Broker-dealer firm · Chicago, IL
William Blair & Company L.L.C.
SEC-registered investment adviser · CRD 1252 · SEC 801-688
At a glance
William Blair & Company L.L.C. is an SEC-registered investment adviser based in Chicago, Illinois, with $64.3 billion in regulatory assets under management as of its Form ADV filed March 31, 2026. Its largest client group by assets is high-net-worth individuals, and it reports 35,296 individual clients. By Form ADV it is a broker-dealer firm, ranked 24th of 391 broker-dealer firms and 372nd of 17,210 SEC-registered advisers by assets.
Main office 312-236-1600williamblair.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $64B
- Rank among broker-dealer firms
- #24 of 391
- Rank among all SEC RIAs
- #372 of 17,210
- Rank in Illinois
- #27 of 684
- Individual clients
- 35,296
- High-net-worth clients
- 9,054
- Accounts
- 39,781
- Discretionary
- 90% of AUM
- Employees
- 492
- Advisory staff
- 231
- Offices
- 12
Owners and executives on its Form ADV
- Brent Walker GledhillPresident, CEO
- Ryan Jacob DevoreExecutive Committee
- Willson B RasavongxayChief Compliance Officer
- Cissie CitardiExecutive Committee, General Counsel
- Matthew Montgomery ZimmerExecutive Committee
- Beth A SatterfieldExecutive Committee
- Michael William TrimbergerExecutive Committee, CFO
- Scott Thomas McLaughlinExecutive Committee
- Steven Robert ToleExecutive Committee
- Robert Daniel KendallExecutive Committee
Custody and brokerage
Broker-dealer
Hybrid RIA
William Blair & Company L.L.C. is a hybrid RIA: 410 of its employees are also registered representatives of a broker-dealer. It reports a broker-dealer among its affiliates on Form ADV.
Form ADV Part 1 doesn’t name an unaffiliated broker-dealer. The firm’s Part 2A brochure (Item 10) and each adviser’s record on the SEC’s adviser search do.
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| High-net-worth individuals | 9,054 | $45B | 71% |
| Corporations or other businesses | 1,333 | $8.1B | 13% |
| Individuals | 26,242 | $7.3B | 11% |
| Charitable organizations | 31 | $1.8B | 3% |
| Other investment advisers | 1,146 | $1.4B | 2% |
| Pension and profit sharing plans | 364 | $379M | <1% |
| Pooled investment vehicles | 1 | $6M | <1% |
Private funds
William Blair & Company L.L.C. reports 21 private funds with $115M in gross assets: private equity funds (Form ADV Item 7.B).
Disciplinary disclosures
William Blair & Company L.L.C. answers yes to 21 disclosure items in Item 11 of Form ADV (criminal, regulatory or civil matters involving the firm or its advisory affiliates). Read the details on the SEC’s adviser search ↗
Services
- Financial planning
- Portfolio management for individuals and small businesses
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
- Selecting other advisers
- Other services
How it’s paid
- A percentage of assets under management
- Fixed fees
Form ADV and brochures on the SEC’s adviser search ↗williamblair.com ↗
AtlasMembers
The full record on William Blair & Company L.L.C.
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, ten years of filings
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- Growth over one, three and five years
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- Rank against 25 peers of its type and size
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- Owners and executives, with titles and stakes
- 10 namedLocked
- Main office, fax and compliance officer
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- Filing changes this year, with alerts
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Background
Questions
How much does William Blair & Company L.L.C. manage?
William Blair & Company L.L.C. reports $64.3 billion in regulatory assets under management across 39,781 accounts, 90% of it on a discretionary basis, on its Form ADV filed March 31, 2026.
What kind of firm is William Blair & Company L.L.C.?
William Blair & Company L.L.C. is a broker-dealer firm by its Form ADV answers. The firm is itself registered as a broker-dealer as well as an investment adviser.
Who are William Blair & Company L.L.C.’s clients?
By assets, its largest client types are high-net-worth individuals ($45.4 billion, 9,054 clients); corporations or other businesses ($8.1 billion, 1,333 clients); individuals ($7.3 billion, 26,242 clients).
Does William Blair & Company L.L.C. manage private funds?
Yes. It reports 21 private funds with $115 million in gross assets, including private equity funds.
Does William Blair & Company L.L.C. have any disciplinary history?
William Blair & Company L.L.C. answers yes to 21 disclosure items in Item 11 of Form ADV, which covers criminal, regulatory and civil matters involving the firm or its advisory affiliates. The details are on the SEC’s adviser search.
Where these numbers come from
Every figure is William Blair & Company L.L.C.’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-31), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →