Guided Missile & Space Vehicle Propulsion Unit and Parts Manufacturing (NAICS 336415)

A Histometrics industry primer for public-market and private investors

1. Overview

This industry builds the engines that push missiles and spacecraft: solid rocket motors (SRMs — sealed tubes of rubbery propellant that burn all at once), liquid rocket engines (which pump fuel and oxidizer into a combustion chamber), and the specialized parts that go into them — nozzles, turbopumps, igniters, thrust chambers, propellant grains. It is the propulsion layer that sits underneath finished missiles and launch vehicles.

Why an investor should care: propulsion is the single hardest bottleneck in the U.S. defense and space industrial base right now. You cannot fire a missile or launch a rocket without a motor, only a handful of firms can make them at scale, and demand — munitions replenishment, missile defense, and a record launch cadence — is rising faster than the plants can grow. That mismatch is where the money and the risk both live.

There is no clean, pure-play public stock for this exact code. Public-market investors reach it indirectly through large defense primes (L3Harris, Northrop Grumman), through launch companies that build their own engines (Rocket Lab, Firefly Aerospace), or through the one publicly traded upstream materials supplier (NewMarket/American Pacific). Private investors reach the most economically important producers — SpaceX, Blue Origin, and a wave of venture-backed motor startups — that are not listed at all. A large L3Harris solid-rocket-motor spin-off (Missile Solutions) is expected to give the public market a much purer entry point in 2026 [6][7].

2. What it is and how it's structured

Scope. NAICS (North American Industry Classification System) code 336415 covers establishments primarily making complete propulsion units — rocket engines and motors — for guided missiles and space vehicles, plus the parts for those units. That means both defense (missile boosters, interceptor motors, ICBM stages) and space (launch-vehicle first-stage engines, upper-stage engines, in-space thrusters). Covered systems include solid rocket motors, liquid rocket engines and thrusters, hybrid systems, and components such as nozzles, casings, combustion chambers, turbomachinery, valves, and propellant-management hardware [1].

What it excludes — this matters for reading the statistics:

• 336414 — Guided Missile and Space Vehicle Manufacturing: the finished missile or rocket. A company whose main product is the whole vehicle is classified here even if it builds its own engines in-house.
• 336419 — Other Guided Missile and Space Vehicle Parts: airframe and auxiliary parts that are not propulsion.
• 336412 — Aircraft Engine and Engine Parts: jet engines and turbofans for airplanes — a separate, much larger industry.
• 325920 — Explosives Manufacturing and chemical codes: the raw propellant chemicals (e.g., ammonium perchlorate) are made upstream, not here.

This distinction matters for interpreting statistics. NAICS classifies establishments (generally physical operating locations) rather than consolidated companies or product markets. A vertically integrated launch company's engine plant may be classified under 336415, but similar work inside a complete-vehicle establishment may fall under 336414. Consequently, neither "rocket market" forecasts nor defense-company segment revenue is a reliable measure of this NAICS industry.

Ownership mix. This is not a fragmented industry of small shops. It is dominated by (a) two big propulsion houses now owned by defense primes — Aerojet Rocketdyne (bought by L3Harris in 2023) and Orbital ATK's motor business (bought by Northrop Grumman in 2018) [4][10]; (b) captive engine shops inside vertically integrated launch companies (SpaceX, Blue Origin, Rocket Lab, Firefly) that build engines only for their own rockets; and (c) a young cohort of venture- and Pentagon-backed startups (Ursa Major, X-Bow Systems, Anduril) trying to break in [14][15]. The customer base is narrower still: the U.S. government (Department of Defense and NASA) is close to the entire buyer — a near-monopsony.

3. How big it is

Federal statistics for this exact code, from our ground-truth sources:

Two things stand out. First, extreme concentration: the top four firms account for 98.4% of receipts, and the market Herfindahl-Hirschman Index (a standard concentration measure) is suppressed by the Census — a tell that so few firms exist that publishing it would disclose individual companies [2]. Second, high pay per worker (~$131,000 implied) reflects a workforce heavy on aerospace and propulsion engineers.

