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See every IOSP insider filing — free account, no card.
Free accountINNOSPEC INC. (IOSP) has 6 SEC Form 4 insider filings on record in the last 90 days. Most recent filing: Oct. 5, 2026.
Open-market value, last 90 days
No open-market buys or sales in this period.
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Oct 5, 2026 SEC filing | BARNES CORBIN SVP, Corporate Dev and IR | Holdings only | — | — |
| Oct 5, 2026 SEC filing | GRIFFIN HARDY LOUIS III SVP, HUMAN RESOURCES | Holdings only | — | — |
| Oct 5, 2026 SEC filing | Cleminson Ian EVP & CFO | Holdings only | — | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.