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US · SPRO

Spero Therapeutics, Inc.

Programmatic access: InvestorsCraft Valuation API · catalog

Sector
Healthcare · Biotechnology
Headquarters
Cambridge, MA 02139

Price · as of 2026-09-04

$1.21

Market cap 72.96M

Price history

Weekly OHLC price history for SPRO, USD per share
WeekOpenHighLowCloseVolume
Oct 30, 2017 – Nov 3, 2017$13.25$13.63$10.83$11.560
Nov 6, 2017 – Nov 10, 2017$11.35$15.00$11.35$14.150
Nov 13, 2017 – Nov 17, 2017$14.85$15.40$12.00$14.490
Nov 20, 2017 – Nov 24, 2017$14.30$14.30$12.33$13.860
Nov 27, 2017 – Dec 1, 2017$14.26$15.00$11.90$12.140
Dec 4, 2017 – Dec 8, 2017$12.18$13.40$9.85$10.500
Dec 11, 2017 – Dec 15, 2017$10.69$12.18$10.43$10.820
Dec 18, 2017 – Dec 22, 2017$10.82$12.22$10.30$11.880
Dec 25, 2017 – Dec 29, 2017$11.65$12.10$11.32$11.750
Jan 1, 2018 – Jan 5, 2018$11.82$12.29$11.17$11.590
Jan 8, 2018 – Jan 12, 2018$11.90$12.49$11.23$12.250
Jan 15, 2018 – Jan 19, 2018$12.30$12.99$11.55$12.060
Jan 22, 2018 – Jan 26, 2018$12.73$12.73$12.00$12.230
Jan 29, 2018 – Feb 2, 2018$12.20$13.00$12.07$12.090
Feb 5, 2018 – Feb 9, 2018$12.00$12.86$11.50$11.880
Feb 12, 2018 – Feb 16, 2018$11.32$12.64$9.66$10.040
Feb 19, 2018 – Feb 23, 2018$10.01$10.90$9.77$10.510
Feb 26, 2018 – Mar 2, 2018$10.41$11.60$10.12$11.550
Mar 5, 2018 – Mar 9, 2018$11.15$12.00$10.66$12.000
Mar 12, 2018 – Mar 16, 2018$11.90$14.61$11.90$14.610
Mar 19, 2018 – Mar 23, 2018$14.50$14.55$13.31$13.750
Mar 26, 2018 – Mar 29, 2018$13.92$14.38$13.20$14.250
Apr 2, 2018 – Apr 6, 2018$14.45$14.71$13.08$13.860
Apr 9, 2018 – Apr 13, 2018$14.00$19.00$12.87$15.490
Apr 16, 2018 – Apr 20, 2018$15.69$15.69$12.50$12.910
Apr 23, 2018 – Apr 27, 2018$13.01$13.96$12.15$12.450
Apr 30, 2018 – May 4, 2018$12.80$13.20$12.05$12.400
May 7, 2018 – May 11, 2018$12.49$13.16$11.26$12.040
May 14, 2018 – May 18, 2018$12.03$12.74$11.30$12.100
May 21, 2018 – May 25, 2018$12.20$12.50$10.12$10.410
May 28, 2018 – Jun 1, 2018$10.40$11.49$10.14$11.400
Jun 4, 2018 – Jun 8, 2018$11.48$11.96$10.70$10.940
Jun 11, 2018 – Jun 15, 2018$10.93$12.56$10.93$11.950
Jun 18, 2018 – Jun 22, 2018$11.90$15.20$11.36$14.650
Jun 25, 2018 – Jun 29, 2018$14.57$15.41$13.76$14.670
Jul 2, 2018 – Jul 6, 2018$14.65$17.98$14.56$16.890
Jul 9, 2018 – Jul 13, 2018$17.34$18.23$12.05$12.140
Jul 16, 2018 – Jul 20, 2018$12.50$12.50$11.00$11.070
Jul 23, 2018 – Jul 27, 2018$11.00$12.05$10.68$11.030
Jul 30, 2018 – Aug 3, 2018$11.00$11.97$10.66$11.340
Aug 6, 2018 – Aug 10, 2018$11.34$12.12$11.04$11.270
Aug 13, 2018 – Aug 17, 2018$11.39$11.40$10.29$10.620
Aug 20, 2018 – Aug 24, 2018$10.70$11.61$10.56$11.170
Aug 27, 2018 – Aug 31, 2018$11.22$11.60$11.15$11.410
Sep 3, 2018 – Sep 7, 2018$11.50$11.50$10.59$11.010
Sep 10, 2018 – Sep 14, 2018$11.09$11.17$9.54$9.690
Sep 17, 2018 – Sep 21, 2018$9.68$10.96$9.29$10.250
Sep 24, 2018 – Sep 28, 2018$10.27$11.75$9.75$10.510
Oct 1, 2018 – Oct 5, 2018$10.54$11.40$10.25$11.150
Oct 8, 2018 – Oct 12, 2018$11.10$11.27$9.31$9.600
Oct 15, 2018 – Oct 19, 2018$9.62$9.95$7.88$8.520
Oct 22, 2018 – Oct 26, 2018$8.55$8.90$7.80$8.260
Oct 29, 2018 – Nov 2, 2018$8.37$8.75$7.80$8.580
Nov 5, 2018 – Nov 9, 2018$8.72$9.54$8.03$8.570
Nov 12, 2018 – Nov 16, 2018$8.65$8.96$7.18$7.750
Nov 19, 2018 – Nov 23, 2018$7.78$8.26$7.64$8.240
Nov 26, 2018 – Nov 30, 2018$8.25$8.63$7.60$8.180
Dec 3, 2018 – Dec 7, 2018$8.18$8.18$6.45$6.750
