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 * ASBJORNSON NORMAN H 2. Issuer Name and Ticker or Trading Symbol AAON, INC. [ AAON ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)__X__ Director                    __X__ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Executive Chairman
(Last)         (First)         (Middle)
AAON INC, 2425 SOUTH YUKON
3. Date of Earliest Transaction (MM/DD/YYYY)
3/11/2021
(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  3/11/2021    F    480  D $73.36  8542017  D   
Common Stock, par value $.004  3/11/2021    A    1575 (1) A $0  8543592  D   
Common Stock, par value $.004                 154000  I  Private Foundation 
Common Stock, par value $.004                 554494  I  Trustee of trusts 
Common Stock, par value $.004                 7314  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 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)  $23.57                  2/26/2016  2/26/2025  Common Stock  38320.0    38320  D   
Stock Option (Right to Buy)  $20.92                  1/26/2017  1/26/2026  Common Stock  34990.0    34990  D   
Stock Option (Right to Buy)  $34.4                  2/22/2018  2/22/2027  Common Stock  35870.0    35870  D   
Stock Option (Right to Buy)  $36.95                  1/2/2019  1/2/2028  Common Stock  115700.0    115700  D   
Stock Option (Right to Buy)  $41.37                  3/11/2020  3/11/2029  Common Stock  190000.0    190000  D   
Stock Option (Right to Buy)  $44.22                  3/11/2021  3/11/2030  Common Stock  78880.0    78880  D   
Stock Option (Right to Buy)  $73.36                  3/11/2022  3/11/2031  Common Stock  10953.0 (1)   10953  D   

Explanation of Responses:
(1)  This stock award is granted under the Issuer's 2016 Long Term Incentive Plan and vests or is exercisable ratably on each of the first three anniversaries of the date of the grant.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
ASBJORNSON NORMAN H
AAON INC
2425 SOUTH YUKON
TULSA, OK 74107
X X Executive Chairman

Signatures
Norman H. Asbjornson 3/15/2021
**Signature of Reporting Person Date
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