William Blair & Company L.L.C.

Firm record

As recorded in SEC IAPD

Firm CRD

1252

SEC number

801-688

Firm type

RIA

Assets under management

$64.3B as of Mar 31, 2026

Website

www.williamblair.com ↗

Phone

312-236-1600

Address

150 North Riverside Plaza, Chicago, IL, 60606

Advisors at this firm

987 in our index · page 15 of 20

• Zachary Tyler PerkinsCRD 8216236 · Chicago, IL
  Broker
• Ethan Josef PitzelCRD 7766600 · New York, NY
  Broker
• Noah PopeCRD 7678485 · New York, NY
  Broker
• Adam G PusinelliCRD 7245676 · Chicago, IL
  IA RegisteredBroker
• Eric Guanghao QiaoCRD 8277193 · Los Angeles, CA
  Broker
• Alexander Chase QuinnCRD 6343989 · New York, NY
  Broker
• Brendan Thomas QuinnCRD 4814087 · New York, NY
  Broker
• Michael Patrick QuinnCRD 3257072 · Chicago, IL
  Broker
• Stephen Matthew QuirkCRD 7127185 · Chicago, IL
  Broker
• Louis QuallCRD 8098744 · Chicago, IL
  Broker
• Gregory Christian QuiliciCRD 2520931 · San Francisco, CA
  Broker
• Allan Cameron RacanskyCRD 5513961 · Chicago, IL
  Broker
• Steve A RadisCRD 1684668 · Chicago, IL
  Broker
• Brendan RaichCRD 7618798 · Chicago, IL
  Broker
• Christine RainsCRD 7352944 · Chicago, IL
  Broker
• Raghav Iyengar RamCRD 7759667 · New York, NY
  Broker
• Elizabeth F RamsCRD 2403886 · Chicago, IL
  BrokerRegistration inactive
• Alexandra RamseyCRD 7411723 · Chicago, IL
  Broker
• Timothy M RandickCRD 5367158 · Chicago, IL
  BrokerRegistration inactive
• Willson B RasavongxayCRD 6593731 · Chicago, IL
  IA RegisteredBroker
• Eric Christopher RaschCRD 7128120 · Chicago, IL
  IA RegisteredBroker
• Kristina Marija RediehsCRD 6010872 · Chicago, IL
  IA RegisteredBroker
• Logan Patrick RehwinkelCRD 7926671 · Chicago, IL
  Broker
• Bridget ReillyCRD 6971927 · Chicago, IL
  Broker
• Patricia Lynn ReillyCRD 1398008 · Chicago, IL
  IA RegisteredBroker
• Benjamin Thomas RemmertCRD 5965764 · Atlanta, GA
  Broker
• Marco ReoliCRD 2465784 · London
  Broker
• Alexander James Howarth ReusCRD 7339674 · London
  Broker
• Jack RhinerCRD 8091656 · Chicago, IL
  Broker
• Benjamin Samuel RibackCRD 4701284 · Chicago, IL
  Broker
• Isabelle RibackCRD 7800311 · New York, NY
  Broker
• Thomas Edward RiesenbergCRD 6008579 · Chicago, IL
  IA RegisteredBroker
• Connor Montgomery RoachCRD 7988766 · Chicago, IL
  Broker
• Michael Edward RobbinsCRD 2117418 · Chicago, IL
  Broker
• Cody RobertsCRD 6971922 · Brooklyn, NY
  IA RegisteredBroker
• Andrea Rodriguez RobledoCRD 7526351 · Chicago, IL
  Broker
• William Kingsbury RogersCRD 7547275 · New York, NY
  Broker
• Alejandro RomanCRD 7403977 · Chicago, IL
  IA RegisteredBroker
• John Trevor RomeoCRD 6691756 · Chicago, IL
  Broker
• Christopher Neam RosamondCRD 4119239 · New York, NY
  IA RegisteredBroker
  Disclosure event(s) on record
• David Connor RosenbergCRD 7926420 · Chicago, IL
  Broker
• Cynthia Ruth RosendaleCRD 3020692 · Denver, CO
  IA RegisteredBroker
• Thomas James Purcell RossCRD 5344432 · London
  BrokerRegistration inactive
• George Dan RousakisCRD 7514871 · Chicago, IL
  Broker
• Karolina Maria RozanskiCRD 7930427 · Chicago, IL
  Broker
• Jacobus Dirk Gerardus Maria RuijerCRD 7218820 · London
  Broker
• Patrick Charles RuleCRD 5891861 · Chicago, IL
  IA RegisteredBroker
• Magalyn Taylor RusticoCRD 7800394 · Chicago, IL
  Broker
• Emily RustomCRD 8113472 · New York, NY
  Broker
• Liam David RyanCRD 7733150 · Charlotte, NC
  Broker

Source & corrections

Where this page comes from

Advisor registration data on this site is reproduced from the SEC's Investment Adviser Public Disclosure (IAPD) system and FINRA's BrokerCheck. Those systems are the official records; this site is not. We do not alter the factual content of the records we reproduce.

Data compiled Aug 21, 2026. Source: ADV_BULK. Your use of BrokerCheck data reproduced here is subject to FINRA's Terms of Use.