Company: SION
Filing Date: 2025-11-05
Form Type: 10-Q
Source: 0001628280-25-049251
Chunk: 315

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-11-05
Form: 10-Q
Item: Part I, Item 1
Chunk 315
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 loss as follows (in thousands): Three Months EndedSeptember 30,Nine Months EndedSeptember 30,2025202420252024Research and development expense$1,104 $407 $2,992 $1,082 General and administrative expense2,202 619 5,248 1,562 Total$3,306 $1,026 $8,240 $2,644 

As of September 30, 2025, there was $32.0 million of unrecognized stock-based compensation expense for common stock option awards that are expected to be recognized over a weighted average period of 2.7 years. The stock-based compensation expense for restricted common stock awards was de minimis and fully recognized during the three months ended June 30, 2025, when the final vesting conditions were met. 

F-13

10. Segment Information 

The following table presents segment net loss, including significant expense categories (in thousands):Three Months EndedSeptember 30,Nine Months EndedSeptember 30,2025202420252024Research and development expenses:External research and development expenses(1)$11,623 $8,070 $32,892 $21,274 Fees paid to licensors(2)—5,000—5,000Personnel-related expenses, excluding stock-based compensation2,7821,9317,6595,439Facility and information technology allocated expenses4864631,3901,387General and administrative expenses:Personnel-related expenses, excluding stock-based compensation2,9901,5817,6394,048General corporate and facility expenses(3)2,3178636,1622,834Other segment items(4)807,533(914)5,858Net loss$20,278 $25,441 $54,828 $45,840 (1)External research and development expenses consist primarily of costs paid to third-parties including contract research organizations ("CROs"), contract development and manufacturing organizations ("CDMOs"), consultants, advisors and lab-related vendors.(2)Fees paid to licensors consists primarily of upfront and annual licensing fees paid pursuant to the Company's license agreements.(3)General corporate and facility expenses consists primarily of professional services fees for legal, finance, human resources, in addition to information technology expenses and rent expense, net of sublease income.(4)Other segment items consists primarily of interest income, partially offset by non-cash expenses, such as stock-based