IMAX CORPORATION

Exhibit 99.1

IMAX CORPORATION

2525 Speakman Drive

Mississauga, Ontario, Canada L5K 1B1

Tel: (905) 403-6500 Fax: (905) 403-6450

www.imax.com

IMAX CORPORATION REPORTS FIRST QUARTER 2013 FINANCIAL RESULTS

HIGHLIGHTS

NEW YORK, NY – April 25, 2013 – IMAX Corporation (NYSE:IMAX; TSX:IMX) today reported first quarter 2013 revenues of $49.9 million, adjusted EBITDA as calculated in accordance with the Company’s credit facility of $13.9 million, adjusted net income of $5.6 million, or $0.08 per diluted share, and reported net income of $2.9 million, or $0.04 per diluted share.

“In the first quarter, we continued to execute against our three main Company priorities for the year – Penetration, Differentiation, and Scale,” said IMAX Chief Executive Officer Richard L. Gelfond. “We expect these to be key drivers of our long-term growth, while supporting our results in the near-term, and we are excited about the promising upcoming lineup of films in IMAX, particularly in the second quarter.”

Network Growth Update

The total IMAX^® theatre network consisted of 738 systems as of March 31, 2013, of which 606 were in commercial multiplexes. There were 283 theatre systems in backlog as of March 31, 2013, compared to 261 theatre systems in backlog as of March 31, 2012. For a breakdown of theatre system signings, installations, network and backlog by type, please see the end of this press release.

In the first quarter of 2013, the Company signed contracts for 25 theatre systems, of which 17 were in new theatre locations and 8 were additional signings for laser systems and conversion of some of the Company’s film theatres to digital systems in existing theatre locations. In the quarter the Company installed 17 theatre systems, of which 10 were in new theatre locations.

“We are very pleased that we continue to penetrate different countries around the world, strengthening our presence in some and building strong theatres in new markets to catalyze future growth in others,” Gelfond continued. “Our one-of-a-kind, end-to-end entertainment solution is driving demand from exhibitor and studio partners from around the world, who have seen the value of being in the IMAX business. We remain optimistic as our growth opportunity in underpenetrated international regions, combined with our ability to program each of those markets individually, continues to position IMAX as a unique player in the global entertainment industry.”

First-Quarter Segment Results

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“Looking ahead, the heart of the summer box office season kicks into gear this week including the release of the IMAX^® 3D version of Iron Man 3, followed by Star Trek: Into Darkness, Man of Steel and an international only release of Fast & Furious 6, providing a strong foundation for our full portfolio of films this year,” Gelfond concluded. “We have secured many key tentpole films for the remainder of 2013, as well as 2014 and beyond, including Christopher Nolan’s Interstellar and Michael Bay’s Transformers 4, both of which will be captured with IMAX cameras, demonstrating the ongoing desire of studios and filmmakers to leverage the IMAX platform to bring audiences the most immersive entertainment experiences that they cannot get anywhere else.”

Conference Call

The Company will host a conference call today at 8:30 AM ET to discuss its first quarter 2013 financial results. To access the call via telephone, interested parties should dial (800) 820-0231 approximately 5 to 10 minutes before it begins. International callers should dial (416) 640-5926. The participant passcode for the call is 7114021. This call is also being webcast by Thomson Financial and can be accessed on the ‘Investor Relations’ section of www.imax.com. A replay of the call will be available via webcast on the ‘Investor Relations’ section of www.imax.com or via telephone by dialing (888) 203-1112 (US and Canada) or (647) 436-0148 (international). The Conference ID for the telephone replay is 7114021.

About IMAX Corporation

IMAX, an innovator in entertainment technology, combines proprietary software, architecture and equipment to create experiences that take you beyond the edge of your seat to a world you’ve never imagined. Top filmmakers and studios are utilizing IMAX theatres to connect with audiences in extraordinary ways, and, as such, IMAX’s network is among the most important and successful theatrical distribution platforms for major event films around the globe.

