SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	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* Makaira Partners LLC (Last) (First) (Middle) 7776 IVANHOE AVENUE #250 (Street) LA JOLLA CA 92037 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Wesco Aircraft Holdings, Inc [ WAIR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner Officer (give title below) X Other (specify below) Former 10% Owner
	3. Date of Earliest Transaction (Month/Day/Year) 08/16/2019
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X 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
Common Stock	08/16/2019		J(1)		3,859,178	D	(1)	6,958,250	I	See footnote(2)
Common Stock								29,859	I	See footnote(3)
Common Stock								35,533	I	See footnote(4)
Common Stock								49,200	I	See footnote(5)

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

1. Name and Address of Reporting Person* Makaira Partners LLC (Last) (First) (Middle) 7776 IVANHOE AVENUE #250 (Street) LA JOLLA CA 92037 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) Former 10% Owner

1. Name and Address of Reporting Person* Bancroft Thomas (Last) (First) (Middle) C/O WESCO AIRCRAFT HOLDINGS, INC. 24911 AVENUE STANFORD (Street) VALENCIA CA 91355 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. On August 16, 2019, Makaira Partners LLC ceased to have authority over (and thus ceased to have beneficial ownership for purposes of Sections 13 and 16 of the Exchange Act of) 3,859,178 shares of Common Stock that were held in a client separate account managed by Makaira Partners LLC as investment adviser.

2. By Makaira Partners LLC. Thomas Bancroft is the Managing Member, Portfolio Manager and Chief Investment Officer of Makaira Partners LLC. Each of Makaira Partners LLC and Mr. Bancroft disclaims beneficial ownership for purposes of Section 16 of the Exchange Act of all securities reported herein, except to the extent of its or his pecuniary interest therein.

3. By Mr. Bancroft. Mr. Bancroft is the Managing Member, Portfolio Manager and Chief Investment Officer of Makaira Partners LLC. Makaira Partners LLC disclaims beneficial ownership of such shares and disclaims membership in a group with Mr. Bancroft.

4. By family members of Mr. Bancroft. Mr. Bancroft disclaims beneficial ownership for purposes of Section 16 of the Exchange Act of all securities reported herein, except to the extent of his pecuniary interest therein. Makaira Partners LLC disclaims beneficial ownership of such shares and disclaims membership in a group with Mr. Bancroft.

5. By Mr. Bancroft's IRA. Makaira Partners LLC disclaims beneficial ownership of such shares and disclaims membership in a group with Mr. Bancroft.

Remarks:

	Makaira Partners LLC, by: /s/ Adam Garcia, Chief Financial Officer and Chief Compliance Officer 08/20/2019 /s/ Thomas Bancroft 08/20/2019	08/20/2019
	** 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).
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