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IOSP · Innospec Inc. · Off Exchange

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$97.65 +0.24 (+0.25%) At close · Oct 5
S&P 600 member Russell 2000 member Rebalance outlook locked
Customer concentration — top customer 13.6% of revenue

One customer — 13.6% of revenue (2023)

“In 2023, the Company had a significant customer in the Oilfield Services segment which accounted for $265.2 million and 13.6% of the group's net sales.”
View the 10-K filed Feb 18, 2026
Market Cap
$2.43B
Shares
24.63M
Volume · Oct 5 193.43K Avg daily vol (3M) 182.47K

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start ATS Volume Non-ATS OTC Volume Total Off-Exchange % of FINRA Weekly Volume
2026-08-31 163,311 91,088 254,399 34.7%
2026-08-24 318,192 107,247 425,439 44.7%
2026-08-17 221,841 60,688 282,529 39.2%
2026-08-10 243,514 78,389 321,903 40.1%
2026-08-03 332,495 114,392 446,887 38.2%
2026-07-27 183,532 76,142 259,674 31.9%
2026-07-20 165,112 81,267 246,379 34.7%
2026-07-13 144,751 114,023 258,774 38.2%
2026-07-06 177,867 67,997 245,864 36.2%
2026-06-29 158,673 81,234 239,907 33.8%
2026-06-22 276,426 157,329 433,755 31.1%
2026-06-15 164,530 63,576 228,106 25.1%
2026-06-08 271,978 63,016 334,994 36.2%
2026-06-01 193,471 296,654 490,125 52.4%
2026-05-25 174,150 106,799 280,949 40.5%
2026-05-18 248,310 97,900 346,210 36.5%
2026-05-11 391,093 196,618 587,711 42.7%
2026-05-04 300,315 517,495 817,810 56.8%
2026-04-27 282,867 120,506 403,373 41.1%
2026-04-20 174,730 94,544 269,274 38.8%
2026-04-13 231,971 99,669 331,640 34.6%
2026-04-06 250,822 81,319 332,141 31.8%
2026-03-30 253,705 93,600 347,305 35.5%
2026-03-23 696,135 125,664 821,799 37.2%
2026-03-16 414,049 266,833 680,882 41.0%
2026-03-09 353,145 225,805 578,950 41.8%
2026-03-02 213,829 94,300 308,129 32.4%
2026-02-23 270,498 228,406 498,904 40.3%
2026-02-16 273,856 168,538 442,394 38.3%
2026-02-09 237,084 184,960 422,044 42.4%
2026-02-02 141,811 410,634 552,445 56.4%
2026-01-26 111,977 108,820 220,797 36.9%
2026-01-19 98,064 71,170 169,234 36.4%
2026-01-12 154,874 62,014 216,888 33.5%
2026-01-05 185,567 254,944 440,511 45.5%
2025-12-29 111,478 54,737 166,215 33.5%
2025-12-22 88,028 45,863 133,891 33.8%
2025-12-15 237,536 679,138 916,674 44.0%
2025-12-08 269,218 645,804 915,022 53.8%
2025-12-01 334,609 265,045 599,654 50.8%
2025-11-24 282,664 485,622 768,286 42.7%
2025-11-17 301,068 106,436 407,504 33.9%
2025-11-10 165,254 122,590 287,844 36.2%
2025-11-03 303,679 229,586 533,265 41.0%
2025-10-27 193,682 148,883 342,565 38.2%
2025-10-20 162,348 66,497 228,845 36.2%
2025-10-13 164,083 68,162 232,245 36.1%
2025-10-06 248,889 77,683 326,572 38.0%
Showing 1–48 of 48 weeks
Key facts CIK 1054905 CUSIP 45768S105 13F (30d) 6 filings 6 filers Visit website