IMAX is headquartered in New York, Toronto and Los Angeles, with offices in London, Tokyo, Shanghai and Beijing. As of Mar. 31, 2013, there were 738 IMAX theatres (606 commercial multiplexes, 19 commercial destinations and 113 institutions) in 53 countries.

IMAX^®, IMAX^® 3D, IMAX DMR^®, Experience It In IMAX^®, An IMAX 3D Experience^®, The IMAX Experience^® and IMAX Is Believing^® are trademarks of IMAX Corporation. More information about the Company can be found at www.imax.com. You may also connect with IMAX on Facebook (www.facebook.com/imax), Twitter (www.twitter.com/imax) and YouTube (www.youtube.com/imaxmovies).

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This press release contains forward looking statements that are based on IMAX management’s assumptions and existing information and involve certain risks and uncertainties which could cause actual results to differ materially from future results expressed or implied by such forward looking statements. Important factors that could affect these statements include, but are not limited to, general economic, market or business conditions; the opportunities (or lack thereof) that may be presented to and pursued by the Company; the performance of IMAX DMR films; competitive actions by other companies; conditions in the in-home and out-of-home entertainment industries; the signing of theater system agreements; changes in laws or regulations; conditions, changes and developments in the commercial exhibition industry; the failure to convert theater system backlog into revenue; risks associated with investments and operations in foreign jurisdictions and any future international expansion, including those related to economic, political and regulatory policies of local governments and laws and policies of the United States and Canada; risks related to the Company’s growth and operations in China; the failure to respond to change and advancements in digital technology; risks related to the acquisition of AMC Entertainment Holdings, Inc. by Dalian Wanda Group Co., Ltd.; risks related to new business initiatives; the potential impact of increased competition in the markets within which the Company operates; risks related to the Company’s inability to protect the Company’s intellectual property; risks

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related to Eastman Kodak bankruptcy and the possibility of constrained film supply; risks related to the Company’s implementation of a new enterprise resource planning system; risks related to the Company’s prior restatements and the related litigation; and other factors, many of which are beyond the control of the Company. These factors, other risks and uncertainties and financial details are discussed in IMAX’s most recent Annual Report on Form 10-K and Quarterly Reports on Form 10-Q.

For additional information please contact:

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Additional Information

Theatre Network Details:

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Additional Information (continued)

2013 DMR Films Announced to Date:

To date, IMAX has announced 28 titles to be released in 2013. The Company released 35 titles in 2012. The Company remains in discussions with virtually every major studio regarding future titles and expects the total number of titles in 2013 to be similar to that in 2012.

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IMAX CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

In accordance with United States Generally Accepted Accounting Principles

(In thousands of U.S. dollars, except per share amounts)

(Unaudited)

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IMAX CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

In accordance with United States Generally Accepted Accounting Principles

(in thousands of U.S. dollars)

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IMAX CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

In accordance with United States Generally Accepted Accounting Principles

(In thousands of U.S. dollars)

(Unaudited)

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IMAX CORPORATION

SELECTED FINANCIAL DATA

In accordance with United States Generally Accepted Accounting Principles

(in thousands of U.S. dollars)

The Company has seven reportable segments identified by category of product sold or service provided: IMAX systems; theater system maintenance; joint revenue sharing arrangements; film production and IMAX DMR; film distribution; film post-production; and other. The IMAX systems segment is comprised of the design, manufacture, sale or lease IMAX theater projection system equipment. The theater system maintenance segment consists of the maintenance of IMAX theater projection system equipment in the IMAX theater network. The joint revenue sharing arrangements segment is comprised of the installation IMAX theater projection system equipment to an exhibitor in exchange for a certain percentage of box-office receipts, concession revenue and in some cases a small upfront or initial payment. The film production and IMAX DMR segment is comprised of the production of films and performance of film re-mastering services. The film distribution segment includes the distribution of films for which the Company has distribution rights. The film post-production segment includes the provision of film post-production and film print services. The other segment includes certain IMAX theaters that the Company owns and operates, camera rentals and other miscellaneous items.

