Aerospace and vehicle manufacturing 401(k) plans

Plan size drives fees more than industry does: bigger plans pay less per head. See median fees by plan size before reading an industry gap as an industry effect.

All 934 aerospace and vehicle manufacturing plans on file are listed below by size, and every one of them is searchable from the home page.

The table above is the top of the list. These 5 pages hold all 934 plans on file in aerospace and vehicle manufacturing, split by how many people are in them, each ranked by active participants.

• 100 to 499 participants · 460 plans

  Pages12

• 500 to 999 participants · 189 plans
• 1,000 to 4,999 participants · 212 plans
• 5,000 or more participants · 73 plans

For these 6 employers we also read the SEC Form 11-K and extracted the match terms, matched to this industry by the plan’s EIN.

• Eaton Corporation plc

  50% of the first 6% of pay

• Howmet Aerospace Inc.

  Matches contributions up to 6% of pay at a rate set each year; the rate is not disclosed

• Huntington Ingalls Industries, Inc.

  100% (dollar-for-dollar) of the first 2% of pay, then 50% of the next 2% of pay, then 25% of the next 4% of pay

• PACCAR Inc

  100% (dollar-for-dollar) of the first 5% of pay

• The Boeing Company

  Match formula not disclosed in the filing

• Westinghouse Air Brake Technologies Corporation

  100% (dollar-for-dollar) of the first 3% of pay

Transportation equipment manufacturing (codes 336100 to 336999): cars, aerospace and shipbuilding. Sponsors here include General Motors, RTX and Huntington Ingalls.

The code is the IRS principal business activity code the sponsor itself puts on Form 5500, line 2d. Medians count only plans whose Schedule H shows a positive plan-paid administrative expense (899 of 934 plans here). Plan-paid expenses exclude fund expense ratios and employer-paid bills, so every figure is a floor, not the all-in cost. Latest filing in this group received by the DOL July 16, 2026; source dataset last refreshed July 28, 2026. Full methodology