Company lists · Data refreshed September 2026
Top 25 Space exploration contractors based in the United States
RevenueBase identified 145 space exploration contractors headquartered in the United States as of September 2026 and tracks 47,606 professional contacts across them, including 2,119 with verified work emails. Houston is the largest hub.
This list covers space exploration contractors headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 18, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest space exploration contractors based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 15,414 contacts → | ||||
Indirect evidence “SpaceX designs, manufactures and launches the world’s most advanced rockets and spacecraft.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 2 | 10,934 contacts → | ||||
Indirect evidence “Blue Origin manufactures and operates rocket engines, reusable launch vehicles, lunar landers, and satellite systems.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,399 contacts → | ||||
Indirect evidence “Orbital ATK is built on the strong heritage of two great companies, Orbital Sciences Corporation and ATK, with a history of collaboration providing reliable, affordable and…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,119 contacts → | ||||
Partial evidence “ULA is redefining what’s possible in space by providing innovative rocketry solutions for national security, NASA, and commercial space launches.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,171 contacts → | ||||
Indirect evidence “SSL, based in Palo Alto, California, is a leading provider of advanced spacecraft systems, with broad expertise to support commercial and government satellite operators and…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,011 contacts → | ||||
Partial evidence “Virgin Galactic is an aerospace and space travel company, pioneering human-first spaceflight for private individuals, researchers, and governments with its advanced SpaceShips and…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 7 | 754 contacts → | ||||
Indirect evidence “Kay and Associates, Inc.(KAI) was established in 1960 by our founder Donald Kay to provide high quality, cost effective solutions in response to the need for engineering and…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 8 | 581 contacts → | ||||
Indirect evidence “Barrios Technology is an award-winning, woman-owned and operated small aerospace business.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 9 | 449 contacts → | ||||
Partial evidence “Intuitive Machines is a leading space infrastructure company that builds spacecraft, connects networks, and operates infrastructure-as-a-service for commercial, civil, and…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 10 | 439 contacts → | ||||
Indirect evidence “At a.i.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 11 | 439 contacts → | ||||
Indirect evidence “Terran Orbital is a leading manufacturer of small satellites primarily serving the United States and Allied aerospace and defense industries.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 12 | 386 contacts → | ||||
Indirect evidence “At ERT, we have been providing high-value solutions and expertise to our partners at U.S.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 13 | 369 contacts → | ||||
Indirect evidence “Reliable.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 14 | 334 contacts → | ||||
Partial evidence “Redwire is a new leader in mission critical space solutions and high reliability components for next generation space systems and infrastructure.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 15 | 313 contacts → | ||||
Partial evidence “Airbus US Space & Defense is a trusted U.S.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 16 | 283 contacts → | ||||
Indirect evidence “MRI Technologies specializes in innovative engineering, software, and mission support solutions for government and aerospace clients.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 17 | 275 contacts → | ||||
Partial evidence “Qualis LLC is a Small Business, headquartered in Huntsville, Alabama, with a 32-year history as a trusted Air Force, Space Force, Army, Joint DoD, Missile Defense Agency, NASA…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 18 | 238 contacts → | ||||
Indirect evidence “I2X Technologies is a reputable technology services company to the Federal Government.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 19 | 236 contacts → | ||||
Indirect evidence “Cimarron is a global solutions company with a strategic partnering approach to satisfying customer-driven requirements.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 20 | 218 contacts → | ||||
Strong evidence “Astrobotic is at the forefront of advancing space exploration and technology development.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 21 | 213 contacts → | ||||
Indirect evidence “Founded in 1984, Omitron, Inc.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 22 | 181 contacts → | ||||
Partial evidence “Established in 1969, Providing Space Systems Research and Development, and Reliability and Quality Assurance Consulting, First Units in Space in 1973.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 23 | 174 contacts → | ||||
Strong evidence “Innoflight is a leading space Non-traditional Defense Contractor (NDC) founded in 2004.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 24 | 130 contacts → | ||||
Partial evidence “Lunar Outpost is the industry leader in commercial space robotics, lunar surface mobility, and in-space infrastructure.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 25 | 129 contacts → | ||||
Indirect evidence “ACT1 Federal LLC ("ACT1"), ACT1 in ACTION is all about taking bold, innovative actions to deliver for our customers and our workforce.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: space exploration contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names space exploration contractors.
- Partial evidence
- Its own public description names part of space exploration contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name space exploration contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 145 space exploration contractors based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,119 reachable decision-makers.
Free signup · no credit card
Space exploration contractors based in the United States at a glance
As of Sep 18, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 145 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among space exploration contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “space exploration contractors”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names space exploration contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among space exploration contractors, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,119 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 18, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names space exploration contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many space exploration contractors are there based in the United States?
RevenueBase identified 145 space exploration contractors headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Spacex, headquartered in Hawthorne, tops this list with the largest team on record.
Which city has the most space exploration contractors?
Houston leads with 11 headquartered companies, followed by Huntsville (8) and Boulder (5).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,119 verified decision-maker contacts tracked across these 145 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 18, 2026.
Ready to reach these companies? Verified emails and direct dials for all 145 space exploration contractors based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
Browse: Companies home · All United States lists · All Space exploration contractors lists · New lists
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States