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IMAX CORPORATION

OTHER INFORMATION

(in thousands of U.S. dollars)

Non-GAAP Financial Measures:

In this release, the Company presents adjusted EBITDA, adjusted net income and adjusted net income per diluted share as supplemental measures of performance of the Company, which are not recognized under United States generally accepted accounting principles (“GAAP”). The Company presents adjusted EBITDA, adjusted net income and adjusted net income per diluted share because it believes that they are important supplemental measures of its comparable controllable operating performance and it wants to ensure that its investors fully understand the impact of its stock-based compensation expense and the related tax impact. Management uses these measures to review operating performance on a comparable basis from period to period. However, these non-GAAP measures may not be comparable to similarly titled amounts reported by other companies. Adjusted EBITDA, adjusted net income and adjusted net income per diluted share should be considered in addition to, and not as a substitute for, net income and other measures of financial performance reported in accordance with GAAP.

Adjusted EBITDA is calculated on a basis consistent with the Company’s Credit Facility, which refers to Adjusted EBITDA as EBITDA. The Credit Facility provides that the Company will be required to maintain a Fixed Charge Coverage Ratio (as defined in the Credit Agreement) of not less than 1.1:1.0. The Company will also be required to maintain minimum EBITDA (as defined in the Credit Agreement) of $70.0 million between closing and December 30, 2013, which requirement increases to $80.0 million on December 31, 2013, $90.0 million on December 31, 2014, and $100.0 million on December 31, 2015. The Company must also maintain a Maximum Total Leverage Ratio (as defined in the Credit Agreement) of 2.5:1.0 between closing and December 30, 2013, which requirement decreases to (i) 2.25:1.0 on December 31, 2013; (ii) 2.00:1:0 on December 31, 2014; and (iii) 1.75:1.0 on December 31, 2015. The ratio of total debt to EBITDA was 0.17:1 as at March 31, 2013, where Total Debt (as defined in the Credit Agreement) is the sum of all obligations evidenced by notes, bonds, debentures or similar instruments and was $18.0 million. EBITDA is calculated as follows:

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IMAX CORPORATION

OTHER INFORMATION

(in thousands of U.S. dollars)

Adjusted Net Income and Adjusted Diluted Earnings Per Share Calculations – Quarter Ended March 31, 2013 vs. 2012:

The Company reported net income of $2.9 million, or $0.04 per basic and diluted share, for the first quarter of 2013, as compared to net income of $2.5 million or $0.04 per basic and diluted share for the first quarter of 2012. Net income for the first quarter of 2013 includes a $2.8 million charge, or $0.04 per diluted share, for stock-based compensation (2012 - $3.8 million or $0.05 per diluted share). Adjusted net income, which consists of net income excluding stock-based compensation expense and the related tax benefit, was $5.6 million, or $0.08 per diluted share, in the first quarter of 2013, as compared to adjusted net income of $6.1 million, or $0.09 per diluted share, for the first quarter of 2012. A reconciliation of net income, the most directly comparable U.S. GAAP measure, to adjusted net income and adjusted net income per diluted share is presented in the table below:

Free Cash Flow:

Free cash flow is defined as cash provided by operating activities minus cash used in investing activities (from the consolidated statements of cash flows). Cash provided by operating activities consist of net income, plus depreciation and amortization, plus the change in deferred income taxes, plus other non-cash items, plus changes in working capital, less investment in film assets, plus other changes in operating assets and liabilities. Cash used in investing activities includes capital expenditures, acquisitions and other cash used in investing activities. Management views free cash flow, a non-GAAP measure, as a measure of the Company’s after-tax cash flow available to reduce debt, add to cash balances, and fund other financing activities. A reconciliation of cash provided by operating activities to free cash flow is presented in the table below:

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