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William Peng

Investment adviser representative at Capital Markets IQ in Sudbury, MA

Investment adviser registrationUpdated

William Peng is an investment adviser representative at Capital Markets Iq, LLC, an investment adviser managing $571M, and works from its Sudbury, MA office. William Peng has been registered through Capital Markets IQ since 6 October 2020, has 14 years in the industry across 4 firms and has passed the Series 7, Series 66 and Series 7TO.

14
Years in industry
6
Years at firm
4
Adviser firms
1
States registered

From the IAPD record, checked 24 October 2026SEC record

Career

William Peng has been an investment adviser representative at Capital Markets IQ since October 2020, and is not listed among the firm’s executive officers or direct owners.

Capital Markets Iq, LLC is a firm with $571M under management, 884 clients and 20 advisers across 19 offices, as of its July 2026 filing.

William Peng’s longest registration is the current one, 6 years at Capital Markets IQ since 2020. Before joining Capital Markets IQ in 2020, William Peng was registered through Sa Stone Investment Advisors Inc. and Quest Capital Strategies, Inc.

  1. – present · 6 years
    Sudbury, MA · Adviser representative · Firm CRD 134921
  2. Sa Stone Investment Advisors Inc.
    – · under a year
    Birmingham, AL · Adviser representative · Firm CRD 174182
  3. Quest Capital Strategies, Inc.
    – · 1 year
    Sudbury, MA · Adviser representative · Firm CRD 16783
  4. – · 1 year
    Sudbury, MA · Adviser representative · Firm CRD 134921
  5. Quest Capital Strategies, Inc.
    – · 1 year
    Sudbury, MA · Adviser representative · Firm CRD 16783
  6. Quest Capital Strategies, Inc.
    – · under a year
    Sudbury, MA · Adviser representative · Firm CRD 16783
  7. Morgan Stanley Smith Barney LLC
    – · under a year
    Boston, MA · Adviser representative · Firm CRD 149777

Credentials and registrations

Investment adviser representative registrations

William Peng is registered as an investment adviser representative in Massachusetts, since October 2020.

  • MassachusettsSince 6 October 2020

Examinations

Series 7TO14 March 2022
Name
General Securities Representative Examination
SIECredited
Name
Securities Industry Essentials Examination
Series 6629 August 2010
Name
Uniform Combined State Law Examination
Series 79 July 2010
Name
General Securities Representative Examination

Key facts

Full name
William W. Peng
CRD
5790866
Firm
Capital Markets IQ · CRD 134921
Office
Sudbury, MA
Registration
Investment adviser registration
In the industry since
July 2012
Disciplinary history
Not yet shown here · SEC record

Common questions

Where does William Peng work?

William Peng is an investment adviser representative registered through Capital Markets Iq, LLC since October 2020, and is not listed among the firm’s executive officers or direct owners.

Source: IAPD individual record, checked 24 October 2026

Is William Peng a financial advisor?

Yes. William Peng has a current investment-adviser registration in Massachusetts, through Capital Markets IQ since October 2020.

Source: IAPD individual record, checked 24 October 2026

How many years of experience does William Peng have?

William Peng has 14 years in the financial industry, since July 2012, across 4 adviser firms.

Source: IAPD individual record, checked 24 October 2026

What exams has William Peng passed?

William Peng has passed 3 licensing exams: the Series 7, Series 66 and Series 7TO. The earliest, the Series 7, was passed in July 2010. FINRA credited William Peng with the SIE, which began in October 2018.

Source: IAPD individual record, checked 24 October 2026

Where did William Peng work before Capital Markets IQ?

Before Capital Markets IQ, William Peng was registered through Sa Stone Investment Advisors Inc., December 2019 to August 2020; Quest Capital Strategies, Inc., March 2018 to December 2019; Quest Capital Strategies, Inc., March 2015 to April 2016; Quest Capital Strategies, Inc., February 2013 to December 2013; Morgan Stanley Smith Barney LLC, October 2010 to March 2011.

Source: IAPD individual record, checked 24 October 2026

Where is William Peng based?

William Peng’s registered office is in Sudbury, MA.

Source: IAPD individual record, checked 24 October 2026

Is William Peng registered with FINRA?

No. William Peng has no current broker registration.

Source: IAPD individual record, checked 24 October 2026

How can I verify William Peng’s record?

Search CRD 5790866 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes William Peng’s full registration record.

Source: IAPD individual record, checked 24 October 2026

Leadership at Capital Markets IQ

Sources

  1. IAPD individual record, CRD 5790866, checked 24 October 2026. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of Capital Markets Iq, LLC, filed 28 July 2026. Executive officers and direct owners; this person is not among them.