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 20 of 20

• John Michael WilliamsCRD 6956612 · Chicago, IL
  Broker
• Margaret Marie WilmouthCRD 6343617 · Chicago, IL
  Broker
• Thomas Alfred WilsonCRD 2176360 · Chicago, IL
  IA RegisteredBroker
• Thomas Alfred WilsonCRD 7268469 · Chicago, IL
  IA RegisteredBroker
• David Michael WisniewskiCRD 6647688 · Chicago, IL
  Broker
• Stephanie Arden WistreichCRD 7931019 · New York, NY
  Broker
• Bozena WojtyloCRD 5390940 · Chicago, IL
  Broker
• Matthew John WolfeCRD 4983143 · Los Angeles, CA
  Broker
• Derek WongCRD 7758171 · New York, NY
  Broker
• Christoph WunnCRD 6566870 · Chicago, IL
  Broker
• Mason George WaldronCRD 8027472 · New York, NY
  Broker
• Ethan Nolan WaskielCRD 7990689 · New York, NY
  Broker
• Cassidy WebbCRD 6961444 · New York, NY
  Broker
• Michael James WegmannCRD 7481536 · New York, NY
  Broker
• Justin WeissCRD 8187426 · Chicago, IL
  Broker
• William David WhitmerCRD 7581940 · Boston, MA
  Broker
• Justin P WhitneyCRD 8114426 · Chicago, IL
  Broker
• Tamar WilsonCRD 6661154 · Chicago, IL
  Broker
• Charles Barrons WinsorCRD 7377742 · Chicago, IL
  Broker
• Olivia May WitteCRD 8099550 · Chicago, IL
  Broker
• Donald Henry YeomansCRD 4711136 · Chicago, IL
  IA RegisteredBroker
• Eric Y YeungCRD 7782126 · New York, NY
  Broker
• Sarah YoonCRD 7273245 · Chicago, IL
  Broker
• Carl Joshua YoungCRD 2931419 · Boston, MA
  IA RegisteredBroker
• Russell YuenCRD 7919114 · New York, NY
  Broker
• Jesse David ZahoranCRD 6328069 · Charlotte, NC
  Broker
• Zachary James ZarnikCRD 6553494 · San Francisco, CA
  Broker
• Steven Michael ZendelCRD 5778951 · Chicago, IL
  IA RegisteredBroker
• Yaakov ZerbibCRD 7562591 · Chicago, IL
  Broker
• Yuang ZhangCRD 7758453 · New York, NY
  Broker
• Shaobo ZhongCRD 7756794 · Chicago, IL
  Broker
• Matthew Montgomery ZimmerCRD 4157826 · Chicago, IL
  Broker
• Nicholas Mason ZimmermanCRD 5738924 · Chicago, IL
  Broker
• Scott ZinkCRD 6375977 · Atlanta, GA
  Broker
• Andrew J ZogbyCRD 7937145 · Chicago, IL
  IA RegisteredBroker
• Scott Mathew ZopfiCRD 6547552 · Chicago, IL
  IA RegisteredBroker
• Elizabeth ZurekCRD 2900996 · Chicago, IL
  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.