Niva WealthLet’s talk

Willson Rasavongxay

Chief Compliance Officer at William Blair & Company

Investment adviser and broker registrationsChicago, ILSEC record checked 18 October 2026

9
Years in the industry
7
Years at the firm
1
Adviser firms
1
State registrations

IAPD record retrieved 18 October 2026SEC record

Willson Rasavongxay is Chief Compliance Officer of William Blair & Company L.L.C., a Chicago investment adviser managing $64.3B. Willson Rasavongxay has been registered through William Blair & Company since 14 October 2019, has 9 years in the industry across 1 firm and has passed the Series 66, SIE and Series 14.

Role at William Blair & Company

Title on Schedule A
Chief Compliance Officer
Control
Willson Rasavongxay is a control person of William Blair & Company.
Ownership
An individual ownership band is not available in the source record.
Tenure
Willson Rasavongxay has held the filed role since December 2019.

The firm

William Blair & Company L.L.C.
Chicago, IL

Form ADV filed 31 March 2026

$64.3B AUM38,171 clients231 advisers12 offices

Career on record

Willson Rasavongxay has been registered through William Blair & Company since October 2019.

Firms and exams, newest first
  1. Passed Series 14 · 2023
  2. William Blair & Company L.l.c.Current
    – present · 7 years
    Chicago, IL · Adviser representative · Firm CRD 1252
  3. Passed SIE · 2018
  4. William Blair & Company L.l.c.
    – · 2 years
    Chicago, IL · Adviser representative · Firm CRD 1252
  5. Passed Series 66 · 2016

Registrations and exams

Willson Rasavongxay has a current investment-adviser registration in Illinois and has passed 3 qualifying exams.

Illinois14 October 2019
Scope
Investment adviser representative
Status
Approved

Examinations

Series 6615 August 2016
Name
Uniform Combined State Law Examination
Series 142 January 2023
Name
Compliance Officer Examination
SIE6 April 2018
Name
Securities Industry Essentials Examination

Individual record

Full name
Willson B Rasavongxay
CRD
6593731
Firm
William Blair & Company L.L.C.
Registration status
Investment adviser and broker registrations
Office
THE WILLIAM BLAIR BUILDING, 150 NORTH RIVERSIDE, Chicago, IL 60606

This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. Check this record on adviserinfo.sec.gov

Common questions

Where does Willson Rasavongxay work?

Willson Rasavongxay has been Chief Compliance Officer of William Blair & Company L.L.C. since December 2019, and is a control person of the firm.

Source: Form ADV, Schedule A, filed 31 March 2026

Is Willson Rasavongxay a financial advisor?

Yes. Willson Rasavongxay has a current investment-adviser registration in Illinois, through William Blair & Company since October 2019, as of 18 October 2026.

Source: IAPD individual record, checked 18 October 2026

How many years of experience does Willson Rasavongxay have?

Willson Rasavongxay has worked in the financial industry for 9 years as of 18 October 2026, counted from 20 July 2017, across 1 adviser firm.

Source: IAPD individual record, checked 18 October 2026

What exams has Willson Rasavongxay passed?

Willson Rasavongxay has passed 3 licensing exams: the Series 66, SIE and Series 14. The earliest, the Series 66, was passed in August 2016.

Source: IAPD individual record, checked 18 October 2026

Where is Willson Rasavongxay based?

Willson Rasavongxay’s registered office is in Chicago, IL.

Source: IAPD individual record, checked 18 October 2026

Leadership at William Blair & Company

Sources

  1. IAPD individual record, CRD 6593731. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of William Blair & Company L.L.C., filed 31 March 2026. Title, control and ownership bands.

Retrieved 18 October 2026. The SEC record may have been amended since.

Report a correction

This profile is compiled from public regulatory records and the firm's own published materials, and is provided for informational purposes only. Niva Wealth is not affiliated with Willson Rasavongxay or William Blair & Company L.L.C. and makes no representation about the quality of their services. This directory does not report disciplinary history, in either direction.