The undercount caveat — and it cuts an unusual way. Federal business statistics here understate total national rocket-propulsion activity, because the highest-volume engine builders are classified elsewhere. SpaceX builds Merlin and Raptor engines, and Blue Origin builds BE-4 and BE-3 engines, in enormous numbers — but their primary product is launch vehicles and launch services, so their establishments fall under vehicle/launch codes (336414 and space-transportation services), not 336415. Rocket Lab and Firefly likewise build engines captively. So the $19.5 billion "merchant" figure captures companies that sell propulsion units and parts to others; it misses the captive engine production now happening inside the launch industry, which is large and growing. The flip side of the same fact is that this is the opposite of a "many tiny operators" undercount — it is a hyper-concentrated, government-anchored industry where a few plants carry the whole code. For rough external scale, independent analysts size the U.S. missile-propulsion segment alone at roughly $5 billion in 2025, growing at a mid-single-digit annual rate — one slice of a broader propulsion economy that also includes space-launch and in-space engines [28].

4. The investable universe

There is no pure public-equity play on 336415. Every listed route bundles propulsion inside a bigger business. The cleanest exposures today:

Major private / other owners (not listed — private investors only):

• SpaceX — highest-volume rocket-engine production in the world (Merlin, Raptor); accessible only via late-stage private shares/secondaries.
• Blue Origin (Jeff Bezos) — BE-4 (also sold to United Launch Alliance) and BE-3.
• Ursa Major — venture-backed liquid engines (Hadley, Draper, Arroway) now expanding into solid motors [15].
• Anduril (via its Adranos acquisition) — new Mississippi SRM factory targeting ~6,000 tactical motors/year by end-2026, aiming to become the U.S. "third" SRM supplier [14].
• X-Bow Systems — additively manufactured solid motors [14].
• AE Industrial Partners (private equity) — agreed in Jan 2026 to buy a 60% majority of Aerojet's space propulsion and power business for $845M [8][32].

5. How the money works

Owners in this industry make money on long-cycle government programs, not on a spot market. The manufacturing process is program-driven rather than catalog-driven: a propulsion supplier collaborates with a missile or launch-vehicle prime during requirements definition, design, testing, and qualification. Qualification can require repeated static firings, environmental testing, material-lot validation, destructive inspection, and extensive configuration documentation. Once a motor or engine is qualified for a weapon or launch vehicle, changing suppliers or propulsion technology can require redesign and requalification of the larger system — creating unusually sticky incumbent positions but also making production problems consequential.

The economics that matter:

• Backlog and book-to-bill. Revenue is recognized over the life of multi-year contracts (percentage-of-completion). The health signal is backlog and the book-to-bill ratio (new orders ÷ revenue): above 1.0 means the order book is growing. Given today's demand, backlogs are the story.
• Production rate and capacity utilization. Because demand exceeds supply, the binding constraint is how many motors per year a plant can pour and cure. Northrop reported roughly 13,000 rocket motors produced in 2024 and has said it aims to roughly double SRM capacity, targeting ~25,000 units/year later this decade [17]. Every incremental unit off a mostly fixed-cost plant is high-margin — capacity utilization is the profit lever.
• Contract type sets the margin. Cost-plus contracts (the government reimburses cost plus a set fee) cap upside but remove risk; fixed-price development contracts can produce outright losses if a program runs over. L3Harris reports that 75% of company-wide revenue comes from fixed-price contracts, illustrating the inflation and execution exposure [16]. For historical propulsion-specific benchmarks, standalone Aerojet Rocketdyne's 2022 contract mix was 55% fixed-price and 45% cost-reimbursable, with an 11.3% segment margin on $2.24 billion of aerospace-and-defense sales [33].
• Government co-investment in capex. Because the Pentagon is essentially the only buyer, it pays to expand the plants: a ~$1B Pentagon investment into the L3Harris motor spin-off [7], NewMarket's ~$100M+ ammonium-perchlorate expansion [18], Northrop's $1B+ in facility spending since 2018 [17], and a $215.6 million award to Aerojet to modernize three sites and increase Javelin, Stinger, and GMLRS production capacity [21]. That lowers the private capital owners must risk.
• Monopsony pricing and audit. With one dominant customer, prices are negotiated and cost-audited (the Defense Contract Audit Agency reviews costs under the Federal Acquisition Regulation), not set by open competition.
• Expendable vs. reusable. Defense motors are consumed on a single shot — one launch, one sale. Launch-engine economics are different: SpaceX, Blue Origin, and Rocket Lab reuse engines across many flights, amortizing each engine's cost, which is why the captive launch side can be profitable at high cadence even though it sits in adjacent NAICS codes.

