POWER SOLUTIONS INTERNATIONAL, INC.
Power Solutions International, Inc. (NASDAQ: PSIX) designs, engineers, manufactures, markets and sells advanced, emission-certified engines and power systems powered by clean alternative fuels including natural gas, propane, and biofuels, as well as gasoline and diesel options. The company website is… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What POWER SOLUTIONS INTERNATIONAL, INC. does
In the company’s own words
Power Solutions International, Inc. (NASDAQ: PSIX) designs, engineers, manufactures, markets and sells advanced, emission-certified engines and power systems powered by clean alternative fuels including natural gas, propane, and biofuels, as well as gasoline and diesel options. The company website is http://www.psiengines.com.
The company operates as a single reportable segment serving three primary end markets: power systems, industrial, and transportation. Within power systems, PSI supplies electric power generation equipment including standby and prime power gensets, demand response systems, microgrids, combined heat and power systems, and oil and gas applications. The industrial segment encompasses material handling equipment such as forklifts, agricultural and arbor care equipment, irrigation pumps, construction machinery, compressors, and utility vehicles. The transportation segment includes Class 2-7 vocational trucks and vans, school buses, transit buses, and terminal tractors.
PSI manufactures and assembles products at facilities in suburban Chicago, Illinois, and in Darien and Beloit, Wisconsin. The company employs approximately 1,000 full-time employees and serves global original equipment manufacturers and end-user customers across diverse applications. Approximately 74 percent of engines sold in 2025 run on propane or natural gas, reflecting the company's strategic focus on alternative fuel solutions.
The company's comprehensive power systems integrate internally designed and manufactured engine blocks with associated components including fuel systems, cooling systems, electronic controls, air intake systems, exhaust systems, and custom enclosures. PSI maintains significant research and development capabilities with net R&D expenditures of 18.2 million in 2025, focusing on new product development, emissions compliance, and performance improvements.
A strategic collaboration with Weichai Power Co., Ltd., which beneficially owns 46.0 percent of outstanding common stock, provides PSI access to advanced research and development, manufacturing capabilities, procurement advantages, and distribution channels in emerging markets. The company also maintains distribution agreements with international partners, including Société Internationale des Moteurs Baudouin for European, Middle Eastern, and African markets. PSI's largest customer represented 20 percent of consolidated net sales in 2025, with the customer base changing periodically based on market conditions and customer strategies.
Company details
- Sector
- Industrials
- Industry
- Industrial Machinery
- Headquarters
- WOOD DALE, IL
- Fiscal year end
- December
- CIK
- 1137091
- SIC
- 3510
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns POWER SOLUTIONS INTERNATIONAL, INC. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · POWER SOLUTIONS INTERNATIONAL, INC.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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