Solid Biosciences Announces Oversubscribed $240 Million Private Placement

CHARLESTOWN, Mass., March 06, 2026 — Solid Biosciences Inc. (Nasdaq: SLDB), a life sciences company developing precision genetic medicines for neuromuscular and cardiac diseases, today announced that it has entered into a securities purchase agreement with a select group of institutional accredited investors for an approximately $240 million private placement, before deducting placement agent fees and offering expenses, which is expected to close on or about March 9, 2026, subject to the satisfaction of customary closing conditions. The private placement is being conducted in accordance with applicable Nasdaq rules and was priced to satisfy the “Minimum Price” requirement (as defined in the Nasdaq rules).

In the private placement, the Company is selling 14,973,257 shares of common stock at a price of $5.61 per share and, in lieu of common stock to investors who so choose, pre-funded warrants to purchase up to 27,807,482 shares of common stock at a price of $5.609 per pre-funded warrant. Each pre-funded warrant will have an exercise price of $0.001 per share, will be exercisable immediately, and will be exercisable until exercised in full.

The private placement was anchored by existing and new investors, including Perceptive Advisors, Bain Capital Life Sciences, RA Capital Management, Invus, Vestal Point Capital, Janus Henderson Investors, and Deep Track Capital, among others.

The Company expects to use net proceeds from the private placement to fund ongoing pipeline development programs, business development activities, and for working capital and other general corporate purposes.

Leerink Partners and Citigroup are acting as joint lead placement agents for the financing. Cantor is acting as co-lead placement agent for the financing. Truist and H.C. Wainwright & Co. are acting as co-placement agents for the financing.

The securities to be sold in the private placement have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), or any state or other applicable jurisdiction’s securities laws, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act and applicable state or other jurisdictions’ securities laws. The Company has agreed to file a registration statement with the U.S. Securities and Exchange Commission (the “SEC”) registering the resale of the shares of common stock issued in the private placement and the shares of common stock issuable upon the exercise of the pre-funded warrants issued in the private placement no later than the 30th day after the closing of the private placement.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any offer, solicitation or sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful. Any offering of the securities under the resale registration statement will only be made by means of a prospectus.

About Solid Biosciences

Solid Biosciences is a precision genetic medicine company focused on advancing a portfolio of gene therapy candidates targeting rare neuromuscular and cardiac diseases, including SGT-003 for Duchenne muscular dystrophy (Duchenne), SGT-212 for Friedreich’s ataxia (FA), SGT-501 for catecholaminergic polymorphic ventricular tachycardia (CPVT), SGT-601 for TNNT2-mediated dilated cardiomyopathy and additional fatal, genetic cardiac diseases. The Company is also focused on developing innovative libraries of genetic regulators and other enabling technologies with promising potential to significantly impact gene therapy delivery cross-industry. Solid is advancing its diverse pipeline and delivery platform in the pursuit of uniting experts in science, technology, disease management, and care. Patient-focused and founded by those directly impacted by Duchenne, Solid’s mission is to improve the daily lives of patients living with devastating rare diseases.

Solid Biosciences Investor Contact

Nicole Anderson Senior Director, Investor Relations and Corporate Communications Solid Biosciences Inc. [email protected]

Media Contact

Glenn Silver FINN Partners [email protected]