Sec Form 4 Filing - Whitney Grant @ Sun Country Airlines Holdings, Inc. - 2021-09-13

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 Whitney Grant 2. Issuer Name and Ticker or Trading Symbol Sun Country Airlines Holdings, Inc. [ SNCY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Revenue Officer & EVP (Last) (First) (Middle) C/O SUN COUNTRY AIRLINES HOLDINGS, INC. 3. Date of Earliest Transaction (MM/DD/YY) 09/13/2021 (Street) MINNEAPOLIS, MN55450 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

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 Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 90 ( 1 ) 07/31/2029 Common Stock 90 $ 30.73 106,948 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 15 ( 1 ) 07/31/2029 Common Stock 15 $ 30.75 106,933 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 200 ( 1 ) 07/31/2029 Common Stock 200 $ 30.82 106,733 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 30.83 106,633 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 200 ( 1 ) 07/31/2029 Common Stock 200 $ 30.86 106,433 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 300 ( 1 ) 07/31/2029 Common Stock 300 $ 30.88 106,133 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 30.89 106,033 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 300 ( 1 ) 07/31/2029 Common Stock 300 $ 30.9 105,733 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 30.92 105,633 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 200 ( 1 ) 07/31/2029 Common Stock 200 $ 30.93 105,433 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 200 ( 1 ) 07/31/2029 Common Stock 200 $ 30.96 105,233 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 30.97 105,133 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 30.98 105,033 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 1 00 $ 31.01 104,933 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.03 104,833 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.04 104,733 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 200 ( 1 ) 07/31/2029 Common Stock 200 $ 31.07 104,533 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 101 ( 1 ) 07/31/2029 Common Stock 101 $ 31.1 104,432 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.16 104,332 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.23 104,232 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.24 104,132 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.33 104,032 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.34 103,932 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 99 ( 1 ) 07/31/2029 Common Stock 99 $ 31.48 103,833 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 29 ( 1 ) 07/31/2029 Common Stock 29 $ 31.52 103,804 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 130 ( 1 ) 07/31/2029 Common Stock 130 $ 31.53 103,674 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 100 ( 1 ) 07/31/2029 Common Stock 100 $ 31.61 103,574 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 66 ( 1 ) 07/31/2029 Common Stock 66 $ 31.615 103,508 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 S 70 ( 1 ) 07/31/2029 Common Stock 70 $ 31.63 103,438 D Employee Stock Option (Right to Buy) $ 5.3 09/13/2021 M 4,000 ( 1 ) 07/31/2029 Common Stock 4,000 $ 0 99,438 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Whitney Grant C/O SUN COUNTRY AIRLINES HOLDINGS, INC. MINNEAPOLIS, MN55450 Chief Revenue Officer & EVP Signatures /s/ Eric M. Levenhagen 09/15/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Vest in four annual installments, subject to continued service, beginning May 20, 2020.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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