Regulation FD Disclosure (Form 8-K)

Preliminary Redemption Results

On October 2, 2026, Oaktree Acquisition Corp. III Life Sciences ("OAC") filed a definitive proxy statement (the "Extension Proxy Statement") for an extraordinary general meeting in lieu of annual meeting of its shareholders to be held on October 16, 2026 to consider and act upon a proposal to extend (the "Extension") the date by which OAC must complete an initial business combination (a "Business Combination").

As set forth in the Extension Proxy Statement, the deadline by which OAC public shareholders had to complete the procedures for electing to redeem their Class A ordinary shares, par value $0.0001 per share, of OAC (the "Class A ordinary shares") was 5:00 p.m., Eastern Time, on October 14, 2026 (the "Redemption Deadline"). The number of Class A ordinary shares tendered for redemption prior to the Redemption Deadline was 13,326,977 Class A ordinary shares.

Assuming the redemption of 13,326,977 Class A ordinary shares and the Conversion (as defined below) of Class B ordinary shares, par value $0.0001 per share, of OAC (the "Class B ordinary shares"), as described in more detail below, OAC will have 11,254,791 Class A ordinary shares and 1,000 Class B ordinary shares issued and outstanding.

Shareholders may make a request to withdraw their redemption of Class A ordinary shares by contacting OAC's transfer agent, Continental Stock Transfer & Trust Company, at [email protected].

Class B ordinary share Conversion

Prior to the effectiveness of the Extension, Oaktree Acquisition Holdings III LS, LLC, a Cayman Islands limited liability company (the "Sponsor") intends to convert 4,798,758 Class B ordinary shares into 4,798,758 Class A ordinary shares (the "Conversion"), pursuant to Article 14 of OAC's amended and restated memorandum and articles of association (the "Memorandum and Articles of Association"), on a one-for-one basis. In accordance with Articles 17 and 19 thereof, the Conversion will be effected by the repurchase of such Class B ordinary shares and the application of the repurchase proceeds in paying up, at par, the Class A ordinary shares to be issued upon the Conversion. Following the Conversion, the Sponsor will hold 5,382,739 Class A ordinary shares (including 583,981 private placement shares included in the private placement units that the Sponsor purchased from OAC in connection with OAC's initial public offering) and 1,000 Class B ordinary shares.

The 4,798,758 Class A ordinary shares to be issued to the Sponsor upon the Conversion will be subject to the same restrictions as applied to the Class B ordinary shares before the Conversion, including, among other things, certain transfer restrictions, waiver of redemption rights and the obligation to vote in favor of a Business Combination as described in OAC's prospectus for its initial public offering. In accordance with Article 166 of the Memorandum and Articles of Association, the Sponsor has waived any right to receive funds from the Trust Account (as defined in the Extension Proxy Statement) in respect of such Class A ordinary shares. Such Class A ordinary shares will constitute Founder Shares (as defined in the Memorandum and Articles of Association) and will not be Public Shares, and accordingly (i) will not be entitled to be redeemed and (ii) will continue to carry the rights of Founder Shares under the Memorandum and Articles of Association prior to the closing of a Business Combination, including the right to vote on the appointment of directors and on any continuation of OAC outside the Cayman Islands. As the Class A ordinary shares and Class B ordinary shares vote together as a single class, the Conversion will not change the number of votes the Sponsor may cast at a shareholder meeting.

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