Largest positions
| Issuer | Class | Value | Share |
|---|---|---|---|
| Nvidia CorporationCOM | COM | $1,412,610,189 | 4.7% |
| Apple Inc.COM | COM | $1,135,893,965 | 3.8% |
| Calamos ETF TRTAX AWA COLL ETF | TAX AWA COLL ETF | $1,077,880,003 | 3.6% |
| Western Digital Corp.NOTE 3.000%11/1 | NOTE 3.000%11/1 | $825,099,042 | 2.7% |
| State Str SPDR S&P 500 ETF T (put option)TR UNIT | TR UNIT | $810,843,912 | 2.7% |
| Microsoft Corp.COM | COM | $762,840,075 | 2.5% |
| Alphabet Inc.CAP STK CL A | CAP STK CL A | $721,696,922 | 2.4% |
| Amazon Com Inc.COM | COM | $713,017,944 | 2.4% |
| State Str SPDR S&P 500 ETF T (call option)TR UNIT | TR UNIT | $554,935,122 | 1.8% |
| Broadcom Inc.COM | COM | $519,259,683 | 1.7% |
| Meta Platforms Inc.CL A | CL A | $370,432,460 | 1.2% |
| Micron Technology Inc.COM | COM | $361,816,818 | 1.2% |
| Eli Lilly & COCOM | COM | $339,439,889 | 1.1% |
| Alphabet Inc.CAP STK CL C | CAP STK CL C | $320,545,216 | 1.1% |
| Advanced Micro Devices Inc.COM | COM | $314,138,701 | 1.0% |
| Tesla Inc.COM | COM | $313,952,664 | 1.0% |
| Alphabet Inc.DEP SHS RP1/20 A | DEP SHS RP1/20 A | $237,293,709 | 0.8% |
| Alphabet Inc.DEP SHS RP1/20 B | DEP SHS RP1/20 B | $232,178,160 | 0.8% |
| JPMORGAN Chase & COCOM | COM | $231,875,335 | 0.8% |
| Visa Inc.COM CL A | COM CL A | $226,942,713 | 0.8% |
| Alibaba Group Hldg LtdNOTE 0.500% 6/0 | NOTE 0.500% 6/0 | $223,223,388 | 0.7% |
| Applied Matls Inc.COM | COM | $219,354,585 | 0.7% |
| Invesco Qqq TR (put option)UNIT SER 1 | UNIT SER 1 | $197,164,688 | 0.7% |
| Boeing CODEP CONV PFD A | DEP CONV PFD A | $185,409,145 | 0.6% |
| Hewlett Packard Enterprise C7.625 MAND CONV | 7.625 MAND CONV | $183,512,170 | 0.6% |
| Oracle Corp.6.5 DEP CUM SR D | 6.5 DEP CUM SR D | $178,757,340 | 0.6% |
| Intel Corp.COM | COM | $177,093,427 | 0.6% |
| iShares TR (call option)MSCI EAFE ETF | MSCI EAFE ETF | $168,034,900 | 0.6% |
| Goldman Sachs Group Inc.COM | COM | $167,595,134 | 0.6% |
| Johnson & JohnsonCOM | COM | $164,374,971 | 0.5% |
| Caterpillar Inc.COM | COM | $160,012,939 | 0.5% |
| Lam Research Corp.COM NEW | COM NEW | $158,353,949 | 0.5% |
| Exxon Mobil Corp.COM | COM | $155,295,600 | 0.5% |
| Walmart Inc.COM | COM | $154,367,830 | 0.5% |
| Mks Inc..NOTE 1.250% 6/0 | NOTE 1.250% 6/0 | $149,859,615 | 0.5% |
| Snowflake Inc.NOTE 10/0 | NOTE 10/0 | $148,396,486 | 0.5% |
| ON Semiconductor Corp.NOTE 0.500% 3/0 | NOTE 0.500% 3/0 | $147,703,593 | 0.5% |
| GE Vernova Inc.COM | COM | $145,278,488 | 0.5% |
| Cisco Sys Inc.COM | COM | $138,475,238 | 0.5% |
| Unitedhealth Group Inc.COM | COM | $128,587,194 | 0.4% |
| Doordash Inc.NOTE 5/1 | NOTE 5/1 | $126,423,024 | 0.4% |
| Berkshire Hathaway Inc. DelCL B NEW | CL B NEW | $126,313,448 | 0.4% |
| Bank OF Amer Corp.COM | COM | $125,769,789 | 0.4% |
| Mastercard IncorporatedCL A | CL A | $122,729,856 | 0.4% |
