Spero Therapeutics, Inc.

SPRO Healthcare Biotechnology

Spero Therapeutics, Inc.’s revenue for fiscal 2025 (year ended December 2025) was $66.8 million, up 39.2% from fiscal 2024. In the quarter to June 2026, revenue fell 95.6%, EPS fell 433.3% and free cash flow grew 69.7%, each against the same quarter a year earlier. Dividend growth for five consecutive years.

1.10 0.03 −2.65%
Market cap
$65.8M
P/E
7.9×
Fwd P/E
4.2×
Dividend yield
—
F-score
5/9
Altman Z
1.04
Beneish M
−1.00
Dividend safety
n/a
Dec '16 Dec '17 Dec '18 Dec '19 Dec '20 Dec '21 Dec '22 Dec '23 Dec '24 Dec '25
P/E ratio
0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.53 0.00 15.53
Piotroski F-Score
— — 3 3 2 4 4 4 2 5
P/S ratio
0.00 15.87 24.81 9.63 46.52 27.09 1.22 0.77 1.16 1.95
Altman Z-Score
— 0.31 2.96 (0.33) 8.97 (0.04) (3.65) (0.81) (6.43) 1.04
Altman Z″-Score (non-manufacturers)
(23.71) 9.98 9.21 (3.40) 2.45 (4.00) (6.62) (1.33) (13.81) (8.90)
P/FCF ratio
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
P/Operating CF
(0.37) (2.47) (7.28) (10.06) (26.49) (18.09) 1.47 (4.58) (2.38) (15.63)
Beneish M-Score
— 2.44 (0.47) 1.95 (2.40) (3.17) (3.03) 21.97 (4.29) (1.00)
P/B ratio
0.00 0.37 0.85 2.34 3.29 5.60 0.86 0.75 1.21 2.21
EV/Sales
0.00 (28.24) (4.29) 5.11 32.92 19.08 (0.82) 0.04 0.06 1.35
EV/EBITDA
0.61 1.35 0.40 0.00 0.00 0.00 1.06 0.17 0.00 14.30
EV/FCF
0.61 1.39 0.40 (1.84) (3.57) (5.41) 5.63 (0.11) (0.12) (7.13)
Current Ratio
1.72 11.29 10.08 3.58 9.70 8.46 5.25 3.53 2.19 7.59
Net Debt/EBITDA
0.31 2.11 2.72 1.31 1.62 1.68 2.64 (3.49) 0.72 (6.38)
Debt/Equity
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
ROE
(169.30%) (258.18%) (41.49%) (63.99%) (76.31%) (81.48%) (56.53%) 24.95% (89.62%) 16.31%
ROA
(434.62%) (85.96%) (37.45%) (51.83%) (60.74%) (55.32%) (31.37%) 14.85% (46.81%) 9.55%
ROIC
0.00% 0.00% (6,493.63%) 0.00% (963.10%) 0.00% 0.00% 43.93% 0.00% 21.04%
Return on Tangible Assets
(463.71%) (54.19%) (36.29%) (85.78%) (62.33%) (64.01%) (50.29%) 24.25% (117.81%) 14.67%
Average Days of Receivables
331.22 542.80 119.46 171.89 241.61 52.80 7.39 178.30 399.23 138.71
Earnings Yield
(951.57%) (710.00%) (42.76%) (34.30%) (18.62%) (18.05%) (95.40%) 28.29% (123.30%) 6.44%
Free Cash Flow Yield
(922.37%) (128.00%) (43.03%) (28.81%) (19.82%) (13.02%) (11.88%) (41.24%) (42.19%) (9.70%)
Free Cash Flow per Share
(95.42) (15.13) (2.63) (2.77) (3.84) (2.08) (0.21) (0.63) (0.43) (0.23)
Book value per Share
20.37 32.84 7.24 4.11 5.90 2.86 2.02 2.03 0.85 1.05
Free Cash Flow
(29.79) (39.14) (42.06) (50.33) (86.03) (64.31) (7.73) (32.99) (23.44) (12.62)
EV/EBIT
0.60 1.34 0.40 0.00 0.00 0.00 1.04 0.18 0.00 14.30
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