M&A Advisory in Illinois
Chicago's $500B+ in resident sponsor AUM — anchored by GTCR's $13.45B AssuredPartners exit and 750 insurance broker deals in 2024 alone — makes Illinois the undisputed non-coastal capital of U.S. lower middle market M&A.
Illinois's M&A Economy
Illinois is the most active lower middle market M&A geography in the Midwest, anchored by Chicago — the nation's premier non-coastal PE hub with $500B+ in resident sponsor AUM and a deep mid-market lender bench including BMO, Northern Trust, Wintrust, and Byline. Chicago ranked #2 of 16 U.S. cities by KPMG for Q3 2024 M&A deal count at roughly 60 deals per quarter. After a soft Q1 2025 when national LMM volume fell 40% quarter-over-quarter per GF Data, Q2–Q4 saw a sharp rebound driven by Fed rate cuts, tariff clarity, and record PE hold periods of 8.2 years with approximately 12,500 unsold portfolio companies nationally per PitchBook. Illinois EBITDA multiples track the national 6–9x range, with manufacturing reset to approximately 6.5x and tech-enabled services trading at 8–10x. The state's economic engine is uniquely diversified: financial services concentration, a deep manufacturing belt at 9.4% of labor force versus 8.4% nationally, top-5 pharma exports, the #1 freight rail hub in North America, and #2 U.S. agricultural exporter. Structural advantages include Chicago's IB and PE infrastructure (GTCR, Madison Dearborn, Thoma Bravo, Adams Street, Vistria, Wind Point, Pritzker Group), CME/CBOE derivatives access, a dense M&A advisory bench (Lincoln International, William Blair, Houlihan Lokey, BMO Capital), and central rail and air logistics positioning. A demographic supply wave amplifies deal flow: roughly 70% of U.S. business owners are over 55, and Illinois's aged owner base in legacy industrials produces an outsized share of the national sell-side pipeline through 2030.
Illinois at a Glance
Key Markets in Illinois
Chicago-Naperville-Elgin MSA
Midwest M&A epicenter concentrating more than 70% of state deal flow. Resident sponsors include GTCR, Madison Dearborn, Thoma Bravo, Vistria, CIVC, BDT & MSD, Frontenac, Linden, Water Street, and Sterling Partners. The city has been the #1 U.S. metro for corporate investment for 11 consecutive years per Site Selection. Deep mid-market lender bench — BMO, Northern Trust, Wintrust, Byline — provides unitranche and syndicated credit access unavailable in most regional markets.
Rockford MSA
Manufacturing-led LMM market with deep aerospace, fastener, and precision-component supply chains anchored by Woodward, Collins Aerospace, Ingersoll Machine Tools, and Bergstrom. Rockford holds the 2nd-most manufacturing jobs in Illinois and is a frequent target geography for Chicago PE add-on roll-ups. Its lower cost basis versus the Chicago metro supports buyer EBITDA quality narratives that translate to multiple expansion.
Peoria MSA
Caterpillar-anchored heavy-equipment ecosystem with a deep Tier 2 and Tier 3 supplier base; strong agribusiness and engineering services activity. Caterpillar's 2022 HQ relocation to Texas tempered strategic buyer demand locally, but the supplier network remains active for PE platform builds. OSF HealthCare is headquartered here, providing a healthcare M&A anchor alongside the industrial base.
Springfield / Champaign-Urbana
Twin central-Illinois markets driven by government services, insurance (Horace Mann, Memorial Health), and the University of Illinois research corridor. The UI Research Park and Carle Health system are growing sources of venture-backed and tech-enabled LMM deal flow, including AgTech spinouts and health-IT targets. Lower deal volume but emerging as a secondary pipeline for Midwest PE.
How Does Illinois Compare?
Illinois M&A benchmarks vs. neighboring states.
Illinois Deal Landscape 2025-2026
Illinois M&A activity tracked the national rebound in 2025: U.S. PE deal value reached $1.2 trillion (the second-highest on record per PitchBook) and deal count rose approximately 12.8% in 2024 to 8,473 transactions. Illinois-headquartered PE firms — GTCR, Madison Dearborn, Thoma Bravo, Pritzker, Wind Point, Shore, Linden, BPOC, Frontenac — collectively manage well over $400B in AUM and were major contributors to national volume. PE-backed buyers dominated, representing 72% of insurance broker deals and the majority of food and healthcare add-ons. The single biggest driver of Illinois M&A is the succession and baby-boomer exit wave colliding with approximately $1.1T in U.S. PE dry powder and three Fed rate cuts totaling 75 bps in 2025 that reopened LBO financing for Chicago's deep insurance, food, and healthcare roll-up platforms.