| Cloudflare Inc.NOTE 6/1 | NOTE 6/1 | $121,043,761 | 0.4% |
| Cyberark Software LtdNOTE 6/1 | NOTE 6/1 | $120,745,235 | 0.4% |
| Akamai Technologies Inc.NOTE 0.250% 5/1 | NOTE 0.250% 5/1 | $114,262,913 | 0.4% |
| Wells Fargo & COCOM | COM | $112,898,884 | 0.4% |
| Microchip Technology Inc..DEP SHS REPSTG | DEP SHS REPSTG | $111,891,814 | 0.4% |
| PPL Corp.UNIT 02/15/2029 | UNIT 02/15/2029 | $109,729,549 | 0.4% |
Nvidia CorporationCOM$1,412,610,189
- Class
- COM
- Share
- 4.7%
Apple Inc.COM$1,135,893,965
- Class
- COM
- Share
- 3.8%
Calamos ETF TRTAX AWA COLL ETF$1,077,880,003
- Class
- TAX AWA COLL ETF
- Share
- 3.6%
Western Digital Corp.NOTE 3.000%11/1$825,099,042
- Class
- NOTE 3.000%11/1
- Share
- 2.7%
State Str SPDR S&P 500 ETF T (put option)TR UNIT$810,843,912
- Class
- TR UNIT
- Share
- 2.7%
Microsoft Corp.COM$762,840,075
- Class
- COM
- Share
- 2.5%
Alphabet Inc.CAP STK CL A$721,696,922
- Class
- CAP STK CL A
- Share
- 2.4%
Amazon Com Inc.COM$713,017,944
- Class
- COM
- Share
- 2.4%
State Str SPDR S&P 500 ETF T (call option)TR UNIT$554,935,122
- Class
- TR UNIT
- Share
- 1.8%
Broadcom Inc.COM$519,259,683
- Class
- COM
- Share
- 1.7%
Meta Platforms Inc.CL A$370,432,460
- Class
- CL A
- Share
- 1.2%
Micron Technology Inc.COM$361,816,818
- Class
- COM
- Share
- 1.2%
Eli Lilly & COCOM$339,439,889
- Class
- COM
- Share
- 1.1%
Alphabet Inc.CAP STK CL C$320,545,216
- Class
- CAP STK CL C
- Share
- 1.1%
Advanced Micro Devices Inc.COM$314,138,701
- Class
- COM
- Share
- 1.0%
Tesla Inc.COM$313,952,664
- Class
- COM
- Share
- 1.0%
Alphabet Inc.DEP SHS RP1/20 A$237,293,709
- Class
- DEP SHS RP1/20 A
- Share
- 0.8%
Alphabet Inc.DEP SHS RP1/20 B$232,178,160
- Class
- DEP SHS RP1/20 B
- Share
- 0.8%
JPMORGAN Chase & COCOM$231,875,335
- Class
- COM
- Share
- 0.8%
Visa Inc.COM CL A$226,942,713
- Class
- COM CL A
- Share
- 0.8%
Alibaba Group Hldg LtdNOTE 0.500% 6/0$223,223,388
- Class
- NOTE 0.500% 6/0
- Share
- 0.7%
Applied Matls Inc.COM$219,354,585
- Class
- COM
- Share
- 0.7%
Invesco Qqq TR (put option)UNIT SER 1$197,164,688
- Class
- UNIT SER 1
- Share
- 0.7%
Boeing CODEP CONV PFD A$185,409,145
- Class
- DEP CONV PFD A
- Share
- 0.6%
Hewlett Packard Enterprise C7.625 MAND CONV$183,512,170
- Class
- 7.625 MAND CONV
- Share
- 0.6%
Oracle Corp.6.5 DEP CUM SR D$178,757,340
- Class
- 6.5 DEP CUM SR D
- Share
- 0.6%
Intel Corp.COM$177,093,427
- Class
- COM
- Share
- 0.6%
iShares TR (call option)MSCI EAFE ETF$168,034,900
- Class
- MSCI EAFE ETF
- Share
- 0.6%
Goldman Sachs Group Inc.COM$167,595,134
- Class
- COM
- Share
- 0.6%
Johnson & JohnsonCOM$164,374,971
- Class
- COM
- Share
- 0.5%
Caterpillar Inc.COM$160,012,939
- Class
- COM
- Share
- 0.5%
Lam Research Corp.COM NEW$158,353,949
- Class
- COM NEW
- Share
- 0.5%
Exxon Mobil Corp.COM$155,295,600
- Class
- COM
- Share
- 0.5%
Walmart Inc.COM$154,367,830
- Class
- COM
- Share
- 0.5%
