Riverside Plastics
Riverside Plastics is a family-owned custom thermoplastic injection molder founded in 1970 in Bonaparte, Iowa, serving OEM manufacturers across electronics, appliances, agriculture, and industrial sectors with in-house tooling, molding, and post-molding services.
- Company typePrivate
- Founded1970
- HeadquartersBonaparte, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Riverside Plastics does
Riverside Plastics, Inc. (RPI) is a privately held, family-owned custom injection molder of thermoplastic resins, founded in 1970 and headquartered in a 70,000-square-foot facility in Bonaparte, Iowa. The company operates injection molding presses ranging from 30 tons to 730 tons, enabling production of parts from a fraction of an ounce to several pounds, and processes a broad resin portfolio including ABS, Nylon, PC, PE, PP, PPS, TPE, and TPU. RPI runs an integrated 11,000-square-foot in-house toolroom with more than 40 years of operating history, supported by a concrete-lined die vault and a preventive mold maintenance program.
The company's offering is organized around five core services: Plastic Injection Molding, Engineering/Design, Tool & Die, Quality Control (ISO 9001:2015 registered), and Post-Molding Machining (light assembly, close-tolerance production machining, parts kitting, and special packaging). It sells exclusively through direct B2B relationships to OEM manufacturers in electronics, appliances, agriculture, pumps, and general industrial manufacturing, with no third-party distribution or digital marketing channels of note. Pricing is quote-based on part complexity, resin, volume, and tooling, structured as project or multi-year manufacturing agreements. RPI employs 51–100 people and is led by COO Allen Gunn with a small, tenured management team; long-term employees (40+ years) have been a defining feature of the workforce, though several original employees have retired since 2021.
Riverside Plastics firmographics
Firmographics- Name
- Riverside Plastics
- Legal name
- Riverside Plastics, Inc.
- Website
- https://rpimolding.com
- Company type
- Private
- Founded year
- 1970
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Riverside Plastics is a family-owned custom thermoplastic injection molder founded in 1970 in Bonaparte, Iowa, serving OEM manufacturers across electronics, appliances, agriculture, and industrial sectors with in-house tooling, molding, and post-molding services.
- Ownership category
- akta.pro rank
Riverside Plastics industry classification
Industry- Product category
- Custom Plastic Injection Molding
- NAICS
- Plastics Product Manufacturing (3261), All Other Plastics Product Manufacturing (326199)
- SIC
- Plastics Products, Nec (3089)
- akta.pro primary industry
- Injection-Molded Plastics Manufacturing (IMANAOAG)
- akta.pro secondary industry
- Consumer Products Injection Molding (Housewares, Toys, Personal Care) (IMANAFAE)
Keywords
Where Riverside Plastics is headquartered
LocationHeadquarters
- HQ city
- Bonaparte
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Riverside Plastics business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D
Revenue model
- Custom Injection Molding Services: Custom thermoplastic injection molding services where the company designs and manufactures injection-molded plastic parts to customer specifications, moving projects from concept to launch. Revenue is generated through manufacturing contracts for custom parts production, likely structured as project-based or long-term manufacturing agreements.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom injection molding projects are quoted individually based on part complexity, resin type, volume, and tooling requirements. |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Riverside Plastics product offering
Product offeringCore offering
Riverside Plastics is a custom injection molder of thermoplastic resins, producing custom injection-molded plastic parts for OEM manufacturers. The company operates injection molding presses from 30 to 730 tons to produce parts weighing from a fraction of an ounce to several pounds, with supporting services including in-house engineering/design, tool & die making, ISO 9001:2015 quality control, and post-molding machining/assembly operations.
Product overview
Riverside Plastics is a custom injection molder of thermoplastic resins offering a unified manufacturing service portfolio. The core offering is Plastic Injection Molding, supported by integrated Engineering/Design services for part optimization, Tool & Die services for in-house mold-making, Quality Control for ISO 9001:2015-compliant inspection, and Post-Molding Machining for additional operations like assembly and machining. Customer Service rounds out the offering to ensure consistent quality, delivery, and performance. The company processes various thermoplastic resins including ABS, Nylon, Polycarbonate, Polypropylene, and others.
