ATI Inc. (ATI) | The Buildout — AI Infrastructure
The Verdict
ATI produces specialty materials and components, differentiated by materials science and process technology. Its largest end markets are aerospace and defense, led by products for jet engines and airframes plus a widening range of defense applications. The company's connection to AI infrastructure is indirect and narrow: land-based industrial gas turbines, whose demand is partly driven by data centers, use ATI's high-performance nickel alloys for hot sections. The rest of the record ties ATI to jet engines, naval nuclear, missiles and critical-materials scarcity rather than to artificial intelligence.
| Market Cap | — |
| Revenue (TTM) | $4.7B |
| Revenue Growth | +4.6% |
| EBITDA Margin (TTM) | 20.0% |
| Net Debt | $1.4B |
| Earnings Beats | 6 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Backlog set a record $4.4B at Q2 2026, up 18% year over year, with about 70% expected to convert into revenue within 12 months.
- Management raised full-year 2026 guidance twice in three months — the adjusted EBITDA midpoint moved from $1.000B to $1.035B to $1.160B — and initiated Q3 guidance at a midpoint implying +38% year-over-year.
- The AA&S segment printed an all-time-high 23.7% margin in Q2, up 930 basis points year over year; excluding a $10M asset-sale gain, underlying margin was about 22% versus 14% a year earlier.
- The naval nuclear renewal is worth about $1B over five years, more than doubling annual revenue on that program, and took effect in Q2 2026, running through 2030.
- Lead times are extending — about 12 months on nickel alloys, 20 months on premium-quality titanium and above 24 months on isothermal forgings — which management reads as demand exceeding qualified capacity.
What We’re Watching
- HPMC grew 5% year over year in Q2 versus 11% consolidated — its second straight quarter trailing AA&S — after qualification timing at the Chihuahua, Mexico facility and the EB2 titanium furnace pushed $30M–$40M of revenue at 40%–50% margins from the first half into the second.
- Full-year guidance is heavily Q4-weighted: Q4 implies about $335M of EBITDA and a roughly $1.350B annualized exit rate, and second-half free cash flow is implied at $430M against $143M in the first half.
- Airframe revenue declined in both Q1 and Q2, yet the full-year guide requires mid- to high-single-digit growth entirely in the second half.
- Specialty Energy fell 6% in Q2 as capacity was redirected to naval nuclear defense; the mid-teens full-year guide needs a second-half rebalance, and the data-center framing management used in Q1 was dropped in Q2.
The aerospace-and-defense thesis looks strengthening on the disclosed evidence — a record backlog, two guidance raises in three months, a step-change in AA&S margins and a naval nuclear contract that more than doubles annual revenue on that program. But the load-bearing claims are forward: conversion of the deferred HPMC revenue, the airframe ramp and the durability of AA&S margins. Management's own words — "We have committed contracts in place. This is not speculative." — identify the second-half build as the burden of proof. The open question is whether the AA&S margin is structural, as management asserts, or partly market-driven, given it includes a $10M asset-sale gain and reflects defense, nuclear and hafnium-zirconium tightness that no filing certifies as permanent.
Earnings Beat
ATI reported Q2 2026 revenue of $1.26B, up 11% year over year on a 13% increase in aerospace and defense. Gross margin was 24.6%. Adjusted EBITDA, management's measure, rose 37% to $284M at a 22.6% margin, up 440 basis points, and net income attributable to ATI was $151M, up 50%. Adjusted EPS was $1.23 versus $0.74 a year earlier, and adjusted net income was $170M, up 60%.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $1.3B | $1.2B | $1.1B | +10.6% |
| Gross margin | 24.6% | 22.8% | 21.4% | +320bps |
| EBITDA | $309M | $216M | $202M | +52.6% |
| EPS | $1.11 | $0.85 | $0.70 | +57.8% |
| Backlog | $4.4B | $4.1B | n/a | +18% y/y |
| Adjusted EBITDA margin | 22.6% | 20.1% | 18.2% | +24.2% |
What was once viewed as a more cyclical, lower-margin business has become a second durable earnings engine for ATI… That's not simply the result of stronger markets. It's the result of better mix, better pricing and better execution.— Kimberly A. Fields, CEO, 2026-08-06
Management tone: The Q2 2026 call was confident and broad-based, an escalation from April. Management reclassified the AA&S segment from cyclical to structural, raised full-year guidance by $125M at the midpoint, and attributed the raise to contracted pricing, committed orders, structural segment improvement and HPMC timing rather than market strength alone. On the second-half ramp the tone turned faintly defensive: CFO Rob Foster said, "We have committed contracts in place. This is not speculative." Management was direct on the free-cash-flow bridge and quantified the HPMC deferral at $30M–$40M, but declined formal 2027 guidance and did not isolate the naval nuclear contract's margin impact.
