NASDAQ:IOSP | Historical Stock Price | INNOSPEC INC.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1998-05-13 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$3.25$7.20$15.96$35.36$78.36$173.651998-05-132026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$76.54$101.36127,500
2025-12-30$78.14$103.48121,500
2025-12-29$78.56$104.04105,400
2025-12-26$78.40$103.8383,100
2025-12-24$78.12$103.4645,200
2025-12-23$78.08$103.40122,200
2025-12-22$77.88$103.14145,800
2025-12-19$77.63$102.81887,000
2025-12-18$79.31$105.03308,900
2025-12-17$78.96$104.57373,800
2025-12-16$77.99$103.28266,100
2025-12-15$78.38$103.80248,500
2025-12-12$78.19$103.55194,700
2025-12-11$78.62$104.12558,600
2025-12-10$78.48$103.93377,100
2025-12-09$75.97$100.61327,600
2025-12-08$74.95$99.26243,400
2025-12-05$75.04$99.38230,600
2025-12-04$74.01$98.01116,100
2025-12-03$74.85$99.13202,200
2025-12-02$74.37$98.49285,900
2025-12-01$74.01$98.01344,900
2025-11-28$74.76$99.0196,500
2025-11-26$74.55$98.73780,700
2025-11-25$74.53$98.70275,300
2025-11-24$71.05$94.09648,700
2025-11-21$72.13$95.52257,500
2025-11-20$70.62$93.52211,700
2025-11-19$70.87$93.85250,900
2025-11-18$71.15$94.23250,000
2025-11-17$72.23$94.50233,500
2025-11-14$74.09$96.94145,200
2025-11-13$74.77$97.83132,600
2025-11-12$74.86$97.94227,500
2025-11-11$75.66$98.9989,800
2025-11-10$75.07$98.22200,700
2025-11-07$76.46$100.04249,800
2025-11-06$73.49$96.15351,500
2025-11-05$74.01$96.83275,500
2025-11-04$72.26$94.54212,700
2025-11-03$73.65$96.36209,900
2025-10-31$73.58$96.27175,500
2025-10-30$73.10$95.64210,400
2025-10-29$73.48$96.14240,800
2025-10-28$75.26$98.47167,900
2025-10-27$75.22$98.42102,000
2025-10-24$76.31$99.84130,000
2025-10-23$75.65$98.98109,100
2025-10-22$75.89$99.29153,400
2025-10-21$74.84$97.9298,500
2025-10-20$74.39$97.33141,300
2025-10-17$74.08$96.92116,900
2025-10-16$74.19$97.07165,900
2025-10-15$74.93$98.04126,500
2025-10-14$74.43$97.38111,500
2025-10-13$74.52$97.50123,400
2025-10-10$73.92$96.71178,400
2025-10-09$76.29$99.82215,900
2025-10-08$78.50$102.71133,100
2025-10-07$78.10$102.18156,800
2025-10-06$78.81$103.11175,300
2025-10-03$78.78$103.07275,500
2025-10-02$78.61$102.85274,400
2025-10-01$76.83$100.52307,700
2025-09-30$77.16$100.95176,100
2025-09-29$77.06$100.82202,100
2025-09-26$77.54$101.45603,400
2025-09-25$77.59$101.52130,900
2025-09-24$78.60$102.84156,800
2025-09-23$79.29$103.74192,400
2025-09-22$79.21$103.64199,000
2025-09-19$79.55$104.08773,600
2025-09-18$82.09$107.40202,600
2025-09-17$80.62$105.48201,400
2025-09-16$81.23$106.28237,400
2025-09-15$80.62$105.48206,600
2025-09-12$82.69$108.19153,500
2025-09-11$83.65$109.45189,800
2025-09-10$83.08$108.70153,500
2025-09-09$83.55$109.31139,800
2025-09-08$85.20$111.47244,400
2025-09-05$85.72$112.15145,500
2025-09-04$85.86$112.34125,300
2025-09-03$85.81$112.27199,000
2025-09-02$87.09$113.95118,100
2025-08-29$87.59$114.60124,800
2025-08-28$87.59$114.60177,600
2025-08-27$87.73$114.78155,800
2025-08-26$85.93$112.43171,200
2025-08-25$86.62$113.33218,800
2025-08-22$87.12$113.99144,500
2025-08-21$83.99$109.89117,800
2025-08-20$83.65$109.45100,800
2025-08-19$84.17$110.13222,300
2025-08-18$83.30$108.9993,800
2025-08-15$82.94$108.52296,200
2025-08-14$83.47$109.21199,500
2025-08-13$85.02$111.24133,600
2025-08-12$82.61$108.08157,400
2025-08-11$81.17$106.20219,100
2025-08-08$81.44$106.55202,500
2025-08-07$79.81$104.42230,000
2025-08-06$78.25$102.38356,100
2025-08-05$80.73$105.62182,900
2025-08-04$79.35$103.82162,600
2025-08-01$78.55$102.77238,500
2025-07-31$79.90$104.54222,000
2025-07-30$80.74$105.64192,200
2025-07-29$82.05$107.35252,900
2025-07-28$83.22$108.88257,900
2025-07-25$84.38$110.40253,000
2025-07-24$84.18$110.14118,900
2025-07-23$85.82$112.28168,200
2025-07-22$84.74$110.87200,500
2025-07-21$83.55$109.31158,300
2025-07-18$83.02$108.62175,700
2025-07-17$85.01$111.22237,100
2025-07-16$84.53$110.60169,100
2025-07-15$85.08$111.32111,600
2025-07-14$87.51$114.50113,300
2025-07-11$88.26$115.48136,400
2025-07-10$89.32$116.86162,800
