Full text of WILLIAM BLAIR & COMPANY L.L.C.'s X-17A-5 filed 2026-02-26 (period 2025-12-31). Broker-dealer annual report from SEC EDGAR — readable, searchable, and available as markdown for AI agents.
{0}------------------------------------------------ #### CONSOLIDATED STATEMENT OF FINANCIAL CONDITION #### William Blair & Company, L.L.C. As of December 31, 2025 With Report of Independent Registered Public Accounting Firm {1}------------------------------------------------ #### **UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549** 0MB APPROVAL 0MB Number: 3235-0123 Expires: Nov. 30, 2026 Estimated average burden hours per response: 12 # **ANNUAL REPORTS FORM X-17A-5 PART Ill** SEC FILE NUMBER | FACING PAGE<br>Information Required Pursuant to Rules 17a-5, 17a-12, and lSa-7 under the Securities Exchange Act of 1934 | | | | | | |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------|---------|------------------------------|--|--| | AND ENDING 12/3<br>1/2025<br>FILING FOR THE PERIOD BEGINNING O 1/01/2025 | | | | | | | | MM/DD/VY | | MM/DD/VY | | | | A. REGISTRANT IDENTIFICATION | | | | | | | NAME oF FIRM : William Blair & Company, LLC | | | | | | | TYPE OF REGISTRANT (check all applicable boxes):<br>□ Security-based sw ap dealer<br>□ Major securit y-based sw ap participant<br>~ Broker-dealer<br>D Check here if respondent is also an OTC derivatives dealer | | | | | | | ADDRESS OF PRINCIPAL PLACE OF BUSINESS: (Do not use a P.O. box no.) | | | | | | | 150 N. Riverside Plaza | | | | | | | | {No. and Street) | | | | | | Chicago | IL | | 60606 | | | | {City) | {State) | | {Zip Code) | | | | PERSON TO CONTACT WITH REGARD TO TH IS FILING | | | | | | | Michael Trimberger | (312) 364-8703 | | mtrimberger@williamblair.com | | | | {Name) | {Area Code - Telephone Number) | | {Email Address) | | | | B. ACCOUNTANT IDENTIFICATION | | | | | | | INDEPENDENT PUBLIC ACCOUNTANT whose reports are contained in t his fi ling* | | | | | | | PricewaterhouseCoopers LLP | | | | | | | | (Name - if individual, state last, first, and middle name) | | | | | | One North Wacker Drive | Chicago | IL | 60606 | | | | {Address) | {City) | (State) | {Zip Code) | | | | 10/20/2003 | 238 | | | | | | FOR OFFICIAL USE ONLY | | | | | | \* Claims for exemption from the requirement that the annual reports be covered by the reports of an independent public accountant must be supported by a statement of facts and circumstances relied on as the basis of the exemption. Se…Read the full text as markdown