Arcline Investment Acquires Hydraulics International

San Francisco-based private equity firm Arcline Investment Management has completed the acquisition of Hydraulics International Inc. (HII), a Wisconsin-based manufacturer of heavy-duty hydraulic cylinders serving construction, mining, material handling, and infrastructure markets. The deal, announced on May 13, 2025, marks Arcline's continued expansion within the specialized industrial manufacturing sector and represents the firm's commitment to building a portfolio of essential component suppliers serving critical end markets.

Financial terms of the transaction were not disclosed, though industry sources suggest the deal likely values HII in the range typical of Arcline's mid-market platform investments—generally between $100 million and $500 million in enterprise value. The acquisition continues Arcline's established pattern of targeting niche industrial businesses with strong technical capabilities, defensible market positions, and opportunities for operational improvement and strategic growth.

Hydraulics International operates at a critical intersection of several favorable long-term trends. The company manufactures custom and standard hydraulic cylinders—the muscle behind countless pieces of heavy equipment—for applications ranging from construction machinery and mining equipment to material handling systems and infrastructure projects.

The timing of this acquisition appears particularly strategic. With the Infrastructure Investment and Jobs Act continuing to drive federal spending on roads, bridges, water systems, and broadband infrastructure, demand for construction and heavy equipment—and by extension, the hydraulic components that power them—remains robust. Similarly, global mining activity has accelerated as nations compete to secure critical minerals essential for electric vehicle batteries, renewable energy infrastructure, and advanced manufacturing.

According to industry analysts, the global hydraulic cylinder market is projected to grow at a compound annual growth rate of approximately 4-5% through 2030, driven by infrastructure development in emerging markets, equipment replacement cycles in developed economies, and increasing automation in material handling and logistics.

Founded decades ago and headquartered in Wisconsin—a traditional center of American manufacturing excellence—Hydraulics International has carved out a respected position in the highly fragmented hydraulic cylinder market. The company specializes in both custom-engineered solutions for OEM customers and replacement cylinders for the aftermarket.

This dual focus provides important revenue diversification. OEM relationships offer volume and long-term visibility, while aftermarket sales typically command higher margins and demonstrate less cyclicality, as equipment operators must maintain and repair existing machinery regardless of broader economic conditions.

HII's competitive positioning rests on several key pillars:

Engineering Expertise: The company maintains in-house engineering capabilities to design custom hydraulic solutions for specific customer applications, from ultra-high-pressure cylinders for mining equipment to specialized configurations for material handling systems.

Manufacturing Quality: HII operates modern manufacturing facilities with precision machining capabilities, advanced metallurgy expertise, and rigorous quality control processes—essential attributes when producing components that must perform reliably in demanding environments where failure can result in costly downtime or safety incidents.

Customer Relationships: The company has developed long-standing relationships with equipment manufacturers and end users, built on consistent delivery performance, technical support, and responsive service—factors that create meaningful switching costs in a market where reliability often trumps price.

Arcline Investment Management, founded in 2018, has quickly established itself as a sophisticated operator in the lower-middle and middle-market private equity landscape. The firm typically targets industrial, infrastructure, and business services companies with enterprise values between $100 million and $1 billion, focusing on businesses where operational improvement and strategic repositioning can drive value creation beyond multiple expansion.

The HII acquisition fits cleanly within Arcline's established investment thesis, which emphasizes several common themes:

While Arcline has not publicly detailed its specific plans for HII, the firm's track record with similar platform investments suggests a likely value creation strategy:

Operational Excellence: Implementing lean manufacturing principles, optimizing production scheduling, improving supply chain management, and enhancing quality systems to reduce defects and improve delivery performance.

Commercial Initiatives: Expanding the sales organization, developing new distribution channels, enhancing aftermarket capabilities, and potentially establishing service centers closer to key customer concentrations.

Product Development: Investing in engineering resources to develop next-generation products, expand the product portfolio to adjacent applications, and enhance customization capabilities to capture higher-value projects.

