Asset manager · Naperville, IL
Cgam
Calamos Antetokounmpo Asset Management LLC · SEC-registered investment adviser · CRD 322813 · SEC 801-126711
At a glance
Cgam is an SEC-registered investment adviser based in Naperville, Illinois, with $27 million in regulatory assets under management as of its Form ADV filed July 23, 2026. Its largest client group by assets is investment companies. By Form ADV it is a asset manager, ranked 2,494th of 3,218 asset managers and 16,155th of 17,210 SEC-registered advisers by assets.
Main office 630-245-7200calamos.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $27M
- Rank among asset managers
- #2,494 of 3,218
- Rank among all SEC RIAs
- #16,155 of 17,210
- Rank in Illinois
- #649 of 684
- Clients
- 3
- Accounts
- 3
- Discretionary
- 100% of AUM
- Employees
- 17
- Advisory staff
- 4
- Offices
- 4
Owners and executives on its Form ADV
- John P. Calamos Sr.Global Chief Investment Officer
- John S. KoudounisDirector, Chairman and Chief Executive Officer
- Thomas E. HermanChief Financial Officer and Treasurer
- Daniel L. DufresnePresident
- Constance E Stavropoulos PalasChief Compliance Officer
- Giannis S. AntetokounmpoDirector
- John H. SianisDirector
- Christopher S. RussellSecretary
- Erik D. OjalaChief Legal Officer
- Dylan R. WondraDirector
Custody and brokerage
Custodian
Cgam’s Form ADV lists no custodian for separately managed accounts. Firms report one only when they manage $10 million or more in those accounts.
Broker-dealer
Hybrid RIA
Cgam is a hybrid RIA: 10 of its employees are also registered representatives of a broker-dealer. It names an affiliated broker-dealer: Calamos Financial Services LLC.
- Calamos Financial Services LLC ↗CRD 19850
It doesn’t hold client accounts or customer funds itself. Its annual audited report filed with the SEC, February 2026
Its Form ADV brochure (filed March 2026) names Calamos Financial Services as the broker-dealer its advisers are registered with.
CGAM supervised persons, and related sales personnel, are also associated with Calamos Financial Services LLC (“CFS”), an affiliated limited purpose broker-dealer, and in that capacity engage in marketing or selling activities with respect
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Investment companies | 3 | $27M | 100% |
Disciplinary disclosures
Cgam reports no disciplinary disclosures in Item 11 of Form ADV. Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for investment companies
How it’s paid
- A percentage of assets under management
Form ADV and brochures on the SEC’s adviser search ↗calamos.com ↗
AtlasMembers
The full record on Cgam
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, 3 years of filings
- Locked
- Growth over one, three and five years
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- Rank against 161 peers of its type and size
- Locked
- Owners and executives, with titles and stakes
- 10 namedLocked
- Main office, fax and compliance officer
- Locked
- Filing changes this year, with alerts
- 1Locked
Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Cgam manage?
Cgam reports $27 million in regulatory assets under management across 3 accounts, 100% of it on a discretionary basis, on its Form ADV filed July 23, 2026.
What kind of firm is Cgam?
Cgam is a asset manager by its Form ADV answers. Most of its assets are managed for funds, institutions or other businesses rather than individuals.
Who are Cgam’s clients?
By assets, its largest client types are investment companies ($27 million, 3 clients).
Does Cgam have any disciplinary history?
Cgam reports no disciplinary disclosures in Item 11 of its Form ADV. Check the SEC’s adviser search for the latest record.
Where these numbers come from
Every figure is Cgam’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-07-23), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →