Snapshot

The five largest U.S. defense prime contractors -- Lockheed Martin (LMT), RTX Corporation (RTX), Northrop Grumman (NOC), General Dynamics (GD), and Boeing (BA) -- collectively hold $756B in backlog across all segments as of Q1 2026 (LMT $186B, RTX $271B, NOC $96B, GD $131B, BA $695B total / $86B defense). None reports AI-specific revenue or backlog as a separate line item. The Pentagon's FY2026 budget requests $13.4B for AI and autonomy, of which $9.4B is unmanned aerial vehicles. Major AI-adjacent programs flowing to the primes include the $151B SHIELD/Golden Dome missile defense ceiling, the CCA drone wingman program (~$2.37B requested for FY2027), and JADC2 command-and-control ($298M FY2026). These programs require AI for autonomous flight, real-time target discrimination, and sensor fusion, but the AI content is embedded in larger platform contracts rather than purchased separately.

The $13.4B/year Pentagon AI and autonomy budget flows into platform contracts (fighters, missiles, drones, satellites) where AI is a subsystem, not a standalone purchase. The primes capture this spending as part of $300B+ in annual defense revenue across the Big 5, but neither they nor DoD break out the AI portion. The $151B SHIELD ceiling and $3.2B in space interceptor awards are contracted, but individual prime shares remain undisclosed at the task-order level.

The product & how money is made

Defense primes sell platforms (aircraft, missiles, ships, satellites, ground vehicles) and services (maintenance, upgrades, IT, logistics) to the U.S. government and allied militaries. AI enters these platforms in several forms:

• Autonomous flight software -- CCA drone wingmen, MQ-25 refueling drone (Boeing), MQ-28 Ghost Bat (Boeing). The AI enables the drone to fly, navigate, and execute missions without a pilot. The government pays for the whole aircraft; the AI is bundled in.
• Sensor fusion and target discrimination -- Golden Dome interceptors need AI to identify and track hypersonic threats at machine speed. IBCS (Northrop Grumman) connects every sensor to every shooter using AI-driven battle management. These are software layers inside multi-billion-dollar hardware programs.
• Predictive maintenance and digital twins -- AI models that predict engine failures (Pratt & Whitney/RTX), structural fatigue (LMT F-35), and supply chain needs. Paid through long-term service contracts.
• Government IT and cloud -- General Dynamics' GDIT ($13.5B revenue, FY2025) runs federal agency networks and is deploying AI/cloud solutions (Google Cloud partnership for IL6 secret-level "cloud-in-a-box"). Revenue comes from IDIQ service contracts.

Money arrives through cost-plus contracts (government reimburses costs plus a negotiated fee, typical margins 8-10%), fixed-price contracts (contractor bears cost risk, higher margins if execution is clean, losses if not -- Boeing BDS lost $128M operating in FY2025 on fixed-price overruns), and time-and-materials contracts (common for IT services). Backlog converts to revenue over years to decades: LMT expects 34% of its $186B backlog to convert within 12 months.

Sources: LMT Q1 2026 earnings release; GD FY2025 annual results; Boeing FY2025 Q4 results; GDIT-Google partnership press release (Nov 2025).

Demand

Contracted (appropriated money, signed agreements)

• SHIELD / Golden Dome: $151B contract ceiling over 10 years (through Dec 2035), issued by the Missile Defense Agency. 1,014 companies hold positions in the initial pool. LMT, RTX, NOC, and GD all received awards. $3.2B in OTA agreements for space-based interceptors awarded April 2026 to 11 companies including all four defense primes plus Anduril. Per-company values undisclosed. contracted
• CCA (Collaborative Combat Aircraft): FY2027 budget requests $2.37B total ($997M procurement, $1.37B R&D). Increment 1 led by General Atomics and Anduril (not the listed primes), but Northrop-Kratos won the Marine Corps CCA contract, and RTX/Raytheon provides autonomy software. Target: 100-150 Increment 1 aircraft at under $30M each. Nine vendors under contract for Increment 2 prototypes. contracted
• Munitions ramp: LMT signed framework agreements to increase PAC-3, THAAD, and PrSM production rates by 3-4x. LMT Missiles & Fire Control Q1 2026 revenue grew 8% YoY to $3.6B. RTX won a $3.7B GEM-T Patriot interceptor contract (April 2026). contracted
• JADC2: $298M requested for FY2026 under the Chief Digital and AI Officer. Cross-domain AI command system. contracted
• Navy autonomous: $5.3B across all Navy autonomy programs in FY2026, up $2.2B from FY2025. Includes procurement of 3 MQ-25 aircraft (Boeing). contracted
• Boeing-Palantir partnership (Sept 2025): AI integration across all Boeing defense production lines and classified programs. No dollar value disclosed. paper