Dec 10, 2018 – Dec 14, 2018$6.75$7.17$6.15$6.340
Dec 17, 2018 – Dec 21, 2018$6.37$6.52$5.63$5.900
Dec 24, 2018 – Dec 28, 2018$5.84$6.73$5.52$6.670
Dec 31, 2018 – Jan 4, 2019$6.85$6.94$6.00$6.750
Jan 7, 2019 – Jan 11, 2019$6.75$8.36$6.75$8.210
Jan 14, 2019 – Jan 18, 2019$8.26$8.75$7.46$8.050
Jan 21, 2019 – Jan 25, 2019$8.05$10.51$7.99$9.750
Jan 28, 2019 – Feb 1, 2019$9.77$10.67$9.08$10.590
Feb 4, 2019 – Feb 8, 2019$10.59$11.20$10.13$10.510
Feb 11, 2019 – Feb 15, 2019$10.46$11.19$9.79$10.600
Feb 18, 2019 – Feb 22, 2019$10.56$11.64$10.25$11.490
Feb 25, 2019 – Mar 1, 2019$11.50$12.30$11.31$11.750
Mar 4, 2019 – Mar 8, 2019$11.74$12.20$11.31$11.750
Mar 11, 2019 – Mar 15, 2019$12.12$13.31$11.84$13.310
Mar 18, 2019 – Mar 22, 2019$13.25$13.50$12.60$13.180
Mar 25, 2019 – Mar 29, 2019$13.11$13.50$11.97$12.810
Apr 1, 2019 – Apr 5, 2019$12.98$14.27$12.80$14.100
Apr 8, 2019 – Apr 12, 2019$14.09$14.48$12.45$12.830
Apr 15, 2019 – Apr 18, 2019$12.93$13.11$11.63$11.850
Apr 22, 2019 – Apr 26, 2019$11.85$12.63$11.83$12.070
Apr 29, 2019 – May 3, 2019$12.11$12.28$10.41$11.240
May 6, 2019 – May 10, 2019$11.19$12.90$11.02$12.690
May 13, 2019 – May 17, 2019$12.52$13.41$11.52$12.000
May 20, 2019 – May 24, 2019$11.67$12.46$11.09$11.370
May 27, 2019 – May 31, 2019$11.29$11.47$10.60$11.260
Jun 3, 2019 – Jun 7, 2019$11.28$11.97$10.20$10.470
Jun 10, 2019 – Jun 14, 2019$10.70$12.65$9.91$11.310
Jun 17, 2019 – Jun 21, 2019$11.88$14.38$11.53$13.810
Jun 24, 2019 – Jun 28, 2019$14.00$14.20$10.75$11.510
Jul 1, 2019 – Jul 5, 2019$11.61$12.25$11.00$11.650
Jul 8, 2019 – Jul 12, 2019$11.65$11.73$10.31$10.460
Jul 15, 2019 – Jul 19, 2019$10.43$11.22$9.82$9.920
Jul 22, 2019 – Jul 26, 2019$10.00$10.67$9.78$10.420
Jul 29, 2019 – Aug 2, 2019$10.42$10.70$9.41$9.570
Aug 5, 2019 – Aug 9, 2019$9.24$9.74$8.86$9.230
Aug 12, 2019 – Aug 16, 2019$9.20$10.24$9.00$10.140
Aug 19, 2019 – Aug 23, 2019$10.14$10.25$9.60$9.660
Aug 26, 2019 – Aug 30, 2019$9.75$10.19$9.70$9.950
Sep 2, 2019 – Sep 6, 2019$9.96$10.48$9.80$9.980
Sep 9, 2019 – Sep 13, 2019$10.74$12.65$10.26$11.940
Sep 16, 2019 – Sep 20, 2019$11.85$12.55$11.53$11.770
Sep 23, 2019 – Sep 27, 2019$11.74$11.81$10.49$10.900
Sep 30, 2019 – Oct 4, 2019$10.85$11.09$10.10$10.470
Oct 7, 2019 – Oct 11, 2019$10.47$11.07$10.12$11.030
Oct 14, 2019 – Oct 18, 2019$11.09$11.69$10.53$10.740
Oct 21, 2019 – Oct 25, 2019$10.87$11.08$10.00$10.790
Oct 28, 2019 – Nov 1, 2019$10.97$11.50$10.49$10.600
Nov 4, 2019 – Nov 8, 2019$10.89$10.99$10.41$10.530
Nov 11, 2019 – Nov 15, 2019$10.52$10.69$10.10$10.220
Nov 18, 2019 – Nov 22, 2019$10.15$11.44$9.35$11.110
Nov 25, 2019 – Nov 29, 2019$11.15$12.45$11.15$11.960
Dec 2, 2019 – Dec 6, 2019$12.02$12.47$11.02$11.940
Dec 9, 2019 – Dec 13, 2019$12.06$12.08$10.61$11.090
Dec 16, 2019 – Dec 20, 2019$11.20$11.54$10.51$10.820
Dec 23, 2019 – Dec 27, 2019$10.74$10.90$10.01$10.420
Dec 30, 2019 – Jan 3, 2020$10.42$10.42$8.74$9.580
Jan 6, 2020 – Jan 10, 2020$9.52$9.61$9.02$9.060
Jan 13, 2020 – Jan 17, 2020$9.08$9.49$8.81$8.890
Jan 20, 2020 – Jan 24, 2020$8.90$10.04$8.90$9.810
Jan 27, 2020 – Jan 31, 2020$9.72$10.15$9.17$9.210
Feb 3, 2020 – Feb 7, 2020$9.22$10.19$9.22$9.700
Feb 10, 2020 – Feb 14, 2020$9.64$10.84$8.93$8.990
Feb 17, 2020 – Feb 21, 2020$9.01$10.00$9.00$9.600
Feb 24, 2020 – Feb 28, 2020$9.47$9.96$9.04$9.540
Mar 2, 2020 – Mar 6, 2020$9.50$9.70$8.90$9.180
