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 1 of 20

• Robert Sloan AbbeCRD 2666427 · San Francisco, CA
  Broker
• Cathy Eileen AbbottCRD 1338669 · Chicago, IL
  IA RegisteredBroker
• Albert AbdoCRD 6376918 · Fort Myers, FL
  IA RegisteredBroker
• Michael David AbrahamsonCRD 3046086 · Chicago, IL
  Broker
• Naeal Abu SpeitanCRD 7617690 · New York, NY
  Broker
• Jason N AderCRD 2944455 · Boston, MA
  Broker
• Ankit AgarwalCRD 6818155 · Chicago, IL
  Broker
• John Tobin AhlertCRD 6669328 · Chicago, IL
  Broker
• Ryan Dominic AirolaCRD 5356258 · Chicago, IL
  IA RegisteredBroker
• Danny AkkadCRD 7754681 · Chicago, IL
  Broker
• Dhruv AkshinthalaCRD 7764727 · New York, NY
  Broker
• Rami Al-BazerganCRD 6946580 · London
  Broker
• Altan AldemirCRD 7500529 · New York, NY
  Broker
• Mohammad Jamil AliCRD 4476604 · Chicago, IL
  Broker
• Haley AllenCRD 7784094 · Chicago, IL
  Broker
• John Joseph AllenCRD 2717302 · London
  Broker
• James AlversonCRD 4471490 · Chicago, IL
  IA RegisteredBroker
• Michael AmofaCRD 5683171 · Chicago, IL
  Broker
• Jon Robert AndersenCRD 4911250 · Chicago, IL
  Broker
• Lisa Dawn AndersonCRD 2385233 · Chicago, IL
  Broker
• Mark Vann AndersonCRD 6905647 · Chicago, IL
  Broker
• Richard Grissim AndersonCRD 8126770 · Chicago, IL
  Broker
• Tania Lynn AndersonCRD 2997228 · Chicago, IL
  Broker
• Beth L AnthonyCRD 4139447 · Chicago, IL
  BrokerRegistration inactive
• Katelyn AntosCRD 7700026 · Chicago, IL
  Broker
• Danielle Marie ArtzCRD 6953261 · Chicago, IL
  IA RegisteredBroker
• Marcelo Assalin Dias Da CostaCRD 7218740 · London
  Broker
• Davis AufdembrinkCRD 7522929 · Chicago, IL
  Broker
• Nancy Ann AversaCRD 2711191 · Chicago, IL
  Broker
• Julie Jefferis AbdoCRD 7275944 · Fort Myers, FL
  IA RegisteredBroker
• Zachary AbramsCRD 8102976 · Chicago, IL
  IA RegisteredBroker
• Frederick AllaireCRD 8235042 · New York, NY
  Broker
• Anthony AlvesCRD 7322330 · Boston, MA
  Broker
• Earl Eugene BainCRD 7363444 · Chicago, IL
  Broker
• Kyle BakhshiCRD 5883158 · Chicago, IL
  IA RegisteredBroker
• Rashmi Balaji SinghCRD 6372123 · Chicago, IL
  Broker
• Anthony George BaldwinCRD 2736486 · Chicago, IL
  Broker
• William Talbott BaldwinCRD 6226578 · Chicago, IL
  Broker
• Darren Daniel BankCRD 6242345 · Chicago, IL
  Broker
• Walter Gerard BarrCRD 4916892 · Chicago, IL
  BrokerRegistration inactive
• Matthew Francis BarrettCRD 3036427 · Baltimore, MD
  IA RegisteredBroker
• Reto B BaruffolCRD 2228487 · Zurich
  Broker
• Christopher Patrick BasquillCRD 6838096 · Charlotte, NC
  Broker
• Jake Everett BatchelderCRD 7846321 · New York, NY
  Broker
• Preston BatemanCRD 6971515 · Chicago, IL
  Broker
• Christopher William BatesCRD 8163765 · London
  Broker
• Levente Paul BathoryCRD 7350203 · Charlotte, NC
  Broker
• Jack C BaudhuinCRD 6750014 · Chicago, IL
  Broker
• Brandon John BauerCRD 6439553 · Chicago, IL
  Broker
• Megan Osmond BaumanCRD 6243380 · Chicago, IL
  IA RegisteredBroker

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 20, 2026. Source: ADV_BULK. Your use of BrokerCheck data reproduced here is subject to FINRA's Terms of Use.