploration projects within high-potential mining districts. Iamgold employs approximately 3,600 people and is committed to maintaining its culture of accountable mining through high standards of environmental, social and governance practices, including its commitment to zero harm, in every aspect of its business. Iamgold is listed on the New York Stock Exchange (IAG) and the Toronto Stock Exchange (IMG), and is one of the companies on the Jantzi Social Index, which is socially screened and market capitalization weighted, consisting of companies which pass a set of broadly based environmental, social and governance rating criteria.