William Blair & Company

{{Short description|American multinational independent investment bank and financial services company}}

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{{Infobox company

| name = William Blair & Company

| logo = William Blair wordmark.svg

| type = Privately held

| industry = Financial services

| founded = 1935

| founder = William McCormick Blair

| hq_location = 150 North Riverside Plaza

| hq_location_city = Chicago, Illinois

| hq_location_country = United States

| area_served = Worldwide

| key_people = {{unbulleted list|Brent Gledhill{{Cite web |last=Beltran |first=Luisa |title=William Blair Names New CEO—Brent Gledhill |url=https://www.barrons.com/articles/william-blair-new-ceo-brent-gledhill-51642086998 |access-date=2025-04-30 |website=barrons |language=en-us}} (President and CEO)|Michael Trimberger{{Cite web |title=Michael Trimberger "Mike" Chief Financial Officer, William Blair & Co LLC |url=https://www.bloomberg.com/profile/person/18299195 |url-status=live |website=bloomberg.com}} (CFO)|Matt Zimmer{{Cite web |title=Matthew Zimmer William Blair |url=https://www.williamblair.com/bios/Matthew-Zimmer |access-date=2025-04-30 |website=www.williamblair.com |language=en}} (Global Head of Investment Banking)}}

| products = Investment banking and wealth management

| aum = $123 billion (December 2020){{Cite web|title=About William Blair|url=https://www.williamblair.com/en/About-William-Blair.aspx|publisher= William Blair|access-date=2021-02-07}}

| num_employees = 1,400+

| homepage = {{URL|www.williamblair.com}}

}}

William Blair & Company ("William Blair") is an American multinational independent investment bank and financial services company focusing on investment banking, investment management, and private wealth management.{{cite web|title=William Blair profile|url=https://brokercheck.finra.org/firm/summary/1252|publisher=BrokerCheck|access-date=18 August 2017}} The firm currently reports $17 billion of reportable assets and 1,700 open positions.{{cite web|title=William Blair - Latest 13F Holdings|url=https://fintel.io/i/blair-william-co-il|publisher=Fintel|access-date=2 September 2019}}

The firm, which opened in 1935, is independent and employee-owned, operating in more than 20 offices with headquarters in Chicago, Illinois.{{cite web |title=Company Overview of William Blair & Company, L.L.C. |url=https://www.bloomberg.com/research/stocks/private/snapshot.asp?privcapId=664056 |website=Bloomberg |access-date=19 August 2018}} The firm has had six CEOs or managing partners, three of whom continue to work at the firm. Brent Gledhill, who has served as president and CEO since 2022, heads the firm's executive committee.{{Cite web |title=Brent Walker Gledhill Pres/CEO William Blair & Co LLC |url=https://www.bloomberg.com/profile/person/15478593 |website=bloomberg.com}}