Private Equity Firms St Louis: Top Firms in 2026

Key Facts About the St. Louis PE Market

• More than 15 active private equity firms are headquartered in the St. Louis metro area, with Clayton, Missouri serving as the de facto financial hub along the Forsyth Boulevard corridor.
• Disclosed assets under management across major firms exceed $6 billion, led by Thompson Street Capital Partners at $4.5 billion across seven funds, followed by Eagle Private Capital at $1 billion-plus.
• Individual equity checks range from $4 million to $80 million per transaction depending on firm size and strategy, targeting companies with earnings before interest, taxes, depreciation, and amortization (EBITDA) between $1 million and $50 million.
• Buy-and-build via add-on acquisitions is the dominant value creation strategy: Harbour Group executed 181 add-ons out of 231 total investments; Compass Group Equity Partners completed more than 230 bolt-on acquisitions across 14 platform companies.
• Two major fund closes occurred in 2024: Compass Group Fund II reached its hard cap at $408 million, and Agellus Capital closed its debut Fund I at $400 million.
• Roughly 25 to 30 percent of identified St. Louis firms use permanent or long-duration capital structures rather than traditional 5-to-7-year fund timelines, including Broadview Group, Permanent Equity, BW Forsyth Partners, and Sage Capital.
• Missouri's pro-business regulatory climate, lower cost of living relative to coastal markets, and a regional family business succession wave provide the structural advantages driving consistent deal flow into the St. Louis market.

Private Equity Firms in St. Louis: Market Overview

The private equity landscape in St. Louis is more concentrated and more active than its Midwest profile might suggest. More than 15 firms managing over $6 billion in disclosed capital operate within the metro area, predominantly targeting lower-middle and middle-market companies with EBITDA between $2 million and $20 million. Clayton, a St. Louis suburb, anchors the ecosystem: Thompson Street Capital Partners, BW Forsyth Partners, Broadview Group, and Encore Management Group all maintain offices along or near Forsyth Boulevard.

Missouri's business environment underpins the region's appeal to fund managers and portfolio companies alike. The state's consistently low regulatory burden, targeted tax incentives for business formation and expansion, and a cost-of-living advantage over New York or San Francisco reduce overhead for both firms and their portfolio companies. Multiple general partners cite this environment explicitly as a reason for maintaining headquarters in St. Louis rather than relocating to coastal markets.

The ecosystem spans more than four decades of institutional depth. Harbour Group has been acquiring manufacturing and distribution businesses since 1976; Gardner Capital has deployed capital in affordable housing since 1992. Alongside these established names, Agellus Capital launched its debut $400 million fund in 2024 and Encore Management Group formed in 2022, demonstrating that new fund formation in the region remains active. Investment opportunities flow primarily from family business succession situations, corporate carve-outs, and intermediary-sourced proprietary deals, with most firms investing across North America while maintaining a strong Midwest and South orientation. BW Forsyth Partners is the notable exception, extending its geographic reach into Europe.

Firm Comparison at a Glance

The table below covers the 15 active St. Louis-area private equity firms with sufficient data for comparison. AUM figures reflect disclosed data only; firms without public AUM disclosures are noted. Sort order is by disclosed AUM, then alphabetical.

The five firms with disclosed AUM collectively manage over $6 billion, while the majority of St. Louis-area fund managers do not publish AUM figures publicly. Sector strength is distributed across manufacturing, business services, healthcare, and consumer services, reflecting the region's industrial heritage and its growing services economy.

Top Picks by Investment Strategy

Largest AUM: Thompson Street Capital Partners holds $4.5 billion in assets under management across seven funds and has completed more than 250 investments over two decades, making it the clear market leader by scale and track record.

Mezzanine and Subordinated Debt Leader: Eagle Private Capital brings $1 billion-plus in AUM and 148 platform investments to a strategy most St. Louis firms do not offer: flexible hybrid capital combining subordinated debt and equity for lower-middle market transactions.

Buy-and-Build Powerhouse: Compass Group Equity Partners has executed more than 230 bolt-on acquisitions across 14 platform companies using its $408 million Fund II, making it the most concentrated add-on specialist in the market.

Strongest Industrial Track Record: Harbour Group has acquired 231 businesses across 50 industries since 1976, with 181 of those being add-on acquisitions — a depth of manufacturing and distribution experience unmatched by any other St. Louis firm.

Best for Founder Legacy: Permanent Equity's 30-year committed fund structure removes the exit pressure that defines traditional buyout funds, making it the preferred choice for founders who want to preserve culture and business continuity after a sale.

Top Emerging Manager: Agellus Capital closed a $400 million debut fund in 2024 and completed eight or more transactions within its first year of operation, deploying capital at a pace that establishes it as the most active new entrant in the St. Louis market.