6. What drives demand

Defense (the dominant driver today).

• Munitions replenishment. Stockpiles drawn down by aid to Ukraine and Israel and by interceptor use in the Red Sea have to be rebuilt, straining SRM supply for GMLRS, Standard Missile, PAC-3, and others [9][11]. The fiscal-2026 Defense budget request included $34 billion of weapons procurement and RDT&E, with requested quantities including 139 SM-6 missiles ($1.26B), 57 Tomahawks ($946M), 534 AMRAAMs ($816M), and 238 LRASMs ($1.17B) — these are complete-system amounts, not propulsion revenue alone [19].
• Government investment in capacity. The Pentagon is funding supply-chain expansion directly: approximately $260 million of fiscal-2024–2026 funding for solid-motor manufacturing, $75 million for the hypersonic industrial base, and $117 million for other missile and munition shortfalls including critical chemicals [20].
• Golden Dome. The Trump administration's homeland missile-defense initiative — cost estimates ranging from ~$175 billion (White House) to ~$1.2 trillion over 20 years (Congressional Budget Office), with roughly $24.4B appropriated for FY2025 and ~$13B for FY2026 — envisions thousands of interceptors, each needing a motor [24]. This is a forward-looking, not-yet-built program, but it is already pulling propulsion demand.
• Strategic recapitalization and hypersonics: the Sentinel ICBM (intercontinental ballistic missile) program, Trident submarine-launched missiles, and hypersonic weapons all require new large motors [17].

Space.

• Launch cadence boom. FAA-licensed launches and reentries increased from 14 in fiscal 2015 to 148 in fiscal 2024 — growth of more than 900% — and the FAA expects activity to more than double by fiscal 2028 [22]. Mega-constellations (Starlink, Amazon's Kuiper) and national-security launch keep launch rates climbing, pulling engine demand on the captive side. Reusability weakens the relationship between missions and new engines, while vertical integration means rising launch activity does not necessarily enlarge the merchant engine market.
• NASA: the Space Launch System (SLS) uses Northrop's five-segment boosters and Aerojet's RS-25 engines; RL10 powers many upper stages [17][27]. SLS's long-term funding is contested: the fiscal-2026 proposal provided $1.79 billion for SLS but contemplated phasing it out after Artemis III, reducing funding to $600 million in fiscal 2028 and zero in fiscal 2029–2030 [23]. That is a risk to heritage RS-25 and large-booster production but potentially an opportunity for commercial launch and in-space propulsion providers.