Mega-Scale Insurance Broker Consolidation Centered on Chicago
Chicago's broker concentration produced the cycle's defining transaction — GTCR's $13.45B sale of AssuredPartners to Arthur J. Gallagher (announced December 2024, closed August 2025). Madison Dearborn completed an unusual $2.7B reacquisition of Wealthspire/Fiducient/Newport from Aon in Q4 2025 at approximately 21x EBITDA. Gallagher closed approximately $3.4B in revenue acquisitions year-to-date 2025 with a 35-deal pipeline. OPTIS Partners recorded 750 U.S. broker deals in 2024, with PE-backed buyers driving 72% of activity.
Pritzker and Shore Capital Drive Mid-Market Food & Beverage Roll-ups
Shore Capital closed F&B Fund III at $450M in July 2025 (oversubscribed), bringing total AUM to approximately $13B. Portfolio company Whetstone Distribution acquired Anmar Foods; Maintera Facility Services platform launched January 2026. Pritzker Private Capital acquired Buckman (July 2025) and NaturPak (January 2026) and is exploring a sale of Sprayway. Wind Point Partners closed Fund X at $2.3B and exited FoodScience to Morgan Stanley Capital Partners in November 2024.
Chicago Software Take-Privates by Local Mega-Sponsors
Thoma Bravo (~$181B AUM mid-2025; closed $34.4B across three funds in June 2025) announced its $4.4B take-private of PROS Holdings in September 2025 and acquired Chicago-based Trading Technologies from 7RIDGE in July 2025. GTCR sold Worldpay to Global Payments for $24.25B (announced April 2025), acquired Tranzact for $632M (January 2025), and bought SimpliSafe from Hellman & Friedman for more than $2.5B in September 2025.
Carve-outs and Search-Fund Activity in the Lower Middle Market
U.S. carve-outs hit 11.8% of all PE buyouts in Q4 2024, the highest share since 2016 per PitchBook. Illinois examples include Brynwood Partners' Miracapo Pizza carve-out and AB Mauri's acquisition of Omega Yeast Labs. Frontenac (Chicago, lower-middle-market CEO1ST strategy), Svoboda Capital, Prospect Partners, and Granite Creek Capital Partners were highly active sub-$50M EV. Tilia Holdings acquired Caputo Cheese in Melrose Park in June 2025.
Exit Preparation Timeline
A practical roadmap for Illinois business owners planning an exit.
- Conduct entity and QSBS structuring review — evaluate C-corp conversion or F-reorganization to start the Section 1202 QSBS holding clock under post-OBBBA rules (stock issued after July 4, 2025 eligible for $15M exclusion) and model PPRT impact across entity types under 35 ILCS 5/201(c).
- Execute Illinois estate tax and wealth transfer planning by establishing credit-shelter and bypass trusts to capture both spouses' $4M exemptions (no portability under 35 ILCS 405), funding Irrevocable Life Insurance Trusts, and executing discounted minority-interest gifts well before any Letter of Intent.
- Build the Quality of Earnings foundation with a sell-side QoE that normalizes three years of EBITDA, documents owner add-backs, and reconciles to Illinois apportionment — addressing PPRT exposure on pass-through asset sales per the 2024 IDOR General Information Letter.
- Complete a BIPA and privacy compliance audit of any biometric timekeeping, security, or HR systems, remediating written-release documentation gaps under post-SB 2979 (August 2024) standards at least 24 months before launch to satisfy R&W insurance underwriters.
- Make the annual PTET election decision on Form IL-1065 or IL-1120-ST for the transaction year (now permanent post-December 12, 2025 legislation) and begin quarterly estimated payments — the election must be made before the extended due date (March 15/October 15 for S-corps; April 15/October 15 for partnerships) and is irrevocable.
