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Guillaume Decalf, portrait

Guillaume Decalf

CEO and Chief Compliance Officer at We Financial Group in San Francisco, CA

Investment adviser registrationUpdated

Guillaume Decalf is CEO and Chief Compliance Officer of We Financial Group LLC, an investment adviser managing $127M, and works from its San Francisco, CA office. Guillaume Decalf has been registered as an investment adviser representative through We Financial Group since 10 September 2018, has 8 years in the industry across 1 firm and has passed the Series 65.

8
Years in industry
8
Years at firm
1
Adviser firms
9
States registered

From the IAPD record, checked 22 October 2026SEC record

Career

Guillaume Decalf has been CEO and Chief Compliance Officer of We Financial Group since April 2018, is a control person of the firm and directly owns 75% or more of it.

We Financial Group LLC is a San Francisco, CA firm with $127M under management, 140 clients and 4 advisers in one office, as of its April 2026 filing.

Guillaume Decalf is CEO of We Financial Group. Decalf began a career in France in 2003 as a consultant specializing in process analysis and optimization, and from 2010 worked in San Francisco at technology companies including Amazon and Fitbit. Decalf launched Oui Financial, a financial planning and investment firm, in 2018.

  1. – present · 8 years
    San Francisco, CA · Adviser representative · Firm CRD 298549

Credentials and registrations

Investment adviser representative registrations

Guillaume Decalf is registered as an investment adviser representative in 9 states. The first approvals date from September 2018; the most recent is Pennsylvania, in February 2024.

  • CaliforniaSince 10 September 2018
  • IllinoisSince 11 July 2022
  • MassachusettsSince 26 September 2022
  • New JerseySince 4 June 2021
  • New YorkSince 19 August 2021
  • North CarolinaSince 23 August 2023
  • PennsylvaniaSince 8 February 2024
  • TexasSince 8 November 2019
  • WashingtonSince 18 March 2022

Examinations

Series 656 August 2018
Name
Uniform Investment Adviser Law Examination

Key facts

Full name
Guillaume Maxime Henri Decalf
CRD
7003690
Firm
We Financial Group · CRD 298549
Role
CEO and Chief Compliance Officer
Office
447 SUTTER ST, SUITE 506 - 1493, San Francisco, CA 94108
Registration
Investment adviser registration
In the industry since
September 2018
Disciplinary history
Not yet shown here · SEC record

Common questions

Where does Guillaume Decalf work?

Guillaume Decalf has been CEO and Chief Compliance Officer of We Financial Group LLC since April 2018, and is a control person of the firm.

Source: Form ADV, Schedule A, filed 16 April 2026

Is Guillaume Decalf a financial advisor?

Yes. Guillaume Decalf has a current investment-adviser registration in California, Illinois, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, Texas and Washington, through We Financial Group since September 2018.

Source: IAPD individual record, checked 22 October 2026

How many years of experience does Guillaume Decalf have?

Guillaume Decalf has 8 years in the financial industry, since September 2018, across 1 adviser firm.

Source: IAPD individual record, checked 22 October 2026

What exams has Guillaume Decalf passed?

Guillaume Decalf passed the Series 65 in August 2018.

Source: IAPD individual record, checked 22 October 2026

Where is Guillaume Decalf based?

Guillaume Decalf’s registered office is in San Francisco, CA.

Source: IAPD individual record, checked 22 October 2026

Is Guillaume Decalf registered with FINRA?

No. Guillaume Decalf has no current broker registration.

Source: IAPD individual record, checked 22 October 2026

How can I verify Guillaume Decalf’s record?

Search CRD 7003690 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Guillaume Decalf’s full registration record.

Source: IAPD individual record, checked 22 October 2026

Sources

  1. IAPD individual record, CRD 7003690, checked 22 October 2026. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of We Financial Group LLC, filed 16 April 2026. Title, control and ownership bands.
  3. We Financial Group team page. Biography, education, credentials, awards and the portrait, reproduced for identification.