Unique Industrial-Operator Model: BW Forsyth Partners is backed by Barry-Wehmiller, a $3 billion-plus global manufacturing and engineering firm, giving portfolio companies access to genuine industrial operating infrastructure rather than advisory support alone.

Most Patient Capital: Sage Capital targets holds exceeding 10 years and offers buyout, minority investment, co-investment, and mezzanine structures within a single platform, providing flexibility that most competitors limit to a single structure.

Top St. Louis PE Firms in Detail

Thompson Street Capital Partners

At $4.5 billion in assets under management across seven funds and more than 250 completed investments, Thompson Street Capital Partners is the largest and most active private equity firm in St. Louis by a significant margin. The firm targets asset-light, high-margin companies with enterprise values between $50 million and $500 million, concentrating on three sectors: life sciences and healthcare, software and technology, and business and consumer services. Its in-house portfolio support group, dedicated deal origination team, and executive advisor network give management teams access to growth infrastructure beyond capital alone. Notable portfolio companies include ISTO Biologics, PKWARE, Freddy's Frozen Custard and Steakburgers, and Custom Wheel House. Management teams at founder-led companies seeking an operationally engaged partner with the firepower to accelerate add-on strategies will find TSCP's track record and deal structuring flexibility (including recapitalizations, carve-outs, and take-privates) among the most compelling propositions in the market.

Eagle Private Capital

Eagle Private Capital occupies a structural niche that most St. Louis buyout firms leave unaddressed: mezzanine financing and subordinated debt for lower-middle market businesses. With $1 billion-plus under management and 148 platform investments completed since 2010 (plus 82 exits), Eagle has built a deeper track record than most firms twice its age. The firm targets companies with EBITDA above $2 million and revenue between $10 million and $100 million-plus, investing $4 million to $15 million per transaction across business services, healthcare, manufacturing, IT, and distribution. Its capital structure flexibility makes it particularly useful for management buyout teams that need hybrid financing or owners seeking a partial liquidity event without selling a controlling stake. For sponsors and management teams assembling capital stacks, Eagle functions as a reliable junior capital provider with a genuine lower-middle market expertise base.

Compass Group Equity Partners

The defining proof point for Compass Group Equity Partners is its add-on acquisition record: more than 230 bolt-on acquisitions executed across just 14 platform companies since 2014. That ratio reflects an investment thesis centered on disciplined buy-and-build in fragmented niche markets where no single national operator has achieved scale. The firm closed Fund II at its hard cap of $408 million, a validation of limited partner confidence in that thesis. Compass targets companies with enterprise values between $20 million and $200 million and EBITDA between $2 million and $15 million, pursuing buyouts, recapitalizations, family successions, and carve-outs in niche manufacturing, value-added distribution, food ingredients, life sciences services, and veterinary management. Niche manufacturers and distributors with identified acquisition targets in adjacent markets represent the firm's clearest audience fit.

Agellus Capital

Agellus Capital raised a $400 million debut fund in 2024 and deployed it at a pace that made it one of the most active deal-makers in the St. Louis market almost immediately. The firm's investment thesis is built around essential, non-discretionary service businesses with recurring revenue characteristics: facility services, fire and life safety, IT managed services, and home and auto services. Within its first operating year, Agellus built out the Bluejack Fire Holdings platform from FirePro Tech, Chase Fire, and AAA Fire Protection Services, merged CompassMSP with BlackPoint IT Services, and acquired HighGrove Partners and Simplegrid Technology. The firm targets platform companies with EBITDA between $2 million and $20 million, investing $50 million to $80 million per platform before pursuing add-on acquisitions in the same fragmented sector. Founders of service businesses with recurring customer relationships and a fragmented competitive landscape will find Agellus the most thesis-aligned buyer in the current St. Louis market.

Harbour Group

Five decades of operating history across 231 acquired businesses spanning 50 industries gives Harbour Group an institutional depth that newer firms cannot replicate. The firm built its reputation on operationally intensive buyouts of manufacturing and value-added distribution companies, with 181 of its 231 investments being add-on acquisitions that built platform scale. Harbour targets product-oriented businesses with EBITDA between $4 million and $50 million and North America-based management teams, though portfolio companies often operate internationally. Its senior executive team (averaging 25 years of experience per individual) provides hands-on strategic, operational, and functional support rather than passive capital oversight. Manufacturing and distribution business owners who want a buyer with specific sector depth and a multi-decade track record of building companies rather than simply acquiring and exiting them will find Harbour Group's model distinctive.