Forecast (not yet contracted)

• Pentagon total AI/autonomy budget trajectory: $13.4B in FY2026, up from $1.3B at DIU alone in FY2025. Congressional appropriations required each year. est.
• CCA production at scale: "Hundreds to low thousands" of airframes across increments. At $30M per unit, 1,000 aircraft = $30B. Final production decision expected summer 2026. est.
• Golden Dome full buildout: The Union of Concerned Scientists estimates an effective space-based interceptor network could require "hundreds to several thousand" orbiting interceptors at ~$300B total. The current $151B ceiling may be a floor. est.
• NATO rearmament: European allies targeting 2%+ of GDP for defense spending. Drives international orders for missiles (RTX Patriot), fighter aircraft (LMT F-35), and command systems (NOC IBCS). 27% of Boeing's defense backlog is international. est.

Sources: MDA SHIELD contract (SAM.gov, Dec 2025); Space Force SBI OTA awards (The Register, Apr 2026); Military Times CCA FY27 budget (Apr 2026); Defense.info CCA update (Jan 2026); DefenseScoop FY26 autonomy budget (Jun 2025); LMT Q1 2026 earnings; RTX Q1 2026 earnings; HigherGov JADC2 budget data.

Supply

Who can deliver AI-integrated defense platforms

• Five primes hold sole-source positions on major platforms. LMT is sole-source for F-35 (1,200+ delivered, 3,000+ planned) and co-leads Golden Dome. RTX is sole-source for Patriot/SM-3/SM-6 interceptors. NOC is sole-source for B-21 bomber and IBCS. Boeing is sole-source for MQ-25. GD is sole-source for Columbia-class submarines ($15.4B contract, Apr 2026). Replacing an incumbent on these programs requires re-qualifying the entire platform.
• New entrants are taking CCA and smaller programs. General Atomics and Anduril won CCA Increment 1. Anduril ($1B+ defense revenue, growing ~100% YoY est.) and Shield AI ($500M+ est.) are capturing autonomous systems work, but lack production scale and classified facilities at prime-contractor levels.
• Workforce. GD employs 110,000+, RTX 180,000+. The five combined employ roughly 600,000+ est.. TS/SCI clearances take 12-18 months. Classified facilities (SCIFs) are expensive and scarce.
• Production capacity is expanding but slowly. LMT is investing to scale munitions production 3-4x. NOC is spending ~$2.5B in company-funded investment to boost B-21 production capacity by 25%. These expansions take years.

Key capacity constraint

The primes can license or partner for AI software (Boeing-Palantir, GDIT-Google). The bottleneck is platform production: building the aircraft, missiles, ships, and satellites that the AI runs on. LMT delivered only 32 F-35s in Q1 2026 (down from 47 in Q1 2025). Boeing's BDS runs at 3.1% operating margin. NOC took a $477M loss provision on B-21 low-rate production. Physical manufacturing, not software, constrains revenue growth.

Sources: LMT Q1 2026 earnings (F-35 deliveries); NOC Q1 2026 earnings (B-21 capex); GD Q1 2026 earnings (workforce); fed-spend.com defense contractor rankings.

