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Calamos Advisors LLC

Location
NAPERVILLE, IL
Portfolio Value
Large $19,720,746,711
Diversification
Diversified
Filing Date
Global Rank
#51 / 4,286 ▲ 207
Top Industry
Semiconductors 17.6%
3Y Alpha vs SPY
+1.0%
Period ended 37 days ago
Filed Jul 31, 2026 · 6d
26 quarters · since Mar 2020

Clone Performance

Aug 2023–Aug 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio
+83.0%
SPY
+78.8%
Annualised alpha
+1.0%
Max drawdown
−19.7%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 92% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

547 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
8.0%
−0.1 pts
Top 5
28.9%
−2.6 pts
Top 10
40.9%
−3.1 pts
HHI
241
Sep 2023 → Jun 2026 · range 207 – 283
Diversified−22

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Technology 34.8% $6,861,296,723
Financial Services 10.6% $2,081,734,089
Unclassified 10.0% $1,974,346,082
Consumer Cyclical 9.3% $1,830,491,482
Industrials 8.3% $1,631,282,709
Healthcare 8.2% $1,623,226,075
Communication Services 8.1% $1,600,821,419
Consumer Defensive 4.1% $815,192,849
Energy 2.6% $522,405,002
Basic Materials 1.6% $318,868,680
Utilities 1.5% $292,487,937
Real Estate 0.9% $168,593,664

Last Quarter's Activity

Export CSV
Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
547 tracked positions · $19,720,746,711 total · filing declares 1,059 positions · $30,069,138,419 · as of Jun 30, 2026
Showing 1–50 of 547 positions by value · page 1 of 11
Ticker Company Shares Value (USD) % of Portfolio History

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.