BW Forsyth Partners

No other St. Louis private equity firm brings what BW Forsyth Partners brings to the table: direct backing from Barry-Wehmiller, a $3 billion-plus global manufacturing and engineering consulting company with over 12,000 team members across 28 countries. That relationship gives BW Forsyth portfolio companies genuine operational infrastructure including supply chain expertise, operational excellence capabilities, and a people-centric leadership development framework that functions at scale. Since 2009, the firm has completed 40 acquisitions across capital equipment, highly engineered components, and insurance services. BW Forsyth pursues buyouts, management buyouts, carve-outs, and distressed situations in North America and Europe, targeting companies with EBITDA between $1 million and $20 million and enterprise values up to $200 million. Portfolio companies include Machine Solutions, Afinitas, WalkerHughes Insurance, and Eberl Claims Service. Industrial business owners and management buyout teams who want operating company expertise rather than financial engineering will find this the most distinctive model in the St. Louis market.

Broadview Group

Broadview Group's permanent capital base eliminates the structural tension that defines most private equity relationships: the fund expiration date that forces a sale regardless of business conditions. The firm invests in niche manufacturing, specialty distribution, business services, and B2B food and agriculture companies requiring $15 million to $75 million in equity, targeting businesses with revenue between $25 million and $250 million and EBITDA between $3 million and $20 million. Broadview offers both majority and minority investment structures, accommodating owners who want partial liquidity while retaining a meaningful stake. Its principals bring over 50 years of combined investing and operating experience across private equity, family office structures, and corporate management. Family business owners and founders who have watched peers experience forced exits under traditional fund timelines will recognize the structural advantage Broadview's model offers.

Permanent Equity

Permanent Equity operates from Columbia, Missouri, the only major firm in this dataset based outside the St. Louis metro, and it runs one of the most unconventional fund structures in the broader private equity industry: 30-year committed capital. That structure allows the firm to invest in family-owned businesses across aerospace, consumer goods, construction, professional services, and eCommerce without imposing an exit timeline on either the business or its management team. The current portfolio of 16 active investments includes Ace Fence, Brian's Cabinets, Pacific Air Industries, Craig Frames, Blue Square Manufacturing, Chance Rides, and Rylee and Cru, a range that reflects deliberate sector diversification rather than a concentrated thesis. The firm targets businesses with free cash flow between $1 million and $25 million and net margins above 10 percent, emphasizing stewardship and cultural continuity over aggressive scaling or financial restructuring. Founders for whom the right buyer matters as much as the sale price represent Permanent Equity's clearest and most natural constituency.

Capital For Business

Capital For Business has assembled 32 portfolio companies with more than $1 billion in combined revenue and approximately 3,500 employees, a scale that reflects sustained commitment to the middle-market industrial sector rather than a selective deal-by-deal approach. The firm focuses on manufacturing and value-added industrial services, offering buyout and growth capital structures to companies seeking an experienced sponsor with sector-specific operating knowledge. Its nationwide portfolio footprint demonstrates an ability to support geographic expansion beyond the Midwest. Industrial and manufacturing business owners evaluating middle-market sponsors will find CFB's portfolio breadth and revenue scale among the more credible proof points available from a St. Louis-based fund manager.

Sage Capital

Sage Capital targets hold periods exceeding 10 years, a stance that places it among the most patient capital providers in the St. Louis market. The firm invests $5 million to $30 million in lower-middle market businesses with EBITDA between $3 million and $10 million, targeting companies with durable competitive advantages and management teams aligned on long-term growth over near-term exit maximization. What distinguishes Sage from other long-duration investors is its structural menu: the firm participates in acquisitions, minority investments, co-investments, and mezzanine capital arrangements, meaning it can fit into a wide range of ownership transition scenarios. Its investor roundtable model, combining founding members and similarly experienced new partners, gives portfolio companies access to a collective of operational perspectives rather than a single fund manager's judgment.

Investment Trends and Capital Flows

Buy-and-Build Dominance in Fragmented Markets

Add-on acquisition strategies now define value creation across most major St. Louis PE firms simultaneously. Harbour Group has completed 181 add-on acquisitions out of 231 total investments; Compass Group has executed more than 230 bolt-ons across 14 platforms; Agellus closed six or more acquisitions within its first twelve months of operation. The driver in each case is the same: fragmented service and industrial sectors where no single national operator has achieved pricing power or operational scale, creating consolidation runway for disciplined platform builders.

The Rise of Permanent and Long-Duration Capital

At least four St. Louis-based firms now explicitly reject the traditional 3-to-5 year fund exit timeline. Broadview Group and BW Forsyth Partners operate indefinite-hold vehicles; Permanent Equity uses 30-year committed funds; Sage Capital targets holds exceeding a decade. This structural shift responds directly to founder and family business owner demand for capital partners who will not force a sale within a standard fund cycle, and it represents a durable market positioning advantage for these firms as the family succession wave continues.

