Company: RGNX
Filing Date: 2025-06-13
Form Type: S-3
Source: 0001193125-25-140870
Chunk: 10

Company: REGENXBIO Inc.
Filing Date: 2025-06-13
Form: S-3
Chunk 10
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laws contain provisions that could make it more difficult to effect an acquisition of us by means of a tender offer, proxy contest or otherwise, or to remove our incumbent officers and directors. It is possible that these provisions could make it more difficult to accomplish, or could deter, transactions that stockholders otherwise consider to be in our or their best interest, including transactions which provide for payment of a premium over the market price for our shares. These provisions, summarized below, are intended to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first negotiate with our board of directors. We believe that the benefits of the increased protection of our potential ability to negotiate with the proponent of an unsolicited or unfriendly proposal to acquire or restructure us outweigh the disadvantages of discouraging these proposals because negotiation of these proposals could result in an improvement of their terms. Delaware Business Combination Statute We are subject to Section 203 of the Delaware General Corporation Law. Section 203 prohibits a publicly held Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a period of three years following the time of the transaction in which the person or entity became an interested stockholder, unless:

| • |     | prior to that time, either the business combination or the transaction that resulted in the stockholder becoming 
 an interested stockholder is approved by the board of directors of the corporation;                              |

| • |     | upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the                                                                                                                                       
 interested stockholder owned at least 85% of the outstanding voting stock of the corporation, excluding for this purpose shares owned by persons who are directors and also officers of the corporation and by specified employee benefit plans; or |

| • |     | at or after such time, the business combination is approved by the board of directors of the corporation and by                                        
 the affirmative vote, and not by written consent, of at least 66 2/3% of the outstanding voting stock that is not owned by the interested stockholder. |

For the purposes of Section 203, a “business combination” is broadly defined to include:

| • |     | any merger or consolidation involving the corporation and the interested stockholder; |

| • |     | any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the 
 interested stockholder;                                                                                       |

| • |     | any transaction that results