Company: SION
Filing Date: 2025-11-05
Form Type: 10-Q
Source: 0001628280-25-049251
Chunk: 340

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-11-05
Form: 10-Q
Item: Part II, Item 8
Chunk 340
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 Stock Option and Grant Plan, as amended (the “2020 Plan”), provided for the Company to sell or issue common stock or restricted common stock, or to grant incentive stock options or nonqualified stock options for the purchase of common stock, to employees, members of the Board and consultants of the Company. As of the effective date of the 2025 Stock Option and Incentive Plan (the “2025 Plan”), and as of September 30, 2025, no shares remained available for future issuance under the 2020 Plan. Any options or other awards outstanding under the 2020 Plan remain outstanding and effective.2025 Stock Option and Incentive PlanIn January 2025, the Board and the Company's stockholders adopted and approved the 2025 Plan, which became effective on February 5, 2025, the date immediately preceding the date that the registration statement on Form S-1 for the Company's IPO was declared effective by the SEC. The 2025 Plan initially reserved 5,060,000 shares of common stock for future issuances and is subject to automatic increases in the number of shares of common stock reserved for future issuances in accordance with the evergreen provisions in the 2025 Plan. The shares reserved for future issuance under the 2020 Plan ceased to be available for issuance at the time the 2025 Plan became effective. Any shares underlying outstanding stock awards granted under the 2020 Plan that subsequently expire or are repurchased, forfeited, cancelled, or withheld will return to the 2025 Plan and be reserved and available for issuance.2025 Employee Stock Purchase PlanIn January 2025, the Board and the Company's stockholders adopted and approved the 2025 Employee Stock Purchase Plan (the "2025 ESPP"), which became effective on February 5, 2025, the date immediately preceding the date that the registration statement on Form S-1 for the Company's IPO was declared effective by the SEC. The 2025 ESPP initially reserved 390,127 shares of common stock for future issuance and is subject to automatic increases in the number of shares of common stock reserved for future issuances in accordance with the evergreen provisions in the 2025 ESPP. As of September 30, 2025, no offering periods had commenced under the 2025 ESPP.Stock Option Activity The following table summarizes the Company’s common stock option activity for the nine months ended September 30, 2025: Number ofCommonStockOptions