Solid Biosciences (SLDB) investor relations material

Executive summary

• Annual meeting scheduled for June 10, 2026, at 8:00 AM ET, to be held virtually.

• Shareholders are encouraged to review proxy materials and vote in advance or during the meeting.

Voting matters and shareholder proposals

• Election of three Class II directors: Clare Kahn, Adam Stone, and Lynne Sullivan, with board recommendation to vote for all.

• Advisory ratification of llan Ganot as a Class I Director until the 2028 annual meeting.

• Ratification of PricewaterhouseCoopers LLP as independent auditor for fiscal year ending December 31, 2026.

• Approval of an amendment to increase authorized common stock from 240,000,000 to 480,000,000 shares.

• Advisory vote on executive compensation.

Board of directors and corporate governance

• Board recommends all director nominees and advisory appointments.

• Proxies are authorized to vote on other business as may arise during the meeting.