Why Innospec Inc. (IOSP) stock fell 18.7% on Wednesday, November 4, 2026

Innospec Inc. (IOSP) closed at $80.65, down 18.72% on Wednesday, November 4, 2026, on volume of 482,108 shares (2.3× its 3-month average); market value about $2.00B.

What happened: primary sources

Events Nexqual found for IOSP on Wednesday, November 4, 2026 or the trading day before (November 3, 2026):

• Nov 3, 2026: Reported Q3 2026 results: adjusted EPS $1.29 vs consensus $1.26 (beat), revenue $473.6M vs consensus $479.2M (miss). Guidance: The company expects improvement in several areas to drive sequential operating income growth in the fourth quarter. source

These are listed as context. A filing or rating change on the same day is not proof that it caused the move; read the source.

More on IOSP

IOSP stock page: price, SEC financials, insider trades, superinvestor holders, analyst estimates and options. Earnings report: IOSP results, November 3, 2026. Other big moves that day: November 4, 2026.

Sources: SEC EDGAR, Nexqual Earnings Flash, analyst rating changes, Nexqual market data. Built November 10, 2026 at 16:46 UTC. Not investment advice.

Data source: Nexqual. Last updated: November 10, 2026 at 16:46 UTC. This page is informational and not investment advice.

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