Sec Form 4 Filing - GELFOND RICHARD L @ IMAX CORP - 2026-08-18

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person GELFOND RICHARD L 2. Issuer Name and Ticker or Trading Symbol IMAX CORP [ IMAX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) 902 BROADWAY, 20TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 08/18/2026 (Street) NEW YORK, NY10010-6002 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price common shares (opening balance) 765,002 D common shares 08/18/2026 C 151,253 ( 1 ) A $ 31.9 916,255 D common shares 08/18/2026 S 151,253 ( 2 ) D $ 51.0049 765,002 D common shares 08/19/2026 C 205,504 ( 1 ) A $ 31.9 970,506 D common shares 08/19/2026 S 205,504 ( 2 ) D $ 53.2656 765,002 D common shares 08/20/2026 S 100,000 D $ 53.2337 665,002 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares stock options (to buy) ( 3 ) $ 31.9 08/18/2026 C 151,253 ( 4 ) 01/03/2027 common shares 151,253 $ 31.9 1,181,158 ( 5 ) D stock options (to buy) ( 3 ) $ 31.9 08/19/2026 C 205,504 ( 4 ) 01/03/2027 common shares 205,504 $ 31.9 975,654 ( 5 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other GELFOND RICHARD L 902 BROADWAY 20TH FLOOR NEW YORK, NY10010-6002 X Chief Executive Officer Signatures /s/ Richard L. Gelfond 08/20/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the conversion upon exercise of stock options into common shares pursuant to a 10b5-1 Plan dated May 19, 2026. ( 2 )Represents the sale of converted common shares pursuant to a 10b5-1 Plan dated May 19, 2026. ( 3 )These options were issued in 2017 and are set to expire on January 3, 2027. ( 4 )The stock options became exercisable in nine installments: 39,640 on each of May 1, 2017, September 1, 2017, May 1, 2018, December 31, 2018, September 1, 2019 and December 31, 2019, and 39,639 on each of December 31, 2017, September 1, 2018 and May 1, 2019. ( 5 )This represents the number of common shares for this transaction only. Mr. Gelfond's aggregate remaining outstanding option, restricted share unit and common share balances following these transactions will be 975,654, 231,562 and 665,002, respectively.

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