7. Regulation

• Export control is central. Rocket engines, motors, and their components are on the U.S. Munitions List (Category IV) and controlled under the International Traffic in Arms Regulations (ITAR), administered by the State Department. The Commerce Control List also identifies liquid, solid, and hybrid rocket propulsion systems and components as subject to ITAR, with missile end-use rules imposing additional restrictions [34][35]. Licensing constrains who can be a supplier, partner, or foreign customer, and raises the barrier to entry.
• Antitrust. When Northrop bought SRM-maker Orbital ATK in 2018, the Federal Trade Commission (FTC) required Northrop to supply solid rocket motors to rival missile primes on a non-discriminatory basis and to firewall its motor unit from the rest of the company [10]. In 2026 Northrop petitioned the FTC to lift that order; Lockheed Martin — which must buy motors from its competitor — publicly opposed removing the firewall [12][13]. How this resolves shapes whether the two-supplier structure tightens or loosens.
• Contracting rules. Cost-plus work is governed by the Federal Acquisition Regulation and Cost Accounting Standards, with Defense Contract Audit Agency cost audits; the Defense Production Act lets the Pentagon fund capacity directly.
• Environmental, safety, security. Perchlorate is a regulated water contaminant (Environmental Protection Agency); propellant is an explosive (ATF/OSHA handling rules and legacy site cleanup in Nevada and Utah); the work requires security clearances and defense cybersecurity (CMMC) compliance.

8. Competitive dynamics and consolidation

The structure has swung through two phases and may be entering a third.

Consolidation (1990s–2023): the U.S. shrank from roughly six SRM suppliers in 1995 to two by 2017 [36]. A GAO review found that one motor manufacturer estimated its supporting raw-material, component, and subsystem supplier population had fallen from about 5,000 to 1,000 over 20 years [36]. The FTC subsequently alleged that Aerojet Rocketdyne and Northrop Grumman supplied more than 90% of U.S. solid-rocket-motor sales and described Aerojet as the last independent significant domestic missile-propulsion supplier at that time [37]. Then the primes absorbed the survivors: Northrop bought Orbital ATK (2018) and L3Harris bought Aerojet Rocketdyne for $4.7B (2023) [4][10]. That vertical integration is exactly what triggered the FTC's non-discrimination remedy: motor makers now sit inside companies that compete with their own motor customers.

Re-fragmentation at the edges (2023–present): worried about a two-supplier chokepoint, the Pentagon is deliberately funding new entrants — Ursa Major, X-Bow, and Anduril/Adranos — to become third and fourth sources [14][15]. In parallel, L3Harris is un-bundling Aerojet: selling a 60% majority of the space-propulsion/power business to private-equity firm AE Industrial for $845M (retaining the RS-25 engine line), and separately carving out the solid-rocket-motor business as "Missile Solutions" for a planned 2026 IPO, backed by a ~$1B Pentagon investment [6][7][8].

Captive vs. merchant split: on the commercial launch side, SpaceX and Blue Origin build engines only for themselves (Blue Origin being the exception that also sells BE-4 to United Launch Alliance) [27]. Their scale and vertical integration are reshaping the broader propulsion base even though they largely bypass the merchant market this code measures.

9. Risks

• Single-source fragility. Ammonium perchlorate — the oxidizer in most solid propellant — has had only one North American producer (American Pacific) for decades; a Defense Department Inspector General review documented this dependence on a single approved domestic source [18][38]. A single plant disruption ripples through every missile line. Skilled propulsion labor and specialized test stands are similarly scarce.
• Labor constraints. Cleared propulsion engineers and experienced energetic-material manufacturing personnel cannot be added quickly. L3Harris explicitly identifies competition for engineers and employees able to obtain top-secret or higher clearances, with shortages raising recruiting and training costs [16].
• Monopsony / budget risk. With the government as near-sole customer, program cancellations, continuing resolutions, or a change in priorities (e.g., SLS or Golden Dome funding) can erase a demand line quickly.
• Fixed-price development losses. Underbid or troubled development programs have produced multi-hundred-million-dollar write-offs across defense propulsion.
• Execution and quality. Propulsion is unforgiving: a solid-booster nozzle anomaly on United Launch Alliance's Vulcan (Oct 2024) and a further booster issue (early 2026) paused flights pending investigation [27]. Northrop warns that unintended initiation, explosions, and hazardous-material handling can cause injury, property destruction, production shutdowns, and environmental liabilities [30]. Quality escapes carry outsized cost.
• New-entrant qualification risk. Startups must survive years of qualification testing before a motor flies on a weapon; many will not clear that bar, and their scale-up timelines can slip. Announcing a factory or demonstrating a motor is not equivalent to holding a qualified full-rate production position.
• Regulatory/antitrust uncertainty. The pending FTC decision on Northrop's firewall, plus ITAR licensing, can shift competitive access.
• Reusability disruption. On the commercial launch side, reusable engines reduce the number of new engines needed per unit of activity — a headwind for merchant engine volume even as defense (single-shot) demand rises.

