Private Equity Law Firms Chicago: Top Firms in 2026

Key Facts

• Chicago hosts 25 law firms recognized in legal rankings for Corporate/M&A and Private Equity in Illinois, making it the largest Midwestern hub for PE legal work.
• Four firms hold Band 1 status in independent legal rankings, each with 21 consecutive years of recognition: Kirkland & Ellis, Latham & Watkins, Sidley Austin, and Skadden.
• Kirkland & Ellis, founded in Chicago in 1909, maintains 800-plus attorneys in the city and advised on the $8.4 billion Clearwater Analytics take-private in 2025.
• The market is expanding: Kilpatrick Townsend & Stockton entered legal rankings for the first time in 2025, and Greenberg Traurig added two PE shareholders to its Chicago office in December 2025.
• Honigman's PE group, with over 60 attorneys, advised on more than $42 billion in deal value during 2024 and 2025, ranking in the top 10 nationally for PE transaction volume.
• Independent sponsor activity is a growing segment, with at least six ranked Chicago firms maintaining dedicated fundless and independent sponsor practices.

Chicago's PE Legal Market: Scale, Depth, and Midwestern Reach

Chicago ranks among the top three U.S. markets for private equity law firms, behind only New York. The city hosts 25 top-ranked PE law practices, spanning global Big Law giants to Chicago-native boutiques. Active deal flow covers healthcare, technology, industrials, and financial services. The Midwest's concentration of manufacturing, healthcare services, and business services companies generates steady middle-market buyout volume. Chicago's financial infrastructure also supports large-cap and take-private transactions that rival coastal deal sizes.

Two structural realities define the Chicago PE legal market. Most ranked practices are Chicago offices of global firms headquartered elsewhere, including Latham & Watkins (Los Angeles), Skadden (New York), and Paul Hastings (Los Angeles). A core group of Chicago-native firms, including Kirkland & Ellis, Sidley Austin, Mayer Brown, Katten, and McDermott Will & Emery, anchors the market with deep local roots and nationally recognized PE benches.

The 2025 legal rankings show an expanding market. New entrants Kilpatrick Townsend & Stockton and Croke Fairchild reflect growing demand for PE counsel. Independent sponsor activity and middle-market deal flow are accelerating across Illinois and surrounding states. Elevated interest rates and tariff policy uncertainty have extended PE holding periods, as Katten's Christopher Atkinson noted in December 2025. These conditions have created more complex recapitalization mandates and increased the premium on experienced deal counsel.

Private Equity Law Firms in Chicago: Firm Comparison

The firms below represent the full Band 1 through Band 3 landscape from legal rankings, plus key middle-market and specialist practices. No AUM column is included, as law firms do not manage assets under management. Firms are ordered by band ranking, then alphabetically within each band.

Band 1 status reflects consistent excellence across deal quality, client diversity, and transactional complexity. Kirkland and Latham dominate large-cap mandates, while Sidley offers the deepest insurance and healthcare-adjacent PE practice in the market. Among Band 2 and Band 3 players, Katten and McDermott stand out as Chicago-native practices with sector depth that rivals their larger peers.

Top Picks by Investment Strategy

Largest PE Transaction Volume: Kirkland & Ellis, whose 2025 mandate list includes the $8.4 billion Clearwater Analytics take-private for Permira and Warburg Pincus and the $960 million TransDigm acquisition of Arlington Capital-backed Stellant Systems.

Cross-Border PE Leader: Latham & Watkins, which handled Clearwater Analytics alongside Kirkland and also advised on the $6.2 billion CPP Investments/GIP acquisition of ALLETE, demonstrating consistent mega-cap cross-border volume.

Healthcare and Life Sciences Specialist: McDermott Will & Emery, ranked Band 2 for 21 consecutive years, with sector depth spanning healthcare services, life sciences, food and beverage, and technology.

Independent Sponsor Practice Leader: Katten, the only top-ranked Chicago firm with an explicit independent sponsor practice, a dedicated mezzanine fund representation capability, and a named family office practice led by partner Kimberly Smith.

Top Borrower-Side Financing Counsel: Paul Hastings, whose Global PE Practice Chair Brian Richards brings 30 years of experience and whose 2025 deal list includes the $9.25 billion Filtration Group sale to Parker-Hannifin.

Strongest Middle-Market Track Record: Honigman, whose PE group of 60-plus attorneys advised on more than $42 billion in deal value in 2024 and 2025 and ranks in the top 10 nationally for PE transaction count.

Distressed and Special Situations Counsel: Winston & Strawn, Band 2 for 21 years, with noted strength in distressed acquisitions, carve-outs, and leveraged finance for banking, energy, and manufacturing clients.

