Space Launch System (SLS)
The most powerful rocket NASA has ever flown, the Space Launch System is the only existing US vehicle capable of sending a crewed Orion to lunar orbit in a single launch [1]. Its $24B+ development cost and ~$2.5B+ per-flight production-and-operations price tag — recurring OIG findings — make it the largest and most politically contested element of the Artemis architecture, with Block 1B and Block 2 upgrades still ahead [2][3].
Funding & Contract Structure
Total committed: Over $24B spent on SLS development through Artemis I (NASA OIG / GAO findings); cumulative commitments rising with Block 1B and EUS development [2][3]
Annual run-rate: FY2025 Deep Space Exploration Systems line includes SLS production at ~$2.6B; FY2027 budget request submitted April 2026 [6]
Per launch: Approximately $2.5B per SLS launch (production + operations) per NASA OIG SP-7 (2024); $4.1B per Artemis launch when Orion + ground systems are included [2]
Procurement vehicle: COST-PLUS — Government pays incurred costs plus a fee — contractor bears low risk; cost overruns common.
Congressional status: Sustained Senate Launch System support — bipartisan in Senate, more critical in House; FY2025 enacted appropriations preserve SLS funding through Artemis IV [6]
GAO / CRS findings
| Date | Finding |
|---|---|
| NASA OIG IG-24-015 — SLS Block 1B development beset by Boeing's ineffective quality management, inexperienced workforce, and continued cost growth threatening Artemis IV schedule[3] | |
| NASA OIG SP-7 estimated SLS production-and-operations cost at $2.5B per flight; total Artemis cost per launch is approximately $4.1B including Orion and ground systems[2] | |
| NASA OIG IG-22-003 — SLS schedule risk and contract management; Stages contract value rose from $4.2B to nearly $11.8B by Artemis IV[7] |
Beneficiary Breakdown
| Contractor | Role | Share | Ticker |
|---|---|---|---|
| Boeing | prime | SLS core stage and Block 1B Exploration Upper Stage (EUS) prime; Stages contract increased from $4.2B to ~$11.8B through Artemis IV per OIG[7] | BA |
| Northrop Grumman | prime | Five-segment Solid Rocket Boosters (two per flight) and the future Booster Obsolescence and Life Extension (BOLE) program for Block 2[4] | NOC |
| Aerojet Rocketdyne (L3Harris) | prime | RS-25 engines (four per core stage) restart contract through Artemis IX; Aerojet acquired by L3Harris in 2023[8] | LHX |
| Jacobs | sub | Test and Operations Support Contract at Marshall and Stennis; major contributor to SLS ground operations and integration[1] | J |
| Teledyne Brown | supplier | SLS payload adapter and structural fabrication for the core stage and EUS; subcontractor on Boeing-led integration[1] | TDY |
Key Milestones
NASA announces SLS design; replaces Constellation Ares V with a Shuttle-derived super-heavy architecture
Critical Design Review completed; Stages contract awarded to Boeing for core stage manufacturing
Green Run hot-fire test of SLS core stage completed at Stennis; clears path to Artemis I
Artemis I — first SLS flight; 25.5-day uncrewed Orion lunar mission, 1.4M-mile distant retrograde orbit
NASA OIG IG-24-015 — Block 1B/EUS development cited for cost growth, Boeing quality management, workforce inexperience
Artemis II — second SLS flight and first crewed flight; nine-day lunar flyby with four astronauts
Artemis III — third SLS Block 1 flight; HLS LEO rendezvous-and-docking demonstration
Artemis IV — first flight of SLS Block 1B with Exploration Upper Stage; first crewed lunar landing
Catalysts
| Date | Event | Sentiment |
|---|---|---|
| Artemis III SLS Block 1 launch — third SLS flight; tests LEO HLS rendezvous-and-docking[1] | bullish | |
| Artemis IV — first flight of SLS Block 1B with Exploration Upper Stage; first crewed lunar landing[1] | bullish | |
| Artemis V launch — fifth SLS flight; sustains production cadence and supports Gateway assembly[1] | bullish | |
| Boeing EUS Critical Design Review and Green Run testing — gating Block 1B operational readiness[3] | neutral | |
| FY2028 NASA budget request — Congressional posture on SLS funding given recurring per-flight cost findings[6] | neutral |
Risk Register
Competitive Landscape
Investability Map
| Ticker | Exposure | Note |
|---|---|---|
| BA | high | Boeing is the largest SLS contractor via core stage and EUS; Stages contract scaled to ~$11.8B through Artemis IV per OIG. Quality findings are a known risk. |
| NOC | high | Northrop Grumman supplies both solid rocket boosters per SLS launch and leads the BOLE upgrade for Block 2; durable revenue line through 2030s. |
| LHX | medium | L3Harris (post Aerojet Rocketdyne acquisition) supplies RS-25 engines; restart-line ramp is a multi-billion-dollar engineering and revenue line. |
| J | low | Jacobs Solutions provides test, operations, and engineering services at Marshall/Stennis; SLS is one of several agency programs in its portfolio. |
Not investment advice. Figures as-quoted from cited sources.
Sources
- [1] NASA — Space Launch System program overview (Agency budget doc, accessed )
- [2] NASA OIG SP-7 — NASA's Transition of the Space Launch System to a Commercial Services Contract (2024) — per-flight cost $2.5B production+ops, $4.1B with Orion+ground (GAO / CRS report, accessed )
- [3] NASA OIG IG-24-015 — NASA's Management of Space Launch System Block 1B Development (Aug 8, 2024) (GAO / CRS report, accessed )
- [4] NASA — SLS Block 1 reference (8.8M lbf liftoff thrust; RS-25 engines and 5-segment solid boosters) (Agency budget doc, accessed )
- [5] NASA — Artemis II mission page (launched Apr 1 / completed Apr 10, 2026) (Agency budget doc, accessed )
- [6] NASA — Fiscal Year 2025 Budget Estimates (Agency budget doc, accessed )
- [7] NASA OIG IG-22-003 — NASA's Management of the Space Launch System Stages Contract; Stages contract growth $4.2B → $11.8B through Artemis IV (GAO / CRS report, accessed )
- [8] NASA — RS-25 Engine restart contract overview (Aerojet Rocketdyne / L3Harris); engine production for SLS Artemis V and beyond (Agency budget doc, accessed )
- [9] Boeing — SLS program page (core stage and Exploration Upper Stage) (Official company site, accessed )
- [10] Northrop Grumman — SLS solid rocket boosters (Official company site, accessed )
- [11] L3Harris (Aerojet Rocketdyne) — RS-25 engine page (Official company site, accessed )
- [12] GAO-23-105609 — NASA Human Space Exploration: Persistent Delays and Cost Growth Reinforce Concerns Over Management of Programs (GAO / CRS report, accessed )
- [13] Congressional Research Service — NASA Appropriations and Authorization: FY2024 / FY2025 issues affecting SLS (GAO / CRS report, accessed )
- [14] Jacobs Solutions — Space Operations capabilities page (Official company site, accessed )
- [15] SpaceNews — SLS Block 1B EUS development coverage (referenced for industry context on Artemis IV slip) (Industry trade press, accessed )
- [16] Ars Technica — coverage of SLS per-flight cost OIG findings and Trump-era restructuring proposals (Industry trade press, accessed )