10. How to invest, and the outlook

Public-market routes. No listed company is a pure 336415 play; propulsion is always a segment inside something larger.

• Diversified primes: L3Harris (LHX) has the most concentrated propulsion exposure among the primes, and its planned Missile Solutions IPO (S-1 filed confidentially, expected 2H 2026) would create the closest thing yet to a public pure-play on solid rocket motors [6][7][31]. Northrop Grumman (NOC) is the largest merchant motor maker but propulsion is a modest slice of a diversified defense giant [17].
• Launch companies with captive propulsion: Rocket Lab (RKLB) and Firefly (FLY, IPO'd 2025) build their own engines, but you are buying a whole launch-and-space business, not the propulsion line alone [25][26].
• Upstream materials: NewMarket (NEU) owns the sole U.S. ammonium-perchlorate supplier — a narrow but strategic chokepoint play [18].
• Indirect: Boeing (BA) and Lockheed (LMT) carry small, diffuse exposure via United Launch Alliance [27].

Private-market routes. The most economically significant producers are private: SpaceX and Blue Origin (accessible only through late-stage secondaries or private funds), and the emerging motor startups Ursa Major, X-Bow, and Anduril [14][15]. Private equity now has a direct seat too, via AE Industrial's majority stake in Aerojet's space-propulsion unit [8]. Private underwriting must distinguish demonstrated motors, qualified programs, funded production awards, and merely announced capacity.

Near-term drivers to watch (forward-looking). The investment case rests less on winning new demand than on building capacity to serve demand that already exists. Watch (1) whether SRM production ramps hit their targets (Northrop toward ~25,000 motors/year; Anduril toward ~6,000 tactical motors/year by end-2026) [14][17]; (2) the terms and reception of the L3Harris Missile Solutions IPO [6][7]; (3) the FTC's ruling on Northrop's firewall, which will signal whether the market re-opens to more suppliers [12][13]; (4) Golden Dome funding and interceptor quantities converting into motor orders [24]; and (5) ammonium-perchlorate capacity, the industry's narrowest single point of failure [18]. In our judgment, defense propulsion demand is structurally elevated for years and supply is the binding constraint — so returns will accrue to whoever can add qualified capacity fastest, and the risk is concentrated in execution, quality, and the government budget cycle rather than in end-market demand.

