NEU Specialty Chemicals · Specialty chemicals · Defense materials · Cash generator · Thesis updated July 19, 2026

A cash cow with a shrinking core

Petroleum Additives is still the main engine, with $609.8 million of Q1 2026 sales.
That core segment had a 6.9% shipment volume decline in Q1 2026.
Margins held up in the core, with operating margin at 22.1% versus 22.0% a year earlier.
Specialty Materials gives NewMarket exposure to space and defense, but Q1 2026 operating profit fell to $12.4 million from $23.2 million.
The next test is whether late-Q1 shipment improvement carries into Q2 and whether AMPAC margins recover.

01 Running thesis

Strong cash flow, harder questions

NewMarket is a good business facing a real test. Its old engine, Petroleum Additives, still earns strong margins. In Q1 2026, that segment posted a 22.1% operating margin, almost flat with 22.0% a year earlier.

The concern is volume. Petroleum Additives shipments fell 6.9% in Q1 2026. Management says part of the pressure comes from walking away from low-margin business, and it also said shipments improved late in the quarter. That is the key bull case: the company may be pruning weak sales while keeping the best profits.

The bear case is simpler. If the 6.9% drop is market softness or share loss, the main profit pool may be shrinking faster than expected. Specialty Materials was supposed to help offset that pressure, but its Q1 2026 operating profit fell to $12.4 million from $23.2 million because of product mix.

The stock needs two things to go right. Core additive volumes need to stop falling. AMPAC needs to prove that Q1 was a lumpy quarter, not a lower-margin future.

Apr 2026→Management said shipments improved late in Q1, which slightly softened the concern around the 6.9% Petroleum Additives volume drop. The signal needs confirmation in Q2.

Apr 2026▼The Q1 2026 10-Q showed weaker core volumes and a sharp Specialty Materials profit drop. Petroleum Additives shipments fell 6.9%, while Specialty Materials operating profit fell to $12.4 million from $23.2 million.

Feb 2026→The 2025 10-K confirmed the split thesis. Petroleum Additives volumes fell 4.9% for the year, but NewMarket also planned up to $100 million to expand AMPAC capacity by more than 50%.

Oct 2025▼Q3 2025 increased worry about both engines. Petroleum Additives volume fell 4.1% in the quarter, and Specialty Materials margin dropped sharply because of shipment timing.

Jul 2025→Q2 2025 showed Specialty Materials could be profitable, with a 25% operating margin. The core Petroleum Additives segment still had a 2.5% volume decline.

Apr 2025▲Q1 2025 gave the first clear sign of high AMPAC earnings power, with Specialty Materials operating profit of $23.2 million. NewMarket also announced a major AMPAC capacity investment.

Feb 2025▲The 2024 10-K showed Petroleum Additives margin expansion and confirmed AMPAC was profitable after acquisition-related inventory pressure faded. That improved confidence in the new segment.

Oct 2024▲Q3 2024 showed the first profitable quarter for Specialty Materials after the AMPAC acquisition. The core additives business also kept strong profitability despite a small sales decline.

02 Business model

Additives fund the rocket bet

NewMarket sells chemicals that help fuels and lubricants perform better. Customers include global, national, and independent oil companies. This is the Petroleum Additives segment, and it is the company’s main source of sales and profit.

The business works when NewMarket keeps long customer ties, sells technical products, and manages raw material costs. It breaks when customers buy less, competitors take share, or raw material swings squeeze margins before pricing catches up.

In January 2024, NewMarket added Specialty Materials through the AMPAC acquisition. AMPAC makes critical materials used mainly in solid rocket motors for space launch and military defense. Calca, acquired in October 2025, added Ultra Pure and high-purity hydrazine propellants.

This gives NewMarket a second growth path tied to defense and space demand. But the segment can be lumpy because shipment timing and product mix can change reported profit sharply from quarter to quarter.

03 Product portfolio

What NewMarket sells

Cash cow

Lubricant Additives

These additives improve engine oils and industrial lubricants. They are part of the core Petroleum Additives segment.

Steady

Fuel Additives

These products improve fuel performance. In Q1 2026, fuel additive shipments rose modestly, partly offsetting lower lubricant additive shipments.

Growth engine

AMPAC specialty materials

AMPAC makes critical materials used mainly in solid rocket motors. NewMarket plans to expand ammonium perchlorate capacity by more than 50% by the end of 2026.

Option

High-purity hydrazine

Calca added Ultra Pure and high-purity hydrazine to the Specialty Materials segment. These are mission-critical propellants for aerospace and defense uses.

04 Business segments

Q1 mix is still additives-heavy

Petroleum Additives91%declining

Specialty Materials9%modest

Segment mix uses Q1 2026 reported net sales: $609.8 million for Petroleum Additives and $58.1 million for Specialty Materials. Specialty Materials includes Calca in Q1 2026, so year-over-year comparisons are not clean.

05 Risk factors

What could go wrong

Core additive volume keeps falling

High impact · Medium odds

Petroleum Additives is still the main earnings driver. Q1 2026 shipments fell 6.9%, worse than the full-year 2025 decline of 4.9%. If that reflects market weakness or lost share, not planned pruning, profits could keep sliding.

We watchPetroleum Additives shipment volume in Q2 and Q3 2026, especially whether the late-Q1 improvement continues.

AMPAC margins stay unpredictable

Medium impact · High odds

Specialty Materials profit fell to $12.4 million in Q1 2026 from $23.2 million a year earlier. Management blamed product shipment mix at AMPAC. If mix stays unfavorable, the segment may not offset pressure in additives.

We watchSpecialty Materials operating profit and operating margin in each 2026 quarter.

Defense and space funding shifts

Medium impact · Medium odds

A large part of Specialty Materials revenue comes from U.S. government contractors and subcontractors. These programs depend on government priorities and annual appropriations. Contracts can also face early termination for convenience.

We watchDefense budget decisions, contractor demand, and any disclosed contract delays or cancellations.

AMPAC expansion misses plan

Medium impact · Medium odds

NewMarket plans to invest up to $100 million to expand AMPAC ammonium perchlorate capacity by more than 50%. That project supports the Specialty Materials growth case. Delays, cost overruns, or weaker demand would reduce the payoff.

We watchCompany updates on whether the capacity expansion remains on track and on budget for completion by year-end 2026.

Raw material costs turn against margins

Medium impact · Medium odds

In Q1 2026, lower raw material costs helped offset lower Petroleum Additives shipments and higher operating costs. If raw materials rise while volumes stay weak, the stable 22.1% operating margin could come under pressure.

We watchPetroleum Additives gross profit, operating margin, and management comments on raw material pricing.

06 Quick answers

In one breath

What does NewMarket Corporation do?

NewMarket makes petroleum additives used in fuels and lubricants. It also owns AMPAC and Calca, which make specialty materials and propellants used in space and defense applications.

Why are investors worried about NewMarket?

The main worry is that Petroleum Additives shipments fell 6.9% in Q1 2026. Investors need to know whether that was planned pruning of weak business or a sign that the core market is shrinking.

What is the bull case for NEU?

The bull case is that NewMarket keeps strong additive margins while cutting low-profit sales. At the same time, AMPAC grows as demand for solid rocket motor materials rises.

What should investors watch next?

Watch Q2 Petroleum Additives shipment volume and Specialty Materials operating margin. Also watch whether the AMPAC capacity expansion stays on track for completion by year-end 2026.