Company: RGNX
Filing Date: 2025-06-13
Form Type: S-3
Source: 0001193125-25-140870
Chunk: 9

Company: REGENXBIO Inc.
Filing Date: 2025-06-13
Form: S-3
Chunk 9
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, we had
50,388,693 shares of common stock outstanding held of record by five stockholders. No shares of preferred stock were outstanding as of such date.

Dividend Rights

Subject to
preferences that may apply to shares of preferred stock outstanding at the time, the holders of outstanding shares of our common stock are entitled to receive dividends out of assets legally available at the times and in the amounts that our board
of directors may determine from time to time.

Preemptive and Conversion Rights

Holders of common stock have no preemptive or conversion rights or other subscription rights.

Redemption and Sinking Fund Rights

There are no redemption or sinking fund provisions applicable to our common stock.

Liquidation Rights

Upon our
liquidation, dissolution or winding-up, the holders of common stock are entitled to share ratably in all assets remaining after payment of all liabilities and the liquidation preferences of any outstanding
preferred stock.

Voting Rights

Each holder of common stock is entitled to one vote per share on all matters submitted to a vote of stockholders. Notwithstanding the previous
sentence, unless otherwise provided by law holders of common stock are not entitled to vote on any amendment to our restated certificate of incorporation that relates solely to the terms of any preferred stock if the holders of such preferred stock
are entitled to vote on such amendment. Except as otherwise provided by law, our restated certificate of incorporation or our amended and restated bylaws, all matters other than the election of directors shall be decided by the affirmative vote of a
majority of the voting power of the outstanding voting stock that is present in person or represented by proxy at a meeting of stockholders and entitled to vote thereon. Except as otherwise set forth in the restated certificate of incorporation with
respect to the right of holders of any series of preferred stock or any other series or class of stock to elect additional directors under specified circumstances, a plurality of votes cast shall elect directors.

We have not provided for cumulative voting in the election of directors.

The General Corporation Law of the State of Delaware, or the Delaware General Corporation Law, provides that holders of a class of stock will
have the right to vote separately as a class on any proposal involving fundamental changes in the rights of the holders of that class of stock for proposals that adversely affect such holders.

5

Anti-Takeover Effects of Delaware Law and Our Restated Certificate of Incorporation and Amended and Restated Bylaws Delaware law, our restated certificate of incorporation and our amended and restated by