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Sources

1. U.S. Census Bureau, NAICS Definitions (NAICS 336415 scope). https://www.census.gov/naics/resources/archives/sect31-33.html
2. U.S. Census Bureau, 2022 Economic Census — Concentration Ratios / Selected Statistics (NAICS 336415: receipts, firm count, CR4/CR8/CR20/CR50, HHI suppressed). https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip
3. U.S. Census Bureau, County Business Patterns 2023 (NAICS 336415: establishments, employment, annual payroll). https://www.census.gov/programs-surveys/cbp.html
4. L3Harris Technologies, "L3Harris Completes Aerojet Rocketdyne Acquisition," 2023. https://www.l3harris.com/newsroom/press-release/2023/07/l3harris-completes-aerojet-rocketdyne-acquisition
5. U.S. Small Business Administration, Table of Small Business Size Standards (NAICS 336415: 1,250 employees), 2023. https://www.sba.gov/document/support-table-size-standards
6. L3Harris Technologies, "L3Harris Accelerates 'Arsenal of Freedom' with Creation of a New Missile Solutions Company," 2026. https://www.l3harris.com/newsroom/press-release/2026/01/l3harris-accelerates-arsenal-freedom-creation-new-missile-solutions
7. Breaking Defense, "Pentagon to invest $1B in L3Harris solid rocket motor spin-off," 2026. https://breakingdefense.com/2026/01/pentagon-to-invest-1b-in-l3harris-solid-rocket-motor-spin-off/
8. SpaceNews, "L3Harris to sell majority stake in space propulsion unit to AE Industrial for $845 million," 2026. https://spacenews.com/l3harris-to-sell-majority-stake-in-space-propulsion-unit-to-ae-industrial-for-845-million/
9. SpaceNews, "Missile production push runs into solid rocket motor bottleneck," 2024. https://spacenews.com/missile-production-push-runs-into-solid-rocket-motor-bottleneck/
10. U.S. Federal Trade Commission, "FTC Imposes Conditions on Northrop Grumman's Acquisition of Solid Rocket Motor Supplier Orbital ATK, Inc.," 2018. https://www.ftc.gov/news-events/news/press-releases/2018/06/ftc-imposes-conditions-northrop-grummans-acquisition-solid-rocket-motor-supplier-orbital-atk-inc
11. FlightGlobal, "US manufacturers ramp solid rocket motor production amid surging munitions demand," 2024. https://www.flightglobal.com/defence/us-manufacturers-ramp-solid-rocket-motor-production-amid-surging-munitions-demand/160476.article
12. Breaking Defense, "Lockheed opposes Northrop bid to remove firewall on solid rocket motor business," 2026. https://breakingdefense.com/2026/05/lockheed-opposes-northrop-bid-to-remove-firewall-on-solid-rocket-motor-business/
13. U.S. Federal Trade Commission, "FTC Seeks Public Comment on Petition to Modify Northrop Grumman Final Order," 2026. https://www.ftc.gov/news-events/news/press-releases/2026/04/ftc-seeks-public-comment-petition-modify-northrop-grumman-final-order
14. TechCrunch, "Anduril opens solid rocket motor factory amidst ongoing chemical chokepoint," 2025. https://techcrunch.com/2025/08/12/anduril-opens-solid-rocket-motor-factory-amidst-ongoing-chemical-chokepoint/
15. Breaking Defense, "Ursa Major takes aim at DoD solid rocket motor market," 2023. https://breakingdefense.com/2023/11/ursa-major-takes-aim-at-dod-solid-rocket-motor-market/
16. L3Harris Technologies, 2025 Form 10-K (contract type, labor constraints, Aerojet segment results). https://www.sec.gov/Archives/edgar/data/202058/000020205826000015/hrs-20260102.htm
17. Northrop Grumman, "Solid Rocket Motors" and "Boosting Production" (capacity and program facts), 2025. https://www.northropgrumman.com/who-we-are/the-facts/solid-rocket-motors-propulsion
18. SpaceNews, "American Pacific Corporation Finalizes $100 Million Capacity Expansion with Parent Company Approval," 2025; NewMarket Corporation, "American Pacific Corporation Announces Production Expansion," 2025. https://spacenews.com/american-pacific-corporation-finalizes-100-million-capacity-expansion-with-parent-company-approval/
19. Department of Defense, FY2026 Budget Request Overview (weapons procurement and RDT&E). https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/FY2026_Budget_Request_Overview_Book.pdf
