GILEAD SCIENCES, INC. → GALAPAGOS NV GLPGF

Item 4 is hereby amended and supplemented with the addition of the following: Separation Agreement On January 7, 2025, the Issuer and the Reporting Persons entered into the Separation Agreement, pursuant to which and subject to the terms and conditions set forth therein, the Issuer shall separate certain assets and liabilities into a new entity ("SpinCo") through a partial demerger in the sense of Article 12:8, 1deg of the Belgian Companies and Associations Code ("een met splitsinggelijkgesteldeverrichting / uneoperationassimilee a la scission"), following which the existing shareholders of the Issuer shall receive shares in SpinCo in the same proportion as their respective shareholdings in the Issuer (such transaction, the "Separation"). In the Separation, the Warrant held by the Reporting Persons shall be split into a subscription right for shares of the Issuer and for shares of SpinCo in accordance with the terms set forth in the Separation Agreement. In the Separation Agreement, A1 has agreed to, and Gilead has agreed to cause A1 to, exercise its rights as a shareholder of the Issuer to attend any shareholder meeting of the Issuer to which proposals in relation to the Separation shall be submitted, and to vote all of its shares of the Issuer at such meetings to approve the Separation and other related matters, in each case if such Separation is in accordance with the terms of the Separation Agreement. The foregoing summary is not complete and is qualified in its entirety by reference to the full text of the Separation Agreement, which is attached hereto as Exhibit 99.4 and incorporated herein by reference.