Mar 9, 2020 – Mar 13, 2020$8.49$9.10$6.25$6.480
Mar 16, 2020 – Mar 20, 2020$6.08$6.97$5.25$5.810
Mar 23, 2020 – Mar 27, 2020$5.77$8.18$5.76$7.760
Mar 30, 2020 – Apr 3, 2020$7.90$8.10$6.88$7.270
Apr 6, 2020 – Apr 9, 2020$7.54$8.03$7.27$7.910
Apr 13, 2020 – Apr 17, 2020$7.80$8.40$7.39$7.900
Apr 20, 2020 – Apr 24, 2020$7.68$9.04$7.63$8.600
Apr 27, 2020 – May 1, 2020$8.75$12.98$8.65$11.990
May 4, 2020 – May 8, 2020$11.80$12.74$11.42$11.780
May 11, 2020 – May 15, 2020$11.85$13.38$11.01$11.930
May 18, 2020 – May 22, 2020$12.22$12.76$11.62$12.500
May 25, 2020 – May 29, 2020$13.00$13.06$11.07$11.820
Jun 1, 2020 – Jun 5, 2020$12.00$13.93$11.75$12.440
Jun 8, 2020 – Jun 12, 2020$12.99$13.67$11.50$11.950
Jun 15, 2020 – Jun 19, 2020$11.64$13.99$11.52$13.410
Jun 22, 2020 – Jun 26, 2020$13.52$14.48$12.72$13.160
Jun 29, 2020 – Jul 2, 2020$13.20$13.93$12.83$13.370
Jul 6, 2020 – Jul 10, 2020$13.80$14.37$12.85$13.020
Jul 13, 2020 – Jul 17, 2020$13.22$14.09$12.61$13.350
Jul 20, 2020 – Jul 24, 2020$13.35$13.69$12.00$12.120
Jul 27, 2020 – Jul 31, 2020$12.22$12.71$11.55$11.700
Aug 3, 2020 – Aug 7, 2020$11.71$13.66$11.69$12.980
Aug 10, 2020 – Aug 14, 2020$13.07$13.65$12.10$12.490
Aug 17, 2020 – Aug 21, 2020$12.61$13.74$12.58$12.860
Aug 24, 2020 – Aug 28, 2020$13.00$13.12$9.39$10.510
Aug 31, 2020 – Sep 4, 2020$11.01$11.29$8.50$8.960
Sep 7, 2020 – Sep 11, 2020$9.26$14.30$8.90$9.910
Sep 14, 2020 – Sep 18, 2020$10.23$10.50$9.60$10.110
Sep 21, 2020 – Sep 25, 2020$9.91$9.99$9.26$9.530
Sep 28, 2020 – Oct 2, 2020$9.70$12.40$9.25$12.060
Oct 5, 2020 – Oct 9, 2020$12.27$13.70$12.00$13.310
Oct 12, 2020 – Oct 16, 2020$13.42$14.60$12.69$13.000
Oct 19, 2020 – Oct 23, 2020$13.14$14.25$12.90$14.020
Oct 26, 2020 – Oct 30, 2020$14.03$14.10$13.00$13.110
Nov 2, 2020 – Nov 6, 2020$12.95$14.94$12.73$13.680
Nov 9, 2020 – Nov 13, 2020$14.00$15.24$13.49$14.320
Nov 16, 2020 – Nov 20, 2020$14.16$15.49$14.16$15.180
Nov 23, 2020 – Nov 27, 2020$15.86$16.94$14.90$16.730
Nov 30, 2020 – Dec 4, 2020$16.90$17.89$16.20$17.450
Dec 7, 2020 – Dec 11, 2020$17.18$18.07$16.52$17.200
Dec 14, 2020 – Dec 18, 2020$17.58$19.44$16.95$17.700
Dec 21, 2020 – Dec 24, 2020$17.32$23.45$17.01$21.970
Dec 28, 2020 – Dec 31, 2020$23.11$23.64$18.60$19.390
Jan 4, 2021 – Jan 8, 2021$19.48$19.87$15.99$16.720
Jan 11, 2021 – Jan 15, 2021$16.72$17.00$15.82$16.450
Jan 18, 2021 – Jan 22, 2021$17.08$18.94$16.75$18.790
Jan 25, 2021 – Jan 29, 2021$19.97$20.00$17.57$18.110
Feb 1, 2021 – Feb 5, 2021$18.30$21.00$14.02$19.970
Feb 8, 2021 – Feb 12, 2021$21.55$22.24$19.57$20.350
Feb 15, 2021 – Feb 19, 2021$20.64$21.32$19.89$20.540
Feb 22, 2021 – Feb 26, 2021$20.60$20.66$17.58$18.170
Mar 1, 2021 – Mar 5, 2021$18.68$19.13$14.82$16.340
Mar 8, 2021 – Mar 12, 2021$16.37$17.94$15.94$16.740
Mar 15, 2021 – Mar 19, 2021$17.00$17.51$15.44$15.870
Mar 22, 2021 – Mar 26, 2021$15.78$16.29$12.70$13.810
Mar 29, 2021 – Apr 1, 2021$13.66$15.24$13.06$14.280
Apr 5, 2021 – Apr 9, 2021$14.68$15.09$12.72$13.080
Apr 12, 2021 – Apr 16, 2021$13.08$13.77$12.43$12.930
Apr 19, 2021 – Apr 23, 2021$12.63$13.75$11.88$13.180
Apr 26, 2021 – Apr 30, 2021$13.58$14.48$13.30$13.760
May 3, 2021 – May 7, 2021$13.90$14.07$12.26$13.420
May 10, 2021 – May 14, 2021$13.42$13.97$11.75$13.930
May 17, 2021 – May 21, 2021$13.62$14.81$13.19$14.500
May 24, 2021 – May 28, 2021$14.55$15.36$13.73$14.500
May 31, 2021 – Jun 4, 2021$14.72$14.96$13.74$14.210