20. Department of Defense, FY2026 Procurement Budget Justification (solid-motor and industrial-base funding). https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/budget_justification/pdfs/02_Procurement/PROC_DPAP_PB_2026.pdf
21. Department of Defense, "DoD Strengthens Supply Chain for Solid Rocket Motors" (Aerojet $215.6M award), 2023. https://www.defense.gov/News/Releases/Release/Article/3362263/dod-strengthens-supply-chain-for-solid-rocket-motors/
22. FAA, "New Record: FAA-Licensed Commercial Space Operations," 2024. https://www.faa.gov/newsroom/new-record-faa-licensed-commercial-space-operations-aerospace-rulemaking-committee
23. NASA, FY2026 Budget Technical Supplement (SLS funding outlook). https://www.nasa.gov/wp-content/uploads/2025/05/fy-2026-budget-technical-supplement-002.pdf
24. Center for Arms Control and Non-Proliferation, "Fact Sheet: 'Golden Dome'"; Congressional Budget Office cost estimate, 2026. https://armscontrolcenter.org/fact-sheet-golden-dome/
25. FinancialContent / MarketMinute, "Rocket Lab Hits Record $600M Revenue in 2025," 2025; Rocket Lab USA (Nasdaq: RKLB) financial disclosures. https://markets.financialcontent.com/wral/article/marketminute-2025-12-31-rocket-lab-hits-record-600m-revenue-in-2025-but-delays-neutron-maiden-flight-to-2026
26. CNBC, "Firefly Aerospace soars over 30% in market debut to land at $8.5 billion valuation," 2025. https://www.cnbc.com/2025/08/07/rocket-maker-firefly-aerospace-fly-stock-ipo.html
27. Spaceflight Now, "ULA launches Vulcan rocket on first Space Force mission," 2025 (United Launch Alliance / Blue Origin BE-4 / Northrop SRB anomaly). https://spaceflightnow.com/2025/08/13/ula-launches-vulcan-rocket-on-first-space-force-mission/
28. Mordor Intelligence, "Missile Propulsion System Market Size, Share & Growth Trends" (market context, ~$5.3B 2025), 2025. https://www.mordorintelligence.com/industry-reports/missile-propulsion-system-market
29. L3Harris Technologies, "L3Harris Reports Strong Full-Year and Fourth Quarter 2025 Results" (Aerojet segment financials). https://investors.l3harris.com/news/news-details/2026/L3Harris-Technologies-Reports-Strong-Full-Year-and-Fourth-Quarter-2025-Results-Initiates-2026-Guidance/default.aspx
30. Northrop Grumman, 2025 Form 10-K (Space Systems segment, risk disclosures). https://www.sec.gov/Archives/edgar/data/1133421/000113342126000003/noc-20251231.htm
31. L3Harris Technologies, "L3Harris Announces Confidential Submission of Draft Registration Statement for Missile Solutions," 2026. https://www.l3harris.com/newsroom/press-release/2026/04/l3harris-announces-confidential-submission-draft-registration
32. L3Harris Technologies, "L3Harris to Sell Majority Stake in Space Propulsion & Power Business to AE Industrial Partners," 2026. https://investors.l3harris.com/news/news-details/2026/L3Harris-to-Sell-Majority-Stake-in-Space-Propulsion--Power-Business-to-AE-Industrial-Partners/default.aspx
33. Aerojet Rocketdyne, 2022 Form 10-K (standalone segment margins and contract mix). https://www.sec.gov/Archives/edgar/data/40888/000004088823000005/ajrd-20221231.htm
34. Bureau of Industry and Security, Interactive Commerce Control List (rocket propulsion export controls). https://www.bis.gov/regulations/ear/interactive-commerce-control-list?category=3&keyword=3a090
35. Bureau of Industry and Security, Missile End-Use Restrictions. https://media.bis.gov/regulations/ear/part-744/section-744.3/restrictions-certain-rocket-systems-including-ballistic-missiles-space-launch
36. U.S. Government Accountability Office, Solid Rocket Motors: DOD Faces Challenges Stemming from Concentration of the Industrial Base, GAO-18-45, 2017. https://www.gao.gov/products/gao-18-45
37. U.S. Federal Trade Commission, Complaint in the Matter of Lockheed Martin Corporation / Aerojet Rocketdyne Holdings, Inc., Docket No. 9405, 2022. https://www.ftc.gov/system/files/documents/cases/d09405lockheedaerojetp3complaintpublic.pdf
38. Department of Defense Inspector General, Audit of DoD's Management of the Solid Rocket Motor Industrial Base, DODIG-2020-095, 2020. https://media.defense.gov/2020/Jul/13/2002452356/-1/-1/1/DODIG-2020-095.PDF