Assets under management Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Total AUM
Total Accounts
10Y AUM Change
Private Funds
Private funds reported by Calamos Advisors LLC
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Employee Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Total Employees
Clients per Employee
10Y Employee Change
Historical AUM and employee figures reflect available SEC Form ADV filings under this CRD. Filing gaps may reflect registration status changes, dormant periods, state registration periods, firm restructuring, or other reporting changes. Rialytix does not interpolate missing periods.
Ownership
Reported direct and indirect ownership ranges
Each range applies to a separate reported relationship and should not be added together.
Reported ownership ranges
Highlighted bands show the percentage range reported in Form ADV.
0%25%50%75%100%
CALAMOS INVESTMENTS LLCDirect owner · Schedule AInterest in CALAMOS ADVISORS LLC
75%+
JOHN PETER CALAMOS SR.Indirect owner · Schedule BInterest in JOHN P. CALAMOS, TRUSTEE, UNDER THE JOHN P. CALAMOS 1985 TRUST
75%+
JOHN P. CALAMOS, TRUSTEE, UNDER THE JOHN P. CALAMOS 1985 TRUSTIndirect owner · Schedule BInterest in CALAMOS FAMILY PARTNERS, INC.
75%+
CALAMOS PARTNERS LLCIndirect owner · Schedule BInterest in CALAMOS INVESTMENTS LLC
75%+
JOHN PETER CALAMOS SR.Indirect owner · Schedule BInterest in JOHN P. CALAMOS QTIP TRUST
75%+
JOHN P. CALAMOS QTIP TRUSTIndirect owner · Schedule BInterest in CALAMOS PARTNERS LLC
75%+
JOHN SPIRO KOUDOUNISIndirect owner · Schedule BInterest in CALAMOS EQUITY PARTNERS LLC
75%+
JOHN P. CALAMOS QTIP TRUSTIndirect owner · Schedule BInterest in CALAMOS ASSET MANAGEMENT, INC.
50% to < 75%
JOHN SPIRO KOUDOUNISIndirect owner · Schedule BInterest in CALAMOS ASSET MANAGEMENT, INC.
25% to < 50%
Bars represent the reported range at that individual ownership step, not an estimated percentage of the advisory firm. Indirect relationships may refer to intermediate entities rather than directly to Calamos Advisors LLC.
Reported ownership and control details
Form ADV · Filing date 2026-07-23 · Schedules A and B
| # | Owner / person & role | Interest in entity | Reported interest | Control person | Title / status acquired | Source |
|---|---|---|---|---|---|---|
| 1 | JOHN PETER CALAMOS SR.FOUNDER, CHAIRMAN AND GLOBAL CIOIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | FOUNDER, CHAIRMAN AND GLOBAL CIO10/2004 | Schedule APDF page 55 |
| 2 | CALAMOS INVESTMENTS LLCSOLE MEMBER/MANAGERDomestic entity | CALAMOS ADVISORS LLC | 75% or moreCode E | Yes | SOLE MEMBER/MANAGER10/2004 | Schedule APDF page 55 |
| 3 | JOHN SPIRO KOUDOUNISPRESIDENT AND CHIEF EXECUTIVE OFFICERIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | PRESIDENT AND CHIEF EXECUTIVE OFFICER03/2016 | Schedule APDF page 55 |
| 4 | Thomas Edward HermanEVP, CHIEF FINANCIAL OFFICERIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | EVP, CHIEF FINANCIAL OFFICER06/2016 | Schedule APDF page 55 |
| 5 | Daniel Leo DufresneEVP, CHIEF OPERATING OFFICERIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | EVP, CHIEF OPERATING OFFICER04/2021 | Schedule APDF page 56 |
| 6 | Erik Donald OjalaSVP GENERAL COUNSEL & SECRETARYIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | SVP GENERAL COUNSEL & SECRETARY07/2023 | Schedule APDF page 56 |
| 7 | Thomas Patrick KileySVP, CHIEF DISTRIBUTION OFFICERIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | Yes | SVP, CHIEF DISTRIBUTION OFFICER11/2024 | Schedule APDF page 56 |
| 8 | Walter Morrissey KellySVP, CHIEF COMPLIANCE OFFICERIndividual | CALAMOS ADVISORS LLC | Less than 5%Code NA | No | SVP, CHIEF COMPLIANCE OFFICER04/2026 | Schedule APDF page 56 |
| 9 | JOHN PETER CALAMOS SR.TRUSTEE AND SHAREHOLDERIndividual | JOHN P. CALAMOS, TRUSTEE, UNDER THE JOHN P. CALAMOS 1985 TRUST | 75% or moreCode E | Yes | TRUSTEE AND SHAREHOLDER08/1985 | Schedule BPDF page 56 |
| 10 | JOHN P. CALAMOS, TRUSTEE, UNDER THE JOHN P. CALAMOS 1985 TRUSTSHAREHOLDERDomestic entity | CALAMOS FAMILY PARTNERS, INC. | 75% or moreCode E | Yes | SHAREHOLDER10/2004 | Schedule BPDF page 56 |
| 11 | CALAMOS PARTNERS LLCSOLE MANAGER/MEMBERDomestic entity | CALAMOS INVESTMENTS LLC | 75% or moreCode E | Yes | SOLE MANAGER/MEMBER07/2016 | Schedule BPDF page 56 |
| 12 | CALAMOS ASSET MANAGEMENT, INC.MEMBERDomestic entity | CALAMOS INVESTMENTS LLC | Percentage not specifiedCode F | Yes | MEMBER10/2004 | Schedule BPDF page 56 |
| 13 | CALAMOS FAMILY PARTNERS, INC.MEMBERDomestic entity | CALAMOS PARTNERS LLC | Percentage not specifiedCode F | Yes | MEMBER09/2014 | Schedule BPDF page 56 |
| 14 | JOHN PETER CALAMOS SR.MANAGERIndividual | CALAMOS PARTNERS LLC | Percentage not specifiedCode F | Yes | MANAGER07/2016 | Schedule BPDF page 56 |
| 15 | JOHN SPIRO KOUDOUNISMANAGER AND SHAREHOLDERIndividual | CALAMOS PARTNERS LLC | Percentage not specifiedCode F | Yes | MANAGER AND SHAREHOLDER07/2016 | Schedule BPDF page 56 |
| 16 | WILLIAM J TAKAHASHIMANAGERIndividual | CALAMOS PARTNERS LLC | Percentage not specifiedCode F | Yes | MANAGER07/2016 | Schedule BPDF page 56 |
| 17 | JOHN SPIRO KOUDOUNISSHAREHOLDERIndividual | CALAMOS ASSET MANAGEMENT, INC. | 25% to less than 50%Code C | Yes | SHAREHOLDER12/2020 | Schedule BPDF page 56 |
| 18 | JOHN P. CALAMOS QTIP TRUSTSHAREHOLDERDomestic entity | CALAMOS ASSET MANAGEMENT, INC. | 50% to less than 75%Code D | Yes | SHAREHOLDER06/2026 | Schedule BPDF page 56 |
| 19 | JOHN PETER CALAMOS SR.TRUSTEE AND SHAREHOLDERIndividual | JOHN P. CALAMOS QTIP TRUST | 75% or moreCode E | Yes | TRUSTEE AND SHAREHOLDER06/2026 | Schedule BPDF page 56 |
| 20 | JOHN P. CALAMOS QTIP TRUSTSHAREHOLDERDomestic entity | CALAMOS PARTNERS LLC | 75% or moreCode E | Yes | SHAREHOLDER06/2026 | Schedule BPDF page 56 |
| 21 | CALAMOS EQUITY PARTNERS LLCMEMBERDomestic entity | CALAMOS INVESTMENTS LLC | Percentage not specifiedCode F | Yes | MEMBER06/2026 | Schedule BPDF page 56 |
| 22 | JOHN SPIRO KOUDOUNISMEMBERIndividual | CALAMOS EQUITY PARTNERS LLC | 75% or moreCode E | Yes | MEMBER06/2026 | Schedule BPDF page 57 |
| 23 | Daniel Leo DufresneMEMBERIndividual | CALAMOS EQUITY PARTNERS LLC | Percentage not specifiedCode F | Yes | MEMBER06/2026 | Schedule BPDF page 57 |
Less than 5% may include zero. Code F identifies a role without specifying a percentage. Reported interests may overlap and may not include every owner. Total indirect ownership is not calculated.
Compliance & Disclosures
Filing dated 7/23/2026 6:16:46 PM
Responses were selected by the RIA in its filing. Questions are shortened for readability; “you” refers to the reporting firm, and some questions also cover advisory affiliates.
RIA or supervised-person involvementThe RIA reported that none of the events below involve the firm or its supervised persons.RIA responseNo
AFelonies2 No
In the past ten years, have you or any advisory affiliate:
- A1Been convicted of or pleaded guilty or no contest to a felony?No
- A2Been charged with a felony?No
BMisdemeanors2 No
In the past ten years, have you or any advisory affiliate:
- B1Been convicted of or pleaded guilty or no contest to a misdemeanor involving investments, an investment-related business, fraud, false statements or omissions, wrongful taking of property, bribery, perjury, forgery, counterfeiting, or extortion?No
- B2Been charged with a misdemeanor of the kind listed above?No
CSEC or CFTC actions5 No
Has the SEC or CFTC ever:
- C1Found you or an advisory affiliate made a false statement or omission?No
- C2Found you or an advisory affiliate violated SEC or CFTC regulations or statutes?No
- C3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
- C4Entered an order against you or an advisory affiliate in connection with investment-related activity?No
- C5Imposed a civil money penalty on you or an advisory affiliate, or ordered you or an advisory affiliate to cease and desist from any activity?No
DOther regulatory actions5 No
Has any other federal regulatory agency, state regulatory agency, or foreign financial regulatory authority ever:
- D1Found you or an advisory affiliate made a false statement or omission, or was dishonest, unfair, or unethical?No
- D2Found you or an advisory affiliate violated investment-related regulations or statutes?No
- D3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
- D4In the past ten years, entered an order against you or an advisory affiliate in connection with investment-related activity?No
- D5Denied, suspended, or revoked your or an advisory affiliate’s registration or license, or otherwise prevented association with an investment-related business or restricted activities?No
ESelf-regulatory organization actions4 No
Has a self-regulatory organization or commodities exchange ever:
- E1Found you or an advisory affiliate made a false statement or omission?No
- E2Found you or an advisory affiliate violated its rules, other than a violation designated as a minor rule violation under an SEC-approved plan?No
- E3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
- E4Disciplined you or an advisory affiliate by expulsion, suspension, barring association with other members, or otherwise restricting activities?No
FProfessional authorizations1 No
- FHas an authorization to act as an attorney, accountant, or federal contractor granted to you or an advisory affiliate ever been revoked or suspended?No
GPending regulatory proceedings1 No
- GAre you or any advisory affiliate now the subject of a regulatory proceeding that could result in a “Yes” answer to any part of C, D, or E?No
HCivil judicial actions and proceedings4 No
(1) Court actions
Has a domestic or foreign court:
- H(1)(a)In the past ten years, enjoined you or an advisory affiliate in connection with investment-related activity?No
- H(1)(b)Found that you or an advisory affiliate violated investment-related statutes or regulations?No
- H(1)(c)Dismissed, pursuant to a settlement agreement, an investment-related civil action brought against you or an advisory affiliate by a state or foreign financial regulatory authority?No
(2) Pending civil proceedings
- H(2)Are you or any advisory affiliate now the subject of a civil proceeding that could result in a “Yes” answer to any part of H(1)?No
* Metrics are based on the latest available data, including Form ADV filings, brochures, and relationship summaries pulled from the SEC IAPD, and may be subject to change. Learn what is included in the Rialytix data. Please refer to the firm's official disclosures for the most accurate information using their CRD number. This is not investment advice.