Jun 7, 2021 – Jun 11, 2021$14.31$15.94$14.23$15.420
Jun 14, 2021 – Jun 18, 2021$15.55$15.79$14.24$14.670
Jun 21, 2021 – Jun 25, 2021$14.63$15.58$13.75$14.900
Jun 28, 2021 – Jul 2, 2021$14.96$17.14$13.59$15.790
Jul 5, 2021 – Jul 9, 2021$15.70$16.01$14.55$15.760
Jul 12, 2021 – Jul 16, 2021$15.57$15.57$13.91$14.430
Jul 19, 2021 – Jul 23, 2021$14.14$15.11$13.80$14.330
Jul 26, 2021 – Jul 30, 2021$14.33$14.71$13.06$13.340
Aug 2, 2021 – Aug 6, 2021$13.35$14.43$13.35$14.140
Aug 9, 2021 – Aug 13, 2021$14.17$14.57$13.40$13.520
Aug 16, 2021 – Aug 20, 2021$13.42$15.55$12.75$15.460
Aug 23, 2021 – Aug 27, 2021$15.43$17.50$15.10$16.960
Aug 30, 2021 – Sep 3, 2021$17.26$19.49$17.04$17.910
Sep 6, 2021 – Sep 10, 2021$17.55$18.99$17.51$18.320
Sep 13, 2021 – Sep 17, 2021$18.57$19.82$18.03$19.150
Sep 20, 2021 – Sep 24, 2021$18.59$19.69$17.94$18.730
Sep 27, 2021 – Oct 1, 2021$18.75$19.87$16.67$17.550
Oct 4, 2021 – Oct 8, 2021$17.29$18.84$16.67$17.080
Oct 11, 2021 – Oct 15, 2021$17.01$18.16$16.97$17.020
Oct 18, 2021 – Oct 22, 2021$17.07$17.41$16.04$16.860
Oct 25, 2021 – Oct 29, 2021$16.80$17.79$16.17$17.560
Nov 1, 2021 – Nov 5, 2021$17.54$18.35$17.10$17.520
Nov 8, 2021 – Nov 12, 2021$17.52$17.82$16.27$16.790
Nov 15, 2021 – Nov 19, 2021$16.85$17.08$15.81$16.500
Nov 22, 2021 – Nov 26, 2021$16.46$16.95$15.05$15.110
Nov 29, 2021 – Dec 3, 2021$15.46$15.72$13.18$13.560
Dec 6, 2021 – Dec 10, 2021$13.54$14.72$13.01$13.630
Dec 13, 2021 – Dec 17, 2021$13.64$14.00$12.64$13.590
Dec 20, 2021 – Dec 23, 2021$13.35$14.24$12.80$14.020
Dec 27, 2021 – Dec 31, 2021$14.18$16.25$13.22$16.010
Jan 3, 2022 – Jan 7, 2022$16.29$16.30$12.58$13.100
Jan 10, 2022 – Jan 14, 2022$12.89$13.45$11.69$13.200
Jan 17, 2022 – Jan 21, 2022$12.62$12.99$11.57$11.600
Jan 24, 2022 – Jan 28, 2022$11.22$12.18$10.86$11.090
Jan 31, 2022 – Feb 4, 2022$11.07$12.04$10.45$10.630
Feb 7, 2022 – Feb 11, 2022$10.60$10.90$9.94$10.050
Feb 14, 2022 – Feb 18, 2022$10.02$10.19$9.05$9.260
Feb 21, 2022 – Feb 25, 2022$9.08$9.53$8.28$9.480
Feb 28, 2022 – Mar 4, 2022$9.58$9.70$8.58$8.610
Mar 7, 2022 – Mar 11, 2022$8.60$9.58$8.00$8.360
Mar 14, 2022 – Mar 18, 2022$8.32$8.73$7.51$8.380
Mar 21, 2022 – Mar 25, 2022$8.72$8.99$8.11$8.150
Mar 28, 2022 – Apr 1, 2022$8.42$9.00$6.57$7.110
Apr 4, 2022 – Apr 8, 2022$7.05$7.87$6.51$7.360
Apr 11, 2022 – Apr 14, 2022$7.30$7.30$6.10$6.110
Apr 18, 2022 – Apr 22, 2022$6.02$6.08$5.30$5.480
Apr 25, 2022 – Apr 29, 2022$5.49$5.65$4.65$4.860
May 2, 2022 – May 6, 2022$4.83$5.12$1.50$2.070
May 9, 2022 – May 13, 2022$2.07$2.24$1.66$1.710
May 16, 2022 – May 20, 2022$1.65$1.82$1.34$1.380
May 23, 2022 – May 27, 2022$1.37$1.37$1.17$1.240
May 30, 2022 – Jun 3, 2022$1.33$1.33$1.02$1.040
Jun 6, 2022 – Jun 10, 2022$1.05$1.28$1.00$1.070
Jun 13, 2022 – Jun 17, 2022$1.03$1.05$0.86$0.940
Jun 20, 2022 – Jun 24, 2022$0.94$1.14$0.90$0.940
Jun 27, 2022 – Jul 1, 2022$0.95$0.95$0.73$0.830
Jul 4, 2022 – Jul 8, 2022$0.78$0.84$0.75$0.830
Jul 11, 2022 – Jul 15, 2022$0.84$0.84$0.74$0.790
Jul 18, 2022 – Jul 22, 2022$0.79$0.81$0.75$0.750
Jul 25, 2022 – Jul 29, 2022$0.75$0.80$0.68$0.730
Aug 1, 2022 – Aug 5, 2022$0.74$0.83$0.68$0.800
Aug 8, 2022 – Aug 12, 2022$0.80$1.00$0.75$0.780
Aug 15, 2022 – Aug 19, 2022$0.78$1.11$0.78$0.980
Aug 22, 2022 – Aug 26, 2022$0.98$1.04$0.90$0.910
Aug 29, 2022 – Sep 2, 2022$0.90$0.96$0.71$0.730
Sep 5, 2022 – Sep 9, 2022$0.84$1.90$0.80$1.120
