Leiden, the Netherlands—June 27, 2013—Prosensa Holding B.V. (“Prosensa”) announced today the pricing of its initial public offering of 6,000,000 of its ordinary shares at an initial public offering price of $13.00 per share, before underwriting discounts. Prosensa has also granted the underwriters a 30-day option to purchase up to an additional 900,000 ordinary shares to cover over-allotments, if any. The ordinary shares are expected to begin trading on the Nasdaq Global Select Market on June 28, 2013 under the symbol “RNA.”