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 9 of 20

• Isabella JamnaprasadCRD 7755134 · New York, NY
  Broker
• Ross Harned JannottaCRD 2925506 · Chicago, IL
  IA RegisteredBroker
• Kathryn Paige JansonCRD 7923214 · Chicago, IL
  Broker
• Steven Jay JefferisCRD 709139 · Fort Meyers, FL
  IA RegisteredBroker
  Disclosure event(s) on record
• Andrew William JeffreyCRD 2750646 · San Francisco, CA
  Broker
• Lucy Clare JeffsCRD 7524094 · New York, NY
  Broker
• Georgia JenningsCRD 7798804 · New York, NY
  Broker
• Erik Thomas JensenCRD 8098657 · Los Angeles, CA
  Broker
• Steven Robert JesanisCRD 4654348 · Chicago, IL
  IA RegisteredBroker
• Andrew Michael JessenCRD 2917781 · Chicago, IL
  Broker
• Sabina JohnsonCRD 6960816 · Chicago, IL
  Broker
• Simon JohnstoneCRD 6131579 · London
  Broker
• Leslie Peter JonasCRD 2958750 · London
  Broker
• Blake Nathaniel JonesCRD 4006082 · Chicago, IL
  Broker
• James Emlyn JonesCRD 4980904 · Chicago, IL
  BrokerRegistration inactive
• Sanjeev JoshiCRD 6267383 · Baltimore, MD
  IA RegisteredBroker
• Mizuki KaiCRD 8096363 · New York, NY
  Broker
• Ritsuki KaiCRD 8114838 · Chicago, IL
  Broker
• Carolyn Therese KaiserCRD 2599122 · Chicago, IL
  IA RegisteredBroker
• Clifford Michael KalishCRD 5056443 · Chicago, IL
  BrokerRegistration inactive
• Christopher KaneCRD 7931011 · New York, NY
  Broker
• Declan KaneCRD 7798828 · Chicago, IL
  Broker
• Argiris Christ KantzavelosCRD 4673921 · Chicago, IL
  IA Registered
• Jake KaplanCRD 6808068 · New York, NY
  Broker
• Max B KaplanCRD 5683565 · Chicago, IL
  IA RegisteredBroker
• Robert Samuel KarlovCRD 7494466 · Chicago, IL
  Broker
• Cameron Raymond KasmarCRD 6841232 · Chicago, IL
  IA RegisteredBroker
• David Louis KasperekCRD 4746173 · Chicago, IL
  IA RegisteredBroker
• William Ogden KastenCRD 1200104 · Chicago, IL
  IA RegisteredBroker
  Disclosure event(s) on record
• Charlotte KatterCRD 6326473 · Chicago, IL
  Broker
• Jonathan Marley KaufmanCRD 6581952 · Chicago, IL
  Broker
• Blake Stuart KeatingCRD 6846945 · Chicago, IL
  Broker
• Anna Kathleen KeefeCRD 7623787 · Chicago, IL
  Broker
• Eric KellerCRD 7143789 · Chicago, IL
  Broker
• Kathleen Erin KellyCRD 4705592 · Chicago, IL
  IA RegisteredBroker
• Matthew Lockhart KellyCRD 6653633 · Chicago, IL
  IA RegisteredBroker
• Robert Daniel KendallCRD 2765873 · Chicago, IL
  Broker
• Cristopher David KennedyCRD 3246551 · Chicago, IL
  Broker
• Amber Colleen KennellyCRD 7632090 · Chicago, IL
  Broker
• Joshua KennellyCRD 7798834 · Chicago, IL
  Broker
• Spencer KenneyCRD 7720276 · Chicago, IL
  IA RegisteredBroker
• Shakila A KhanCRD 7095403 · Chicago, IL
  Broker
• Jenna Patrice KiernanCRD 5785278 · Chicago, IL
  Broker
• Eugene Kyong KimCRD 5878503 · New York, NY
  Broker
• Briggs Thomas KingCRD 7771239 · Chicago, IL
  Broker
• Charles Michael KintnerCRD 7754912 · Chicago, IL
  Broker
• Robert Harold KjellmanCRD 1046824 · Boston, MA
  IA RegisteredBroker
• Adam KlauberCRD 2637379 · Chicago, IL
  Broker
• Kale Alan KlekotaCRD 6215106 · Chicago, IL
  Broker
• Paul Allan KniepCRD 2915791 · Chicago, IL
  BrokerRegistration inactive

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.