Company: RGNX
Filing Date: 2025-03-13
Form Type: POS AM
Source: 0001193125-25-053998
Chunk: 34

Company: REGENXBIO Inc.
Filing Date: 2025-03-13
Form: POS AM
Chunk 34
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 including, if applicable, the material terms of any standby underwriting or purchase arrangement. 24

Sale Through Underwriters or Dealers

If we use underwriters for a sale of securities, the underwriters will acquire the securities for their own account for resale to the public,
either on a firm commitment basis or a best efforts basis. The underwriters may resell the securities in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of
sale. Underwriters may offer the securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. If an underwriter or underwriters are used in
the sale of securities hereunder, an underwriting agreement will be executed with the underwriter or underwriters or their representatives at the time an agreement for sale is reached. Unless we inform you otherwise in the applicable prospectus
supplement, the obligations of the underwriters to purchase the securities will be subject to certain conditions. The underwriters may change from time to time any public offering price and any discounts or concessions allowed or reallowed or paid
to dealers.

During and after an offering through underwriters, the underwriters may purchase and sell the securities in the open market.
These transactions may include overallotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. The underwriters may also impose a penalty bid, which means that selling concessions
allowed to syndicate members or other broker-dealers for the offered securities sold for their account may be reclaimed by the syndicate if the offered securities are repurchased by the syndicate in stabilizing or covering transactions. These
activities may stabilize, maintain or otherwise affect the market price of the offered securities, which may be higher than the price that might otherwise prevail in the open market. If commenced, the underwriters may discontinue these activities at
any time.

Some or all of the securities that we offer though this prospectus may be new issues of securities with no established trading
market. Any underwriters to whom we sell our securities for public offering and sale may make a market in those securities, but they will not be obligated to do so and they may discontinue any market making at any time without notice. Accordingly,
we cannot assure you of the liquidity of, or continued trading markets for, any securities that we offer.

If dealers are used for the
sale of securities, we, or an underwriter,