Company: SION
Filing Date: 2025-02-07
Form Type: 424B4
Source: 0001193125-25-022709
Chunk: 257

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-02-07
Form: 424B4
Chunk 257
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 has been subsequently amended thereafter. Our 2020 Plan allows for the grant of incentive stock options to our employees and any of our subsidiary corporations’ employees, and for the grant of nonqualified stock options, restricted shares of common stock, unrestricted shares of common stock, and restricted stock units awards to our employees, officers, directors and consultants of ours and our subsidiary corporations. Following this offering, we will not grant any further awards under our 2020 Plan, but all outstanding awards under the 2020 Plan will continue to be governed by their existing terms. In connection with this offering, we intend to adopt a new incentive equity plan under which we will grant equity-based awards following this offering, as described below under “ 2025 Stock Option and Incentive Plan.” This summary is not a complete description of all provisions of the 2020 Plan and is qualified in its entirety by reference to the 2020 Plan, which will be filed as an exhibit to the registration statement of which this prospectus forms a part. Under the 2020 Plan, we reserved for issuance an aggregate of 6,067,288 shares of our common stock. The number of shares of common stock reserved for issuance is subject to adjustment in the event of a reorganization, reclassification, stock dividend, stock split, reverse stock split, recapitalization or other similar change in our capital stock that constitutes an equity restructuring. No more than 6,067,288 shares may be issued pursuant to incentive stock options. The 2020 Plan is administered by our board of directors or a committee appointed by it. The plan administrator has full power to, among other things, select, from among the individuals eligible for awards, the individuals to whom awards will be granted, to accelerate the time at which a stock award may be exercised or vest, to amend the 2020 Plan and to determine the specific terms and conditions of each award, subject to the provisions of the 2020 Plan. The plan administrator may exercise its discretion to reduce the exercise price of outstanding options under the 2020 Plan or effect repricing through cancellation of such outstanding options and by granting such holders new awards in replacement of the cancelled options. The 2020 Plan permits the grant of stock options. The exercise price per share of all options must equal at least 100% of the fair market value per share of our common stock on the date of grant. The term of a stock option may not exceed ten years. An incentive stock option granted to a participant who owns more than