NAICS 325991 Quarterly Industry Report
Custom Compounding of Purchased Resins
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 325991Sector: 32Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 325991 delivers business owners, acquirers, and financial advisors data-driven valuation insights for the custom resin compounding sector, drawing on data from the U.S. Census Bureau[5] and EPA[8] plastics recycling statistics. Additional data is drawn from Bureau of Labor Statistics[9].. The report aggregates transaction multiples, financial benchmarks, and market trends specific to NAICS 325991 establishments, supporting buy-sell agreements, succession planning, SBA-financed acquisitions, and litigation support engagements.
Industry Snapshot
Key metrics for the custom compounding of purchased resins industry.
Industry Definition & Overview
Custom Compounding of Purchased Resins (NAICS 325991) encompasses establishments primarily engaged in custom mixing and blending plastics resins made elsewhere, or reformulating plastics resins from recycled plastics products. Operations include adding colorants, fillers, reinforcements, stabilizers, and performance additives to base resins purchased from primary resin manufacturers to create custom-formulated compounds meeting specific customer application requirements. According to the U.S. Census Bureau[5], approximately 37 companies operate within this classification, employing roughly 18,800 workers with annual revenue exceeding $11.3 billion in compounding facilities that convert commodity and engineering resins into value-added compounds consumed by plastics processors across automotive, packaging, construction, and consumer products manufacturing sectors.
Product categories include color concentrates and masterbatches, glass-fiber-reinforced compounds, mineral-filled formulations, recycled resin blends incorporating post-consumer and post-industrial plastics, and specialty compounds with flame retardant, UV-stabilized, or antimicrobial properties. The Bureau of Labor Statistics[6] identifies production roles including twin-screw extruder operators managing compounding line parameters, color matching technicians developing custom color formulations, quality control analysts performing melt flow, tensile, and impact testing, process engineers ensuring compound consistency, and logistics coordinators managing just-in-time delivery to plastics processors.
Per the SBA Office of Advocacy[7], the industry is concentrated among specialized compounders that serve as intermediaries between primary resin producers and plastics processors. Growing emphasis on recycled content in plastics products has created new market opportunities for compounders with expertise in post-consumer resin processing, contamination management, and recycled material formulation to meet brand owner sustainability commitments and emerging regulatory requirements.
What's Included in This Industry
- Valuation multiples benchmarked to custom resin compounding operations
- Revenue and EBITDA trends for domestic plastics compounding facilities
- SBA lending data and financing terms for NAICS 325991 businesses
- Comparable transaction data from recent plastics compounder acquisitions
- Industry risk factors including resin pricing, customer concentration, and recycling demand
- Workforce composition and labor cost benchmarks for compounding operations
- Regional market analysis covering major plastics compounding clusters
- Capital expenditure benchmarks for twin-screw extruders and blending equipment
- Growth projections tied to recycled content demand and specialty compound markets
- Owner compensation and discretionary earnings benchmarks
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Chemical Manufacturing | 325 |
| Industry Group | Other Chemical Product and Preparation Manufacturing | 3259 |
| NAICS Industry | All Other Chemical Product and Preparation Manufacturing | 32599 |
| National Industry | Custom Compounding of Purchased Resins | 325991 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 325211 | Plastics Material and Resin Manufacturing | Plastics material and resin manufacturers producing commodity and engineering base resins purchased by compounders for custom formulation and additive blending operations |
| 326199 | All Other Plastics Product Manufacturing | All other plastics product manufacturers consuming custom-compounded resins as primary raw material inputs for injection molding, extrusion, and thermoforming production |
| 326111 | Plastics Bag and Pouch Manufacturing | Plastics bag and pouch manufacturers consuming custom-compounded polyethylene and polypropylene resins with specified color and additive package requirements |
| 326112 | Plastics Packaging Film and Sheet (including Laminated) Manufacturing | Plastics packaging film manufacturers consuming compounded resins with specific optical, barrier, and processing characteristics for flexible packaging film production |
| 325199 | All Other Basic Organic Chemical Manufacturing | Basic organic chemical producers manufacturing colorants, UV stabilizers, flame retardants, and performance additives blended into resin compounds during compounding |
