FORM 4 [X] 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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Crews Mikel D
2. Issuer Name and Ticker or Trading Symbol

AAON, INC. [ AAON ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Vice President of Operations
(Last)          (First)          (Middle)

2425 SOUTH YUKON
3. Date of Earliest Transaction (MM/DD/YYYY)

5/8/2020
(Street)

TULSA, OK 74107
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 Stock, par value $.004 5/8/2020  F  1313 (1)D$48.94 19114 D  
Common Stock, par value $.004 5/8/2020  D  1600 (2)D$48.94 17514 D  
Common Stock, par value $.004         43505 I 401(k) Plan 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy) $7.18           5/8/2020 (3)5/8/2021 (4)Common Stock 1000.0  1000 D  
Stock Option (Right to Buy) $8.65           5/8/2020 (3)5/8/2021 (4)Common Stock 1350.0  1350 D  
Stock Option (Right to Buy) $22.15           5/8/2020 (3)5/8/2021 (4)Common Stock 3190.0  3190 D  
Stock Option (Right to Buy) $34.1           5/8/2020 (3)5/8/2021 (4)Common Stock 27150.0  27150 D  
Stock Option (Right to Buy) $34.15           5/8/2020 (3)5/8/2021 (4)Common Stock 3345.0  3345 D  
Stock Option (Right to Buy) $36.95           5/8/2020 (3)5/8/2021 (4)Common Stock 31600.0  31600 D  
Stock Option (Right to Buy) $41.37           5/8/2020 (3)5/8/2021 (4)Common Stock 60000.0  60000 D  
Common Stock $44.22 5/8/2020  D     23740 (5) 3/11/2021 3/11/2030 Common Stock 23740.0 $44.22 0 D  

Explanation of Responses:
(1) Tax withholding on vesting of Restricted Stock Awards due to retirement, effective May 8, 2020.
(2) Forfeiture of Restricted Stock Award (granted 3/11/2020) due to retirement, effective May 8, 2020.
(3) Date Exercisable (but not exercised) is accelerated upon retirement, effective May 8, 2020.
(4) Expiration date (1 year from retirement) is accelerated upon retirement, effective May 8, 2020.
(5) Forfeiture of Stock Option Award (granted 3/11/2020) due to retirement, effective May 8, 2020.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Crews Mikel D
2425 SOUTH YUKON
TULSA, OK 74107


Vice President of Operations

Signatures
Mikel D. Crews5/12/2020
**Signature of Reporting PersonDate

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