Cummins Inc. -- How the Business Works
Cummins is the global leader in diesel and natural gas engines for commercial vehicles, and
one of only two companies (with Caterpillar) positioned to capture the massive data center
backup power buildout. The company holds oligopoly or dominant positions across medium-duty
diesel engines (~50-60% NA market share), heavy-duty diesel engines (~27% NA share), natural
gas engines (near-monopoly via the X15N in Class 8), and large-scale generator sets for data
centers (duopoly with CAT). FY2025 total revenue reached ~$40.6B, with combined power
generation revenue of ~$9.7B growing 21%+ YoY driven by data center demand. Management
described CMI as a "low-risk weighted play on the AI boom" with ~$3.5B in data-center-related
revenue growing 30-35% YoY. The business spans five segments: Engine (~35% of revenue),
Distribution (~30%), Components (~20%), Power Systems (~10%), and Accelera/New Power (~5%).
Cummins operates in deeply cyclical end markets -- HD and MD engine revenue both declined
double digits in 2025 -- but the secular data center and natural gas engine tailwinds provide
a powerful structural offset.
Total Revenue (FY2025)
~$40.6B
Power gen +21% YoY | Engine -7% YoY
Market Cap / Trailing P/E
$75.95B / 26.8x
$549.68 | EPS TTM $20.50 | Yield 1.5%
Data Center Revenue (2025)
~$3.5B
Growing 30-35% YoY | duopoly with CAT
Thematic Score
8 / 10
Oligopoly + data center + nat gas themes
How Cummins makes money -- multi-segment industrial platform with secular power generation tailwind
The Cummins Business Model
Engine Segment
~35% of rev | HD, MD, off-highway engines
→
Power Systems
~$7.5B | data center gensets + industrial
→
Distribution
~30% of rev | parts, service, power gen
→
Accelera (New Power)
~5% of rev | electrified + hydrogen
Multi-market oligopoly -- dominant positions across engines and power generation:
Cummins holds ~50-60% of the NA medium-duty diesel engine market, making it universally the top
engine brand across the 10 largest U.S. states by registered commercial vehicles. In heavy-duty,
CMI commands ~27% share, well ahead of PACCAR and Volvo captive programs. In data center backup
power, Cummins and Caterpillar form a duopoly in large-scale generator sets -- combined power
generation revenue reached ~$9.7B in 2025 growing 21%+. In natural gas engines, the X15N gives
CMI a near-monopoly in Class 8 as the only high-horsepower near-zero-emissions alternative to
diesel. Barriers to entry include decades of OEM integration, emissions certification complexity,
global service networks, and the capital intensity of engine development programs.
Segment and operating data from Cummins earnings reports via Daloopa (company_id: 344).
Segment revenue -- power generation surging as truck engines cycle down
Annual Segment Revenue (USD Millions, FY2024 vs FY2025)
| Segment | 2024 ($M) | 2025 ($M) | YoY |
|---|---|---|---|
| Engine - Heavy-Duty | $4,244 | $3,489 | -17.8% |
| Engine - Medium-Duty | $4,166 | $3,613 | -13.3% |
| Engine - Light-Duty / RV | $1,595 | $1,930 | +21.0% |
| Engine - Off-Highway | $1,707 | $1,843 | +8.0% |
| Engine Total | $11,712 | $10,875 | -7.2% |
| Distribution - Power Gen | $3,972 | $4,932 | +24.2% |
| Distribution - Parts / Filtration | $3,980 | $4,083 | +2.6% |
| Power Systems - Power Gen | $3,985 | $4,731 | +18.7% |
| Power Systems - Industrial | $1,932 | $2,063 | +6.8% |
| Power Systems Total | $6,408 | $7,463 | +16.5% |
Financial data from Cummins earnings reports via Daloopa (company_id: 344).
Competitive position -- oligopoly across engines and power generation
| Market | CMI Share | Key Competitors | Competitive Dynamics |
|---|---|---|---|
| Medium-Duty Diesel (NA) | ~50-60% | PACCAR, Navistar/MAN | Dominant | #1 in all top 10 U.S. states by fleet size |
| Heavy-Duty Diesel (NA) | ~27% | PACCAR (captive), Volvo (captive) | Top 3 | independent supplier advantage with Daimler expanding CMI portfolio |
| Natural Gas Engines (Class 8) | Near-monopoly | None meaningful | X15N is only high-HP near-zero-emissions Class 8 alternative |
| Data Center Backup Power | Duopoly | Caterpillar | Two-player market | ~$3.5B CMI data center revenue in 2025 |
| Electrolyzers (Western) | Leader | Nel, ITM Power, Plug Power | ~300 MW committed orders | early-stage, loss-making |
Market share estimates from TPS analysis, company earnings calls, and industry research.
Thematic tailwinds -- data center power is the primary secular driver
Key Thematic Drivers for Cummins
Data Center Power Gen
Very Strong
~$3.5B revenue | +30-35% YoY
DC demand: 5% to 12% of U.S. power by 2028
Natural Gas Transition
Strong
X15N monopoly in Class 8
Targeting 8-10% Class 8 share by 2026
EPA 2027 Regulations
Moderate
New X10 engine: 75% less NOx than required
Daimler expanding CMI engine portfolio for 2027
Hydrogen / Accelera
Speculative
~300 MW PEM electrolyzer orders
$458M restructuring charge in Q4 2025
Data center power is the defining secular theme: Global data center generator
market is expected to grow from $9.5B (2025) to $17.0B (2035). Cummins and Caterpillar are the
only two credible suppliers at scale. Power Systems hit record 22.7% EBITDA margins in 2025,
driven by data center backup power demand. Combined power generation revenue across Power Systems
and Distribution segments grew +21.4% YoY to ~$9.7B, representing ~24% of total company revenue.
Management described the opportunity as requiring only "modest incremental internal investment
for which there is high and growing visibility for demand."
Thematic data from Cummins Q4 2025 earnings call, company filings, and industry research.
Data center power -- the AI infrastructure play within an industrial company
DC Revenue (2025)
~$3.5B
Growing 30-35% YoY
Power Gen Revenue (Combined)
~$9.7B
+21.4% YoY | ~24% of total revenue
Power Systems EBITDA Margin
22.7%
Record level in 2025
DC GenSet TAM (2035E)
$17.0B
From $9.5B in 2025 | ~6% CAGR
Risks and catalysts -- what to monitor
Catalysts
Data center power acceleration -- $3.5B in DC revenue growing 30-35% YoY with duopoly pricing power; secular multi-year buildout with high demand visibility
Natural gas engine adoption -- X15N near-monopoly in Class 8; targeting 8-10% market share by 2026; RNG demand growing as fleets seek emissions reduction
EPA 2027 product cycle -- new X10 diesel engine (75% less NOx than required) and B6.7 Octane gasoline engine create multi-year upgrade cycle; Daimler expanding CMI engine portfolio
Power Systems margin expansion -- record 22.7% EBITDA margins driven by favorable data center mix; further upside as DC share of revenue grows
India growth -- deep partnerships (Tata, KPIT JV) and local manufacturing presence in a growing market for both on-highway and power generation
Key Risks
Cyclical truck market downturn -- HD engine revenue -17.8% and MD -13.3% YoY in 2025; total engine unit shipments fell from 632,600 to 554,200; core on-highway business (~35% of revenue) remains cyclically exposed
Accelera/hydrogen losses -- $458M restructuring charge in Q4 2025; electrolyzer demand described as a "sharp and dramatic" decline; no clear path to near-term profitability
Tariff and trade policy exposure -- India tariffs impacted Q4 2025 Power Systems margins; broader trade uncertainty creates headwinds for international operations
Cyclical dilution of thematic thesis -- unlike a pure-play data center company, CMI earnings are diluted by cyclical truck weakness which partially offsets the secular power gen tailwind
Valuation at 26.8x trailing P/E -- stock is up ~111% from its 52-week low; much of the data center thesis may be priced in at current levels
Risk and catalyst data from Cummins Q4 2025 earnings call, company filings, and industry research.