Exhibit 99.1

Contact:

Jennifer McGuffin

Director of Corporate Communications

+1.630.245.1780

media@calamos.com

Calamos Asset Management, Inc. Reports Third Quarter 2013 Results and Declares Dividend

NAPERVILLE, Ill., October 22, 2013 – Calamos Asset Management, Inc. (NASDAQ: CLMS), a diversified global investment firm offering equity, lower-volatility equity, fixed income, convertible and alternative strategies, today reported third quarter 2013 results.

Highlights

Non-GAAP diluted earnings per share was $0.20 for the third quarter compared to $0.22 in the previous quarter.¹ Non-GAAP net income attributable to Calamos Asset Management, Inc. (CAM) was $4.1 million for the quarter compared to $4.5 million last quarter. GAAP diluted earnings per share was $0.13 for the third quarter compared to $0.09 per share in the previous quarter.² Net income attributable to CAM was $2.7 million for the quarter compared to $1.8 million last quarter.

Our revenues for the current quarter were $65.0 million compared to $66.7 million in the previous quarter. Operating margin was 23.7% for the third quarter and 27.6% in the previous quarter.

Total Assets³ were $27.5 billion at September 30, 2013 compared to $26.6 billion at the end of last quarter. Net outflows were $1.0 billion for the quarter compared to net outflows of $2.3 billion in the previous quarter.

The Board of Directors of CAM declared a regular quarterly dividend of 12.5 cents per share payable on November 19, 2013 to shareholders of record on November 4, 2013.

Calamos Investments LLC (Calamos Investments) repurchased 904,350 shares of CAM’s common stock since the share repurchase program was announced in the first quarter of 2013, for a total cost of $9.7 million.

The table below highlights certain GAAP and non-GAAP financial measures:

Business Commentary

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Total Assets and Flows

Total Assets as of September 30, 2013 were $27.5 billion, a 3% increase from the previous quarter.

Financial Discussion

Operating Income

Third quarter 2013 revenues of $65.0 million decreased 3% from second quarter 2013 primarily due to a decline in Average Total Assets. Third quarter 2013 operating expenses increased by 3% due to higher compensation as well as marketing and sales promotion expenses which were partially offset by decreases in other expenses. Operating income was $15.4 million for the third quarter versus $18.4 million in the previous quarter. Operating margin was 23.7% for the third quarter, down from 27.6% in the second quarter of 2013.

Non-Operating Income

Non-operating income, net of non-controlling interest in partnerships, was $3.9 million during the third quarter of 2013, as presented in Table B.

The company’s investment portfolio had a return of 6.3% for the third quarter of 2013 and a return of (2.3)% for the second quarter of 2013, as presented in Table C.

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Income Taxes

CAM’s effective tax rate for the third quarter was 37.4% versus 58.2% in the previous quarter, as presented in Table D. The decrease in the effective tax rate was due to a valuation allowance the company recorded in the second quarter totaling $900,000 as CAM may not be able to fully utilize its capital loss carryforward based on current market conditions. As of September 30, 2013, the net deferred tax asset was $2.2 million, and the ultimate realization of this deferred tax asset is dependent upon the generation of sufficient capital gains prior to the expiration of capital loss carryforwards in 2013 and 2014.

Financial Position

As of September 30, 2013, the corporate investment portfolio included $71.6 million in cash and cash equivalents and $441.3 million in investments that were principally comprised of investments in products that the company manages. The corporate investment portfolio is used to provide seed capital for new products, to maintain conservative levels of capital for the company’s regulated subsidiaries, to fund the company’s share repurchase program and to invest in other corporate strategic initiatives. The company’s financial strength is also instrumental in maintaining the firm’s investment-grade credit rating.

As of September 30, 2013, total debt was $92.1 million and total stockholders’ equity was $492.0 million.

As part of the share repurchase program to acquire up to 3 million shares of the company’s common stock, as announced in the first quarter of 2013, Calamos Investments repurchased 904,350 shares of CAM’s common stock at an average price of $10.74 per share and a total cost of $9.7 million during the first nine months of the year.

Market Capitalization

As of September 30, 2013, CAM, representing the public shares outstanding, owns 22.2% of the operating company, Calamos Investments, and the remaining 77.8% is privately owned by Calamos Family Partners. Because of this complex ownership structure, reported market capitalization does not reflect the entire value of the company, but rather only the market capitalization pertaining to CAM’s 22.2% interest, which is publicly traded.

Investor Conference Call

Management will hold an investor conference call at 4 p.m. Central Time on Tuesday, October 22, 2013. To access the live call and view management’s presentation, visit the Investor Relations section of the company’s website at www.calamos.com/investors. Alternatively, participants may listen to the live call by dialing 800.723.6575 in the U.S. or Canada (785.830.1997 internationally), then entering conference ID #3961693. A replay of the call will be available for one week following the date of the call by dialing 888.203.1112 in the U.S. or Canada (719.457.0820 internationally), then entering conference ID #3961693. The webcast also will be available on the Investor Relations section of the company’s website at www.calamos.com/investors for at least 90 days following the date of the call.

Calamos Asset Management, Inc. (NASDAQ: CLMS) is a diversified global investment firm offering innovative investment strategies including equity, lower-volatility equity, fixed income, convertible and alternative investments. The firm offers strategies through separately managed portfolios, mutual funds, closed-end funds, private funds and UCITS funds. Clients include major corporations, pension funds, endowments, foundations and individuals, as well as the financial advisors and consultants who serve them. Headquartered in the Chicago metropolitan area, the firm also has offices in London and New York. For more information visit www.calamos.com.

