Company: KROS
Filing Date: 2025-04-23
Form Type: DEF 14A
Source: 0001104659-25-037982
Chunk: 13

Company: Keros Therapeutics, Inc.
Filing Date: 2025-04-23
Form: DEF 14A
Chunk 13
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 and vote electronically. Simply attending the Annual Meeting will not, by itself, revoke your proxy. Even if you plan to attend the Annual Meeting, we recommend that you also submit your proxy or voting instructions or vote by telephone or through the internet in advance of the Annual Meeting so that your vote will be counted if you later decide not to attend the Annual Meeting. Your most current proxy card or telephone or internet proxy is the one that is counted. Beneficial Owner: Shares Registered in the Name of Broker or Bank If your shares are held by your broker, bank or other agent, you should follow the instructions provided by your broker, bank or other agent. How are votes counted? Votes will be counted by the inspector of election appointed for the Annual Meeting, who will separately count, for: • Proposal 1, votes “FOR,” “WITHHOLD” and broker non-votes; • Proposal 2, votes “FOR,” “AGAINST” and abstentions; and • Proposal 3, votes “FOR,” “AGAINST,” abstentions and, if applicable, broker non-votes. 6

TABLE OF CONTENTS

Abstentions will be counted towards the vote total for each proposal. Abstentions will have the same effect as “AGAINST” votes on Proposals 2 and 3, and will have no effect on Proposal 1. Broker non-votes on Proposals 1 and 3 will have no effect and will not be counted towards the vote total for any of those proposals. How many votes are needed to approve each proposal? The following table summarizes the minimum vote needed to approve each proposal and the effect of abstentions and broker non-votes.

| ​ | ProposalNo. | ​ | ​ | Proposal Description                                                                                                                                     | ​ | ​ | Vote Required for Approval                                                                                                                                                                                                                                                                                                              | ​ | ​ | Effect ofAbstentions                             | ​ | ​ | Effect ofBrokerNon-Votes | ​ |
| ​ |           1 | ​ | ​ | Election of directors                                                                                                                                    | ​ | ​ | Directors will be elected by a plurality of the votes cast at the Annual Meeting by the holders of shares present by remote communication or represented by proxy and entitled to vote on the election of directors. The three nominees receiving the most “FOR” votes will be elected as directors; withheld votes will have no effect | ​ | ​ | Under plurality voting, there are no abstentions | ​ | ​ | No effect                | ​ |
| ​ |           2 | ​ | ​ | Ratification