The Fund is an actively managed exchange-traded fund ("ETF") that does not seek to replicate the performance of a specified index. The Fund will, under normal circumstances, invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in equity securities of companies in developed markets (including the U.S.) and emerging markets (including frontier market countries) that, in the view of Calamos Advisors LLC's ("Calamos Advisors") investment team (the "Team"), have above average growth potential and meet the sustainable investment criteria set out below. Under normal market conditions, the Fund will invest at least 40% of its net assets in non-U.S. equity securities, including emerging markets, unless market conditions are not deemed favorable by the Sub-adviser, in which case the Fund will invest at least 30% of its net assets in non-U.S. equity securities. The Fund generally invests in a minimum of five (5) countries.

Emerging markets are markets of countries in the initial stages of industrialization and generally have low per capita income. Foreign (non-U.S.) companies are those that either maintain their principal place of business outside of the United States, have their securities principally traded on non-U.S. exchanges or were formed under the laws of non-U.S. countries. Foreign companies may include companies doing business in the United States but meet the general criteria of a foreign company

described above. Certain emerging markets are sometimes referred to as "frontier markets." Frontier markets are the least advanced capital markets in the developing world. Frontier markets are countries with investable stock markets that are less established than those in the emerging markets. To determine if a country is an emerging market or frontier market country, the Team will use the classification provided by MSCI, Inc, a global investment research firm that provides stock indexes and portfolio risk and performance analytics. Foreign securities include American Depositary Receipts ("ADRs") or securities guaranteed by a U.S. person but which represent underlying shares of foreign issuers, and may include foreign securities in the form of European Depositary Receipts ("EDRs"), Global Depositary Receipts ("GDRs") or other securities representing underlying shares of foreign issuers.

The Team employs an integrated, fundamental, and proprietary sustainable investment research process to evaluate and select what the Team deems are high-quality growth opportunities. The Team believes a portfolio of equities issued by high-quality growth companies characterized by a history of producing consistent returns above the cost of capital with sustainable competitive advantages is the best way to achieve steady, strong, enduring relative returns. The Team believes that companies with strong sustainability characteristics (as further described below) are better equipped to adapt to change, to evolve, and to avoid unnecessary liabilities (which could include, for example, litigation costs), which means that investment in such companies has the potential to contribute to investor return and risk reduction. The Team believes that integrating this sustainability analysis alongside traditional financial analysis produces better financial and societal results.

The Team utilizes a proprietary sustainable investment research process, considering both quantitative and qualitative sustainability factors, to identify responsible, engaged companies (companies that demonstrate awareness and action surrounding the material environmental, social and governance issues facing their businesses and industries). The Team believes that a company's understanding of these principles demonstrates the qualities of innovation and leadership that create a distinct competitive advantage and build long-term value for a company. The Team considers a company's position on various factors such as ecological limits, environmental stewardship, environmental strategies, stance on human rights and equality, societal impact as well as its corporate governance practices. The Team conducts fundamental research to find companies with attractive financial and sustainability attributes. In conducting fundamental research, the Team combines traditional investment information with its proprietary three-tiered investment research process to identify companies which it believes represent leaders in sustainable business practices.

The Team believes that this creates a complete picture of how each company behaves commercially and how it deals with existing and emerging sustainability risks and opportunities. The three-tiered sustainable investment research process consists of: 1) exclusionary screens; 2) materiality assessments and 3) environmental and social impact scoring, each of which is described in turn below.

1.  Exclusionary Screens: This process results in identifying certain industries and business activities that, in the Team's belief, are too environmentally risky or present social outcomes that are too unattractive to warrant investment consideration, which are thus avoided by the Team. The Team will generally exclude an issuer from investment consideration where the issuer derives revenue or profits that exceed 5% from one or more of the below-listed industries/business activities, namely:

•  agricultural biotechnology,

•  alcohol,

•  animal testing*,

•  fossil fuels,

•  gambling,

•  metals & mining,

•  nuclear energy,

•  tobacco, and

•  weapons.

*  A company's activities involving animal testing are considered on a case-by-case basis depending on purpose and methods.

2.  Materiality Assessment: The Team then applies third-party materiality mapping tools combined with its own insights and emphasis on environmental and social leadership to develop materiality theses, which enable the Team to identify and analyze the key ESG risks/opportunities for a particular industry.

3.  Environmental and Social Scoring: Overlaying these top-down and bottom-up approaches, the Team then utilizes a proprietary sustainable investment scoring system, which considers both quantitative and qualitative factors, to identify investments for the Fund. The scoring system also considers a company's position in respect of various environmental and social characteristics, including: product contribution to a sustainable economy; product lifecycle innovation; operational efficiencies; inclusive finance; ensuring health and providing basic services; as well as a company's corporate governance practices. These qualitative metrics are considered alongside quantitative factors produced by research, and together, a score is determined, applied, and monitored going forward. The abovementioned score is just one part of the process. While required as a minimum, a "good" environmental and/or social score, one higher than 3 (out of 5), does not automatically mean that the Fund will invest in an investee company.

The Team utilizes a range of data sources as part of its proprietary sustainability ratings system. These data sources may include: corporate disclosures, third party research providers (e.g., ISS ESG, MSCI ESG, Bloomberg, etc.), non-governmental organizations ("NGOs") and non-profits (e.g., Greenpeace, Friends of Earth, etc.), academic publications, news services and memberships. While the Team may utilize the underlying data which supports a third party's ESG rating of an issuer, the Team does not rely on any ESG ratings of third-party research providers. The Team employs its proprietary sustainability ratings system for both initial company recommendations and ongoing monitoring of investments.

The Team may sell an investment in cases of valuation adjustments, availability of more attractive alternatives, or breakdowns in financial fundamentals or sustainability performance.

The Fund is classified as "diversified" under the Investment Company Act of 1940 (the "1940 Act").