Sep 12, 2022 – Sep 16, 2022$1.11$1.12$0.85$0.900
Sep 19, 2022 – Sep 23, 2022$0.84$3.18$0.81$1.970
Sep 26, 2022 – Sep 30, 2022$2.00$2.32$1.81$2.000
Oct 3, 2022 – Oct 7, 2022$1.99$2.28$1.82$1.870
Oct 10, 2022 – Oct 14, 2022$1.91$2.14$1.87$1.980
Oct 17, 2022 – Oct 21, 2022$1.97$2.15$1.77$1.890
Oct 24, 2022 – Oct 28, 2022$1.91$2.05$1.82$1.970
Oct 31, 2022 – Nov 4, 2022$1.98$2.03$1.85$1.890
Nov 7, 2022 – Nov 11, 2022$1.92$2.15$1.83$2.000
Nov 14, 2022 – Nov 18, 2022$2.01$2.12$1.80$1.870
Nov 21, 2022 – Nov 25, 2022$1.87$1.97$1.83$1.920
Nov 28, 2022 – Dec 2, 2022$1.93$1.96$1.83$1.920
Dec 5, 2022 – Dec 9, 2022$1.87$1.91$1.69$1.750
Dec 12, 2022 – Dec 16, 2022$1.70$1.79$1.64$1.680
Dec 19, 2022 – Dec 23, 2022$1.70$1.70$1.58$1.590
Dec 26, 2022 – Dec 30, 2022$1.57$1.74$1.46$1.730
Jan 2, 2023 – Jan 6, 2023$1.75$1.92$1.71$1.800
Jan 9, 2023 – Jan 13, 2023$1.80$2.01$1.77$2.000
Jan 16, 2023 – Jan 20, 2023$1.97$2.04$1.80$1.880
Jan 23, 2023 – Jan 27, 2023$1.87$1.92$1.81$1.820
Jan 30, 2023 – Feb 3, 2023$1.80$1.93$1.78$1.900
Feb 6, 2023 – Feb 10, 2023$1.87$1.93$1.76$1.790
Feb 13, 2023 – Feb 17, 2023$1.79$1.85$1.67$1.710
Feb 20, 2023 – Feb 24, 2023$1.68$1.70$1.50$1.510
Feb 27, 2023 – Mar 3, 2023$1.50$1.57$1.47$1.490
Mar 6, 2023 – Mar 10, 2023$1.48$1.73$1.42$1.480
Mar 13, 2023 – Mar 17, 2023$1.41$1.53$1.36$1.360
Mar 20, 2023 – Mar 24, 2023$1.39$1.46$1.35$1.430
Mar 27, 2023 – Mar 31, 2023$1.42$1.65$1.35$1.450
Apr 3, 2023 – Apr 6, 2023$1.43$1.57$1.41$1.510
Apr 10, 2023 – Apr 14, 2023$1.51$1.75$1.48$1.720
Apr 17, 2023 – Apr 21, 2023$1.69$1.80$1.64$1.700
Apr 24, 2023 – Apr 28, 2023$1.65$1.79$1.63$1.770
May 1, 2023 – May 5, 2023$1.77$1.99$1.71$1.950
May 8, 2023 – May 12, 2023$1.95$2.00$1.81$1.850
May 15, 2023 – May 19, 2023$1.87$1.91$1.77$1.850
May 22, 2023 – May 26, 2023$1.82$1.94$1.74$1.770
May 29, 2023 – Jun 2, 2023$1.84$1.86$1.73$1.820
Jun 5, 2023 – Jun 9, 2023$1.78$1.82$1.74$1.780
Jun 12, 2023 – Jun 16, 2023$1.77$1.82$1.54$1.560
Jun 19, 2023 – Jun 23, 2023$1.58$1.61$1.41$1.600
Jun 26, 2023 – Jun 30, 2023$1.55$1.56$1.39$1.450
Jul 3, 2023 – Jul 7, 2023$1.45$1.50$1.41$1.460
Jul 10, 2023 – Jul 14, 2023$1.45$1.56$1.45$1.510
Jul 17, 2023 – Jul 21, 2023$1.50$1.53$1.42$1.450
Jul 24, 2023 – Jul 28, 2023$1.44$1.46$1.36$1.420
Jul 31, 2023 – Aug 4, 2023$1.55$1.65$1.50$1.510
Aug 7, 2023 – Aug 11, 2023$1.51$1.52$1.36$1.400
Aug 14, 2023 – Aug 18, 2023$1.41$1.41$1.27$1.280
Aug 21, 2023 – Aug 25, 2023$1.34$1.35$1.27$1.280
Aug 28, 2023 – Sep 1, 2023$1.26$1.66$1.24$1.520
Sep 4, 2023 – Sep 8, 2023$1.52$1.53$1.31$1.360
Sep 11, 2023 – Sep 15, 2023$1.36$1.37$1.26$1.280
Sep 18, 2023 – Sep 22, 2023$1.28$1.28$1.19$1.210
Sep 25, 2023 – Sep 29, 2023$1.22$1.25$1.18$1.210
Oct 2, 2023 – Oct 6, 2023$1.20$1.21$1.13$1.140
Oct 9, 2023 – Oct 13, 2023$1.14$1.21$1.09$1.130
Oct 16, 2023 – Oct 20, 2023$1.13$1.18$1.06$1.070
Oct 23, 2023 – Oct 27, 2023$1.05$1.14$0.99$1.020
Oct 30, 2023 – Nov 3, 2023$1.01$1.23$1.00$1.190
Nov 6, 2023 – Nov 10, 2023$1.20$1.29$1.04$1.110
Nov 13, 2023 – Nov 17, 2023$1.12$1.23$1.06$1.190
Nov 20, 2023 – Nov 24, 2023$1.17$1.25$1.15$1.190
Nov 27, 2023 – Dec 1, 2023$1.21$1.22$1.11$1.170
Dec 4, 2023 – Dec 8, 2023$1.16$1.34$1.16$1.320
Dec 11, 2023 – Dec 15, 2023$1.32$1.35$1.20$1.290
Dec 18, 2023 – Dec 22, 2023$1.29$1.43$1.29$1.350
Dec 25, 2023 – Dec 29, 2023$1.36$1.50$1.33$1.470
Jan 1, 2024 – Jan 5, 2024$1.47$1.55$1.40$1.430
Jan 8, 2024 – Jan 12, 2024$1.40$1.51$1.35$1.450