Rising Market Entrant: McGuireWoods, which entered legal rankings five years ago and built an explicit independent sponsor and emerging manager practice, advising clients including StoneTree Investment Partners and Serata Capital Partners.

Top Firms in Detail

Kirkland & Ellis

The market's dominant PE counsel by deal size and client roster, Kirkland represents virtually every major global fund manager, including GTCR, Thoma Bravo, Bain Capital, Permira, Warburg Pincus, Carlyle, and Ares. Its 2025 workload included the $8.4 billion Clearwater Analytics take-private and the $960 million TransDigm/Stellant Systems deal, demonstrating consistent capacity for nine-figure and ten-figure mandates. Partner Jack S. Levin has been recognized in PE since 1983. The current bench includes Sanford Perl (LBOs of public and private companies), Matthew Steinmetz (large-cap and mid-cap across technology and industrials), and Neil Vohra (complex M&A and PE investments). With 800-plus attorneys in Chicago and full fund formation capability, the firm handles every phase of the PE lifecycle from first fund close to portfolio company exit. PE funds pursuing large-cap buyouts, take-privates, or carve-outs should place Kirkland first on their shortlist.

Latham & Watkins

Latham's Chicago practice anchors a global PE capability that processes more than 500 transactions annually, representing over half a trillion dollars in deal value globally. In 2025, the firm advised on the $8.4 billion Clearwater Analytics take-private and the $6.2 billion CPP Investments/GIP acquisition of ALLETE. It also advised on Great Mountain Partners' $600 million fund formation. Chicago partner Brad Faris leads mega-cap global M&A, and the firm's international network makes it the strongest choice for PE sponsors pursuing cross-border transactions involving European or Asian counterparties. Latham offers full fund formation capability, serving fund managers including Blackstone, Consonance Capital Partners, and Warburg Pincus.

Sidley Austin

Sidley's PE practice spans the full transaction spectrum, from multibillion-dollar leveraged buyouts to growth equity investments in premium middle-market companies. Its sector strength in insurance and automotive PE is the deepest in Chicago, complemented by active healthcare and technology deal flow. Recent 2025 mandates include the BC Partners strategic partnership with Fortidia and the $275 million ABM acquisition of WGNSTAR. The firm also handled the Asurint sale to A&M Capital and the $462.5 million Lumexa Imaging IPO. Chicago PE partners Sean Carney and Chris Abbinante lead the local practice. Sponsors requiring counsel with insurance regulatory depth alongside mainstream LBO capability will find Sidley's integration of capital markets and financial services regulation uniquely suited to complex insurance-adjacent transactions.

McDermott Will & Emery

The strongest healthcare PE practice among Chicago-native firms, McDermott has held Band 2 ranking for 21 consecutive years while building sector expertise in life sciences, food and beverage, and industrials. Its 412 recognized lawyers include named PE partners Brooks Gruemmer (leveraged buyouts and recapitalizations), Nicole Briody (banking and LBO finance), and John Zukin (corporate M&A). Fund managers targeting healthcare services consolidation, pharmaceutical add-ons, or life sciences platform investments have consistently selected McDermott for its regulatory integration. The firm draws from its healthcare-specific compliance and licensing practices to identify deal risks that transactional generalists miss.

Paul Hastings

Paul Hastings built its Chicago PE practice around borrower-side financing expertise, giving it a differentiated angle among counsel who typically represent only the sponsor side. The firm's 2025 deal list includes the $9.25 billion Filtration Group acquisition by Parker-Hannifin and the Great Hill Partners/TodayTix sale to Mari. It also handled aerospace financing for Arcline Investment Management's Novaria Group. Global PE Practice Chair Brian Richards has 30 years of PE experience spanning healthcare, manufacturing, technology, and distribution. PE funds with complex debt structures, and portfolio companies seeking financing advice independent of sponsor interests, benefit from the firm's borrower-side strength as a practical operational advantage.

Katten

Katten's value proposition rests on middle-market depth that rivals Band 1 firms within its target segment. The firm represents PE funds, family offices, independent sponsors, and mezzanine funds seeking subordinated debt with equity features. This makes it the most broadly capable Chicago practice for non-institutional capital structures. Partner Christopher Atkinson co-chairs M&A and PE and has commented publicly on elevated interest rates extending PE holding periods and resetting valuations. Walter Weinberg brings 30-plus years of fund formation experience representing institutional LPs and high-net-worth family offices. The firm's recent mandates include multiple Invision Capital acquisitions and the December 2025 IMS Legal Strategies deal. Independent sponsors seeking counsel that understands fundless structures, without steering them toward Big Law pricing, have a dedicated practice in Katten that no other ranked Chicago firm matches.

