Atmus Filtration Technologies (ATMU) is back in focus after reporting second quarter 2026 results that showed higher sales and net income compared with a year earlier, along with raised full year earnings guidance.

Despite higher earnings guidance and an increased dividend, Atmus Filtration Technologies’ share price is down 8.66% over the past week and 5% year to date. However, the 1 year total shareholder return of 10.68% and 3 year total shareholder return of 118.64% indicate that longer term holders have still seen strong gains, suggesting recent momentum has cooled after a powerful multi year run.

If you are assessing how this kind of earnings update can reset expectations across related companies, it could be a good moment to scan 36 power grid technology and infrastructure stocks

So after a solid quarter, higher guidance, buybacks and a dividend bump, Atmus Filtration Technologies has still given back some ground. Is most of the stock’s run already behind it, or does valuation suggest more room to work with?

Most Popular Narrative: 25% Undervalued

Based on the most followed narrative, Atmus Filtration Technologies’ fair value sits at $66.40 compared with a last close of $49.79. This frames the recent pullback very differently.

The company's push into industrial filtration (beyond automotive), both through disciplined M&A and organic new product launches, taps into the growing replacement and modernization needs of automated and digitized industrial environments, expanding the total addressable market and supporting both revenue growth and margin diversification.

Read the complete narrative. Read the complete narrative.

Want to see what is built into that $66.40 figure. The fair value rests on steady revenue expansion, rising margins and a richer earnings multiple than today. Curious which long range earnings and revenue paths have to hold for that gap to close. The full narrative lays out those assumptions in plain numbers.

Result: Fair Value of $66.40 (UNDERVALUED)

However, Atmus Filtration Technologies still faces real pressure if aftermarket demand softens, or if its heavy reliance on Cummins leads to any meaningful loss of volumes.

Another View on Atmus Filtration Technologies

The analyst narrative points to Atmus Filtration Technologies trading below a fair value of $66.40, using earnings forecasts and a future P/E of 23.3x. A second lens tells a different story. The SWS DCF model places fair value closer to $27.30, which implies the current $49.79 price sits well above that estimate. Which framework do you lean on when both are built from reasonable but very different assumptions?

For a closer look at how this cash flow based view is built, and how sensitive it is to changes in growth or discount rates, it can help to walk through the full SWS DCF model step by step. Look into how the SWS DCF model arrives at its fair value.

Simply Wall St performs a discounted cash flow (DCF) on every stock in the world every day (check out Atmus Filtration Technologies for example). We show the entire calculation in full. You can track the result in your watchlist or portfolio and be alerted when this changes, or use our stock screener to discover 51 high quality undervalued stocks. If you save a screener we even alert you when new companies match - so you never miss a potential opportunity.

Next Steps

With such a mixed set of signals around Atmus Filtration Technologies, it makes sense to move quickly and check the underlying data for yourself. To balance the concerns against the potential upside, review the 5 key rewards and 2 important warning signs.

Looking for more ideas beyond Atmus Filtration Technologies?

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.