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 *

LOCKE STACY 		2. Issuer Name and Ticker or Trading Symbol

PIONEER ENERGY SERVICES CORP [ PES ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
President & CEO
(Last)          (First)          (Middle)

1250 N E LOOP 410 #1000 		3. Date of Earliest Transaction (MM/DD/YYYY)

4/29/2019
(Street)

SAN ANTONIO, TX 78209
(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   4/29/2019     M    743316   A   (1) 1877568   D    
Common Stock   4/29/2019     D    743316   D $1.60   1134252   D    
Common Stock                  25000   (2) I   By 2010 Trust  
Common Stock                  180334   I   By Locke Children's Trust  

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
Phantom Stock Units     (1) 4/29/2019     M         743316    4/29/2019   4/29/2019   Common Stock   743316     (1) 0   D    

Explanation of Responses:
(1)  ) Represents the cash settlement of a performance-based phantom stock unit award with a grant date of January 28, 2016 (the "Grant Date"). Each phantom stock unit award is the economic equivalent of one share of the Company's common stock. The phantom stock unit awards were payable in cash or stock at the election of the Company. The cash payment is based upon the lesser of (i) the average for the last 14 trading days in December 2018 of the closing sale price of the Company's common stock or (ii) $8.08. No shares of common stock were actually issued, converted or sold in connection with this transaction.
(2)  The reporting person is the sole trustee and primary beneficiary of the Wm Stacy Locke Trust of 2010 (the "2010 Trust").

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
LOCKE STACY
1250 N E LOOP 410 #1000
SAN ANTONIO, TX 78209 		X
President & CEO

Signatures
Bryce Seki, Attorney-in-fact for Wm. Stacy Locke 4/30/2019
** 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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