Winston & Strawn

Winston & Strawn occupies a specific niche within Chicago's PE legal market: complex transactions that require integrated leveraged finance and distressed capabilities. Band 2 for 21 years, the firm advises global public and private companies on high-profile cross-border deals, with noted strength in distressed acquisitions, carve-outs, and joint ventures. Named partners John Secaras (LBO and M&A) and Michael Domanico (LBO) lead the current Chicago bench. PE funds acquiring distressed assets, executing carve-outs from large industrials, or managing portfolio company financial restructurings benefit from Winston's integrated leveraged finance practice, which handles both the acquisition structure and the credit facility simultaneously.

Honigman

The strongest regional alternative to Big Law on a deal-value-per-attorney basis, Honigman's PE group of 60-plus attorneys advised on more than $42 billion in deal value during 2024 and 2025, placing it in the national top 10 for transaction volume. The firm's middle-market focus covers enterprise values up to $500 million, with sector strength in manufacturing, business services, healthcare, and automotive. Fund clients include Linden Capital Partners, Keystone Capital, O2 Investment Partners, and Benford Capital Partners. Notable 2025 deals include the CB Biotechnology pending acquisition of Theratechnologies at $254 million and Bain Capital's Novopor acquisition of Pressure Chemical Company. Middle-market sponsors seeking senior-led teams at cost structures below major Big Law practices should evaluate Honigman alongside other Band 3 and Band 4 Chicago firms.

Greenberg Traurig

Greenberg Traurig's December 2025 expansion, adding two PE shareholders to its Chicago office, signals an accelerating commitment to the local market. With 150 PE attorneys globally across 27 national offices and an extensive international network, the firm brings breadth that smaller Chicago practices cannot match. Its sector coverage spans consumer products, aerospace, manufacturing, food and beverage, healthcare, financial services, and technology. The firm represented Kohlberg in its 2025 acquisition of Loenbro. PE funds with cross-sector portfolios requiring coordinated deal counsel across multiple practice areas and jurisdictions benefit from Greenberg Traurig's scale.

McGuireWoods

Five years into top-tier legal ranking recognition and accelerating, McGuireWoods has built the most explicit independent sponsor and emerging manager practice among recently ranked Chicago firms. Its client roster includes StoneTree Investment Partners, Summit Park, Serata Capital Partners, and Hull Street Energy, covering healthcare, energy, food and beverage, and business services. A 2025 mandate list includes the Summit Park majority recapitalization of DX Electric and Serata Capital Partners' partnership with EventLink Group. Fundless sponsors and first-time fund managers who need counsel experienced with non-standard capital structures, co-investor negotiations, and management equity terms will find McGuireWoods' explicit emerging manager focus more responsive than larger firms that treat independent sponsor work as overflow.

Investment Trends Shaping Chicago PE Legal Demand

Healthcare Services Consolidation

Healthcare services buyouts and add-on acquisitions remain the single most active sector across Chicago's PE legal market. Firms from Band 1 (Sidley, Kirkland) to mid-market specialists (McDermott, Katten, Honigman) report healthcare as their highest-volume sector, reflecting both the Midwest's concentration of regional hospital systems and sustained PE interest in home health, behavioral health, and specialty services platforms. The regulatory complexity of healthcare add-ons, including antitrust clearance, state licensure, and payor contracting, creates sustained demand for firms with integrated healthcare regulatory practices alongside transactional capability.

Independent Sponsor and Family Office Growth

Independent sponsors, also known as fundless sponsors, represent a structurally growing segment of Chicago PE deal flow. At least six ranked Chicago firms maintain explicit independent sponsor practices: Katten, Aronberg Goldgehn, McGuireWoods, Holland & Knight, BakerHostetler, and Honigman. This client segment requires counsel experienced with deal-by-deal capital raises, co-investor negotiations, and management equity structures that differ materially from committed fund mechanics. Katten's annual independent sponsor analysis is cited as a market reference, reflecting the sustained deal volume this segment generates.

Cross-Border and Carve-Out Transactions

Chicago firms with international networks are handling an increasing volume of cross-border PE transactions and corporate carve-outs, driven by global fund managers targeting U.S. industrials, healthcare, and technology assets. Latham & Watkins advised on the $6.2 billion CPP Investments/GIP ALLETE acquisition, a landmark infrastructure carve-out, in 2025. Baker McKenzie's Chicago practice, Band 2 for 21 years, specializes in carve-out and spin-off structures for multinational pharmaceutical and healthcare clients. Elevated tariff uncertainty and corporate restructuring activity are sustaining a high-volume carve-out pipeline for firms with cross-border infrastructure capable of simultaneous multi-jurisdiction closings.

