Item 5.07 Submission of Matters to a Vote of Security Holders

On June 15, 2023, Prometheus Biosciences, Inc., a Delaware corporation ("Prometheus" or the "Company"), held a virtual special meeting of its stockholders (the "Special Meeting") to vote on the proposals identified in the definitive proxy statement of Prometheus prepared in connection with the Merger Agreement (as defined below) filed with the U.S. Securities and Exchange Commission (the "SEC") on May 16, 2023, which was first mailed to the Prometheus' stockholders on May 16, 2023.

As of the close of business on May 15, 2023, the record date for the Special Meeting, there were 47,813,238 shares of common stock, par value $0.0001 per share, of Prometheus ("Prometheus Common Stock") issued and outstanding and entitled to vote at the Special Meeting. 84.24% of all of the shares of issued and outstanding Prometheus Common Stock entitled to vote were present in person (virtually) or represented by proxy at the Special Meeting and thus a quorum was present. The tables below detail the final voting results for each proposal:



    1.   Proposal No. 1 - The Merger Proposal: To adopt the Agreement and Plan of
         Merger (as it may be amended from time to time, the "Merger Agreement"),
         dated as of April 15, 2023, by and among Merck & Co., Inc., a New Jersey
         corporation ("Merck"), Splash Merger Sub, Inc., a Delaware corporation
         and a direct wholly owned subsidiary of Merck ("Merger Sub"), and
         Prometheus, pursuant to which Merger Sub will be merged with and into
         Prometheus, with Prometheus surviving as a wholly owned subsidiary of
         Merck (the "Merger" and such proposal, the "Merger Proposal").


The Merger Proposal was approved by the requisite vote of Prometheus'
stockholders.

Votes For    Votes Against   Abstentions   Broker Non-Votes
40,213,094      19,498         43,253             0



    2.   Proposal No. 2 - The Merger Compensation Proposal: To approve, on a
         non-binding, advisory basis, certain compensation that will or may be
         paid or become payable to Prometheus' named executive officers that is
         based on or otherwise relates to the Merger (the "Merger Compensation
         Proposal").


The Merger Compensation Proposal was approved by the requisite vote of
Prometheus' stockholders.

Votes For    Votes Against   Abstentions   Broker Non-Votes
22,672,271    17,411,044       192,530            0



    3.   Proposal No. 3 - The Adjournment Proposal: To approve the adjournment of
         the Special Meeting to a later date or dates if necessary to solicit
         additional proxies if there are insufficient votes in person or by proxy
         to approve the Merger Proposal at the time of the Special Meeting (the
         "Adjournment Proposal").

Adjournment of the Special Meeting was deemed not necessary because there was a quorum present and there were sufficient proxies at the time of the Special Meeting to approve the Merger Proposal.

Votes For Votes Against Abstentions Broker Non-Votes 37,410,999 2,722,081 142,765

            0


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