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Forward-Looking Statements & Important Risk Disclosures

From time to time, information or statements provided by us, including those within this news release, may contain certain forward-looking statements relating to future events, future financial performance, strategies, expectations, the competitive environment and regulations. Forward-looking statements are based on information available at the time those statements are made and/or management’s good faith belief as of that time with respect to future events, and are subject to risks and uncertainties that could cause actual performance or results to differ materially from those expressed in or suggested by the forward-looking statements. For a discussion concerning some of these and other risks, uncertainties and other important factors that could affect future results, see “Forward-Looking Information” in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and, where applicable, “Risk Factors” in our annual and quarterly reports filed with the U.S. Securities and Exchange Commission.

Investments in mutual funds are subject to risks, and you could lose money on your investment in the fund. There can be no assurance that the fund will achieve its investment objective. Your investment in the fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. The risks associated with an investment in the fund can increase during times of significant market volatility. The fund-specific principal risks are described below. More detailed information can be found in the fund’s prospectus.

The principal risks of investing in the Calamos Dividend Growth Fund include: equity risk, equity securities of Master Limited Partnerships risk, portfolio selection risk, portfolio turnover risk, foreign securities risk, American Depositary Receipts risk, Master Limited Partnership (MLP) risk, MLP tax and liquidity risk, value stock risk, options risk, Rule 144A risk, and RIC Qualification risk.

The principal risks of investing in the Calamos Mid Cap Growth Fund include: equity risk, growth stock risk, midsized company risk, options risk, American Depositary risk, Rule 144A risk, portfolio selection risk, and portfolio turnover risk.

The principal risks of investing in the Calamos Evolving World Growth Fund include: equity risk, growth stock risk, foreign securities risk, emerging markets risk, convertible and synthetic convertible securities risk, portfolio selection risk, interest rate risk, and credit risk.

The principal risks of investing in the Calamos Convertible Fund include: convertible securities risk, synthetic convertible instruments risk, foreign securities risk, equity securities risk, interest rate risk, credit risk, high yield risk, portfolio selection risk and liquidity risk.

Before investing carefully consider the fund’s investment objectives, risks, charges and expenses. Please see the prospectus containing this and other information at www.calamos.com or call 1-800-582-6959. Read it carefully.

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Calamos Asset Management, Inc.

Consolidated Condensed Statements of Operations

(in thousands, except share data)

(Unaudited)

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Calamos Asset Management, Inc.

Total Assets

(in millions)

(Unaudited)

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Table A

Calamos Asset Management, Inc.

Reconciliation of GAAP to Non-GAAP Diluted Earnings Per Share

(in thousands, except share data)

(Unaudited)

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Table A – Notes

Calamos Asset Management, Inc.

Notes to Reconciliation of GAAP to Non-GAAP

The company provides investors with certain adjusted, non-GAAP financial measures including non-GAAP net income attributable to CAM and non-GAAP diluted earnings per share. These non-GAAP financial measures are provided to supplement the consolidated financial statements presented on a GAAP basis. These non-GAAP financial measures adjust GAAP financial measures to include the tax benefit from the amortization of deferred taxes on intangible assets and to exclude the increase in deferred tax valuation allowance and CAM’s non-operating income, net of taxes. The company believes these adjustments are appropriate to enhance an overall understanding of operating financial performance, as well as to facilitate comparisons with historical earnings results. These adjustments to the company’s GAAP results are made with the intent of providing investors a more complete understanding of the company’s underlying earnings results and trends and marketplace performance. In addition, these non-GAAP financial measures are among the primary indicators management uses as a basis of managing the company.

The presentation of this additional information is not meant to be considered in isolation or as a substitute for the directly comparable financial measures prepared in accordance with GAAP. Investors should review the reconciliations of the non-GAAP financial measures to their most directly comparable GAAP financial measures as provided in Table A.

Non-GAAP net income attributable to CAM is calculated by adjusting the following items from GAAP net income attributable to CAM:

(i) amortization of deferred taxes on intangible assets associated with the election under section 754 of the Internal Revenue Code of 1986, as amended (Section 754 election);

(ii) increase in deferred tax valuation allowance; and

(iii) CAM’s non-operating income, net of taxes.

Non-GAAP diluted earnings per share is calculated by dividing non-GAAP net income attributable to CAM by diluted weighted average shares outstanding.

The deferred tax assets from the Section 754 election allows for a quarterly reduction of approximately $2.0 million in future income taxes owed by the company through 2019, to the extent that a tax payable exists during the quarter. As a result, this cash savings will accrue solely for the benefit of the shareholders of the company’s common stock. The company believes that adjusting this item from the calculation of the above non-GAAP items can be a useful measure in allowing investors to see the company’s performance. The change in the allowance on the deferred tax asset is excluded from the above non-GAAP items as it may fluctuate in future periods affecting prior period comparisons. Non-operating income is excluded from the above non-GAAP items as it can distort comparisons between periods. As noted above, the company believes that measures excluding these items are useful in analyzing operating trends and allowing for more comparability between periods, which may be useful to investors.

The company believes that non-GAAP net income attributable to CAM and non-GAAP diluted earnings per share are useful measures of performance and may be useful to investors, because they provide measures of the company’s core business activities adjusting for items that are non-cash and costs that may distort comparisons between periods. These measures are provided in addition to the company’s net income attributable to CAM and diluted earnings per share calculated under GAAP, but are not substitutes for those calculations.

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Table B

Calamos Asset Management, Inc.

Non-Operating Income, Net of Non-Controlling Interest in Partnership Investments

(in thousands)

(Unaudited)

Table C

Calamos Asset Management, Inc.

Summary of Corporate Investment Portfolio Returns

(in thousands)

(Unaudited)

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Table D

Calamos Asset Management, Inc.

Effective Income Tax Rate

(in thousands)

(Unaudited)

Source: Calamos Asset Management, Inc.

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