NAICS 311221 Quarterly Industry Report
Wet Corn Milling
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 311221Sector: 31Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 311221 provides valuation-focused intelligence for professionals assessing wet corn milling and corn refining businesses. Additional data is drawn from Bureau of Labor Statistics[6], U.S. Census Bureau[7].. Data is sourced from USDA ERS[5] corn use data, USDA NASS[8] grain stocks reports, and SBA size standards[9] to support business appraisals, acquisition due diligence, lending decisions, and investment analysis for corn refining enterprises.
Industry Definition & Overview
Wet Corn Milling (NAICS 311221) encompasses establishments primarily engaged in wet milling corn and other vegetables, a refining process that steeps corn kernels in a sulfurous acid solution to separate the starch, protein, fiber, and oil components for production of corn starch, corn sweeteners (high-fructose corn syrup and glucose), corn oil, and animal feed co-products. The U.S. Census Bureau[4] classifies wet corn milling separately from dry flour milling (NAICS 311211) and ethanol production, recognizing the distinct chemical separation process and capital-intensive refining infrastructure.
The U.S. wet corn milling industry processes billions of bushels of corn annually into ingredients serving food and beverage manufacturing, paper and textile industries, and pharmaceutical applications. The USDA Economic Research Service[5] tracks corn use across food, feed, fuel, and industrial applications, with wet milling accounting for a substantial share of industrial corn usage. Industry structure is highly concentrated, with a small number of large refining companies operating multiple facilities primarily located in the Corn Belt states of Iowa, Illinois, Indiana, and surrounding regions.
Business valuations for wet corn milling operations focus on refining capacity measured in bushels per day, facility age and modernization status, product mix flexibility across starch, sweetener, and co-product revenue streams, corn procurement logistics, and customer contract portfolios with food manufacturers and industrial buyers. Appraisers evaluate starch yield per bushel, energy cost per unit, co-product revenue recovery, and the long-term contractual relationships that define revenue stability in this capital-intensive processing industry.
What's Included in This Industry
- Sector-specific valuation multiples and financial benchmarks for wet corn milling and corn refining operations
- Revenue and profitability analysis across corn starch, high-fructose corn syrup, corn oil, gluten feed, and gluten meal segments
- SBA size standard classification and lending threshold data for NAICS 311221
- Comparable transaction data from recent corn refining facility acquisitions, capacity expansions, and company-level transactions
- Market analysis covering corn sweetener demand, starch industrial applications, corn oil markets, and co-product feed pricing
- Workforce and labor cost benchmarking for plant managers, process engineers, laboratory technicians, and maintenance mechanics
- Industry risk assessment including corn price volatility, sweetener demand shifts, energy costs, and environmental compliance expenses
- Regulatory compliance overview covering FDA food ingredient standards, EPA wastewater discharge permits, and air quality regulations
- Capital expenditure profiles for steeping tanks, centrifuges, evaporators, dryers, and wastewater treatment plant infrastructure
- Production metrics including bushels per day capacity, starch yield per bushel, energy per unit, and co-product recovery rates
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Food Manufacturing | 311 |
| Industry Group | Grain and Oilseed Milling | 3112 |
| NAICS Industry | Starch and Vegetable Fats and Oils Manufacturing | 31122 |
| National Industry | Wet Corn Milling and Starch Manufacturing | 311221 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 311211 | Flour Milling | Flour milling operations processing corn through dry milling methods that complement wet milling in serving overlapping food manufacturing ingredient markets |
| 311351 | Chocolate and Confectionery Manufacturing from Cacao Beans | Chocolate and confectionery manufacturing operations purchasing corn sweeteners and corn starch from wet mills as primary confectionery ingredients |
| 312111 | Soft Drink Manufacturing | Soft drink manufacturing operations that consume high-fructose corn syrup as their primary sweetener ingredient from wet corn milling producers |
| 311119 | Other Animal Food Manufacturing | Animal food manufacturing operations purchasing corn gluten feed, corn gluten meal, and other wet milling co-products for livestock feed ration ingredients |
| 424510 | Grain and Field Bean Merchant Wholesalers | Grain merchant wholesalers and country elevators procuring and delivering corn from farmers and grain terminals to wet milling processing facilities |
| 322110 | Pulp Mills | Pulp mill and paper manufacturing operations purchasing corn starch from wet millers for paper coating, adhesive, and sizing applications |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Iowa | 22.7% | 10 |
| 2 | Illinois | 15.9% | 7 |
| 3 | Minnesota | 11.4% | 5 |
| 4 | Indiana | 9.1% | 4 |
| 5 | Nebraska | 6.8% | 3 |
| 6 | Washington | 6.8% | 3 |
| 7 | California | 6.8% | 3 |
| 8 | Texas | 6.8% | 3 |
| 9 | North Dakota | 6.8% | 3 |
| 10 | North Carolina | 6.8% | 3 |
% Of Establishments
0%
23%
Source: County Business Patterns, U.S. Census Bureau[3]
Frequently Asked Questions
Common questions about this industry.
What is the NAICS code for wet corn milling?
Wet Corn Milling is classified under NAICS code 311221, covering establishments wet milling corn and other vegetables to produce starch, sweeteners, and co-products per the U.S. Census Bureau[4] industry classification system.
What is the SBA size standard for wet corn milling?
The SBA[10] sets the size standard for NAICS 311221 at 1,250 employees, qualifying eligible corn refining operations for small business government contracting preferences and SBA lending programs.
What products does wet corn milling produce?
Products include corn starch, high-fructose corn syrup, glucose syrup, corn oil, corn gluten feed, corn gluten meal, and modified starches for food, paper, textile, and pharmaceutical applications per USDA ERS[5] corn use data.
How are wet corn milling operations valued?
Valuations focus on refining capacity in bushels per day, facility condition, product mix flexibility, corn procurement logistics, customer contracts, and co-product recovery rates per industry processing benchmarks.
How concentrated is the wet corn milling industry?
The industry is highly concentrated, with a small number of large companies operating the majority of domestic refining capacity in Corn Belt states per USDA ERS[5] corn processing and use data.
What risks affect wet corn milling operations?
Major risks include corn price volatility, high-fructose corn syrup demand shifts as consumers move toward natural sweeteners, energy costs for continuous processing, wastewater treatment expenses, and capital equipment replacement requirements.
How does corn pricing affect wet milling profitability?
Corn represents the largest input cost, with pricing tracked by the USDA NASS[8] and commodity exchanges. Millers manage exposure through forward contracts, hedging strategies, and pass-through pricing in long-term customer agreements.
What environmental regulations apply to wet corn mills?
Wet corn mills must comply with EPA[14] wastewater discharge permits, air quality standards for particulate and volatile organic compound emissions, solid waste management requirements, and energy-intensive process emissions reporting.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Census Bureau census.gov
- [5]USDA Economic Research Service ers.usda.gov
- [6]Bureau of Labor Statistics bls.gov
- [7]U.S. Census Bureau census.gov
- [8]USDA NASS nass.usda.gov
- [9]SBA size standards sba.gov
- [10]SBA sba.gov
- [11]SBA-backed lending sba.gov
- [12]SBA 7(a) loans sba.gov
- [13]504 loans sba.gov
- [14]EPA epa.gov
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