| 325510 | Paint and Coating Manufacturing | Paint and coating manufacturers sharing color matching technology, pigment dispersion expertise, and additive chemistry knowledge with plastics compounding operations |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Ohio | 9.2% | 37 |
| 2 | Texas | 8.7% | 35 |
| 3 | Pennsylvania | 7.9% | 32 |
| 4 | Indiana | 7.2% | 29 |
| 5 | California | 6.2% | 25 |
| 6 | Illinois | 5.2% | 21 |
| 7 | North Carolina | 5.0% | 20 |
| 8 | Georgia | 4.7% | 19 |
| 9 | Michigan | 4.5% | 18 |
| 10 | Massachusetts | 4.0% | 16 |
% Of Establishments
0%
9%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
8
Total SBA Loans
$36.0M
Total Loan Volume
$4.5M
Average Loan Size
25 yrs
Average Loan Term
9.25%
Average Interest Rate
768
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: Custom resin compounders evaluating SBA financing benefit from favorable qualification under the SBA size standards[10] for NAICS 325991, which set the threshold at 500 employees for small business classification. The SBA 7(a) loan program[11] supports compounding business acquisitions and working capital financing for resin inventory purchases, while the CDC/504 loan program[12] provides long-term fixed-rate financing for twin-screw extruders, blending systems, pelletizing equipment, and warehouse expansions. Lenders evaluate customer diversification, resin supplier relationships, and quality certification status when structuring compounding business loans.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | First-Citizens Bank & Trust Company | 8 | $36.0M | $4.5M |
Frequently Asked Questions
Common questions about this industry.
What is the typical valuation multiple for a plastics compounder?
Custom resin compounders typically trade at 5x to 8x EBITDA, with specialty compounders serving demanding applications commanding premium multiples. Per U.S. Census Bureau[5] data, valuations reflect technical formulation capabilities, customer diversification, and the ability to process recycled materials.
What SBA loan options are available for compounding businesses?
The SBA[10] sets the small business threshold at 500 employees for NAICS 325991. Most independent compounders qualify for SBA financing, with 7(a) loans supporting acquisitions and working capital, and 504 loans financing extruder and facility investments.
How is recycled content demand affecting compounders?
Brand owner sustainability commitments and state-level recycled content mandates are driving demand for compounders with post-consumer resin processing capabilities. Per the EPA[8], recycled plastics processing expertise has become a competitive differentiator as companies seek partners to help meet recycled content targets.
What raw materials drive compounding costs?
Base resin purchases represent 70% to 85% of revenue, making resin pricing the primary driver of compounding business economics. Per the U.S. Energy Information Administration[13], petrochemical-linked resin pricing creates margin volatility managed through formula-based pricing and pass-through mechanisms.
What quality certifications matter for compounders?
Automotive customers require IATF 16949 quality management certification, while medical and food-contact applications demand FDA-compliant formulations. Per the FDA[14], food-contact compound compliance requires documented formulation review and testing to meet 21 CFR indirect food additive regulations.
What technology trends affect plastics compounding?
Co-rotating twin-screw extruder technology with gravimetric feeding, underwater pelletizing systems, and advanced color measurement instruments improve compound quality and consistency. Per the U.S. Census Bureau[5], investment in process control technology helps compounders meet tightening quality specifications from automotive and medical customers.
What workforce challenges do compounders face?
The Bureau of Labor Statistics[6] reports that extruder operators, color technicians, and plastics processing engineers are in demand across the compounding sector. Competition from primary resin producers and plastics product manufacturers for trained extrusion operators creates ongoing recruitment challenges.
How does automotive lightweighting drive compounding demand?
Automotive metal-to-plastic conversion programs consume growing volumes of glass-fiber-reinforced, mineral-filled, and specialty engineered compounds. Per the Bureau of Transportation Statistics[15], vehicle fuel efficiency standards and electric vehicle weight reduction goals support increasing plastics content per vehicle.
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. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Bureau of Labor Statistics bls.gov
- [7]SBA Office of Advocacy advocacy.sba.gov
- [8]EPA epa.gov
- [9]Bureau of Labor Statistics bls.gov
- [10]SBA size standards sba.gov
- [11]SBA 7(a) loan program sba.gov
- [12]CDC/504 loan program sba.gov
- [13]U.S. Energy Information Administration eia.gov
- [14]FDA fda.gov
- [15]Bureau of Transportation Statistics bts.gov
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