Essential Services Consolidation

Agellus Capital's entire $400 million debut fund is built around one thesis: essential, non-discretionary service businesses with recurring revenue that will not contract during economic downturns. Target subsectors include fire and life safety (Bluejack Fire Holdings), IT managed services (CompassMSP/BlackPoint IT), facility services (HighGrove Partners), and home and auto services. Encore Management Group pursues a parallel thesis in consumer services, targeting home health, medspa, and pet services platforms with equity checks of $45 million to $75 million per vertical.

Family Business Succession Wave

Demographic reality is generating a sustained, predictable pipeline of deal opportunities across the Midwest. Aging baby boomer business owners without internal succession plans represent the primary proprietary deal source for firms including Permanent Equity, BW Forsyth Partners, Broadview Group, WILsquare Capital, and Sage Capital, all of which explicitly position for these transitions. Relationship-driven sourcing in this category gives firms with deep regional networks a structural advantage over competitors relying on intermediary-driven processes.

Healthcare, Life Sciences, and Technology Convergence

Thompson Street Capital Partners' $4.5 billion platform spans all three of the sectors most active in the current deal environment: life sciences and healthcare, software and technology, and business services. Compass Group Equity Partners also includes life science services and veterinary management in its target sectors. Capital is flowing toward asset-light, high-margin businesses in these convergence areas, where recurring revenue characteristics and defensible niche positions combine to support the buy-and-build strategies that St. Louis fund managers prefer.

How to Evaluate PE Investors in This Space

Match fund size to company size before any other consideration. Each St. Louis firm publishes specific EBITDA and revenue thresholds; Eagle Private Capital requires EBITDA above $2 million while Harbour Group targets up to $50 million. Reaching out to a firm whose criteria do not match your company's size wastes time on both sides and signals poor preparation.

Capital structure matters as much as price. Traditional buyout equity (TSCP, Harbour Group, Compass), subordinated debt and equity hybrids (Eagle Private Capital, Sage Capital, TGP), permanent capital (Broadview Group, Permanent Equity), and industrial-operator-backed capital (BW Forsyth Partners) each carry different implications for ownership, governance, and exit expectations. Understanding which structure fits your situation before approaching a firm will sharpen every subsequent conversation.

Hold period philosophy deserves explicit verification. A firm running a traditional 7-year fund will generate exit pressure within that window regardless of business conditions; firms with permanent capital or 10-plus-year mandates will not. Track record specifics provide the most reliable signal of execution depth: TSCP's 250-plus investments, Harbour Group's 231 businesses, Eagle's 148 platforms, and Compass's 230-plus bolt-ons each represent years of repeatable process rather than isolated results.

Operational support infrastructure separates the most capable partners from capital providers. TSCP maintains a dedicated in-house portfolio support group and executive advisor network; BW Forsyth provides access to Barry-Wehmiller's industrial operations expertise; Compass embeds team members directly in portfolio company operations. Assess whether a firm's support capability is genuine by reviewing portfolio company references from current and former management teams, not just the firm's own descriptions.

Which Firm Fits Your Needs?

Founders of software, healthcare, or business services companies with enterprise values above $50 million should prioritize Thompson Street Capital Partners. TSCP's dedicated portfolio support infrastructure and 250-plus investment track record make it the most capable growth partner for asset-light companies targeting aggressive expansion through organic growth and add-on acquisitions.

Manufacturing and distribution business owners evaluating a sale or recapitalization have the deepest bench to choose from in St. Louis. Harbour Group brings five decades of sector-specific operating expertise; Capital For Business has 32 active portfolio companies with $1 billion-plus in combined revenue; Compass Group offers the most concentrated buy-and-build execution record in niche manufacturing. Industrial buyers considering a corporate carve-out or management buyout should also evaluate BW Forsyth Partners, whose Barry-Wehmiller backing provides operational depth that purely financial sponsors cannot match.

Family business owners for whom cultural continuity matters as much as transaction terms have three structurally differentiated options. Broadview Group offers permanent capital with no exit timeline and minority or majority flexibility. Permanent Equity provides 30-year committed funds and an explicit philosophy of stewardship over financial engineering. Sage Capital offers 10-plus-year holds with a co-investment and mezzanine menu that fits partial-exit scenarios. Limited partners (LPs) building diversified alternatives allocations and seeking Midwest-oriented exposure can engage TSCP or Compass Group, both of which have demonstrated consistent fund-raising velocity and hard-cap closings.

Methodology

This guide to private equity firms in St. Louis was compiled using publicly disclosed firm data, fund documentation, portfolio company records, and deal databases covering transactions through early 2026. Firms were selected based on active headquarters or primary operations in the St. Louis metro area, including Clayton, Missouri. AUM figures reflect disclosed data only; firms that do not publicly report assets under management are included based on confirmed operational activity and deal history. The analysis covers 15 active firms with sufficient public information to characterize strategy, sector focus, and investment criteria. Data was current as of the first quarter of 2026; fund sizes and portfolio compositions change with each new transaction.