Largest Government Contractors: Top 10 and Sources

By GovHub team · October 19, 2026 · Updated October 19, 2026

Largest government contractors, quick answer and current snapshot

If you want the list fast, use USAspending.gov. For FY 2023 prime obligations, the names you should expect near the top include Lockheed Martin, RTX, General Dynamics, Boeing, Northrop Grumman, Humana Government Business, Leidos, L3Harris, UnitedHealth, and Huntington Ingalls. You will also see McKesson, Booz Allen Hamilton, SAIC, and KBR in the top twenty. To get the exact current top 10 with dollars, open USAspending, choose Award Spending by Recipient, set Fiscal Year to FY 2023 or FY 2024 YTD, Prime Awards only, All Agencies or a specific one, sort by Obligations, and export. That is the authoritative list for federal prime obligations.

Two cautions. USAspending shows federal obligations, not corporate revenue. Most media lists mix different bases and timeframes. When you compare, keep the unit constant, fiscal year obligations to primes, or you will draw the wrong conclusion.

Top government contractors, sources that actually count

There are four sources you will see. Only two are primary data.

• USAspending.gov. This is the public front end for FPDS and related federal award systems. Use it for prime obligations by vendor, agency, NAICS, PSC, and period of performance. It is the cleanest way to answer largest federal contractors by dollars.
• FPDS beta data feeds. USAspending already rolls these up for you. Use FPDS only if you need line level fields not exposed in USAspending.
• Washington Technology Top 100. This ranks by prime contracting revenue reported by the companies. Good for industry context. Do not mix this with USAspending obligations.
• BGOV200 and GovWin lists. Useful for market intel. They often follow obligations, but methods differ.

When someone asks biggest government contractors, clarify the unit. Obligations to primes in FY 2023 is not the same as total company revenue, and it is not the same as total contract ceiling value. If a list uses estimated revenue or includes subcontract dollars, say so before you use it in a decision.

If you need a refresher on which federal portals matter and why, this short guide will save you hours: Government Hub: The Federal Portals That Actually Matter.

Largest federal contractors by segment, what you will actually see

You do not compete with all of the top vendors. You compete with the top vendors in your slice of the market. Here is what reliably floats to the top by segment when you look at obligations.

• DoD, hardware and platforms. Lockheed Martin, RTX, General Dynamics, Boeing, Northrop Grumman, L3Harris, and Huntington Ingalls dominate. Shipbuilding and aircraft programs skew the dollars into a few primes.
• DoD, IT and services. Leidos, Booz Allen Hamilton, SAIC, CACI, Accenture Federal, Perspecta heritage firms, and KBR often populate the top tier depending on the year and vehicle mix.
• Health, VA and DHA. Humana Government Business, UnitedHealth, and TriWest appear high due to TRICARE and Community Care obligations. McKesson and other distributors rise for pharmaceuticals and medical supply.
• Civilian engineering and energy. Bechtel, Amentum, Jacobs, and similar firms rank high at DOE and DHS for complex site management and construction. NASA awards can place Boeing and SpaceX near the top for specific years.

This is directional on purpose. Pull your own list for the agency, NAICS, and PSC you sell. It is the only way to be precise for capture.

Top 10 government contractors, how to build the list you actually need

Use this to pull a defensible top 10 in five minutes. No subscription needed.

Checklist

1. Go to USAspending.gov, choose Award Spending by Recipient.
2. Time period. Select Fiscal Year, choose FY 2023 for a full year, or FY 2024, Year to Date.
3. Prime awards only. Toggle to Prime Awards. Leave Subawards off if you are ranking primes.
4. Filters. Add Agency if you care about one department. Add NAICS if you want to narrow to your services, for example 541512 or 541519. Add PSC if you prefer PSC detail, for example D399 for IT services other.
5. Award type. Include contracts. Exclude grants, loans, and other financial assistance. If you only sell task orders, you can include Delivery and Task Orders.
6. Sort and export. Sort by Obligations, descending. Click Download to CSV. Keep the FY and filter set in your file name so you do not mix runs.
7. Sanity check. If the list shows unexpected subsidiaries, roll them up by parent DUNS or UEI if you care about corporate families. USAspending exposes parent fields in the export.

If you need to drill into a single contract to see the total awarded amount, here is the fastest path with field names and screenshots: How to find the total awarded amount on a federal contract.

Worked example, pull the top DHS cybersecurity IT services vendors

Scenario. You sell cybersecurity engineering and monitoring services to DHS components. You want the current top vendors for targeting and teaming.

