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 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 * Wakefield Stephen E 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)
VP, Engineering
(Last)          (First)          (Middle)
2425 SOUTH YUKON		 3. Date of Earliest Transaction (MM/DD/YYYY)
5/7/2019
(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   5/7/2019     S    1118   D $47.83   (1) 6878   D    
Common Stock, par value $.004                  4484   I   401(k) Plan  
Common Stock                  625   I   By Spouse  

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 Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. 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 Date 7. 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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   $22.76                    12/18/2016   12/18/2025   Common Stock   3064.0     3064   D    
Stock Option (Right to Buy)   $26.47                    8/1/2017   8/1/2026   Common Stock   1415.0     1415   D    
Stock Option (Right to Buy)   $32.8                    11/18/2017   11/18/2026   Common Stock   2400.0     2400   D    
Stock Option (Right to Buy)   $36.95                    1/2/2019   1/2/2028   Common Stock   22200.0     22200   D    
Stock Option (Right to Buy)   $41.37                    3/11/2020   3/11/2029   Common Stock   91000.0     91000   D    

Explanation of Responses:
(1)  This transaction was executed in multiple trades at prices ranging from $47.63 to $47.88. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Wakefield Stephen E
2425 SOUTH YUKON
TULSA, OK 74107

VP, Engineering

Signatures
Stephen E Wakefield 5/9/2019
** Signature of Reporting Person Date

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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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