Spero Therapeutics, Inc. (SPRO) NASDAQ

Currency In USD

SPRO Historical Return

If you invested $1000 in Spero Therapeutics, Inc. (SPRO) since IPO date, it would be worth $192.61 as of June 23, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $153.29, while $1000 invested 1 year ago would be worth $755.97. This corresponds to total returns of -80.74%, -84.67%, -24.4%, respectively, with annualized returns of -17.35%, -31.26%, -24.4%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

SPRO Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
June 22, 2026	2.28	2.21	2.21	2.36	2.16	2.23M
June 18, 2026	2.51	2.28	2.28	2.51	2.15	7.15M
June 17, 2026	2.87	2.11	2.11	3.05	1.95	11.04M
June 16, 2026	2.94	2.77	2.77	2.98	2.75	1.43M
June 15, 2026	2.93	2.91	2.91	2.97	2.85	932,530
June 12, 2026	2.72	2.85	2.85	2.85	2.7	623,660
June 11, 2026	2.55	2.7	2.7	2.76	2.48	1.16M
June 10, 2026	2.62	2.54	2.54	2.64	2.51	758,307
June 09, 2026	2.78	2.57	2.57	2.81	2.52	1.13M
June 08, 2026	2.84	2.74	2.74	2.87	2.73	647,636
June 05, 2026	3	2.82	2.82	3	2.76	0
June 04, 2026	2.79	2.98	2.98	3.07	2.78	1.02M
June 03, 2026	2.85	2.8	2.8	2.87	2.77	770,220
June 02, 2026	2.81	2.83	2.83	2.87	2.76	605,758
June 01, 2026	2.83	2.83	2.83	2.89	2.79	646,187
May 29, 2026	2.92	2.83	2.83	2.92	2.75	1.34M
May 28, 2026	2.93	2.9	2.9	3	2.9	790,854
May 27, 2026	2.86	2.93	2.93	3.08	2.81	1.77M
May 26, 2026	2.8	2.86	2.86	2.95	2.77	1.51M
May 22, 2026	2.71	2.76	2.76	2.85	2.69	545,468
May 21, 2026	2.63	2.69	2.69	2.71	2.56	433,184
May 20, 2026	2.59	2.63	2.63	2.65	2.55	319,553
May 19, 2026	2.52	2.59	2.59	2.62	2.5	316,359
May 18, 2026	2.77	2.58	2.58	2.79	2.57	917,113
May 15, 2026	2.71	2.79	2.79	2.89	2.69	936,322
May 14, 2026	2.44	2.76	2.76	2.76	2.37	1.61M
May 13, 2026	2.56	2.44	2.44	2.56	2.42	673,441
May 12, 2026	2.51	2.54	2.54	2.56	2.48	350,639
May 11, 2026	2.62	2.55	2.55	2.67	2.54	421,174
May 08, 2026	2.52	2.56	2.56	2.58	2.49	355,452
May 07, 2026	2.54	2.51	2.51	2.62	2.5	566,248
May 06, 2026	2.47	2.53	2.53	2.57	2.44	617,434
May 05, 2026	2.51	2.42	2.42	2.59	2.41	505,587
May 04, 2026	2.5	2.5	2.5	2.61	2.46	461,938
May 01, 2026	2.54	2.48	2.48	2.63	2.48	464,224
April 30, 2026	2.5	2.51	2.51	2.58	2.5	363,622
April 29, 2026	2.65	2.53	2.53	2.66	2.47	828,444
April 28, 2026	2.68	2.67	2.67	2.73	2.67	219,059
April 27, 2026	2.74	2.67	2.67	2.75	2.67	313,109
April 24, 2026	2.82	2.74	2.74	2.82	2.74	346,029
April 23, 2026	2.86	2.8	2.8	2.91	2.79	296,732
April 22, 2026	2.84	2.86	2.86	2.93	2.84	317,797
April 21, 2026	2.82	2.8	2.8	2.82	2.74	263,492
April 20, 2026	2.73	2.84	2.84	2.86	2.71	386,233
April 17, 2026	2.71	2.75	2.75	2.78	2.65	381,043
April 16, 2026	2.64	2.68	2.68	2.71	2.62	550,499
April 15, 2026	2.78	2.64	2.64	2.8	2.63	694,473
April 14, 2026	2.84	2.78	2.78	2.88	2.76	602,534
April 13, 2026	2.67	2.78	2.78	2.86	2.67	514,233
April 10, 2026	2.8	2.67	2.67	2.8	2.63	786,941
April 09, 2026	2.72	2.78	2.78	2.8	2.67	449,288
April 08, 2026	2.7	2.72	2.72	2.75	2.61	426,200
April 07, 2026	2.59	2.67	2.67	2.69	2.48	693,208
April 06, 2026	2.44	2.61	2.61	2.61	2.44	470,620
April 02, 2026	2.41	2.43	2.43	2.45	2.38	214,165
April 01, 2026	2.35	2.45	2.45	2.48	2.34	402,098
March 31, 2026	2.29	2.34	2.34	2.36	2.21	484,058
March 30, 2026	2.39	2.24	2.24	2.43	2.24	311,237
March 27, 2026	2.34	2.33	2.33	2.44	2.28	491,835
March 26, 2026	2.39	2.37	2.37	2.48	2.34	442,926