CIK 1455258
Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.
Firm-level facts as reported by the adviser on Form ADV Part 1A (latest filing 2026-04-30). Regulatory assets under management (RAUM) is Form ADV's gross figure and can differ from a 13F long book — it includes private-fund assets, leverage and non-13(f) securities. Titles and figures as-filed. Latest ADV filing 2026-04-30. Form ADV ↗
| Name | Title (as filed) | Since | Ownership |
|---|---|---|---|
| CALAMOS SR., JOHN, PETER | FOUNDER, CHAIRMAN & GLOBAL CO-CIO | 2004-10 | <5% ·◆ |
| Dufresne, Daniel, Leo | EVP, CHIEF OPERATING OFFICER | 2021-04 | <5% ·◆ |
| Herman, Thomas, Edward | EVP, CHIEF FINANCIAL OFFICER | 2016-06 | <5% ·◆ |
| KOUDOUNIS, JOHN, SPIRO | PRESIDENT & CHIEF EXECUTIVE OFFICER | 2016-04 | <5% ·◆ |
| Ojala, Erik, Donald | SVP, GENERAL COUNSEL & SECRETARY | 2023-07 | <5% ·◆ |
| Weidenbach, Joseph, Lawrence | SVP, HEAD OF CALAMOS WEALTH MANAGEMENT | 2022-10 | <5% ·◆ |
| Kelly, Walter, Morrissey | SVP, CHIEF COMPLIANCE OFFICER | 2026-04 | <5% |
| CALAMOS INVESTMENTS LLCentity | SOLE MEMBER/MANAGER | 2004-10 | 75%+ ·◆ |
Direct owners and executive officers as filed on the adviser's Form ADV Schedule A (as-filed titles; ADV updates annually and on material change). This lists officers and 5%+ owners — not necessarily the full portfolio-management team.
Signed this manager's latest 13F (2026-Q1). The filing's authorized signatory — frequently a compliance officer, general counsel, or CFO — not necessarily the portfolio manager or firm leadership.
| Name | Role (as filed) | Departed after | Now at (if tracked) |
|---|---|---|---|
| SINKER, JACQUELINE, ELIZABETH | SVP, CHIEF COMPLIANCE OFFICER · VP, CHIEF COMPLIANCE OFFICER | 2024-03 | — not seen at a tracked firm |
| JACKSON, JERALD, CHRISTOPHER | SVP, GENERAL COUNSEL & SECRETARY · SVP, GENERAL COUNSEL AND SECRETARY | 2023-03 | — not seen at a tracked firm |
| NADER, JOSEPH, PAUL | SVP, HEAD OF CALAMOS WEALTH MANAGEMENT | 2022-03 | — not seen at a tracked firm |
| Murphy, Jesse, Reed | SVP, CHIEF INVESTMENT OFFICER OF WEALTH MANAGENENT | 2021-09 | — not seen at a tracked firm |
| OLSEN, DEREK, MAURICE | SVP, CHIEF OF IT, OPERATIONS & CO-HEAD OF RISK · SVP, CHIEF OF IT & OPERATIONS | 2021-03 | — not seen at a tracked firm |
| BAKA, JAMES, FRANCIS | EVP, PRESIDENT OF WEALTH MANAGMENT · PRESIDENT | 2020-06 | — not seen at a tracked firm |
| KASSAB, MICHAEL, GEORGE | VP, CHIEF INVESTMENT OFFICER OF WEALTH MANAGEMENT STRATEGIES · VP, CHIEF INVESTMENT OFFICER | 2019-06 | — not seen at a tracked firm |
| NASIR, LAURA, CALAMOS | SVP, CHIEF ADMINISTRATIVE OFFICER | 2018-06 | — not seen at a tracked firm |
| BHATT, NIMISH, SANJAY | SVP, CHIEF FINANCIAL OFFICER | 2016-03 | — not seen at a tracked firm |
| MICKEY, MARK, JOHN | CHIEF COMPLIANCE OFFICER | 2015-10 | — not seen at a tracked firm |
| MAZZA, JESSICA, MARIE | VP, CHIEF COMPLIANCE OFFICER | 2015-10 | — not seen at a tracked firm |
| BLACK, GARY, DOUGLAS | EVP, GLOBAL CO-CIO | 2015-09 | Future Fund LLC |
| WATKINS, ELIZABETH, ANNE | VP, CHIEF COMPLIANCE OFFICER | 2014-03 | Crescent Grove Advisors, LLC |
| BOYNE, JAMES, JOSEPH | PRESIDENT, CHIEF OPERATING OFFICER · SENIOR EXECUTIVE VICE PRESIDENT OF DISTRIBUTION AND OPERATIONS | 2014-01 | KENNEDY CAPITAL MANAGEMENT LLC |
| CALAMOS, JOHN, PETER | EVP | 2012-10 | — not seen at a tracked firm |
| CALAMOS, NICK, PETER | SR. EXECUTIVE VICE PRESIDENT OF INVESTMENTS AND CO-CIO | 2012-03 | — not seen at a tracked firm |
Named owners/officers on a past Form ADV Schedule A who are gone from the firm's latest filing. “Departed after” is the last dated filing they appear on. A landing shows only when the destination is another SEC-registered adviser we track.
