Calamos Advisors LLC
Reported US equity positions for Q1 2026 — $25.9B across 1,217 positions.
| Holding | Reported value | Share of portfolio | Shares |
|---|---|---|---|
| NVDA NVIDIA Corporation | $1.4B | 5.5% | 8,185,587 |
| AAPL Apple Inc. | $1.2B | 4.7% | 4,778,795 |
| MSFT Microsoft Corporation | $879.3M | 3.4% | 2,375,507 |
| GOOGL Alphabet Inc. | $735.6M | 2.8% | 2,558,213 |
| AMZN Amazon.com, Inc. | $709.3M | 2.7% | 3,405,860 |
| AVGO Broadcom Inc. | $511.4M | 2.0% | 1,652,420 |
| SPY State Street SPDR S&P 500 ETF Trust | $458.6M | 1.8% | 705,103 |
| META Meta Platforms, Inc. | $418.2M | 1.6% | 730,902 |
| WDC 3 11.15.28 Western Digital Corp | $398.9M | 1.5% | 55,616,000 |
| TSLA Tesla, Inc. | $312.8M | 1.2% | 841,450 |
| GOOG Alphabet Inc. - Class C Capital Stock | $287.4M | 1.1% | 1,001,871 |
| LLY Eli Lilly and Company | $283.7M | 1.1% | 308,497 |
| BABA 0.5 06.01.31 Alibaba Group Hldg LTD | $262.4M | 1.0% | 189,044,000 |
| JPM JP Morgan Chase & Co. | $236.8M | 0.9% | 804,936 |
| V Visa Inc. | $230.3M | 0.9% | 761,893 |
| XOM ExxonMobil Holdings Corporation | $217.5M | 0.8% | 1,282,150 |
| WMT Walmart Inc. | $194.8M | 0.8% | 1,567,252 |
| JNJ Johnson & Johnson | $189.0M | 0.7% | 773,100 |
| BA 6 10.15.27 Boeing Co | $185.8M | 0.7% | 2,863,092 |
| ORCL 6.5 01.15.29 D Oracle Corp | $183.8M | 0.7% | 4,083,470 |
| IVV iShares Core S&P 500 ETF | $178.4M | 0.7% | 273,147 |
| NFLX Netflix, Inc. | $167.8M | 0.6% | 1,744,967 |
| GS The Goldman Sachs Group, Inc. | $144.6M | 0.6% | 170,881 |
| CVX Chevron Corporation | $143.0M | 0.6% | 691,326 |
| WFC Wells Fargo & Company | $133.9M | 0.5% | 1,682,021 |
| GEV GE Vernova Inc. | $133.5M | 0.5% | 152,890 |
| IVW iShares S&P 500 Growth ETF | $132.2M | 0.5% | 1,168,503 |
| BRK.B Berkshire Hathaway Inc. | $131.2M | 0.5% | 273,861 |
| IVE iShares S&P 500 Value ETF | $130.7M | 0.5% | 619,118 |
| MKSI 1.25 06.01.30 Mks INC. | $129.8M | 0.5% | 78,265,000 |
| MA Mastercard Incorporated | $124.1M | 0.5% | 248,453 |
| LITE 1.5 12.15.29 Lumentum Hldgs INC | $114.8M | 0.4% | 11,387,000 |
| PPL 7 02.15.29 Ppl Corp | $114.7M | 0.4% | 2,235,357 |
| BAC Bank of America Corporation | $111.7M | 0.4% | 2,291,150 |
| G54950103 Linde PLC | $111.7M | 0.4% | 225,271 |
| MU Micron Technology, Inc. | $108.9M | 0.4% | 322,206 |
| UBER 0.875 12.01.28 2028 Uber Technologies INC | $108.8M | 0.4% | 90,006,000 |
| PLTR Palantir Technologies Inc. | $108.5M | 0.4% | 741,654 |
| HD The Home Depot, Inc. | $107.9M | 0.4% | 328,049 |
| NEE 7.375 02.15.29 Nextera Energy INC | $107.1M | 0.4% | 2,132,972 |
| SO 7.125 12.15.28 A Southern Co | $107.0M | 0.4% | 2,081,325 |
| MCHP 7.5 03.15.28 Microchip Technology INC. | $106.9M | 0.4% | 1,875,865 |
| AEIS 2.5 09.15.28 Advanced Energy Inds | $105.8M | 0.4% | 44,067,000 |
| ABBV AbbVie Inc. | $105.2M | 0.4% | 483,670 |
| AMAT Applied Materials, Inc. | $105.0M | 0.4% | 307,090 |
| ON 0.5 03.01.29 On Semiconductor Corp | $104.4M | 0.4% | 106,197,000 |
| W 3.5 11.15.28 Wayfair INC | $102.8M | 0.4% | 58,743,000 |
| RIVN 4.625 03.15.29 Rivian Automotive INC | $98.5M | 0.4% | 91,950,000 |
