ONESPAWORLD HOLDINGS Ltd

Since you owned OneSpaWorld voting common shares at the close of business on April 16, 2024 (the “Record Date”), you are considered a shareholder entitled to vote at the Annual Meeting. The Annual Meeting will be held in the Library Room, located at The Island House, Mahogany Hill, Western Road, Nassau, Bahamas, on Wednesday, June 5, 2024 at 11:00 a.m., Eastern Daylight Time.

The proxy materials, including the Proxy Statement, proxy card, and the 2023 Annual Report will be mailed to our shareholders of record on or about April 25, 2024.

The proxy materials include:

If you share an address with another shareholder, you may receive only one set of proxy materials unless you have provided contrary instructions. If you wish to receive a separate set of proxy materials, prior to May 22, 2024, please request an additional copy by (1) visitingwww.proxyvote.com, (2) calling 1-800-690-6903 or (3) sending an email to sendmaterial@proxyvote.com. A separate set of the proxy materials will be sent promptly following receipt of your request.

If you are a shareholder of record or a beneficial owner of shares and you wish to receive a separate set of proxy materials in the future, or if you have received multiple sets of proxy materials and would like to receive only one set of proxy materials in the future, please call your broker, bank or other agent and our investor relations department.

Shareholders may also write to us at the address below to request a separate copy of the proxy materials:

OneSpaWorld Holdings Limited

c/o One Spa World LLC

770 South Dixie Highway, Suite 200

Coral Gables, Florida 33146

Attn: Inga A. Fyodorova, Secretary

OneSpaWorld is making this solicitation and will pay the entire cost of preparing, assembling, printing, mailing and distributing these proxy materials and of soliciting any proxies. We do not use a third-party solicitor.

Our Board of Directors, officers and employees may also solicit proxies in person, by telephone or by electronic communication. They will not receive any additional compensation for these activities.

We will reimburse brokers, banks and other nominees, fiduciaries and custodians who nominally hold shares of our common shares as of the Record Date for the reasonable costs they incur furnishing proxy solicitation and other required Annual Meeting materials to street-name holders who beneficially own those shares on the Record Date.