Steps

1. USAspending.gov, Award Spending by Recipient.
2. Time period, Fiscal Year, FY 2023. You can also run FY 2024 YTD for trend.
3. Prime Awards only.
4. Agencies. Select Department of Homeland Security.
5. Award Type. Contracts, include Definitive Contracts and Delivery or Task Orders.
6. NAICS. Add 541512, Computer Systems Design Services, and 541519, Other Computer Related Services. If you prefer PSC, add D399, IT and Telecom, Other IT and Telecommunications. Keep both approaches and see which aligns better with your pipeline.
7. Click Update. Sort by Obligations.
8. Export CSV. In the export, use the Recipient and Parent Recipient fields to group.

What you will see. Large integrators and consultancies frequently appear in the top ten for this run. Expect names like Leidos, Booz Allen Hamilton, Accenture Federal, SAIC, CACI, and General Dynamics IT to show up. You may also see mid tiers and joint ventures depending on DHS vehicles like EAGLE II legacy task orders, PACTS, and FirstSource follow ons. Use the CSV to pivot by Parent Recipient and by Subagency to separate CISA, CBP, ICE, TSA, and USCIS.

Follow up. Click a vendor row, then View this recipient’s awards to see which vehicles and task orders drive the dollars. Note the vehicle and contracting office. That becomes your capture map.

Biggest government contractors, how to use the list for capture

A ranked list is not the business outcome. Here is how to make it pay off in real pursuits.

• Downselect who actually touches your buyers. Sort the export by Subagency and Contracting Office. If your buyer is CISA, a top vendor that only sells to CBP is not relevant.
• Map vehicles. In the award CSV, use IDV Type and Solicitation ID to identify the vehicles and IDIQs that drive spend. Put those vehicles at the top of your capture calendar.
• Decide compete vs team. If an incumbent sits on 70 percent of the obligations in your subagency for your NAICS, plan a team or a niche compete on a small business set aside. FAR 19.5, 13 CFR 125.2, and your set aside status drive your path.
• Engage small business offices. Large primes with contracts over the thresholds must maintain small business subcontracting plans under FAR 19.7 and clause 52.219-9. Thresholds, $750,000 for most contracts, $1.5 million for construction. Ask for their small business liaison and their supplier portal. They track goals by NAICS and agency.
• Prepare your proof. If you want to team with top primes, have CPARS ready under FAR 42.1503, Section C past performance snippets sized to two pages, and a one page capability statement with UEI, CAGE, and NAICS codes. If you are missing basics like SAM under FAR 4.1102, fix that first.

If you want a deeper primer on working with large primes, this break down covers how they buy, what they expect, and the next steps after an intro call: Top Government Contractors: Who They Are and How to Work With Them.

Common mistakes when reading top contractor lists

• Mixing the unit. Obligations to primes in FY 2023 is not revenue, not ceiling, and not bookings. Only compare obligations to obligations.
• Forgetting the FY. A YTD snapshot in June will shift by September. Time box the analysis and label it. Your capture decisions should match the period used.
• Counting grants. If you leave Assistance on, your top ten will be wrong. Filter to Contracts.
• Double counting subsidiaries. USAspending can list subsidiaries under the parent or the child. Use Parent Recipient Name to aggregate, or be explicit about child performance if that is what matters to your teaming.
• Ignoring IDVs. If you look at base IDIQ awards instead of task orders, you will inflate numbers with ceilings that never obligate. Filter to task orders to see real spend.
• Assuming the same top 10 across agencies. DoD and VA do not share the same vendor mix. Pull agency specific lists when you plan your year.

Largest federal contractors, why it matters when you write proposals

Evaluation is about Section M, not logo size. Large primes win because they submit compliant, scoring proposals on the right vehicles, with prior work that matches the PWS. You can do the same.

• Read Section L and Section M. FAR 15.304 tells you what matters, Section M applies it. Build your outline from Section L instructions, then trace every requirement to your response. If your team needs a refresher on L and M, we wrote a step by step guide that pairs with your next RFP.
• Build a compliance matrix early. Missing a small item in Section L will cost you more often than weak writing. If you want a quick pattern, we cover formats, fields, and pitfalls in our matrix article.
• Do color team reviews on time. Pink, Red, and Gold reviews catch compliance and content gaps before they hit the final. Skip them and you drift.

We keep a practical how to library if you need it during a live bid, from reading L and M to finding total obligations. Start with these two and branch from there: Government Hub: The Federal Portals That Actually Matter and How to find the total awarded amount on a federal contract. For a curated top 10 write up, see Biggest Government Contractors: The Real Top 10.

Tools that make this faster

You can do all of this manually with USAspending and a spreadsheet. If you want to cut the mechanical work and keep the judgment, GovHub can import RFPs, build a clean Section L and M compliance matrix, and track the buyer and vehicle details you pulled from USAspending without extra tabs. Use the tool you prefer. Keep your data labeled by FY, agency, vehicle, and unit of measure. That discipline is what turns a list into wins.