Management Guidance
For full-year 2026, management guides adjusted EBITDA of $1.135B–$1.185B (midpoint $1.160B, about 35% year-over-year growth), adjusted EPS of $4.90–$5.18 and adjusted free cash flow of $550M–$600M, implying $430M in the second half. Q3 2026 guidance is adjusted EBITDA of $305M–$315M and adjusted EPS of $1.31–$1.37. Consolidated incremental margins are guided to about 50%, up from about 40%. Gross capital expenditure is held at $280M–$300M, with $55M–$65M customer-funded. Segment margins: HPMC mid-20s, AA&S low-20s. End markets: jet engines high teens, defense high teens, airframe mid- to high-single-digit, specialty energy mid-teens. Management pointed to the Q4 2026 timeframe for formal 2027 guidance.
Trajectory
Revenue is accelerating on the audited data: $1,140M in Q2 FY2025, $1,152M in Q1 FY2026 and $1,261M in Q2 FY2026, an 11% year-over-year increase. Gross margin has moved from 21.4% a year ago to 22.8% in Q1 and 24.6% in Q2, while operating and EBITDA margins are broadly stable. Reported EBITDA rose to $309M in Q2 from $216M in Q1 and $203M a year earlier. The drivers in the source are the aerospace-and-defense mix, contractual pricing, the Elevation throughput program and a richer AA&S mix.
The Model
The model projects FY+1 revenue of $5,052.5M and EBITDA of $1,162M, a 23.0% margin. For FY+2 it projects revenue of $5,650M and EBITDA of $1,412M, a 25.0% margin. The near term sits close to the run rate implied by management's guided second half, while FY+2 assumes the capacity pipeline converts — nickel capacity up 15%–20% by early 2028 targeting about $350M of incremental annual revenue — with margin expanding toward 25%.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $4.6B | $5.1B | $5.7B |
| YoY Growth | — | +10.1% | +11.8% |
| EBITDA | $814M | $1.2B | $1.4B |
| EBITDA Margin | 17.7% | 23.0% | 25.0% |
Projections are the median of 5 independent model runs. The model’s revenue sits 3.7% above analyst consensus.
For full-year 2026, management guides adjusted EBITDA of $1.135B–$1.185B (midpoint $1.160B, about 35% year-over-year growth), adjusted EPS of $4.90–$5.18 and adjusted free cash flow of $550M–$600M, implying $430M in the second half. Q3 2026 guidance is adjusted EBITDA of $305M–$315M and adjusted EPS of $1.31–$1.37. Consolidated incremental margins are guided to about 50%, up from about 40%. Gross capital expenditure is held at $280M–$300M, with $55M–$65M customer-funded. Segment margins: HPMC mid-20s, AA&S low-20s. End markets: jet engines high teens, defense high teens, airframe mid- to high-single-digit, specialty energy mid-teens. Management pointed to the Q4 2026 timeframe for formal 2027 guidance.
What Could Go Right — and Wrong
- The second-half ramp arrives as guided, with Q4 at roughly $335M of adjusted EBITDA, turning the exit-rate framing into a base.
- The $30M–$40M of HPMC revenue deferred from the first half converts in the second half, confirming the issue was qualification timing rather than demand.
- Airframe revenue turns positive in the second half, validating the mid- to high-single-digit full-year view.
- AA&S margins hold at or above the low-20s into 2027 without one-time gains, supporting the claim that it is a second durable earnings engine.
- Nickel capacity additions — VIM online by end-2027, up 15%–20% by early 2028 — land into demand that is still running ahead of supply.
- A second-half slip — another qualification delay, an airframe push to the right, or a late-Q4 shipment landing in January — hits both the EBITDA guide and the free-cash-flow bridge, which share the same timing levers.
- AA&S margins mean-revert toward the high teens if defense, nuclear and hafnium-zirconium pricing normalize, moving the consolidated margin floor back down.
- ATI's own nickel capacity additions — up 15%–20% by early 2028 — arrive into a market where management says demand continues to exceed qualified capacity; if demand normalizes as that capacity lands, the tightness supporting current pricing could loosen.
- Airframe declines for a third consecutive quarter, putting the full-year mid- to high-single-digit guide out of reach.
- Input and energy costs rise ahead of contractual pass-throughs; the 10-Q added a new Iran/Israel conflict risk factor, and helium, argon and graphite electrodes are flagged as inflation-exposed.