Jan 15, 2024 – Jan 19, 2024$1.46$1.49$1.38$1.390
Jan 22, 2024 – Jan 26, 2024$1.40$1.61$1.38$1.570
Jan 29, 2024 – Feb 2, 2024$1.56$1.62$1.36$1.460
Feb 5, 2024 – Feb 9, 2024$1.48$1.50$1.33$1.370
Feb 12, 2024 – Feb 16, 2024$1.37$1.55$1.37$1.530
Feb 19, 2024 – Feb 23, 2024$1.56$1.57$1.45$1.510
Feb 26, 2024 – Mar 1, 2024$1.49$1.73$1.49$1.690
Mar 4, 2024 – Mar 8, 2024$1.68$1.77$1.65$1.660
Mar 11, 2024 – Mar 15, 2024$1.68$1.89$1.65$1.790
Mar 18, 2024 – Mar 22, 2024$1.70$1.80$1.65$1.750
Mar 25, 2024 – Mar 28, 2024$1.71$1.76$1.67$1.720
Apr 1, 2024 – Apr 5, 2024$1.70$1.81$1.65$1.650
Apr 8, 2024 – Apr 12, 2024$1.67$1.75$1.62$1.640
Apr 15, 2024 – Apr 19, 2024$1.67$1.68$1.40$1.400
Apr 22, 2024 – Apr 26, 2024$1.40$1.51$1.37$1.460
Apr 29, 2024 – May 3, 2024$1.46$1.67$1.42$1.630
May 6, 2024 – May 10, 2024$1.67$1.72$1.61$1.640
May 13, 2024 – May 17, 2024$1.66$1.69$1.53$1.590
May 20, 2024 – May 24, 2024$1.60$1.60$1.45$1.470
May 27, 2024 – May 31, 2024$1.47$1.48$1.41$1.420
Jun 3, 2024 – Jun 7, 2024$1.41$1.46$1.40$1.410
Jun 10, 2024 – Jun 14, 2024$1.41$1.50$1.30$1.360
Jun 17, 2024 – Jun 21, 2024$1.35$1.38$1.25$1.370
Jun 24, 2024 – Jun 28, 2024$1.34$1.37$1.29$1.300
Jul 1, 2024 – Jul 5, 2024$1.27$1.33$1.27$1.310
Jul 8, 2024 – Jul 12, 2024$1.31$1.45$1.27$1.420
Jul 15, 2024 – Jul 19, 2024$1.42$1.53$1.39$1.400
Jul 22, 2024 – Jul 26, 2024$1.42$1.47$1.37$1.440
Jul 29, 2024 – Aug 2, 2024$1.45$1.45$1.30$1.310
Aug 5, 2024 – Aug 9, 2024$1.30$1.43$1.22$1.280
Aug 12, 2024 – Aug 16, 2024$1.33$1.33$1.17$1.190
Aug 19, 2024 – Aug 23, 2024$1.17$1.47$1.15$1.370
Aug 26, 2024 – Aug 30, 2024$1.39$1.45$1.34$1.370
Sep 2, 2024 – Sep 6, 2024$1.35$1.37$1.28$1.320
Sep 9, 2024 – Sep 13, 2024$1.31$1.39$1.31$1.370
Sep 16, 2024 – Sep 20, 2024$1.37$1.42$1.32$1.330
Sep 23, 2024 – Sep 27, 2024$1.35$1.36$1.24$1.310
Sep 30, 2024 – Oct 4, 2024$1.31$1.39$1.26$1.300
Oct 7, 2024 – Oct 11, 2024$1.30$1.32$1.19$1.250
Oct 14, 2024 – Oct 18, 2024$1.25$1.34$1.20$1.280
Oct 21, 2024 – Oct 25, 2024$1.28$1.35$1.23$1.330
Oct 28, 2024 – Nov 1, 2024$1.31$1.33$1.01$1.180
Nov 4, 2024 – Nov 8, 2024$1.16$1.34$1.14$1.320
Nov 11, 2024 – Nov 15, 2024$1.32$1.34$1.17$1.180
Nov 18, 2024 – Nov 22, 2024$1.20$1.23$1.12$1.160
Nov 25, 2024 – Nov 29, 2024$1.16$1.17$1.10$1.140
Dec 2, 2024 – Dec 6, 2024$1.13$1.20$1.12$1.170
Dec 9, 2024 – Dec 13, 2024$1.15$1.18$1.07$1.070
Dec 16, 2024 – Dec 20, 2024$1.10$1.10$0.95$0.960
Dec 23, 2024 – Dec 27, 2024$0.97$1.05$0.92$1.030
Dec 30, 2024 – Jan 3, 2025$1.01$1.12$0.99$1.100
Jan 6, 2025 – Jan 10, 2025$1.08$1.13$0.96$0.980
Jan 13, 2025 – Jan 17, 2025$0.96$1.01$0.83$0.910
Jan 20, 2025 – Jan 24, 2025$0.93$0.94$0.85$0.870
Jan 27, 2025 – Jan 31, 2025$0.86$0.90$0.84$0.860
Feb 3, 2025 – Feb 7, 2025$0.84$0.95$0.74$0.820
Feb 10, 2025 – Feb 14, 2025$0.81$0.84$0.79$0.820
Feb 17, 2025 – Feb 21, 2025$0.82$0.86$0.81$0.830
Feb 24, 2025 – Feb 28, 2025$0.83$0.83$0.76$0.780
Mar 3, 2025 – Mar 7, 2025$0.77$0.82$0.74$0.780
Mar 10, 2025 – Mar 14, 2025$0.77$0.80$0.73$0.780
Mar 17, 2025 – Mar 21, 2025$0.78$0.83$0.75$0.820
Mar 24, 2025 – Mar 28, 2025$0.82$0.92$0.76$0.770
Mar 31, 2025 – Apr 4, 2025$0.76$0.76$0.56$0.580
Apr 7, 2025 – Apr 11, 2025$0.55$0.64$0.51$0.600
Apr 14, 2025 – Apr 17, 2025$0.61$0.83$0.61$0.750
Apr 21, 2025 – Apr 25, 2025$0.75$0.78$0.63$0.730
Apr 28, 2025 – May 2, 2025$0.73$0.74$0.64$0.650
May 5, 2025 – May 9, 2025$0.65$0.67$0.57$0.620