- Run a domicile and residency-change analysis for owners contemplating relocation, documenting the Illinois 183-day statutory test and effecting domicile change at least 12+ months pre-closing — IDOR aggressively audits departing high-net-worth residents and tracks utility bills, voter registration, and club memberships.
- Develop the Confidential Information Memorandum, buyer list, and process architecture, weighting heavily toward Chicago and Midwest financial sponsors and Illinois manufacturing or financial services strategics capable of closing at premium multiples.
- Address customer concentration, key-person risk, and IP remediation — formalize employment and non-compete agreements consistent with the Illinois Freedom to Work Act (which limits non-competes for employees earning under $75,000) and document the management team's ability to operate without the founder.
- Launch the process and manage the Indication of Interest round, narrowing to four to six finalists for management presentations often staged in Chicago or Naperville — leverage the Chicago PE network to generate competitive tension across insurance, food/beverage, logistics, and healthcare sponsor verticals.
- Compile pre-sale bulk sales and tax clearance preparation — assemble Illinois withholding, sales tax, PPRT, and unemployment account histories and pre-clear with IDOR via MyTax Illinois ahead of the formal CBS-1 filing to identify any stop-order risk before announcing exclusivity.
- Place representations and warranties insurance (typical premium of 2–4% of EV); underwriters now scrutinize BIPA exposure heavily under the post-SB 2979 per-person damages framework, so robust pre-signing biometric audits reduce both premium and exclusions.
- Negotiate the working capital peg and net debt definition, including tax-related items like deferred PTET balances, accrued PPRT on asset-sale transactions, and any IDOR audits in progress — misalignment here is the most common cause of post-LOI re-trades in Illinois deals.
- File Form CBS-1 under 35 ILCS 5/902(d) at least 10 business days pre-closing (45 days for Cook County) to obtain the IDOR withhold order or release certificate and extinguish buyer successor liability for unpaid income, withholding, sales/use, and PPRT taxes up to the value of assets acquired.
- Make the final PTET true-up payment to maximize the federal SALT deduction — cash-basis entities must pay before year-end; coordinate with the permanent PTET election enacted December 12, 2025 to ensure the stub-period return on Form IL-1065 or IL-1120-ST reflects the transaction gain.
- Re-document the estate plan and liquidity event for the post-liquidity asset mix; fund GRATs, SLATs, and charitable vehicles before transaction-driven valuation increases further — Illinois's non-portable $4M estate tax exemption requires proactive planning in the 90 days post-close.
- Finalize purchase price allocation under IRC §1060 and §338(h)(10) elections and state conformity filings, including final IL-1120-ST or IL-1065 short-period returns with PTET reconciliation and Illinois Schedule M apportionment documentation.
Why Illinois Business Owners Choose Ad Astra
Local market knowledge and national buyer networks — the combination that drives premium outcomes for Illinois business owners.
Schedule a ConsultationChicago PE Network Access
Chicago hosts 42+ active PE firms with sector specialists invisible from outside the market — Red Arts Capital (logistics), Arbor Investments (food and beverage), Linden and Waud Capital (healthcare), Shore Capital (micro-cap healthcare), Wind Point (consumer). Lincoln International ($214.1M net income in 2025, +31% YoY), William Blair, Baird, Mesirow, and Houlihan Lokey run the largest Chicago middle-market sell-side benches. Our relationships in this dense ecosystem are built on closed transactions, not cold calls.
Illinois Tax Code Expertise
We navigate the unique interplay of Illinois's 4.95% flat individual tax, the 1.5%/2.5% Personal Property Replacement Tax under 35 ILCS 5/201(c), the post-December 2025 permanent PTET election on Form IL-1065/IL-1120-ST, and the non-portable $4M estate tax exemption (35 ILCS 405) at rates topping 16%. Pre-engagement tax modeling routinely identifies 200–500 basis points of after-tax proceeds improvement on $5M–$100M EV transactions.
BIPA and Regulatory Diligence Leadership
Few advisors fully understand how the August 2024 BIPA amendments (SB 2979), the Illinois Freedom to Work Act non-compete restrictions under IC 13-8-3-2.5, the Illinois Human Rights Act AI-in-employment rules (effective January 1, 2026), and bulk-sale clearance under 35 ILCS 5/902(d) interact in a transaction context. We embed pre-process compliance audits — particularly biometric device documentation — to remove these issues from the buyer's diligence list and reduce R&W insurance premiums.
