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Spero Therapeutics, Inc.
SPRO
NASDAQ
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Overall Rating
C-
Strong Sell
1
/5
Valuation Metrics
DCF Valuation
Strong Sell
1
P/E Ratio
Strong Sell
1
P/B Ratio
Sell
2
Quality Metrics
Return on Equity
Strong Sell
1
Return on Assets
Strong Sell
1
Debt to Equity
Neutral
3
Rating Scale
5 = Strong Buy
3-4 = Buy / Neutral
2 = Sell
1 = Strong Sell
Last updated: February 2, 2026