Differentiator
Problem solved
Functional benefit
Products and services
- Plastic Injection Molding
Quantifiable outcome
- Parts weighing from a fraction of an ounce to several pounds
- +1 more outcomes
Companies that use Riverside Plastics
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles2 records
Riverside Plastics technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature2 records
Riverside Plastics partnerships and signals
Strategic signalScale indicators5 records
Recent moves6 records
Expansion highlights3 records
Riverside Plastics competitors and assessment
Company assessmentBroad incumbents
- Berry Global: Large diversified plastics manufacturer with significant injection molding operations serving packaging and industrial customers; serves as a broader incumbent benchmark for scale, capabilities, and competitive pressure on smaller custom molders like Riverside.
- AptarGroup: Large global plastics manufacturer serving pharmaceutical, beauty, home, and food markets with injection-molded components; provides a broader incumbent benchmark for plastics manufacturing scale and the competitive context for smaller custom molders.
Direct peers
- Mack Group: Multi-generation family-owned custom plastics manufacturer combining injection molding with tooling, assembly, and engineering support; parallels Riverside's family-ownership narrative and integrated service stack.
- Plastek Industries: Family-owned custom injection molder serving consumer, industrial, and packaging customers; comparable to Riverside in private ownership structure, custom molding focus, and integrated tool/die capabilities.
- Evco Plastics: Midwest US-based custom injection molder with a similar mix of industrial, consumer, and OEM customers; comparable in scale, geography, and integrated service model, making it one of the closest operating comparables to Riverside Plastics.
- Tessy Plastics: Multi-facility custom thermoplastic injection molder with in-house tooling, post-molding operations, and quality systems; comparable to Riverside on core service scope (molding + tooling + value-added) and customer mix.
- Tri-Mack Plastics: Custom injection molder focused on engineering-grade thermoplastics for aerospace, medical, and industrial OEMs; comparable to Riverside's engineering-resin capabilities and customization-heavy business model.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Riverside Plastics social profiles
Digital presenceRiverside Plastics compliance and trust
Trust signalCompliance1 record
Riverside Plastics financial estimates
Financial estimateRevenue estimate
Valuation estimate
Riverside Plastics leadership team
Management profileNumber of profiles
Profiles8 records
Riverside Plastics funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Riverside Plastics M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Riverside Plastics
What does Riverside Plastics do?
Riverside Plastics is a custom injection molder of thermoplastic resins, producing custom injection-molded plastic parts for OEM manufacturers. The company operates injection molding presses from 30 to 730 tons to produce parts weighing from a fraction of an ounce to several pounds, with supporting services including in-house engineering/design, tool & die making, ISO 9001:2015 quality control, and post-molding machining/assembly operations.
Is Riverside Plastics a public or private company?
Riverside Plastics is a private company. It is classified as family owned and is currently operating.
When was Riverside Plastics founded?
Riverside Plastics was founded in 1970. It employs 51 to 100 people.
Where is Riverside Plastics based?
Riverside Plastics is headquartered in Bonaparte, United States, in the North America region.
How does Riverside Plastics make money?
One revenue line is on record: custom Injection Molding Services.
Who are Riverside Plastics's main competitors?
Broad incumbents on record are Berry Global and AptarGroup. Direct peers are Mack Group, Plastek Industries, Evco Plastics, Tessy Plastics and Tri-Mack Plastics.
Does Riverside Plastics have an API?
No public API is recorded for Riverside Plastics.
What industry is Riverside Plastics in?
Riverside Plastics's product category is Custom Plastic Injection Molding. Its primary akta.pro industry code is IMANAOAG, Injection-Molded Plastics Manufacturing, with a secondary code of IMANAFAE, Consumer Products Injection Molding (Housewares, Toys, Personal Care). Its NAICS code is 3261 and its SIC code is 3089.