Supplemental Indenture, dated November 15, 2021 by and between the Company and U.S. Bank National Association

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (as supplemented and in effect, the “Indenture”), dated as of September 13, 2019, providing for the issuance of 2.00% Convertible Senior Notes due 2024 (the “Notes”);

WHEREAS, all things necessary to make this Supplemental Indenture a valid supplement to the Indenture pursuant to its terms and the terms of the Indenture have been done.

NOW, THEREFORE, THIS SUPPLEMENTAL INDENTURE WITNESSETH:

That in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree as follows:

1.    Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.    Irrevocable Elections.

(a)    Irrevocable Election to Eliminate Physical Settlement. The Company hereby irrevocably eliminates the right of the Company to elect Physical Settlement as the Settlement Method on any conversion of Notes that occurs on or after the date of this Supplemental Indenture.

3.    Relationship to Indenture. This Supplemental Indenture is a supplemental indenture within the meaning of the Indenture. The Indenture, as supplemented and amended by this Supplemental Indenture, is in all respects ratified, confirmed and approved and, as supplemented and amended by this Supplemental Indenture, shall be read, taken and construed as one and the same instrument.

4.    Modification of the Indenture. Except as expressly modified by this Supplemental Indenture, the provisions of the Indenture shall continue to apply to the Notes.

6.    Counterparts. This Indenture may be executed by electronic signature and in any number of counterparts, each of which shall be an original, but such counterparts shall together constitute one and the same instrument. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. All notices, approvals, consents, requests and any communications hereunder must be in writing (provided that any such communication sent to Trustee hereunder must be in the form of a document that is signed manually or by way of a digital signature provided by DocuSign (or such other digital signature provider as specified in writing to Trustee by the authorized representative), in English. Issuer agrees to assume all risks arising out of the use of using digital signatures and electronic methods to submit communications to Trustee, including without limitation the risk of Trustee acting on unauthorized instructions, and the risk of interception and misuse by third parties.

7.    Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

8.    The Trustee. The recitals shall be taken as the statements of the Company, and the Trustee assumes no responsibility for the correctness of the same. All of the provisions contained in the Indenture in respect of the rights, privileges, immunities, powers, and duties of the Trustee shall be applicable in respect of this Supplemental Indenture as fully and with like force and effect as though fully set forth in full herein.

9.    Notice to Holders. The Company hereby requests the Trustee provide the notice to Holders (by delivering the notice to DTC LENS) pursuant to Section 14.02(a) of the Indenture attached hereto as Exhibit A promptly following execution of this Supplemental Indenture.