2025-07-09$89.23$116.75231,000
2025-07-08$88.78$116.16392,700
2025-07-07$86.47$113.13194,400
2025-07-03$88.70$116.0580,200
2025-07-02$88.11$115.28259,200
2025-07-01$87.07$113.92206,700
2025-06-30$84.09$110.02285,900
2025-06-27$84.28$110.27933,400
2025-06-26$84.37$110.39129,600
2025-06-25$83.50$109.25163,100
2025-06-24$83.91$109.79171,100
2025-06-23$83.64$109.43163,200
2025-06-20$82.54$107.99467,300
2025-06-18$82.82$108.36178,800
2025-06-17$83.18$108.83230,800
2025-06-16$84.41$110.44160,200
2025-06-13$84.77$110.91205,000
2025-06-12$87.18$114.06156,800
2025-06-11$88.36$115.61278,500
2025-06-10$88.84$116.24342,200
2025-06-09$87.52$114.51262,100
2025-06-06$86.13$112.69209,400
2025-06-05$85.29$111.59148,400
2025-06-04$86.16$112.73102,500
2025-06-03$86.70$113.44153,300
2025-06-02$85.14$111.39173,100
2025-05-30$85.08$111.32171,900
2025-05-29$86.10$112.65155,700
2025-05-28$85.64$112.05143,100
2025-05-27$87.85$114.94176,800
2025-05-23$85.58$111.97126,300
2025-05-22$86.15$112.72191,500
2025-05-21$85.96$112.47194,400
2025-05-20$88.33$115.57125,300
2025-05-19$89.12$115.50148,700
2025-05-16$88.99$115.33270,500
2025-05-15$88.27$114.40178,300
2025-05-14$87.78$113.77204,200
2025-05-13$90.45$117.23242,900
2025-05-12$90.70$117.55241,900
2025-05-09$90.51$117.30193,400
2025-05-08$93.40$121.05176,900
2025-05-07$92.04$119.29117,000
2025-05-06$92.54$119.94124,200
2025-05-05$92.24$119.55138,200
2025-05-02$92.24$119.5599,400
2025-05-01$90.02$116.67125,100
2025-04-30$89.48$115.97160,100
2025-04-29$89.90$116.51277,000
2025-04-28$89.80$116.38135,400
2025-04-25$89.79$116.37131,600
2025-04-24$90.33$117.07178,000
2025-04-23$88.36$114.52249,000
2025-04-22$88.44$114.62128,100
2025-04-21$86.70$112.37140,400
2025-04-17$85.92$111.36145,600
2025-04-16$85.48$110.79138,100
2025-04-15$87.23$113.05254,600
2025-04-14$87.47$113.36101,800
2025-04-11$87.47$113.36146,000
2025-04-10$86.52$112.13154,700
2025-04-09$89.88$116.49318,800
2025-04-08$83.39$108.08276,900
2025-04-07$85.19$110.41323,900
2025-04-04$85.83$111.24309,700
2025-04-03$88.45$114.63195,500
2025-04-02$95.65$123.97148,700
2025-04-01$94.54$122.53238,000
2025-03-31$94.75$122.80196,700
2025-03-28$95.20$123.38123,600
2025-03-27$97.39$126.22159,300
2025-03-26$98.24$127.32218,100
2025-03-25$97.36$126.18280,300
2025-03-24$98.28$127.37482,500
2025-03-21$96.01$124.431,456,600
2025-03-20$98.42$127.56335,100
2025-03-19$98.57$127.75350,600
2025-03-18$98.70$127.92328,000
2025-03-17$99.17$128.53408,700
2025-03-14$98.09$127.13450,300
2025-03-13$96.80$125.46239,200
2025-03-12$97.63$126.53383,600
2025-03-11$99.83$129.38336,900
2025-03-10$98.54$127.71175,100
2025-03-07$100.62$130.41176,600
2025-03-06$99.54$129.01271,500
2025-03-05$98.16$127.22312,600
2025-03-04$97.77$126.71188,400
2025-03-03$99.40$128.83201,800
2025-02-28$103.41$134.02218,000
2025-02-27$104.01$134.80127,400
2025-02-26$103.57$134.23171,500
2025-02-25$104.38$135.28216,400
2025-02-24$101.99$132.18260,100
2025-02-21$103.36$133.96281,000
2025-02-20$103.15$133.69278,300
2025-02-19$102.20$132.46466,400
2025-02-18$109.88$142.41134,300
2025-02-14$108.19$140.22154,200
2025-02-13$111.80$144.9079,900
2025-02-12$109.63$142.0890,200
2025-02-11$111.60$144.6466,100
2025-02-10$110.99$143.85105,900
2025-02-07$110.96$143.8178,200
2025-02-06$112.82$146.2293,100
2025-02-05$113.53$147.1495,700
2025-02-04$114.75$148.72141,200
2025-02-03$111.43$144.42115,000
2025-01-31$113.35$146.91147,700
2025-01-30$115.61$149.84133,000
2025-01-29$114.96$148.99160,300
2025-01-28$114.96$148.99134,300
2025-01-27$114.77$148.75165,600
2025-01-24$114.43$148.3197,400
2025-01-23$115.45$149.63130,200
2025-01-22$115.25$149.37125,700
2025-01-21$116.61$151.1389,600
2025-01-17$114.47$148.3697,300
2025-01-16$112.90$146.32124,600
2025-01-15$113.06$146.53145,800
2025-01-14$111.44$144.43106,400
2025-01-13$107.92$139.8792,300
2025-01-10$105.21$136.3697,900
2025-01-08$106.62$138.1863,300
2025-01-07$106.55$138.0981,900
2025-01-06$107.71$139.6084,800
2025-01-03$108.90$141.1490,600
2025-01-02$107.64$139.5178,400