Innospec Inc. (IOSP) NASDAQ

Currency In USD

IOSP Historical Return

If you invested $1000 in Innospec Inc. (IOSP) 10 years ago, it would be worth $1,845.77 as of September 11, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $1,115.32, while $1000 invested 1 year ago would be worth $1,128.15. This corresponds to total returns of 84.58%, 11.53%, 12.81%, respectively, with annualized returns of 6.32%, 2.21%, 12.81%.

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

IOSP Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
September 10, 2026	93.9	93.08	93.08	94.35	92	102,037
September 09, 2026	92.74	93.57	93.57	94.05	92.4	127,186
September 08, 2026	93.28	93.37	93.37	96.14	92.49	135,641
September 04, 2026	92.43	93.95	93.95	94.28	92.4	103,256
September 03, 2026	94.36	93.12	93.12	94.55	92.44	190,509
September 02, 2026	92.6	93.76	93.76	95.38	92.51	156,433
September 01, 2026	93.12	92.61	92.61	93.87	92.3	122,268
August 31, 2026	95.49	93.86	93.86	95.95	93.62	160,602
August 28, 2026	95.73	95.38	95.38	96.68	94.92	163,826
August 27, 2026	94.7	95.34	95.34	96.41	93.91	193,856
August 26, 2026	94.51	95.66	95.66	96.14	94.16	224,635
August 25, 2026	94.73	94.36	94.36	94.78	93.14	180,468
August 24, 2026	93.7	94.73	94.73	94.98	92.81	189,624
August 21, 2026	93.71	93.63	93.63	93.88	92.76	120,050
August 20, 2026	92.83	92.92	92.92	94.58	91.8	101,335
August 19, 2026	94.47	93.76	93.76	95.01	93.06	108,207
August 18, 2026	93.86	93.56	93.56	94.65	93.05	208,979
August 17, 2026	93.08	93.83	93.83	94.18	93.07	181,953
August 14, 2026	93.82	93.85	93.85	94.41	93.44	104,725
August 13, 2026	93.54	93.92	93.92	94.67	93.28	126,188
August 12, 2026	93.93	93.12	93.12	94.45	92.69	210,920
August 11, 2026	93.22	93.97	93.97	94.56	92.55	205,594
August 10, 2026	91.88	92.89	92.89	93.61	91.84	155,868
August 07, 2026	91.67	92.44	92.44	92.61	89.65	162,906
August 06, 2026	92.5	91.53	91.53	94.17	90.93	285,543
August 05, 2026	90.28	91.96	91.96	93.34	88.05	392,351
August 04, 2026	85.53	86.7	86.7	87.03	85.04	174,790
August 03, 2026	86.22	85.48	85.48	87.85	85.42	154,716
July 31, 2026	85.29	85.98	85.98	86.26	83.78	205,533
July 30, 2026	85.28	86.07	86.07	86.5	84.66	140,705
July 29, 2026	85.64	84.95	84.95	86.36	84.59	140,487
July 28, 2026	86.38	85.9	85.9	87.69	85.66	133,860
July 27, 2026	84.94	85.63	85.63	85.85	84.15	193,256
July 23, 2026	84.41	84.09	84.09	86.13	82.89	138,188
July 22, 2026	84.63	85.3	85.3	85.72	84.21	139,512
July 21, 2026	83.49	84.5	84.5	84.81	83.2	156,230
July 20, 2026	83.98	83.95	83.95	84.54	83.05	117,081
July 17, 2026	85.46	84.25	84.25	86.64	83.94	146,409
July 16, 2026	83.17	85.46	85.46	85.58	83.17	184,124
July 15, 2026	81.99	83.02	83.02	83.22	81.86	142,360
July 14, 2026	82.39	81.64	81.64	82.85	81.45	102,559
July 13, 2026	81.93	82.03	82.03	82.89	81.39	101,603
July 10, 2026	80.86	81.62	81.62	82.42	80.86	117,625
July 09, 2026	80.63	80.72	80.72	82	79.44	161,053
July 08, 2026	81.27	80.81	80.81	81.39	79.74	146,555
July 07, 2026	82.69	81.66	81.66	82.69	81.2	117,069
July 06, 2026	82.72	82.41	82.41	82.95	81.57	137,694
July 02, 2026	81.93	83.1	83.1	83.12	81.54	116,323
July 01, 2026	81.49	81.77	81.77	82.52	80.93	169,462
June 30, 2026	81	81.39	81.39	82.09	80.55	205,600
June 29, 2026	82.07	80.71	80.71	82.38	80.24	209,261
June 26, 2026	82.93	82.63	82.63	83.25	80.65	658,201
June 25, 2026	82.85	82.81	82.81	84.29	80.86	229,542
June 24, 2026	81.84	83.39	83.39	84.02	81.2	189,107
June 23, 2026	82.47	81.84	81.84	83.7	81.67	179,235
June 22, 2026	82.42	82.47	82.47	83.22	82.07	140,558
June 18, 2026	83.7	82.73	82.73	83.84	82.28	323,429
June 17, 2026	83.33	83.11	83.11	84.84	82.86	173,525
June 16, 2026	85.89	83.74	83.74	86.24	83.33	177,262
June 15, 2026	86.7	85.11	85.11	87.82	84.92	234,876