Avantor surged 15.4% on July 29, closing at $14.37. That’s a big one-day move for a company whose profit engine recently faltered.
The short story: sales have slipped from the mid-7 billions into 6.6B in 2025, and margins went from positive to negative in one year. That combination — lower revenue and a swung operating margin — increases the business's apparent risk even as the market bids the stock higher.
To be concrete: revenue, over the arc the company reports, moved from 7.5B in 2022 to 7.0B in 2023, 6.8B in 2024, and 6.6B in 2025. Operating margin dropped to -3.8% in 2025 after being +16.0% the year before; net margin fell to -8.1% in the latest year. Those are meaningful changes.
Yet the valuation picture sends a mixed signal. The market values the company at a market cap of 9.8B and an enterprise value of 13.3B with net debt of 3.6B. EV/sales sits at 2.0x, which is below peer multiples.
Management attributes the profit decline to a mix of business and cost pressures. Here’s how they put it in the filing:
> "Net income for the six months ended June 30, 2026 decreased primarily due to lower operating income, as previously discussed, and higher income tax expense, partially offset by the absence of pension termination charges incurred in the prior year and lower interest expense resulting from debt repayments made over the last twelve months." (Avantor / 10-Q 2026-07-29)
That sentence does a lot of lifting: yes, operating income fell; yes, taxes rose; and yes, interest expense softened thanks to debt paydowns. The filing is flagging both the core earnings hit and one-off offsets.
The firm also points at cost and mix pressures for the decline in results:
> "The decrease was primarily driven by unfavorable product mix and inflationary pressures on SG&A expenses." (Avantor / 10-Q 2026-07-29)
In plain terms: customers bought a different mix of products and selling/administrative costs rose, squeezing margins.
Put those threads together and you get the core tension: the stock is cheap on sales, but the business has shown recent top-line declines and a dramatic margin reversal. That creates a wide range of outcomes depending on what multiple the market assigns later — the company’s own scenario table shows a big gap between a best-case and worst-case driven largely by the exit price/sales multiple.
There are some mechanics under the hood worth noting. The filing mentions debt repayments that trimmed interest expense, and the company says it found no goodwill impairment in a recent reorganization. But it also warns that valuing the business requires many assumptions about future profitability, cash flows, and margins — the same assumptions that matter most when past margins have swung tens of percentage points.
So the market is choosing one story — a cheap multiple and hope for a margin rebound — while the filing reads like a checklist of the things that could keep margins low: product mix, inflationary SG&A, and macro pressure. Both statements are in the filing; they just point in different directions.
*Figures and quotes from Avantor 10-Q (2026-07-29) and company annual filings; revenues and balance sheet items per the company.*