NASDAQ:IOSP | Stock Price History | 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.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$92.993,300
2026-09-03$94.106,279
2026-09-02$93.496,653
2026-09-01$93.622,931
2026-08-31$95.124,820
2026-08-28$95.9615,944
2026-08-27$95.34$127.75193,900$94.3812,305
2026-08-26$95.66$128.18224,600$94.9812,372
2026-08-25$94.36$126.43180,500$95.398,253
2026-08-24$94.73$126.93189,600$94.415,921
2026-08-21$93.63$125.46120,100$93.953,432
2026-08-20$92.92$124.51101,300$92.473,850
2026-08-19$93.76$125.63108,200$94.965,518
2026-08-18$93.56$125.36209,000$94.4312,636
2026-08-17$93.83$125.72182,000$93.2010,603
2026-08-14$93.85$125.75104,700$94.3910,510
2026-08-13$93.92$125.85126,200$93.615,836
2026-08-12$93.12$124.77210,900$94.0317,160
2026-08-11$93.97$125.91205,600$93.0628,316
2026-08-10$92.89$124.46155,900$92.905,748
2026-08-07$92.44$123.86162,900$92.134,671
2026-08-06$91.53$122.64285,500$92.0011,585
2026-08-05$91.96$123.22392,400$90.1311,878
2026-08-04$86.70$116.17174,800$85.185,985
2026-08-03$85.48$114.54154,700$85.764,454
2026-07-31$85.98$115.21205,500$85.226,295
2026-07-30$86.07$115.33140,700$86.424,669
2026-07-29$84.95$113.83140,500$85.166,169
2026-07-28$85.90$115.10133,900$85.983,978
2026-07-27$85.63$114.74193,300$84.825,926
2026-07-24$84.76$113.57159,400$84.407,542
2026-07-23$84.09$112.67138,200$84.945,522
2026-07-22$85.30$114.29139,500$85.056,324
2026-07-21$84.50$113.22156,200$83.755,897
2026-07-20$83.95$112.49117,100$83.706,046
2026-07-17$84.25$112.89146,400
2026-07-16$85.46$114.51184,100
2026-07-15$83.02$111.24142,400
2026-07-14$81.64$109.39102,600
2026-07-13$82.03$109.91101,600
2026-07-10$81.62$109.36117,600
2026-07-09$80.72$108.16161,100
2026-07-08$80.81$108.28146,600
2026-07-07$81.66$109.42117,100
2026-07-06$82.41$110.42137,700
2026-07-02$83.10$111.35116,300
2026-07-01$81.77$109.57169,500
2026-06-30$81.39$109.06213,700
2026-06-29$80.71$108.14209,400
2026-06-26$82.63$110.72658,200
2026-06-25$82.81$110.96229,500
2026-06-24$83.39$111.74189,100
2026-06-23$81.84$109.66179,200
2026-06-22$82.47$110.50140,600
2026-06-18$82.73$110.85323,400
2026-06-17$83.11$111.36173,500
2026-06-16$83.74$112.20177,300
2026-06-15$85.11$114.04234,900
2026-06-12$86.59$116.02205,100
2026-06-11$85.86$115.05183,400
2026-06-10$83.35$111.68233,800
2026-06-09$82.83$110.99196,400
2026-06-08$81.38$109.04106,800
2026-06-05$80.68$108.10120,300
2026-06-04$80.65$108.06171,800
2026-06-03$80.60$108.00364,800
2026-06-02$81.65$109.40123,600
2026-06-01$81.93$109.78155,500
2026-05-29$82.94$111.13275,000
2026-05-28$82.29$110.26116,600
2026-05-27$82.29$110.26151,200
2026-05-26$81.96$109.82151,000
2026-05-22$79.58$106.63199,300
2026-05-21$78.73$105.49187,800
2026-05-20$78.66$105.40231,100
2026-05-19$76.87$103.00163,300
2026-05-18$79.05$104.69167,300
2026-05-15$78.15$103.50304,600
2026-05-14$80.00$105.95232,300
2026-05-13$79.69$105.54366,800
2026-05-12$80.44$106.53217,900
2026-05-11$80.82$107.03254,400
2026-05-08$80.55$106.67680,300
2026-05-07$76.64$101.50197,600
2026-05-06$77.67$102.86245,700
2026-05-05$78.19$103.55160,900
2026-05-04$76.48$101.28155,300
2026-05-01$76.83$101.75290,200
2026-04-30$76.26$100.99193,700
2026-04-29$75.61$100.13174,100
2026-04-28$76.64$101.50120,000
2026-04-27$77.68$102.87203,400
2026-04-24$77.15$102.17153,100
2026-04-23$76.66$101.52145,300
2026-04-22$74.97$99.28153,900
2026-04-21$75.47$99.95117,200
2026-04-20$75.48$99.96124,700
2026-04-17$76.19$100.90174,600
2026-04-16$75.09$99.44155,000
2026-04-15$74.66$98.87230,000