Biggest Government Contractors: The Real Top 10

By GovHub team · October 12, 2026 · Updated October 12, 2026

Top 10 government contractors, FY2023

If you want the short answer, here it is. Based on FY2023 prime contract obligations, rounded to the nearest billion, the biggest federal contractors were:

• Lockheed Martin, about $44B
• RTX, formerly Raytheon Technologies, about $25B
• General Dynamics, about $20B
• Boeing, about $18B
• Northrop Grumman, about $16B
• McKesson, about $14B
• Leidos, about $14B
• Humana, about $12B
• Booz Allen Hamilton, about $11B
• Huntington Ingalls Industries, HII, about $9B

These figures reflect prime obligations, not commercial revenue, and they move as USASpending updates. Most of this is DoD, with DLA medical supply driving McKesson, and DHA TRICARE driving Humana. If your goal is to team, start with agency alignment, contract vehicles, and whether your past performance fits their gaps, then use FAR 9.6 contractor team arrangements and FAR 19.7 subcontracting rules to structure the deal.

Largest government contractors vs top government contractors

People use these terms sloppily. Be clear on your metric before you quote a list in capture slides.

• Largest by federal prime contract obligations. What most teams mean. Source it to USASpending or FPDS data, and say the fiscal year.
• Largest by total corporate revenue. Not useful for capture. It mixes commercial with federal. Avoid.
• Largest by agency. For example, the Army’s top five will not match HHS. If you sell health IT, HHS, VA, and DHA matter more than Navy shipbuilding.
• Largest by vehicle. For a pursuit on CIO-SP3 or SEWP V, the only list that matters is the top vendors on that vehicle by obligated dollars.

If someone asks for the top government contractors, confirm they mean prime obligations in a stated year. Then you can cite the list above with a straight face.

Top government contractors, FY2023 details you can use

Here is why each name shows up and where they buy.

• Lockheed Martin. F-35, missiles and fire control, space. Heavy with Air Force, Navy, MDA, and FMS through DSCA. Expect FAR Part 15 and FAR 16.5 task order competitions on classified vehicles.
• RTX. Raytheon Missiles and Defense, Collins Aerospace, Pratt and Whitney. Air and missile defense, avionics, engines. Strong missile work with Army and MDA, avionics with Air Force and Navy.
• General Dynamics. Combat systems, IT, shipyards. Army, Marine Corps, Navy, DISA, DHS. If you do cyber, transport, or enterprise IT, GD IT shows up often on IDIQs under FAR 16.505.
• Boeing. Aircraft, rotorcraft, SATCOM, space launch. Air Force and Navy flight programs dominate. Also NASA and commercial crew work.
• Northrop Grumman. Bombers, ICBMs, space payloads, mission systems. Air Force Sentinel, missile warning, and classified space. Expect OCI screens under FAR Subpart 9.5 around systems engineering roles.
• McKesson. DLA medical-surgical prime vendor. If you supply med-surg, pharmacy, or cold chain, this is the hub for DoD logistics buys.
• Leidos. IT, intel, logistics, and health. DISA, DHA, VA, DHS, and IC. Many large service IDIQs and GWAC action under FAR 16.505 ordering procedures.
• Humana. TRICARE East for DHA. Managed care support. Claims processing, networks, and beneficiary services.
• Booz Allen Hamilton. Cyber, analytics, mission IT. DoD, DHS, Treasury, and VA. Strong on MAS and large multi-award IDIQs.
• Huntington Ingalls Industries, HII. Navy carriers and amphibs. Mission technologies also runs C5ISR and training.

Two takeaways matter for small and mid-size firms. First, most dollars flow through IDIQs, GWACs, and BPAs, see FAR 16.5 and FAR 8.405. Second, these primes need credible subs to meet delivery and, on full and open work with goals, to meet FAR 19.7 subcontracting plans and FAR 52.219-9 reporting.

How to verify the biggest contractors yourself in 5 minutes

This is not magic. It is a simple filter and export.

• Go to USASpending and choose Award Search. Set Time Period to Fiscal Year, FY2023. Set Award Type to Contracts only. Set Recipient Type to Company. Click Results and pivot by Recipient Name and Sum of Obligations. Export.
• If you sell to a single agency, add Department Name equals your agency. Then export the agency-specific top 10.
• To see a vehicle, filter by PIID or by Referenced IDV on the Advanced search, then Group by Recipient Name.
• Want to roll up alternate names and divisions. Use the DUNS or UEI to consolidate, check the Parent field, then spot-check a few awards in the download.

If you need a quick refresher on which federal portals matter and why, read our plain-English guide to FPDS, USASpending, SAM, and eSRS in Government Hub. It saves you from hunting across four help sites. See, Government Hub: The Federal Portals That Actually Matter.

When you want the total value on a specific contract, not just obligations to date, look at ceilings on IDVs and at the base plus options on awards. We wrote a short walkthrough with screenshots. See, How to find the total awarded amount on a federal contract.

Largest by civilian vs defense, and why that matters

Defense dominates the top 10. If you sell to civilian agencies, the mix shifts.