Looking Ahead
The next 12 months turn on whether ATI's second-half build converts: HPMC's deferred revenue, the airframe ramp and Specialty Energy's rebalance all have to show up. The capacity pipeline is delimited — nickel remelt during 2026, a new VIM furnace online by end-2027, and 15%–20% more nickel capacity by early 2028 — with the Chihuahua, Mexico facility and the EB2 titanium furnace still in qualification. Management has pointed to the Q4 2026 timeframe for formal 2027 guidance and an Investor Day later in 2026, where multiyear strategy and capacity sequencing are expected. Free-cash-flow conversion toward a long-term goal of more than 90% remains to be proven.
- Q3 2026Q3 2026 results — Tests the Q3 adjusted EBITDA guide, which implies +38% y/y and +9% sequentially, plus HPMC sequential build.
- H2 2026Airframe, Specialty Energy ramp — Both must turn positive to reach full-year guides.
- Q4 20262027 guidance update — Management pointed to the Q4 timeframe for 2027 guidance.
- Later in 2026Investor Day — Expected venue for multiyear strategy and capacity framing.
- End-2027New VIM furnace online — Nickel remelt expansion; capacity adds follow by early 2028.
- Early 2028Nickel capacity +15%–20% — Targets about $350M of incremental annual revenue by 2028.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $4.4B | $4.6B | $4.7B | +5.2% |
| Gross Margin | 21.0% | 22.0% | 23.4% | +100bps |
| EBITDA | $735M | $814M | $943M | +10.7% |
| EBITDA Margin | 16.8% | 17.7% | 20.0% | +89bps |
| Net Income | $368M | $404M | $476M | +9.9% |
| Free Cash Flow | −$124M | $480M | $526M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)23.4%
- EBITDA Margin (TTM)20.0%
- Net Margin (TTM)10.1%
- ROIC17.4%
- FCF Conversion55.8%
- SBC / Revenue0.6%
The Company
ATI produces specialty materials and components, differentiated by materials science expertise and advanced process technologies. Its products include nickel-based alloys and superalloys, titanium and titanium-based alloys, advanced metallic powder alloys, precision forgings, machined parts and 3D-printed aerospace products. Aerospace and defense are its largest end markets — about 68% of total sales in the 10-K, 69% of Q1 2026 sales, and guided to more than 70% for full-year 2026 — led by jet engines and airframes plus a widening range of defense applications. Management describes ATI as a producer of 6 of the 7 most advanced nickel-based superalloys, including 5 where it is the sole source supplier, and as 1 of 3 qualified producers in the Western world of high-purity hafnium and zirconium; those claims appear on earnings calls, and the 10-K's own sole-source disclosure field is empty.
ATI operates as an integrated melting, forging and finishing business. It runs melting in Monroe and Bakers NC and Richland WA, long-product production in the Carolinas, South Carolina and Pennsylvania, forgings and machined components in Wisconsin and California, zirconium, hafnium and niobium operations in Oregon and Alabama, and flat-rolled melting, hot-rolling and finishing across Pennsylvania and South Carolina. It owns forging and machining operations in Stalowa Wola, Poland, and holds 60% of a finishing joint venture (STAL) in Shanghai. Capital spending is held at $280M–$300M gross for 2026, with $55M–$65M customer-funded.
Business Segments
Competitive Landscape
The 10-K describes ATI's competitive position by end market. In HPMC it names Berkshire Hathaway's Precision Castparts for nickel-based alloys and superalloys, specialty steel alloys, titanium and precision forgings; Howmet Aerospace for titanium and titanium-based alloys; Carpenter Technology for legacy nickel-based alloys and superalloys and specialty steel; and Aubert & Duval for precision forgings. In AA&S it names Haynes International and VDM Metals GmbH, a subsidiary of Acerinox. Beyond the filings, management describes a constrained market with qualified-capacity scarcity — lead times of about 12 months on nickel alloys, 20 months on premium titanium and above 24 months on isothermal forgings — and says price increases are contractual rather than tied to spot scarcity.
- Berkshire Hathaway (Precision Castparts)10-K names it as an HPMC competitor for nickel-based alloys and superalloys, specialty steel alloys, titanium and titanium-based alloys, and precision forgings.
- Howmet Aerospace10-K names it as a competitor for titanium and titanium-based alloys.
- Carpenter Technology10-K names it as a competitor for legacy nickel-based alloys and superalloys and specialty steel alloys.
- Aubert & Duval10-K names it as a competitor for precision forgings.
- Haynes International and VDM Metals GmbH (Acerinox S.A.)10-K names both as AA&S competitors.
Supply Chain
ATI sits between raw-material suppliers and aerospace, defense and nuclear OEMs. It melts, forges and finishes specialty alloys, relying on critical inputs — nickel, graphite electrodes, helium and argon — from a limited number of suppliers, then sells finished materials and components to airframers, engine makers and nuclear programs.
More on ATI: Earnings recap