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10-Q

Quarterly Report

Spero Therapeutics, Inc. SPRO

0001193125-25-280174

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Filed
Nov 13, 2025 12:00 AM ET
Period of report

On SEC.gov

Financials in this filing

Metric Period Value
Shares Outstanding Q3 2025 · Nov 6, 2025 56.34M sh
Shares Diluted Q3 2025 · Sep 30, 2025 56.28M sh
Shares Diluted Q3 2025 · Sep 30, 2025 55.87M sh
Shares Diluted Q3 2025 · Sep 30, 2024 54.12M sh
Shares Diluted Q3 2025 · Sep 30, 2024 53.87M sh
Operating Cash Flow Q3 2025 · Sep 30, 2025 −$4.27M
Operating Cash Flow Q3 2025 · Sep 30, 2024 −$43K
Cash And Equivalents Q3 2025 · Sep 30, 2025 $48.62M
Cash And Equivalents Q3 2025 · Dec 31, 2024 $52.89M
Stockholders Equity Q3 2025 · Sep 30, 2025 $26.49M
Stockholders Equity Q3 2025 · Jun 30, 2025 $32.83M
Stockholders Equity Q3 2025 · Dec 31, 2024 $46.12M
Stockholders Equity Q3 2025 · Sep 30, 2024 $65.51M
Stockholders Equity Q3 2025 · Jun 30, 2024 $80.5M
Stockholders Equity Q3 2025 · Dec 31, 2023 $106.89M
Current Liabilities Q3 2025 · Sep 30, 2025 $13.65M
Current Liabilities Q3 2025 · Dec 31, 2024 $49.07M
Total Liabilities Q3 2025 · Sep 30, 2025 $27.68M
Total Liabilities Q3 2025 · Dec 31, 2024 $64.42M
Current Assets Q3 2025 · Sep 30, 2025 $52.32M
Current Assets Q3 2025 · Dec 31, 2024 $107.28M
Total Assets Q3 2025 · Sep 30, 2025 $54.17M
Total Assets Q3 2025 · Dec 31, 2024 $110.54M
Eps Diluted Q3 2025 · Sep 30, 2025 −$0.13
Eps Diluted Q3 2025 · Sep 30, 2025 −$0.41
Eps Diluted Q3 2025 · Sep 30, 2024 −$0.32
Eps Diluted Q3 2025 · Sep 30, 2024 −$0.89
Eps Basic Q3 2025 · Sep 30, 2025 −$0.13
Eps Basic Q3 2025 · Sep 30, 2025 −$0.41
Eps Basic Q3 2025 · Sep 30, 2024 −$0.32
Eps Basic Q3 2025 · Sep 30, 2024 −$0.89
Sga Expense Q3 2025 · Sep 30, 2025 $4.17M
Sga Expense Q3 2025 · Sep 30, 2025 $16.88M
Sga Expense Q3 2025 · Sep 30, 2024 $5.2M
Sga Expense Q3 2025 · Sep 30, 2024 $16.65M
Rd Expense Q3 2025 · Sep 30, 2025 $8.6M
Rd Expense Q3 2025 · Sep 30, 2025 $32.88M
Rd Expense Q3 2025 · Sep 30, 2024 $26.86M
Rd Expense Q3 2025 · Sep 30, 2024 $67.92M
Net Income Q3 2025 · Sep 30, 2025 −$7.38M
Net Income Q3 2025 · Sep 30, 2025 −$22.95M
Net Income Q3 2025 · Sep 30, 2024 −$17.15M
Net Income Q3 2025 · Sep 30, 2024 −$47.68M
Operating Income Q3 2025 · Sep 30, 2025 −$7.92M
Operating Income Q3 2025 · Sep 30, 2025 −$25.09M
Operating Income Q3 2025 · Sep 30, 2024 −$18.59M
Operating Income Q3 2025 · Sep 30, 2024 −$51.64M
Revenue Q3 2025 · Sep 30, 2025 $0
Revenue Q3 2025 · Sep 30, 2025 $12K
Revenue Q3 2025 · Sep 30, 2024 $65K
Revenue Q3 2025 · Sep 30, 2024 $319K