IOSP vs WLK
As of Sep 20, 2026, Innospec (IOSP) scores 6.3/10 and Westlake (WLK) 1.4/10 on AlphaStocks' five-model composite, so IOSP scores higher. IOSP trades 3% below its model fair value; WLK trades 6% below its model fair value.
IOSP
INNOSPEC INC.
6.3
Consider Buy
$93.12
WLK
WESTLAKE CORP
1.4
Avoid
$69.15
IOSP vs WLK: Which is the Better Investment?
INNOSPEC INC. (IOSP) scores 6.3/10 while WESTLAKE CORP (WLK) scores 1.4/10 on AlphaStocks' composite model. INNOSPEC INC. has the higher composite rating of Consider Buy. WESTLAKE CORP trades further below its estimated fair value.
This comparison is algorithmically generated and is not financial advice.
| Metric | IOSP | WLK |
|---|---|---|
| Scores & Fundamentals | ||
| Composite Score | 6.3/10▲ | 1.4/10 |
| Rating | Consider Buy▲ | Avoid |
| Price | $93.12 | $69.15 |
| P/E Ratio | 20.0 | — |
| ROE | 8.9%▲ | -16.6% |
| Market Cap | $2B | $9B |
| Fair Value | $96.11 | $73.43 |
| Dividend Yield | 2.1% | 2.8%▲ |
| Sector Rank | #8 of 78▲ | #77 of 78 |
| Model Verdicts | ||
| Piotroski | Attractive▲ | Neutral |
| Buffett | Neutral▲ | Caution |
| Graham | Neutral | Neutral |
| Lynch | Attractive▲ | Neutral |
| Greenblatt | Limited Data | Caution▲ |
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IOSP vs WLK: Which Stock Scores Higher?
INNOSPEC INC. (IOSP) and WESTLAKE CORP (WLK) are both in the Materials sector. IOSP currently leads with a composite score of 6.3/10 (Consider Buy) compared to WLK's 1.4/10 (Avoid).
The AlphaStocks composite score evaluates each stock across four dimensions: Quality (business strength measured by Piotroski F-Score and Buffett quality criteria), Value (discount to intrinsic worth using Graham, Lynch, and Greenblatt models), Momentum (6-month price trend), and Timing (a confirmation signal that requires both value and momentum to align). A higher composite score indicates stronger overall fundamentals combined with favorable market conditions.
This comparison uses the same scoring framework for both companies, ensuring an apples-to-apples evaluation. Scores are recalculated daily after market close using data from SEC filings and market prices. Read the full methodology to understand how each model contributes to the composite score.
Scores are algorithm-generated research tools, not investment recommendations. Past performance does not guarantee future results. Always do your own due diligence. Full disclaimer