William Blair & Company Overview
- Service
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Investment Bank
- Year Founded
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1935
- Employees
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2,507
- Serviced Companies
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2,617
- Serviced Deals
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3,108
- Serviced Investors
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423
William Blair & Company General Information
Description
Founded in 1935, William Blair & Company is an investment banking firm headquartered in Chicago, Illinois. The firm focuses on providing mergers and acquisitions advisory, corporate recapitalizations, fairness opinions, and leveraged buyout transaction services. The firm's other services include advising clients across industries such as consumer, retail, financial services, energy, healthcare, manufacturing, industrials, and technology.
Contact Information
Website
www.williamblair.comYear Founded
Corporate Office
- The William Blair Building
- 150 North Riverside Plaza
- Chicago, IL 60606
- United States
William Blair & Company Services to Companies
Service on a Deal (3,116)
William Blair & Company has provided services on 3116 deals. It last acted as a general advisor to Old Dominion Insulation on a made for . The deal was made in 2026.
| Company Name | Service Provided | Deal Date | Deal Type | Deal Amount |
|---|---|---|---|---|
| Old Dominion Insulation | Advisor: General | Nov 2026 | ||
| StormTrap | Advisor: General | Nov 2026 | ||
| vVardis | Underwriter | Nov 2026 | ||
| NeuroStar | Underwriter | Nov 2026 | ||
| Flint Group (Kansas City) | Advisor: General | Nov 2026 | ||
| Vexcel Imaging | Advisor: General | Oct 2026 | ||
| Alpha Teknova. | Underwriter | Oct 2026 | ||
| A1 Garage Door Service | Advisor: General | Oct 2026 | ||
| Paragon Films | Advisor: General | Oct 2026 | ||
| Accelevation Holdings | Underwriter | Oct 2026 |
William Blair & Company Services to Investors
Service on a Deal — Buy Side (552)
William Blair & Company has provided buy side services on 552 deals. It last acted as a financial due diligence advisor to Birch Hill Equity Partners on a . The deal was made in 2026.
| Investor Name | Service Provided | Deal Date | Deal Type | Deal Amount |
|---|---|---|---|---|
| Birch Hill Equity Partners | Advisor: Financial Due Diligence | Nov 2026 | ||
| PAI Pharma | Advisor: General | Nov 2026 | ||
| Blackstone | Advisor: General | Oct 2026 | ||
| Morgan Stanley Investment Management | Advisor: General | Oct 2026 | ||
| I Squared Capital | Advisor: General | Oct 2026 | ||
| Bain Capital Tech Opportunities | Advisor: General | Sep 2026 | ||
| AAR | Advisor: General | Sep 2026 | ||
| H.I.G. Capital | Advisor: General | Sep 2026 | ||
| Knox Lane | Advisor: General | Sep 2026 | ||
| Point 41 Capital Partners | Advisor: General | Sep 2026 |
Service on a Deal — Sell Side (617)
William Blair & Company has provided sell side services on 617 deals. It last acted as a general advisor to Alchemy Partners on a made for . The deal was made in 2026.
| Investor Name | Service Provided | Deal Date | Deal Type | Deal Amount |
|---|---|---|---|---|
| Alchemy Partners | Advisor: General | Nov 2026 | ||
| CVC Capital Partners | Advisor: General | Nov 2026 | ||
| 21 Invest | Advisor: General | Oct 2026 | ||
| Rhône Group | Advisor: General | Oct 2026 | ||
| IceLake Capital | Advisor: General | Oct 2026 | ||
| May River Capital | Advisor: General | Sep 2026 | ||
| AEA Investors | Advisor: General | Sep 2026 | ||
| Castle & Cooke Homes Hawaii | Advisor: General | Sep 2026 | ||
| Audax Private Equity | Advisor: General | Sep 2026 | ||
| Dunes Point Capital | Advisor: General | Sep 2026 |
William Blair & Company Investment Preferences
| Preferred Industries | Preferred Verticals | Preferred Deal Types | Geographic Preferences | Transaction Amount |
|---|
News about William Blair & Company
Dive into recent articles by PitchBook offering invaluable insights and context.
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NEWS | Nov 11, 2026
CVC Capital Partners secondaries MD to join William Blair
Moves from the PE funds to investment banks are becoming less rare as exits—and carried interest checks—get pushed further into the future.
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NEWS | Oct 27, 2026
Blackstone buys part of $1.3B co-investment portfolio
The 22-deal package was priced at around a 20% discount, with KKR the largest sponsor represented.
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NEWS | Jun 24, 2026
SEC probe could pressure PE to show its work on continuation funds
PE found a way around a difficult market for selling companies: It sells to itself. Now the SEC wants to know how.
William Blair & Company Affiliates
Subsidiaries (1)
| Name | Industry | Location | Year Founded |
|---|---|---|---|
| Inner Circle Sports | Boca Raton, FL | 2002 |
William Blair & Company FAQs
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When was William Blair & Company founded?
William Blair & Company was founded in 1935.
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Where is William Blair & Company headquartered?
William Blair & Company is headquartered in Chicago, IL.
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What is the size of William Blair & Company?
William Blair & Company total number of employees/professionals is 2,507.
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What service provider type is William Blair & Company?
William Blair & Company's service provider type is Investment Bank.
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What companies has William Blair & Company invested in or acquired?
William Blair & Company has invested in or acquired companies like Armentum Partners, Serpentix, and Inner Circle Sports.
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What are William Blair & Company subsidiaries?
Inner Circle Sports is a subsidiary of William Blair & Company.
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