Take-Private Transactions

Take-private deal volume in Chicago has produced several headline transactions in 2025, including the $8.4 billion Clearwater Analytics acquisition by Permira and Warburg Pincus. Executing a take-private requires counsel capable of managing SEC tender offer requirements, fairness opinions, go-shop processes, and leveraged financing simultaneously. Only Band 1 and Band 2 firms, specifically Kirkland, Latham, Sidley, and Skadden, have the bench depth across corporate, securities, finance, and tax to handle these transactions efficiently in Chicago.

Macro Conditions Extending Deal Mandates

Elevated interest rates, PE valuation resets, and tariff policy volatility have extended holding periods and increased demand for recapitalization and refinancing counsel. Katten's Christopher Atkinson commented specifically on this dynamic in December 2025, noting structural changes in how fund managers are managing portfolio company capital structures under current rate conditions. Firms with both corporate finance and credit facility practices, including Kirkland, Katten, and Paul Hastings, are seeing increased mandates to renegotiate credit agreements and optimize capital structures before planned exits.

How to Choose PE Counsel in Chicago

Start with Illinois Corporate/M&A and Private Equity band rankings. Cross-reference these against legal directory tier rankings for Leveraged Buyouts and Private Equity Law. Kirkland, Latham, Sidley, and Skadden each hold 21 consecutive years of Band 1 recognition, demonstrating consistency across full market cycles, not just single-year performance.

Match the firm's market segment focus and investment thesis alignment to your transaction size. Skadden handles exclusively large-cap work and is not suited for sub-$100 million buyouts. Katten, Honigman, and McGuireWoods are built for middle-market deals and will offer more senior partner attention than a Big Law firm where your mandate represents a small fraction of annual volume.

Verify the depth of the Chicago office specifically, not just the firm's national PE reputation. Several nationally recognized practices, including Ropes & Gray and Perkins Coie, operate through smaller Chicago offices. PE work in these locations may rely on a single partner. Ask how many named PE partners sit in Chicago, confirm who would lead your transaction, and assess whether the day-to-day team includes Chicago-based senior associates.

For general partners (GPs) with fund formation needs alongside deal counsel requirements, confirm the firm offers both capabilities from the same Chicago team. Kirkland, Latham, Sidley, Katten, Reed Smith, Honigman, and Taft all offer combined fund formation and transactional coverage in Chicago, spanning buyout, growth equity, and venture capital strategies. Paul Hastings, Ropes & Gray, and Winston & Strawn handle deal work but not fund formation locally.

Which Firm Fits Your Needs?

Sponsors pursuing large-cap leveraged buyouts, take-privates, or transactions with international counterparties should prioritize Kirkland & Ellis, Latham & Watkins, or Sidley Austin. All three hold Band 1 status with 21 years of recognition and have demonstrated capacity for billion-dollar-plus mandates in 2025. Skadden is a peer choice for particularly complex financial sponsor transactions where its securities and regulatory depth adds material value.

Middle-market sponsors in the $50 million to $500 million range will find better value and senior partner engagement at Katten, Honigman, or Paul Hastings. Katten holds Chicago Tier 1 status in legal directory rankings alongside its Band 3 placement and is the only ranked firm with an explicit mezzanine fund representation practice. LPs evaluating fund managers should note Honigman's performance ratio: $42 billion in 2024-2025 deal value across a 60-attorney team, a figure comparable to much larger national firms.

Independent sponsors, emerging fund managers, and family offices conducting direct investments should begin their evaluation with Katten, McGuireWoods, and Aronberg Goldgehn. Each has built explicit practices for non-institutional capital structures. Aronberg Goldgehn's eight-attorney PE team handles independent sponsor capital raises and add-on acquisitions in aviation, transportation, and software at deal sizes where Big Law pricing is prohibitive. Healthcare-focused PE funds, regardless of size, should include McDermott Will & Emery in any shortlist for its regulatory integration across licensing, compliance, and antitrust.

Methodology

This guide covers private equity law firms with active practices in Chicago, Illinois, based on 2025 Illinois Corporate/M&A and Private Equity band rankings, 2026 legal directory tier data for Leveraged Buyouts and Private Equity Law, and firm-disclosed deal announcements through December 2025. Firms were evaluated across transaction specialties, sector strength, market segment focus, fund formation capability, and independent sponsor practice presence. The analysis of Chicago private equity law firms reflects data current as of early 2026, with deal values drawn from publicly announced transactions. Firms are not ranked by opinion. Band classifications reflect independent editorial assessments based on peer review and client feedback.