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Calamos Advisors LLC

CIK:0001316507
Asset Manager
$21B AUM
919 holdings
Naperville, IL, United States
Founded:1977
300 employees
Latest filing:Sep 30, 2025

Calamos Advisors LLC, founded in 1977, is a diversified global investment firm headquartered in Naperville, IL, in the Chicago metropolitan area. It is a subsidiary of Calamos Investments and provides a broad array of investment strategies including convertible, liquid alternatives, sustainable equity, fixed income, and multi-asset solutions. The firm serves institutional investors, corporations, pension funds, endowments, foundations, and individuals through various vehicles like mutual funds, separately managed portfolios, private funds, and UCITS. Calamos employs over 300 professionals and has offices across major US cities, maintaining a reputation for innovation in risk-managed investing and thought leadership.

Investment Strategy

Calamos Advisors LLC follows an active, high-conviction approach driven by combining top-down macroeconomic insights with rigorous bottom-up fundamental research. Portfolios are built collaboratively by specialized teams focusing on their area of expertise, leveraging risk management and proprietary research. The firm's strategies encompass convertible securities, alternatives, multi-asset portfolios, and sustainability factors for select funds. The Calamos Investment Committee helps shape macro views, asset allocation, and sector positioning, maintaining excellence in both performance and client service.

Top Buys
N
NVDANVIDIA CORPORATION
+$197.7M
A
AAPLAPPLE INC
+$193.2M
G
GOOGLALPHABET INC
+$129.0M
T
TSLATESLA INC
+$96.4M
A
AVGOBROADCOM INC
+$77.8M
Top Sells
H
HESHESS CORP
-$82.2M
J
JNPRJUNIPER NETWORKS INC
-$46.5M
A
ANSSANSYS INC
-$43.9M
N
NEE-PRNEXTERA ENERGY INC
-$43.6M
C
CMGCHIPOTLE MEXICAN GRILL INC
-$40.5M

Top Holdings

N
NVDANVIDIA CORPORATION
+5.2%$1.39B
M
MSFTMICROSOFT CORP
+4.2%$1.14B
A
AAPLAPPLE INC
+3.8%$1.04B
A
AMZNAMAZON COM INC
+2.6%$705.6M
G
GOOGLALPHABET INC
+2.0%$544.8M

Equity Positions (591)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
N
NVDA
NVIDIA CORPORATION5.15%$1.39B7,475,880$8.03$186.58+$197.7M
M
MSFT
MICROSOFT CORP4.20%$1.14B2,197,239$119.54$517.95+$28.0M
A
AAPL
APPLE INC3.83%$1.04B4,074,858$55.83$254.63+$193.2M
A
AMZN
AMAZON COM INC2.61%$705.6M3,213,654$77.07$219.57-$14.6M
G
GOOGL
ALPHABET INC2.01%$544.8M2,241,020$65.43$243.10+$129.0M

Options Positions (10)

TickerSecurityActionTypeNotional ValueContractsUnderlying PricePremium PaidChange (Contracts)Change (Value)
S
SPY
SPDR S&P 500 ETF TRSold
Put
$711.3M11,513$666.18$557.66-3,677-$138.4M
Q
QQQ
INVESCO QQQ TRBought
Put
$414.6M7,515$600.37$552.74+4,605+$278.1M
S
SPY
SPDR S&P 500 ETF TRSold
Call
$362.8M5,872$666.18$570.85-1,352-$41.3M
I
IWM
ISHARES TRSold
Call
$150.3M6,963$241.96$213.95-415+$3.1M
I
IWM
ISHARES TRSold
Put
$140.7M6,519$241.96$213.61-9+$10.4M

Industry Allocation

SEMICONDUCTORS & RELATED DEVICES
+8.3%
SERVICES-PREPACKAGED SOFTWARE
+7.7%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+5.7%
ELECTRONIC COMPUTERS
+3.9%
RETAIL-CATALOG & MAIL-ORDER HOUSES
+2.6%