• Civilian heavy hitters. Leidos, Booz Allen, Accenture Federal, SAIC, Deloitte, and CGI show up often across VA, DHS, HHS, and Treasury. McKesson also lands high due to DLA medical support that touches VA and HHS during surge buys.
• Vehicles drive share. GSA MAS, OASIS and OASIS+, Alliant 2 and Alliant 3, CIO-SP3 and CIO-SP4, and SEWP V control a lot of civilian IT dollars.
• Ordering rules. Know FAR 16.505 for fair opportunity, exceptions to fair opportunity, and protests, and FAR 8.405 for orders under MAS. Many task orders are Best Value Tradeoff, not LPTA. See FAR 15.304 for evaluation factors that matter.

If you have past performance in a civilian niche, build your own top list by agency in USASpending. Use that, not the defense-heavy national list, to decide your partner targets.

Where the largest contractors compete, by vehicle

If your capture plan ignores contract vehicles, you will chase ghosts. Most dollars to the biggest contractors come through a short list of vehicles.

• DoD service IDIQs. Examples include Army ITES, Navy Seaport NxG, and Air Force EITaaS bridge constructs. Ordering is under FAR 16.505 with short lead times.
• GWACs and MACs. GSA Alliant, OASIS and OASIS+, NASA SEWP, NIH CIO-SP. These are default homes for enterprise IT and advisory support.
• Agency MACs. DHS PACTS, EAGLE II closeouts, ICE and CBP suites, VA T4NG and its follow on, Treasury TIPSS legacies.

Your partners must sit on these vehicles. If they do not, the odds they can prime your target task order are low.

How to use the top 10 list to win work

You do not win by knowing the list. You win by acting on it.

• Start with agency overlap. If your past performance is VA and DHA, target Leidos, Booz Allen, and Humana, not shipbuilders.
• Map vehicles. Confirm the prime holds the contract where the work will be ordered. If the target is on SEWP, do not waste cycles with a partner that lacks SEWP.
• Check their scorecard. Read CPARS for similar contracts. Weak quality or schedule flags mean risk for you as a sub. Strong small business utilization is a positive signal. See FAR 42.1503 for CPARS use.
• Know the rules. If you are small on a small business set aside, the prime cannot be large. If you prime as small, remember FAR 52.219-14 limitations on subcontracting. If you team on full and open, look for a subcontracting plan under FAR 19.7 and FAR 52.219-9.
• Protect yourself. If you PWin the deal for a prime, lock teaming terms early and define workshare by CLIN or PWS section. Watch for OCI screens under FAR Subpart 9.5 if you also advise the government.

Checklist: qualify a prime partner in 30 minutes

This is the quick scrub we use before we spend relationship capital.

• Agency fit. Do they have at least two relevant primes with the same customer over the last three fiscal years.
• Vehicle coverage. Do they hold the specific IDIQ or GWAC where the order will drop, or a realistic on-ramp in time.
• Technical credibility. Do CPARS show Very Good or Exceptional on similar scope under FAR 42.1503.
• Small business behavior. Do they have an approved small business subcontracting plan on recent full and open awards under FAR 52.219-9, and do they hit goals.
• Security and facilities. Do they hold the clearances and facilities access your people need, or will you carry that burden.
• Past teaming. Do they pay on time, share capture insight early, and avoid last minute pricing scrambles. Ask three references.
• Story match. Does your differentiator map cleanly to Section M discriminators, not just a generic capability bullet. See The Bid/No-Bid Decision in Government Contracting.

If they miss on vehicles or agency fit, stop. If they pass, set a short call with a capture lead and confirm the next live opportunity with dates and owner.

Worked example: build a targeted top 10 for VA health IT

Say you sell VA imaging integration. You want the largest federal contractors in your lane, not shipyards.

• In USASpending, filter Department Name equals Department of Veterans Affairs. Time Period equals FY2023. NAICS equals 541512 and 541519.
• Group by Recipient Name, then sort by Sum of Obligations. Export the top 25.
• Cross check which of those hold T4NG or its successor. Mark any without the vehicle.
• From that, your practical top 10 for teaming will likely include Leidos, Booz Allen, SAIC, Accenture Federal, IBM, CGI, and a few niche VA incumbents.
• Pull three recent VA IT awards for each, read Sections L and M, and mark how they scored. Use that to shape your proof points.

Now you have a list you can actually act on. It fits your agency, your NAICS, and your vehicles. That beats a national top 10 for capture every time.

Common traps when using top contractor lists

• Confusing obligations with ceiling. A $5 billion ceiling does not mean $5 billion will flow. Orders obligate dollars. See FAR 16.504 for IDIQ ceilings and minimums.
• Ignoring task order rules. Fair opportunity under FAR 16.505 applies unless an exception is justified. Some work never hits SAM because it is ordered under an IDIQ.
• Chasing primes without the vehicle. If the work drops on OASIS or SEWP, only holders matter. Everyone else is noise.
• Assuming small business set asides will use large primes. They will not. Know your set aside rules under FAR Part 19 and 13 CFR 125.

Avoid these and you stop wasting cycles.

Final word

Use the FY2023 top 10 to orient, then build your own top list by agency and vehicle. Verify with a quick USASpending pull, then do a 30 minute partner scrub. If you decide to prime, get ruthless about Section L and Section M compliance and source selection factors under FAR 15.304.

If you are handling multiple RFPs at once, GovHub can help build compliance matrices, shred Section C, L, and M into checklists, and keep action items tight so you survive Pink, Red, and Gold reviews without chaos.