May 12, 2025 – May 16, 2025$0.60$0.70$0.60$0.650
May 19, 2025 – May 23, 2025$0.65$0.71$0.65$0.700
May 26, 2025 – May 30, 2025$0.69$2.80$0.66$2.500
Jun 2, 2025 – Jun 6, 2025$2.51$2.95$2.42$2.500
Jun 9, 2025 – Jun 13, 2025$2.55$3.06$2.50$2.830
Jun 16, 2025 – Jun 20, 2025$2.84$3.02$2.81$3.020
Jun 23, 2025 – Jun 27, 2025$3.00$3.09$2.79$2.940
Jun 30, 2025 – Jul 3, 2025$2.99$3.03$2.90$2.910
Jul 7, 2025 – Jul 11, 2025$2.91$3.22$2.76$2.810
Jul 14, 2025 – Jul 18, 2025$2.79$2.84$2.35$2.370
Jul 21, 2025 – Jul 25, 2025$2.36$2.45$2.30$2.330
Jul 28, 2025 – Aug 1, 2025$2.30$2.44$2.16$2.300
Aug 4, 2025 – Aug 8, 2025$2.32$2.39$2.11$2.190
Aug 11, 2025 – Aug 15, 2025$2.19$2.38$1.85$1.910
Aug 18, 2025 – Aug 22, 2025$1.91$1.94$1.80$1.870
Aug 25, 2025 – Aug 29, 2025$1.89$2.07$1.83$2.070
Sep 1, 2025 – Sep 5, 2025$2.04$2.19$2.03$2.150
Sep 8, 2025 – Sep 12, 2025$2.16$2.18$1.86$1.900
Sep 15, 2025 – Sep 19, 2025$1.91$2.05$1.87$2.000
Sep 22, 2025 – Sep 26, 2025$2.01$2.05$1.87$1.890
Sep 29, 2025 – Oct 3, 2025$1.89$2.09$1.84$2.050
Oct 6, 2025 – Oct 10, 2025$2.04$2.42$2.02$2.250
Oct 13, 2025 – Oct 17, 2025$2.35$2.52$2.21$2.210
Oct 20, 2025 – Oct 24, 2025$2.22$2.50$2.16$2.210
Oct 27, 2025 – Oct 31, 2025$2.22$2.48$2.21$2.430
Nov 3, 2025 – Nov 7, 2025$2.44$2.48$2.32$2.460
Nov 10, 2025 – Nov 14, 2025$2.45$2.75$2.33$2.410
Nov 17, 2025 – Nov 21, 2025$2.41$2.57$2.21$2.310
Nov 24, 2025 – Nov 28, 2025$2.34$2.42$2.28$2.400
Dec 1, 2025 – Dec 5, 2025$2.33$2.38$2.18$2.260
Dec 8, 2025 – Dec 12, 2025$2.29$2.39$2.26$2.320
Dec 15, 2025 – Dec 19, 2025$2.33$2.42$2.26$2.320
Dec 22, 2025 – Dec 26, 2025$2.32$2.42$2.27$2.320
Dec 29, 2025 – Jan 2, 2026$2.31$2.37$2.27$2.350
Jan 5, 2026 – Jan 9, 2026$2.38$2.66$2.38$2.550
Jan 12, 2026 – Jan 16, 2026$2.53$2.55$2.34$2.410
Jan 19, 2026 – Jan 23, 2026$2.40$2.46$2.31$2.440
Jan 26, 2026 – Jan 30, 2026$2.43$2.47$2.18$2.190
Feb 2, 2026 – Feb 6, 2026$2.15$2.49$2.10$2.420
Feb 9, 2026 – Feb 13, 2026$2.40$2.44$2.28$2.390
Feb 16, 2026 – Feb 20, 2026$2.39$2.41$2.28$2.300
Feb 23, 2026 – Feb 27, 2026$2.32$2.33$2.15$2.170
Mar 2, 2026 – Mar 6, 2026$2.12$2.31$2.11$2.300
Mar 9, 2026 – Mar 13, 2026$2.27$2.64$2.22$2.580
Mar 16, 2026 – Mar 20, 2026$2.57$2.70$2.35$2.370
Mar 23, 2026 – Mar 27, 2026$2.37$2.48$2.28$2.330
Mar 30, 2026 – Apr 2, 2026$2.39$2.48$2.21$2.430
Apr 6, 2026 – Apr 10, 2026$2.44$2.80$2.44$2.670
Apr 13, 2026 – Apr 17, 2026$2.67$2.88$2.62$2.750
Apr 20, 2026 – Apr 24, 2026$2.73$2.93$2.71$2.740
Apr 27, 2026 – May 1, 2026$2.74$2.75$2.47$2.480
May 4, 2026 – May 8, 2026$2.50$2.62$2.41$2.560
May 11, 2026 – May 15, 2026$2.62$2.89$2.37$2.790
May 18, 2026 – May 22, 2026$2.77$2.85$2.50$2.760
May 25, 2026 – May 29, 2026$2.80$3.08$2.75$2.830
Jun 1, 2026 – Jun 5, 2026$2.83$3.07$2.76$2.820
Jun 8, 2026 – Jun 12, 2026$2.84$2.87$2.48$2.850
Jun 15, 2026 – Jun 18, 2026$2.93$3.05$1.95$2.280
Jun 22, 2026 – Jun 26, 2026$2.28$2.36$2.01$2.260
Jun 29, 2026 – Jul 2, 2026$2.26$2.33$2.15$2.200
Jul 6, 2026 – Jul 10, 2026$2.17$2.23$2.05$2.100
Jul 13, 2026 – Jul 17, 2026$2.11$2.34$1.50$1.580
Jul 20, 2026 – Jul 24, 2026$1.57$1.57$1.08$1.190
Jul 27, 2026 – Jul 31, 2026$1.20$1.28$1.15$1.170
Aug 3, 2026 – Aug 7, 2026$1.19$1.28$1.13$1.260
Aug 10, 2026 – Aug 14, 2026$1.25$1.30$1.19$1.230
Aug 17, 2026 – Aug 21, 2026$1.21$1.27$1.18$1.220
Aug 24, 2026 – Aug 28, 2026$1.22$1.26$1.18$1.200
Aug 31, 2026 – Sep 4, 2026$1.20$1.24$1.18$1.210