| PM Philip Morris International Inc | $98.0M | 0.4% | 592,924 |
| AMD Advanced Micro Devices, Inc. | $97.2M | 0.4% | 477,928 |
| RTX RTX Corporation | $97.0M | 0.4% | 503,016 |
| CAT Caterpillar, Inc. | $95.4M | 0.4% | 134,683 |
| MRK Merck & Company, Inc. Common Stock (new) | $93.5M | 0.4% | 777,663 |
| COST Costco Wholesale Corporation | $90.7M | 0.4% | 91,006 |
| CSCO Cisco Systems, Inc. | $89.9M | 0.3% | 1,158,626 |
| HPE 7.625 09.01.27 Hewlett Packard Enterprise C | $89.8M | 0.3% | 1,392,504 |
| ALB 7.25 03.01.27 Albemarle Corp | $89.7M | 0.3% | 1,247,889 |
| LRCX Lam Research Corporation | $88.3M | 0.3% | 413,151 |
| MS Morgan Stanley | $88.2M | 0.3% | 535,714 |
| DUK 4.125 04.15.26 Duke Energy Corp New | $86.5M | 0.3% | 78,473,000 |
Long US equity positions only, as filed. 13F does not cover short positions, cash, bonds or non-US listings, so this is not the whole portfolio.
What changed last quarter
| Holding | Change | Now | Was | Shares |
|---|---|---|---|---|
| NVDA NVIDIA Corporation | Add | $1.4B | $1.3B | +13% |
| AAPL Apple Inc. | Add | $1.2B | $1.1B | +20% |
| MSFT Microsoft Corporation | Add | $879.3M | $1.0B | +12% |
| GOOGL Alphabet Inc. | Add | $735.6M | $715.2M | +12% |
| AMZN Amazon.com, Inc. | Add | $709.3M | $724.9M | +8% |
| AVGO Broadcom Inc. | Add | $511.4M | $479.0M | +19% |
| SPY State Street SPDR S&P 500 ETF Trust | Add | $458.6M | $88.8M | +441% |
| META Meta Platforms, Inc. | Add | $418.2M | $437.7M | +10% |
| WDC 3 11.15.28 Western Digital Corp | Trim | $398.9M | $350.6M | -27% |
| TSLA Tesla, Inc. | Add | $312.8M | $359.1M | +5% |
| GOOG Alphabet Inc. - Class C Capital Stock | Add | $287.4M | $290.0M | +8% |
| LLY Eli Lilly and Company | Add | $283.7M | $292.9M | +13% |
| BABA 0.5 06.01.31 Alibaba Group Hldg LTD | Trim | $262.4M | $298.7M | -2% |
| JPM JP Morgan Chase & Co. | Add | $236.8M | $229.8M | +13% |
| V Visa Inc. | Add | $230.3M | $244.8M | +9% |
| XOM ExxonMobil Holdings Corporation | Add | $217.5M | $141.3M | +9% |
| WMT Walmart Inc. | Add | $194.8M | $164.8M | +6% |
| JNJ Johnson & Johnson | Add | $189.0M | $134.7M | +19% |
| BA 6 10.15.27 Boeing Co | Trim | $185.8M | $214.8M | -8% |
| NFLX Netflix, Inc. | Add | $167.8M | $150.8M | +9% |
| CVX Chevron Corporation | Add | $143.0M | $93.6M | +13% |
| WFC Wells Fargo & Company | Trim | $133.9M | $162.6M | -4% |
| GEV GE Vernova Inc. | Add | $133.5M | $86.2M | +16% |
| BRK.B Berkshire Hathaway Inc. | Add | $131.2M | $129.2M | +7% |
| MKSI 1.25 06.01.30 Mks INC. | Trim | $129.8M | $113.4M | -12% |
| MA Mastercard Incorporated | Add | $124.1M | $137.4M | +3% |
| LITE 1.5 12.15.29 Lumentum Hldgs INC | Trim | $114.8M | $65.2M | -7% |
| BAC Bank of America Corporation | Trim | $111.7M | $127.5M | -1% |
| G54950103 Linde PLC | Add | $111.7M | $84.5M | +14% |
| MU Micron Technology, Inc. | Trim | $108.9M | $113.8M | -19% |
| UBER 0.875 12.01.28 2028 Uber Technologies INC | Trim | $108.8M | $122.0M | -4% |
| PLTR Palantir Technologies Inc. | Add | $108.5M | $108.3M | +22% |
| HD The Home Depot, Inc. | Add | $107.9M | $93.2M | +21% |