Mks Inc..NOTE 1.250% 6/0$149,859,615
- Class
- NOTE 1.250% 6/0
- Share
- 0.5%
Snowflake Inc.NOTE 10/0$148,396,486
- Class
- NOTE 10/0
- Share
- 0.5%
ON Semiconductor Corp.NOTE 0.500% 3/0$147,703,593
- Class
- NOTE 0.500% 3/0
- Share
- 0.5%
GE Vernova Inc.COM$145,278,488
- Class
- COM
- Share
- 0.5%
Cisco Sys Inc.COM$138,475,238
- Class
- COM
- Share
- 0.5%
Unitedhealth Group Inc.COM$128,587,194
- Class
- COM
- Share
- 0.4%
Doordash Inc.NOTE 5/1$126,423,024
- Class
- NOTE 5/1
- Share
- 0.4%
Berkshire Hathaway Inc. DelCL B NEW$126,313,448
- Class
- CL B NEW
- Share
- 0.4%
Bank OF Amer Corp.COM$125,769,789
- Class
- COM
- Share
- 0.4%
Mastercard IncorporatedCL A$122,729,856
- Class
- CL A
- Share
- 0.4%
Cloudflare Inc.NOTE 6/1$121,043,761
- Class
- NOTE 6/1
- Share
- 0.4%
Cyberark Software LtdNOTE 6/1$120,745,235
- Class
- NOTE 6/1
- Share
- 0.4%
Akamai Technologies Inc.NOTE 0.250% 5/1$114,262,913
- Class
- NOTE 0.250% 5/1
- Share
- 0.4%
Wells Fargo & COCOM$112,898,884
- Class
- COM
- Share
- 0.4%
Microchip Technology Inc..DEP SHS REPSTG$111,891,814
- Class
- DEP SHS REPSTG
- Share
- 0.4%
PPL Corp.UNIT 02/15/2029$109,729,549
- Class
- UNIT 02/15/2029
- Share
- 0.4%
The share class is shown on a wider screen.
The 50 largest of 980 positions by value, with holdings of the same security combined. The 200 largest are in this firm's machine-readable record. Share counts and quarter-on-quarter changes for each position are on EDGAR. View the full information table on EDGAR
This filing
- Form
- 13F-HR
- CIK
- 1316507
- File number
- 028-11166
- Options
- 30 call, 8 put
- In the 25 largest
- 41.5%
- Prior quarter
- $28,224,976,653 at 31 March 2026
- Positions opened
- 167
- Positions closed
- 383
Common questions
What are Calamos Advisors’ 13F holdings worth?
$30,069,138,419 across 980 positions for the quarter ended 30 June 2026.
What is Calamos Advisors’ largest 13F holding?
NVIDIA CORPORATION (COM) was the largest position at $1,412,610,189, or 4.7% of reported 13F value, as of 30 June 2026.
How concentrated is Calamos Advisors’ 13F portfolio?
The ten largest positions accounted for 28.4% of reported value and the twenty-five largest for 41.5%, across 980 positions as of 30 June 2026.
Does Form 13F show everything Calamos Advisors manages?
No. Form 13F covers only long positions in exchange-traded securities over which the manager has investment discretion, valued at quarter end. It excludes cash, most bonds, private funds, and any assets the firm does not have discretion over, so it is neither the firm's total assets nor any individual client's portfolio.
How often does Calamos Advisors file its 13F?
Every quarter. Managers file within 45 days of each quarter's end, so the figures are a snapshot that changes between filings. This page shows the quarter ended 30 June 2026.
Answered from this filing and the prior quarter's.