# Calamos Advisors LLC

> Calamos Advisors LLC is an SEC-registered investment advisory firm in Naperville, IL, registered since 1987, reporting over $5 billion in regulatory assets under management in its Form ADV filing dated July 23, 2026.

- CRD: 105758
- Filed as: CALAMOS ADVISORS LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Naperville, IL
- Filing period: October 2026
- Form ADV filing dated: July 23, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/105758
- AdvisorCensus page: https://advisorcensus.com/firm/calamos-advisors-llc-naperville-il-105758

## Quick answers

**How is Calamos Advisors LLC compensated?**
On its Form ADV (Item 5.E, October 2026), Calamos Advisors LLC reports these compensation arrangements: a percentage of assets under its management.

**Where is Calamos Advisors LLC located?**
Calamos Advisors LLC's principal office is in Naperville, IL, according to its Form ADV; the August 2026 filing also lists 5 other offices (Schedule D, Section 1.F).

**Is Calamos Advisors LLC registered with the SEC or a state?**
Calamos Advisors LLC is an SEC-registered investment advisory firm, registered since 1987. Status as filed: Approved. CRD 105758.

**How much does Calamos Advisors LLC manage?**
Calamos Advisors LLC reports $43,888,328,733 in regulatory assets under management in its Form ADV filing dated July 23, 2026 (100% discretionary).

**How have Calamos Advisors LLC's assets and staff changed since 2021?**
In the Form ADV data for Calamos Advisors LLC: Regulatory assets under management: $31,143,220,906 in the October 2021 data and $43,888,328,733 in the October 2026 data, up 41%. Total employees: 219 in October 2021 and 300 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Calamos Advisors LLC serve?**
By number of clients on Form ADV Item 5.D: high net worth individuals (1,372); individuals (other than high net worth individuals) (364); investment companies (74).

**Which custodians does Calamos Advisors LLC use?**
Calamos Advisors LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists National Financial Services LLC and U.S. Bank National Association as custodians holding 10% or more of its separately managed account assets.

**Does Calamos Advisors LLC report any disciplinary disclosures?**
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/105758

**What changed in Calamos Advisors LLC's recent Form ADV filings?**
In the August 2026 filing data: Updated its list of owners and control persons (Schedule A).

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management

### Custodians (Schedule D, Section 5.K(3))
- National Financial Services LLC
- U.S. Bank National Association

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

### Regulatory assets under management (Item 5.F)
- Total: $43,888,328,733
- Discretionary: $43,888,328,733
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Individuals (other than high net worth individuals) | 364 | $369,549,705 |
| High net worth individuals | 1,372 | $1,530,765,177 |
| Banking or thrift institutions | 0 | $0 |
| Investment companies | 74 | $39,998,204,898 |
| Business development companies | 0 | $0 |
| Pooled investment vehicles (other than investment companies and business development companies) | 0 | $0 |
| Pension and profit sharing plans (but not the plan participants or government pension plans) | 41 | $426,754,688 |
| Charitable organizations | 24 | $75,868,698 |
| State or municipal government entities (including government pension plans) | 4 | $49,456,713 |
| Other investment advisers | 0 | $0 |
| Insurance companies | 8 | $882,853,702 |
| Sovereign wealth funds and foreign official institutions | 0 | $0 |
| Corporations or other businesses not listed above | 70 | $554,875,152 |
| Other | 0 | $0 |

### Advisory services (Item 5.G)
- Portfolio management for individuals and/or small businesses
- Portfolio management for investment companies (and business development companies)
- Portfolio management for pooled investment vehicles (other than investment companies)
- Portfolio management for businesses (other than small businesses) or institutional clients

### Firm details
- Registered since: 1987 (39 years)
- Employees: 300 total, 114 performing advisory functions
- Wrap fee program participation: Yes
- States registered or notice-filed: AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Other offices (Schedule D, Section 1.F), as of the August 2026 filing
- Chicago, IL
- Milwaukee, WI
- New York, NY
- Portland, OR
- San Francisco, CA

### Websites listed on Form ADV (Item 1.I)
- calamos.com
- soundcloud.com/CALAMOSINVESTMENTS
- Facebook @CALAMOS
- Instagram @BUY_NOW_CALAMOS
- Instagram @CALAMOS_INVESTMENTS
- LinkedIn @CALAMOS-INVESTMENTS
- X @CALAMOS
- YouTube @CALAMOS

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $31,143,220,906 | 219 | September 23, 2021 |
| October 2022 | $41,993,109,481 | 228 | March 29, 2022 |
| October 2023 | $33,763,270,463 | 229 | August 23, 2023 |
| October 2024 | $33,716,889,937 | 243 | March 22, 2024 |
| October 2025 | $38,184,222,669 | 257 | June 5, 2025 |
| October 2026 | $43,888,328,733 | 300 | July 23, 2026 |

Regulatory assets under management: $31,143,220,906 in the October 2021 data and $43,888,328,733 in the October 2026 data, up 41%.
Total employees: 219 in October 2021 and 300 in October 2026.

## Changes in the filing (last 12 months)

### August 2026
- Updated its list of owners and control persons (Schedule A).

### May 2026
- Updated its list of owners and control persons (Schedule A).

### April 2026
- Employees performing advisory functions went from 106 to 114.
- Regulatory assets under management went from $38,184,222,669 to $43,888,328,733 (+15%).
- Updated its list of owners and control persons (Schedule A).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Calamos Advisors LLC (CRD 105758): Form ADV filing data as of October 2026.