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Innospec (IOSP, Specialty chemical makers) Stock Valuation & Fair Value

Mixed on our tests

Innospec (IOSP, Specialty chemical makers) trades at a current P/E of 15.5, about 6% above its historical normal valuation, with a forward growth estimate of 16.8% and a PEG of 0.92. Analysts' one-year estimates have been hit 27% of the time. Priced at its historical normal P/E of 14.7 on the same blended earnings, the 2026-11-06 close of $78.21 corresponds to about $74.10 a share. This is a valuation reference, not a price target.

How to read these numbers: the PEG ratio and current P/E versus normal P/E.

Current P/E
15.5
Normal P/E
14.7
PEG
0.92
Fwd growth
16.8%
Div yield
2.3%
RSI (14)
17.6
Oversold
Technical context
  • Price $78.21 at the Nov 6 close, 18.3% below the 20-day average ($95.78) and 17.9% below the 50-day ($95.30).
  • RSI (14) at 17.6.
  • 52-week range $65.12 to $101.41: the price is 22.9% below the high and 20.1% above the low.

The Street vs SeerForecast

Wall Street's mean price target for IOSP is $101.00 across 3 analysts, 29.1% above the current price. Our SeerForecast read of the same stock, formed without analyst targets: mixed on our tests. When the two disagree, start your digging there.

Valuation flags

Verdict history

tickerseer's rating moved from mixed on our tests (2026-07-31) to trading above its usual valuation (2026-11-02).

Current P/E and rating by weekCurrent P/E moved from 17.2 to 19.8 between 2026-07-31 and 2026-10-30, against a normal P/E of 14.7, with 1 rating change over 14 recorded weeks.2026-07-31: P/E 17.2, Mixed on our tests, recalculated for the week of 2026-07-312026-07-31: P/E 17.2, Mixed on our tests, recorded live 2026-08-032026-08-07: P/E 17.2, Mixed on our tests, recalculated for the week of 2026-08-072026-08-07: P/E 18.1, Trading above its usual valuation, recorded live 2026-08-102026-08-14: P/E 18.1, Trading above its usual valuation, recalculated for the week of 2026-08-142026-08-14: P/E 18.4, Trading above its usual valuation, recorded live 2026-08-172026-08-21: P/E 18.4, Trading above its usual valuation, recalculated for the week of 2026-08-212026-08-21: P/E 18.4, Trading above its usual valuation, recorded live 2026-08-242026-08-27: P/E 18.4, Trading above its usual valuation, recalculated for the week of 2026-08-272026-08-28: P/E 18.4, Trading above its usual valuation, recalculated for the week of 2026-08-282026-08-28: P/E 18.4, Trading above its usual valuation, recalculated for the week of 2026-08-302026-08-28: P/E 18.7, Trading above its usual valuation, recorded live 2026-08-312026-09-04: P/E 18.7, Trading above its usual valuation, recalculated for the week of 2026-09-052026-09-04: P/E 18.5, Trading above its usual valuation, recorded live 2026-09-072026-09-11: P/E 18.5, Trading above its usual valuation, recalculated for the week of 2026-09-122026-09-11: P/E 18.3, Trading above its usual valuation, recorded live 2026-09-142026-09-18: P/E 18.3, Trading above its usual valuation, recalculated for the week of 2026-09-192026-09-18: P/E 18.4, Trading above its usual valuation, recorded live 2026-09-212026-09-25: P/E 18.4, Trading above its usual valuation, recalculated for the week of 2026-09-262026-09-25: P/E 19.5, Trading above its usual valuation, recorded live 2026-09-282026-10-02: P/E 19.5, Trading above its usual valuation, recalculated for the week of 2026-10-032026-10-02: P/E 19.2, Trading above its usual valuation, recorded live 2026-10-052026-10-09: P/E 19.2, Trading above its usual valuation, recalculated for the week of 2026-10-102026-10-09: P/E 18.9, Trading above its usual valuation, recorded live 2026-10-122026-10-16: P/E 18.9, Trading above its usual valuation, recalculated for the week of 2026-10-172026-10-16: P/E 19.1, Trading above its usual valuation, recorded live 2026-10-192026-10-23: P/E 19.5, Trading above its usual valuation, recorded live 2026-10-262026-10-30: P/E 19.5, Trading above its usual valuation, recalculated for the week of 2026-10-312026-10-30: P/E 19.8, Trading above its usual valuation, recorded live 2026-11-0216.018.0Jul 31Aug 23Sep 15Oct 7Oct 30Normal P/E 14.7
Mixed on our testsTrading above its usual valuation

Not every point was recorded live. Points marked recalculated are worked out from the metrics tickerseer archived that week.

Selected weeks: the first, the latest, every week the rating moved, and the cheapest and dearest.

WeekCurrent P/EPremium to normal P/ERating
2026-07-31P/E 17.2+17%Mixed on our tests (recalculated)
2026-08-03P/E 17.2+17%Mixed on our tests
2026-08-10P/E 18.1+23%Trading above its usual valuation
2026-11-02P/E 19.8+35%Trading above its usual valuation ← now
Show all 29 readings
WeekCurrent P/EPremium to normal P/ERating
2026-07-31P/E 17.2+17%Mixed on our tests (recalculated)
2026-08-03P/E 17.2+17%Mixed on our tests
2026-08-07P/E 17.2+17%Mixed on our tests (recalculated)
2026-08-10P/E 18.1+23%Trading above its usual valuation
2026-08-14P/E 18.1+23%Trading above its usual valuation (recalculated)
2026-08-17P/E 18.4+25%Trading above its usual valuation
2026-08-21P/E 18.4+25%Trading above its usual valuation (recalculated)
2026-08-24P/E 18.4+25%Trading above its usual valuation
2026-08-27P/E 18.4+25%Trading above its usual valuation (recalculated)
2026-08-28P/E 18.4+25%Trading above its usual valuation (recalculated)
2026-08-30P/E 18.4+25%Trading above its usual valuation (recalculated)
2026-08-31P/E 18.7+28%Trading above its usual valuation
2026-09-05P/E 18.7+28%Trading above its usual valuation (recalculated)
2026-09-07P/E 18.5+26%Trading above its usual valuation
2026-09-12P/E 18.5+26%Trading above its usual valuation (recalculated)
2026-09-14P/E 18.3+25%Trading above its usual valuation
2026-09-19P/E 18.3+25%Trading above its usual valuation (recalculated)
2026-09-21P/E 18.4+25%Trading above its usual valuation
2026-09-26P/E 18.4+25%Trading above its usual valuation (recalculated)
2026-09-28P/E 19.5+32%Trading above its usual valuation
2026-10-03P/E 19.5+32%Trading above its usual valuation (recalculated)
2026-10-05P/E 19.2+31%Trading above its usual valuation
2026-10-10P/E 19.2+31%Trading above its usual valuation (recalculated)
2026-10-12P/E 18.9+29%Trading above its usual valuation
2026-10-17P/E 18.9+29%Trading above its usual valuation (recalculated)
2026-10-19P/E 19.1+30%Trading above its usual valuation
2026-10-26P/E 19.5+33%Trading above its usual valuation
2026-10-31P/E 19.5+33%Trading above its usual valuation (recalculated)
2026-11-02P/E 19.8+35%Trading above its usual valuation ← now

Frequently asked questions

Is Innospec stock overvalued?

At a current P/E of 15.5 versus its historical normal P/E of 14.7, Innospec trades about 6% above its typical valuation, with a PEG of 0.92 on 16.8% forward growth. tickerseer currently rates it mixed on our tests.

What is Innospec's fair value and PEG?

Innospec trades at a current P/E of 15.5 against a historical normal P/E of 14.7, a PEG of 0.92, and a forward growth estimate of 16.8%. Priced at its historical normal P/E of 14.7 on the same blended earnings, the 2026-11-06 close of $78.21 corresponds to about $74.10 a share. This is a valuation reference, not a price target.

Has tickerseer's rating of Innospec changed?

tickerseer's rating moved from mixed on our tests (2026-07-31) to trading above its usual valuation (2026-11-02).

What is the analyst price target for Innospec?

The mean Wall Street price target for Innospec is $101.00 across 3 analysts, 29.1% above the current price. tickerseer's SeerForecast verdict is formed independently of analyst targets.

Industry: Specialty chemical makers. Create a free account to see the full analysis: the SeerAI score, its five quality sub-scores, valuation history, and an AI research note where we have one. Options setups and metric history are part of the paid plans.

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