Role at Calamos Advisors
- Title on Schedule A
- Founder, Chairman and Global CIO
- Control
- John Calamos Sr. is a control person of Calamos Advisors.
- Ownership
- An individual ownership band is not available in the source record.
- Tenure
- John Calamos Sr. has held the filed role since October 2004.
The firm
Form ADV filed 23 July 2026
Career on record
John Calamos Sr. has been registered through Calamos Advisors since January 2015.
- Passed Series 27, Series 53, Series 24, Series 99TO, Series 7TO and Series 52TO · 2023
- Passed SIE · 2018
- Calamos Wealth Management LLCCurrent– present · 12 yearsNaperville, IL · Adviser representative · Firm CRD 143490
- Calamos Advisors LLCCurrent– present · 12 yearsNaperville, IL · Adviser representative · Firm CRD 105758
- Passed Series 65 and Series 63 · 1993
- Passed F04 and Series 4 · 1977
- Passed Series 40 · 1976
- Passed Series 1 · 1971
Registrations and exams
John Calamos Sr. has a current investment-adviser registration in Illinois and has passed 13 qualifying exams.
| State | Scope | Status | Since |
|---|---|---|---|
| Illinois | Investment adviser representative | Approved | 6 January 2015 |
- Scope
- Investment adviser representative
- Status
- Approved
Examinations
| Exam | Name | Passed |
|---|---|---|
| Series 65 | Uniform Investment Adviser Law Examination | 7 January 1993 |
| Series 63 | Uniform Securities Agent State Law Examination | 7 January 1993 |
| Series 27 | Financial and Operations Principal Examination | 2 January 2023 |
| Series 53 | Municipal Securities Principal Examination | 2 January 2023 |
| Series 24 | General Securities Principal Examination | 2 January 2023 |
| Series 4 | Registered Options Principal Examination | 13 September 1977 |
| F04 | Financial Principal Examination | 6 April 1977 |
| Series 40 | Registered Principal Examination | 29 December 1976 |
| Series 99TO | Operations Professional Examination | 2 January 2023 |
| Series 7TO | General Securities Representative Examination | 2 January 2023 |
| Series 52TO | Municipal Securities Representative Examination | 2 January 2023 |
| SIE | Securities Industry Essentials Examination | 1 October 2018 |
| Series 1 | Registered Representative Examination | 19 November 1971 |
- Name
- Uniform Investment Adviser Law Examination
- Name
- Uniform Securities Agent State Law Examination
- Name
- Financial and Operations Principal Examination
- Name
- Municipal Securities Principal Examination
- Name
- General Securities Principal Examination
- Name
- Registered Options Principal Examination
- Name
- Financial Principal Examination
- Name
- Registered Principal Examination
- Name
- Operations Professional Examination
- Name
- General Securities Representative Examination
- Name
- Municipal Securities Representative Examination
- Name
- Securities Industry Essentials Examination
- Name
- Registered Representative Examination
Individual record
- Full name
- John Peter Calamos Sr.
- CRD
- 38210
- Registration status
- Investment adviser and broker registrations
- Office
- 2020 CALAMOS COURT, Naperville, IL 60563-2787
This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. Check this record on adviserinfo.sec.gov
Common questions
Where does John Calamos Sr. work?
John Calamos Sr. has been Founder, Chairman and Global CIO of Calamos Advisors LLC since October 2004, and is a control person of the firm.
Is John Calamos Sr. a financial advisor?
Yes. John Calamos Sr. has a current investment-adviser registration in Illinois, through Calamos Advisors since January 2015, as of 17 October 2026.
How many years of experience does John Calamos Sr. have?
John Calamos Sr. has worked in the financial industry for 54 years as of 17 October 2026, counted from 30 November 1971, across 2 adviser firms.
What exams has John Calamos Sr. passed?
John Calamos Sr. has passed 13 licensing exams: the Series 1, Series 40, F04, Series 4, Series 65, Series 63, SIE, Series 27, Series 53, Series 24, Series 99TO, Series 7TO and Series 52TO. The earliest, the Series 1, was passed in November 1971.
Where is John Calamos Sr. based?
John Calamos Sr.’s registered office is in Naperville, IL.
Leadership at Calamos Advisors
- John KoudounisPresident and Chief Executive Officer
- Thomas HermanEVP, Chief Financial Officer
- Daniel DufresneEVP, Chief Operating Officer
- Walter KellySVP, Chief Compliance Officer
- Thomas KileySVP, Chief Distribution Officer
- Erik OjalaSVP General Counsel & Secretary