Illinois Manufacturing and Financial Services Sector Depth
We have closed transactions across Illinois's anchor industries — precision manufacturing in the Chicago, Schaumburg, and Rockford corridor; agricultural and food processing in Peoria and downstate; and financial services and fintech in the Loop and Naperville. Our buyer database is curated specifically around the state's capital sources actively deploying in lower-middle-market mandates, producing competitive auction processes that consistently generate 20–25% premiums above pre-process seller expectations.
Illinois M&A Activity Highlights
December 2024 (closed August 2025): GTCR exited AssuredPartners to Arthur J. Gallagher for $13.45B — the largest insurance broker deal of the cycle — with $160M in expected synergies and $500M in integration costs.
Q4 2025: Madison Dearborn agreed to repurchase Wealthspire/Fiducient/Newport from Aon for $2.7B (~$127M trailing EBITDA, ~21x); Madison Dearborn manages approximately $16.1B in AUM.
March 2024: Wind Point Partners closed Fund X at the hard cap of $2.3B versus a $1.7B target, deploying into Buske Lines (November 2025), Hasa Inc., Sigma Defense, and the ExperiGreen/Turf Masters consolidation.
July 2025: Shore Capital closed Food & Beverage Fund III at $450M (oversubscribed; total AUM ~$13B); Whetstone Distribution and FirmaPak made Crain's Chicago Fast 50; Maintera Facility Services platform launched January 2026.
2025: Echo Global Logistics (Chicago, The Jordan Company) closed the acquisition of ITS Logistics, creating an AI-enabled 3PL with approximately $5.2B combined revenue and 60+ North American locations.
Tax & Deal Structure in Illinois
Illinois presents a mixed but generally moderate tax environment for sellers. While the flat 4.95% individual income tax rate is relatively low compared to coastal states, sellers face several distinctive headwinds: capital gains receive no preferential rate, the Personal Property Replacement Tax creates effective double taxation on pass-through asset sales, and the non-portable $4M estate tax exemption catches a growing number of business-owner estates. December 2025 legislation making the PTET permanent and the August 2024 BIPA reform have materially improved the planning landscape.
Individual Income Tax & Permanent PTET Election
FavorableIllinois imposes a flat 4.95% individual income tax under 35 ILCS 5/201 on all ordinary income and capital gains with no graduated brackets and no surtax on high earners. On December 12, 2025, Illinois enacted legislation removing the PTET sunset, making the annual election on Form IL-1065 or IL-1120-ST permanent. The election is irrevocable after the extended due date and serves as a federal SALT-cap workaround under the OBBBA's $40,000 federal SALT limit.
Capital Gains Treatment — No Preferential Rate
UnfavorableIllinois taxes all capital gains as ordinary income at the flat 4.95% rate with no preferential long-term rate, no exclusion, and no step-down for installment sales. Unlike the federal system's 0/15/20% LTCG rates plus 3.8% NIIT, Illinois makes no distinction between short- and long-term gains. Sellers should model state tax on earnouts, rollover equity vesting, and deferred-payment notes. Pre-closing residency-change planning can eliminate Illinois income tax entirely on the gain for a non-Illinois-source business.
QSBS Section 1202 Conformity
FavorableIllinois is a rolling conformity state to the Internal Revenue Code under 35 ILCS 5/102 and fully conforms to the federal Section 1202 QSBS gain exclusion at both individual and corporate levels — gain excluded federally is also excluded from Illinois 4.95% tax. With OBBBA's expansion for stock issued after July 4, 2025 (tiered 50%/75%/100% exclusion at 3/4/5 years; cap raised from $10M to $15M; gross-asset threshold raised from $50M to $75M), C-corp sellers can potentially shield up to $15M+ of gain from both federal and state tax.
Personal Property Replacement Tax — Double Taxation Risk
UnfavorableIllinois imposes a separate entity-level PPRT under 35 ILCS 5/201(c) at 2.5% on C-corporations and 1.5% on S-corporations, partnerships, and trusts — creating a combined C-corp rate of 9.5% (7% + 2.5%), the third-highest combined rate nationally. Per a 2024 IDOR General Information Letter, a partnership's sale of business assets including goodwill is subject to PPRT at the entity level with no offsetting credit at the owner level, creating effective double taxation. Pre-sale distribution of assets to owners where structurally feasible may avoid this trap.
Illinois Estate Tax — Non-Portable $4M Exemption
UnfavorableIllinois imposes a separate state estate tax with a $4,000,000 exemption under 35 ILCS 405 that is not indexed for inflation and unchanged for 2025–2026, at graduated rates topping out at 16% on estates above approximately $10M. Illinois provides no portability between spouses, meaning a deceased spouse's unused exemption is permanently lost without a credit-shelter or bypass trust structure. Form 700 must be filed within 9 months of death if the gross estate exceeds $4M. Pending HB 2601 would raise the exclusion to $8M but has not been enacted as of April 2026.
Bulk Sales Clearance — Form CBS-1 Requirement
NeutralThe critical compliance trap in Illinois asset sales is the bulk sales notification requirement under 35 ILCS 5/902(d): the purchaser must file Form CBS-1 at least 10 business days prior to closing, and IDOR has 10 business days to issue a withhold order (extendable to 60). Failure to file makes the buyer personally liable for the seller's unpaid Illinois income, withholding, sales/use, and PPRT taxes up to the value of assets acquired. Cook County imposes a parallel 45-day requirement. Clean bulk-sales clearance is a near-universal closing condition in Illinois M&A.
Representative Transaction
Illustrative model only. Not representative of a current or past Ad Astra Equity client engagement. Details modified to protect client confidentiality. Ranges are representative.
The Business
Precision metal components manufacturer, Schaumburg/Rockford IL
Key Metrics
Revenue
$42M - $48MEBITDA
$7.5M - $9.0MMargin
17%-19% (above ~13% Midwest precision-machining median)Retention
>95% revenue retention over 5 years; top-10 customer concentration <45%The Challenge
The founder, age 67, was deeply embedded in customer relationships and quoting — a classic key-person risk that buyers initially flagged as warranting a 1.0x–1.5x EBITDA discount. The company had also deployed biometric fingerprint time-clocks at both plants for over six years without compliant BIPA written-release documentation under 740 ILCS 14/15(b), creating a potential class-action exposure for approximately 180 current and former employees within the 5-year statute of limitations.
The Process
- 1Contacted 87 buyers (32 strategic acquirers and 55 financial sponsors with manufacturing theses) under NDA over a 4-week outreach period.
- 2Generated 14 Indications of Interest ranging 5.5x–7.5x TTM EBITDA; hosted management meetings in Chicago for the top 8 finalists.
- 3Received 6 Letters of Intent; selected a Chicago-based middle-market PE platform for exclusivity based on valuation, certainty of close, and commitment to retain Rockford operations.
- 4Conducted 90-day pre-launch BIPA remediation program, filing written-release documentation for all current and former employees, resolving the contingent liability before it appeared in buyer diligence.
- 5Closed in 105 days from LOI with extended diligence focused on BIPA remediation, IDOR bulk-sales clearance under Form CBS-1, and §338(h)(10) modeling with a seller gross-up for the PPRT impact.
Deal Outcome
Enterprise Value
7.0x-7.8x EBITDA
Premium vs. Market
20-25% above pre-process expectation
Time to Close
~9 months
Seller Rollover
70-75% cash, 15-20% rollover equity in NewCo, 10% performance-based earnout
Key Lessons
- BIPA remediation must precede process launch in Illinois — buyers and R&W insurance underwriters now treat BIPA exposure as a deal-breaker absent compliant written-release documentation; a 90-day pre-launch remediation prevented a six-figure escrow holdback and policy exclusion.
- PPRT planning matters in pass-through asset sales — modeling the 1.5% PPRT impact at the S-corp level and structuring the §338(h)(10) gross-up accordingly preserved approximately $300K of after-tax proceeds that would otherwise have been lost.
- Key-person de-risking through structured rollover equity and earnout converted what buyers initially treated as a 1.0–1.5x discount into a value bridge that yielded a 20–25% premium above pre-process expectation.
- Illinois's deep Chicago PE ecosystem requires a curated process — all 6 LOIs came from the Chicago metro, and the winning buyer was sourced through a long-standing relationship unavailable to out-of-state advisors.
Frequently Asked Questions
Common questions about selling a business in Illinois.
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