Strategic M&A: Using HII as a platform for consolidation within the fragmented hydraulics market, potentially acquiring complementary manufacturers, regional players, or companies with specialized capabilities or customer relationships.

The HII acquisition comes against a complex backdrop for middle-market M&A activity. After two years of elevated interest rates dampened deal activity and created valuation gaps between buyers and sellers, the market has shown signs of normalization in recent quarters.

According to PitchBook data, middle-market private equity deal volume in the first quarter of 2025 showed modest improvement compared to the prior year, though transaction counts remain below the frenzied levels of 2021-2022. However, activity in the industrial sector has proven relatively resilient, supported by several factors:

Infrastructure spending continues to drive demand visibility for industrial businesses serving construction and infrastructure end markets, making these assets more attractive to financial buyers seeking revenue stability.

Reshoring and nearshoring trends have increased interest in North American manufacturing assets as companies seek to reduce supply chain risk and take advantage of domestic production incentives.

The energy transition is creating new demand for industrial equipment and components as manufacturers retool for electric vehicles, battery production, and renewable energy infrastructure.

While specific multiples for the HII transaction were not disclosed, middle-market industrial deals have generally been transacting at 8-12x EBITDA in recent quarters, depending on growth rates, margin profiles, and market positioning. Premium valuations in the range of 10-14x EBITDA have been reserved for businesses with strong aftermarket exposure, diversified end markets, proprietary technology, or clear consolidation opportunities—characteristics that HII appears to possess.

The relative stability of industrial valuations compared to more cyclical sectors reflects buyer confidence in long-term demand drivers and the essential nature of many industrial products and services.

The hydraulics industry exemplifies the type of fragmented industrial market where private equity consolidation strategies can create substantial value. The sector includes hundreds of small and mid-sized manufacturers, many of them family-owned businesses approaching generational transitions.

For Arcline, HII could serve as an ideal platform for a buy-and-build strategy. The company's established brand, manufacturing capabilities, customer relationships, and geographic footprint provide a foundation onto which additional acquisitions can be integrated. Common synergies in hydraulics consolidation include:

Manufacturing footprint optimization, consolidating production to the most efficient facilities and eliminating redundant capacity.

Purchasing leverage from increased scale, negotiating better terms with steel suppliers, seal manufacturers, and other key input providers.

Cross-selling opportunities, introducing acquired companies' products to HII's existing customer base and vice versa.

Administrative efficiencies, consolidating back-office functions, IT systems, and management infrastructure.

Several factors suggest a positive outlook for HII under Arcline's ownership:

End-market tailwinds: Infrastructure spending, mining activity, and equipment replacement cycles should support steady demand for hydraulic cylinders over the coming years.

Operational upside: Arcline's operational capabilities and resources should enable margin expansion and efficiency improvements that may have been difficult for HII to achieve as an independent company.

Growth capital: Access to Arcline's capital and M&A expertise positions HII to pursue growth initiatives—both organic and inorganic—that were previously constrained.

Strategic optionality: Whether Arcline ultimately pursues an IPO, strategic sale, or secondary buyout as an exit, the firm's track record suggests it will position HII for a successful outcome.

For the broader market, this transaction signals continued appetite for quality industrial assets despite macroeconomic uncertainty. Private equity firms with operational expertise, patient capital, and sector knowledge continue to see value in businesses serving essential functions within the industrial economy.

The hydraulics industry's fragmentation, the essential nature of its products, and favorable long-term demand drivers make it an attractive arena for consolidation. The HII acquisition may well be the opening move in a multi-year strategy to build a leading hydraulics platform.

As infrastructure investment continues, equipment fleets age, and industrial activity remains resilient, companies like Hydraulics International that provide mission-critical components will remain valuable strategic assets. Under Arcline's ownership, HII appears well-positioned to capitalize on these opportunities and strengthen its position in the market.

Type: Acquisition | Firm Size: Mid-Market | Industry: Industrial Manufacturing, Engineered Components | Strategy: Platform, Buy-and-Build | Deal Size: Mid-Market ($100M-$500M estimated)