| SO 7.125 12.15.28 A Southern Co | Trim | $107.0M | $125.2M | -16% |
| MCHP 7.5 03.15.28 Microchip Technology INC. | Add | $106.9M | $98.2M | +11% |
| AEIS 2.5 09.15.28 Advanced Energy Inds | Add | $105.8M | $71.4M | +1% |
| ABBV AbbVie Inc. | Add | $105.2M | $106.5M | +4% |
| AMAT Applied Materials, Inc. | Add | $105.0M | $55.7M | +42% |
| W 3.5 11.15.28 Wayfair INC | Trim | $102.8M | $141.8M | -5% |
| RIVN 4.625 03.15.29 Rivian Automotive INC | Add | $98.5M | $97.1M | +20% |
New and exited positions are only shown for managers whose entire filed portfolio fits inside the positions stored here. For a manager filing more than that, a holding leaving the stored set is indistinguishable from a holding being sold, so those are reported as adds and trims only.
What a 13F is
Any institutional manager exercising discretion over more than $100 million in US-listed equities must file a Form 13F with the SEC within 45 days of each quarter end, listing what they held on the last day of that quarter. The threshold was set in 1975 and has never been raised, so the filer population now runs to several thousand.
The four things it does not tell you
- It is stale. A filing describes positions as of quarter end and can arrive 45 days later. A manager who sold everything in week one of the new quarter files the same document as one who held.
- Long US equities only. No short positions, no cash, no bonds, no commodities, no foreign listings. A fund that looks heavily long in a 13F may be hedged in instruments that never appear.
- Not the whole firm. Assets are reported by the entity with discretion, so one manager can file under several CIKs, and the figure here is what that entity reported.
- Confidential treatment exists. A manager can apply to delay disclosing a position while building it. Those holdings appear later, if at all.
Why the biggest filers are not the interesting ones
The largest managers by reported value are index providers — they hold nearly everything, in proportion to the indices they track, because clients asked them to. Reading their filings for conviction is a category error. The filings worth attention are concentrated ones, where a small number of positions make up most of the portfolio, since that reflects a decision rather than a mandate.
The share-of-portfolio column is the one to read for this. A position that is 15% of a fund says something; the same dollar amount at 0.2% of an index tracker does not.
Where this comes from
The SEC's own quarterly Form 13F structured data sets, parsed here rather than bought from a vendor. Holdings are identified in the filings by CUSIP, and the mapping from CUSIP to ticker is the awkward part — that identifier is licensed rather than public, so the mapping is resolved through OpenFIGI and built up over time. Around 95% of reported value currently sits on a resolved ticker; the rest shows its CUSIP.
The rest of the section is on the Markets overview — including insider transactions, which are the same idea at the individual level, and the correlation finder, where each ticker's page carries its institutional ownership.