Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*

(Last) (First) (Middle)
SUITE 1500


(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Quanex Building Products CORP [ NX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
4. If Amendment, Date of Original Filed (Month/Day/Year)
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. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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 (Month/Day/Year) 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: 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
Phantom Stock Units (1) 08/26/2020 A(2) 1,095.953 (1) (1) Common Stock 1,095.953 $16.31 27,604.5438(3) D
Explanation of Responses:
1. Each Phantom Stock Unit is the economic equivalent of one share of common stock. Distributions under the Deferred Compensation Plan are made in cash beginning on a specified date selected by the participant or upon the participant's death, disability, or termination of service as a director.
2. Units credited to the participant's account under the Deferred Compensation Plan as a result of deferral of Director Compensation.
3. Includes 151.905 phantom stock units that are credited to the participant's account as a result of automatic dividend reinvestment.
/s/ Paul B. Cornett, Power of Attorney 08/28/2020
** 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 Number.
Quanex Building Products Corporation
Power of Attorney

       The undersigned hereby constitutes and appoints Paul Cornett, Kevin
Delaney, and Brent Korb his true and lawful attorneys-in-fact and agents,
with full power of substitution and re-substitution, for him and in his
name, place and stead, in any and all capacities, to complete and sign
all Form 3s, Form 4s and Form 5s relating to equity securities of Quanex
 Building Products Corporation and to file the same, with all exhibits
thereto or documents in connection therewith, with the Securities and
Exchange Commission, the New York Stock Exchange and Quanex Building
Products Corporation, granting to said attorney-in-fact and agent, full
power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully
to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorney-in-fact and agent, or
substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

Executed this 28th day of August, 2013.

/s/ Robert R. Buck
Robert R. Buck