Valuation

MetricValueUpside
IC Value$2.97+145%
P/E16.86
P/B2.45
P/S2.42
EV/EBITDA12.13
PEG
P/TBV2.45

Valuation history

Annual price overlaid with each model's fair value. Y-axis is log scale.

Annual price and model valuations for SPRO, USD per share
YearPriceAIICGraham-DoddGraham Formula
2011
2012
2013
2014
2015
2016
2017$12.00$28.82
2018$11.75
2019$9.18$21.89
2020$16.74$10.46
2021$8.36$18.42
2022$1.48$115.80
2023$1.66$23.72
2024$0.78$26.05
2025$2.58$21.25

Historic valuation ratios

Pick a category, then toggle metrics to compare.

USD millions

Line items

    USD millions

    Line items

      USD millions

      Line items

        About Spero Therapeutics, Inc.

        Spero Therapeutics, Inc. is a biopharmaceutical firm in the clinical development stage, primarily focused on discovering, advancing, and commercializing innovative treatments for multi-drug resistant (MDR) bacterial infections and rare diseases within the United States. The company's pipeline includes several key therapeutic candidates: tebipenem pivoxil hydrobromide (HBr), an oral carbapenem-class antibiotic designed to address complicated urinary tract infections (cUTIs), including pyelonephritis, in adult patients. SPR206, an intravenously administered agent specifically developed to combat MDR Gram-negative bacterial infections in hospital environments. SPR720, an oral antibiotic targeting non-tuberculous mycobacterial (NTM) pulmonary disease. Spero Therapeutics has also forged several strategic alliances: A licensing agreement with Meiji Seika Pharma Co., Ltd. supports the ongoing development of tebipenem HBr. A separate licensing deal with Everest Medicines grants rights for the development, manufacturing, and commercialization of SPR206 across Greater China, South Korea, and various Southeast Asian nations. The company collaborates with the Bill & Melinda Gates Medical Research Institute to advance SPR720 for treating lung infections caused by Mycobacterium tuberculosis. Furthermore, a licensing agreement with Vertex Pharmaceuticals Incorporated covers patents associated with SPR720 and its active metabolite, SPR719. Founded in 2013, Spero Therapeutics maintains its corporate headquarters in Cambridge, Massachusetts.

        CEO
        Esther Rajavelu
        Employees
        25
        Beta
        1.49

        Peer comparison

        Same-industry comparables, ranked by market cap.

        Scroll horizontally for additional metrics. Ticker column stays fixed.

        Peer comparison for SPRO: basic info, valuation models, ratios, profitability, leverage, growth, cash flow, dividends, enterprise value, and Altman Z-score.
        Basic InfoIC ValuationCore ValuationProfitabilityLeverage & LiquidityGrowthCash FlowDividendsEnterprise ValueRisk
        TickerCompany NamePriceMarket CapValueUpsideP/EP/BP/SEV/EBITDAPEGP/TBVGross MarginOperating MarginNet MarginROEROICROADebt/EquityInterest CoverageCurrent RatioQuick RatioNet Debt/EBITDAEPS GrowthSales GrowthFCF GrowthFCF YieldOp Cash Flow RatioCash ROICDividend YieldDividend PayoutShareholder YieldEV/EBITEV/FCFEV/SalesAltman Z-Score
        SPROSpero Therapeutics, Inc.$1.2672.96M$21.25+1,586%16.862.452.4212.132.45100.00%-0.04%14.38%16.31%-0.24%9.55%0.057.597.40-4.23-111.81%24.27%-46.15%-8.73%-1.42-131.62%0.00%0.00%0.00%-4465.11-8.491.801.48
        ABOSAcumen Pharmaceuticals, I…$2.24161.79M-1.632.81-0.96-9.622.810.00%0.00%0.00%-96.20%-997.16%-67.07%0.44-29.324.073.920.1916.96%34.09%-58.39%-3.85-931.08%0.00%0.00%8.50%-0.91-0.97-5.25
        ACTUActuate Therapeutics Inc$1.1327.04M-2.426.79-1.856.790.00%0.00%0.00%-553.75%336.56%-190.35%0.05-1110.882.392.310.57-67.48%-12.07%-35.69%-3.37287.35%0.00%0.00%7.64%-1.83-2.14-14.75
        CGTXCognition Therapeutics, I…$1.0694.87M-3.252.23-1.732.230.00%0.00%0.00%-88.60%1301.36%-59.75%0.02-3676.853.453.361.56-62.35%-13.66%-32.18%-1.77669.43%0.00%0.00%15.68%-0.84-1.64-4.92
        CRBPCorbus Pharmaceuticals Ho…$9.57177.31M-1.600.850.47-2.640.850.00%0.00%0.00%-54.18%937.58%-48.47%0.018.078.000.3460.33%54.32%-51.47%-3.12708.85%0.00%0.00%10.29%0.430.57-1.62
        HURATuHURA Biosciences, Inc.$2.09133.1M-3.034.35-3.008.930.00%0.00%0.00%-169.18%-315.57%-127.02%0.03-50.850.780.610.10-48.09%87.37%-30.42%-4.67-274.97%0.01%0.00%0.01%-2.77-3.18-2.61
        INOInovio Pharmaceuticals, I…$0.6846.78M$12.28+1,713%-0.923.231191.12-0.353.23100.00%-132871.32%-130000.00%-183.47%447.62%-90.61%0.391.401.340.43-54.18%-69.99%-14.97%-114.24%-2.03458.41%0.00%0.00%0.00%-0.33-0.32439.02-36.84
        IRDOpus Genetics, Inc.$3.78312.1M$15.26+304%-63.11203.92220.47-64.17203.92100.00%-271.90%-349.33%-449.36%144.72%-113.86%0.00-26.336.436.200.94-62.79%29.15%37.84%-1.13%-4.53132.18%0.00%0.00%0.48%-79.92-87.50217.2947.32
        MCRBSeres Therapeutics, Inc.$5.0148.47M13.421.7396.9011.561.73-423.83%-11910.14%721.93%19.64%-120.44%4.10%1.882.562.393.78-103.39%-100.58%1.13%0.061.11%0.00%0.00%30.93%-1.21131.39144.05-11.34
        SEERSeer, Inc.$2.19120.41M$11.52+426%-1.410.406.450.810.4049.67%-483.85%-456.60%-25.08%-72.83%-22.21%0.0912.8412.230.33-7.91%15.57%-6.94%-44.47%-2.83-43.18%0.00%0.00%18.31%0.751.26-3.61-0.57
        VTGNVistaGen Therapeutics, In…$0.3012.19M$18.27+6,052%-0.300.5816.200.33-3.080.58100.00%-5683.69%-5491.33%-131.59%827.99%-104.86%0.033.673.550.429.58%161.11%57.46%-323.87%-5.19764.40%0.00%0.00%0.00%0.330.36-18.75-16.85

        Disclaimer: Information on this page is provided for educational purposes only and does not constitute investment advice. Upside computed as ($2.97 ÷ $1.21) − 1 = +145.45% (IC, example).