The gap

Pricing direction: Defense contract pricing is set by negotiation with the government, not by market forces. Cost-plus contracts pass through costs with a fixed fee (margins ~8-10%). Fixed-price contracts lock in price at signing -- actual margins depend on execution. The trend is toward more fixed-price development (e.g., B-21, CCA), which shifts cost risk to contractors and has caused losses (Boeing BDS, NOC B-21). AI software is generally not priced separately from the platform it runs on; it is embedded in the system price.

The players

Comparison notes

• Defense purity: NOC (88% defense) and LMT (80%) are the most defense-focused. BA (38%) and RTX (45%) have large commercial aerospace businesses.
• Cash generation: RTX leads on FCF ($7.4B), followed by LMT ($6.9B). Boeing burned $1.9B in FY2025. GD's book-to-bill of 2.0x in Q1 2026 (defense segments: 2.2x) was the strongest of the group.
• AI as distinct business: Only GD has a segment (Technologies/GDIT, $13.5B) where AI and IT services are the primary offering. For LMT, RTX, NOC, and BA, AI is embedded in hardware platform contracts and cannot be isolated financially.
• Execution risk: Boeing BDS has posted operating losses or near-zero margins for three consecutive years on fixed-price program overruns. NOC took a $477M B-21 charge in Q1 2025 but recovered in Q1 2026 (Aeronautics margin back to 9.3%). LMT's segment operating margin compressed from 11.6% to 10.1% QoQ in Q1 2026.

Sources: LMT, RTX, NOC, GD, BA Q1 2026 and FY2025 earnings releases; fed-spend.com Top 25 defense contractors.

The price of exposure

Arithmetic

• LMT trades at 16x forward earnings on FY2026 guidance of $29.35-$30.25 EPS. Guided FCF of $6.5-6.8B implies 5.5-5.8% FCF yield at current market cap. The trailing P/E of 24.9x reflects a one-time Q1 2025 favorability that did not repeat.
• RTX at 23x forward is the highest-multiple prime. It also has the largest absolute FCF ($7.4B FY2025, guided $8.25-8.75B FY2026) and the highest revenue growth (10% organic). It carries $38.9B in debt and $53.3B in goodwill from the 2020 merger.
• NOC at 16.8x trailing is the lowest, but B-21 execution risk depresses this -- the Q1 2025 $477M charge temporarily reduced trailing earnings. Forward P/E of 17.8x reflects guided EPS of ~$27.40-$27.90. Company-funded capex of $2.5B to expand B-21 production will consume cash before driving incremental revenue.
• GD has the lowest debt ($9.8B) and strongest Q1 2026 book-to-bill (2.0x consolidated, 2.2x defense). The Technologies/GDIT segment provides the most direct AI/IT exposure among the primes, though at lower margins than defense hardware.
• BA is in turnaround. FY2025 FCF was negative $1.9B. Defense segment posted a $128M operating loss on $27.2B revenue. No dividend. P/E of 86x trailing reflects the recovery year.

Sources: yfinance live data (Jun 2, 2026); company FY2026 guidance from Q1 2026 earnings releases.

What to deep-dive next

• SHIELD task order flow: The $151B ceiling is a pool -- actual money flows through task orders not yet issued. Track SAM.gov for task order awards to determine which primes capture the largest share.
• CCA Increment 2 down-select: Nine vendors are under contract for prototypes. The Air Force plans further Increment 2 design awards in 2026. If any listed prime (LMT, NOC, Boeing) wins Increment 2, the program could become material to revenue by late decade.
• GDIT AI contract wins: GD's Technologies segment is the only prime segment where AI/IT is the primary product. Track whether GDIT's book-to-bill (0.92x in Q4 2025, 1.2x full year) improves as AI-specific task orders accelerate.
• B-21 production ramp: NOC's $2.5B company-funded investment to boost B-21 capacity 25% is the largest self-funded bet in the group. Track whether Aeronautics margins stabilize above 9% as production scales.
• Boeing BDS margin recovery: BDS ran 3.1% operating margin in Q1 2026, up from near-zero/negative. Track whether this continues improving.

Sources & confidence