- Statement of Changes in Beneficial Ownership (4)

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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) 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 DRILLING CO [ PDC ]	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) 6/13/2012
(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	6/13/2012	6/13/2012	P		16602	A	$6.89	419303	D
Common Stock	6/14/2012	6/14/2012	P		8398	A	$6.96	427701	D

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
Employee stock option (right to buy)	$14.58							(2)	8/18/2015	Common stock	98000		98000	D
Employee stock option (right to buy)	$14.54							(2)	6/5/2016	Common stock	120000		120000	D
Employee stock option (right to buy)	$14.07							(2)	5/14/2017	Common stock	200000		200000	D
Employee stock option (Right to buy)	$17.07							(2)	8/28/2018	Common stock	180000		180000	D
Employee stock option (right to buy)	$3.84							(2)	3/2/2019	Common stock	236000		236000	D
Employee stock option (right to buy)	$8.86							(3)	2/2/2020	Common stock	181800		181800	D
Employee stock option (right to buy)	$9.01							(4)	2/2/2021	Common stock	155919		155919	D
Employee stock option (Right to buy)	$8.92							(1)	1/31/2022	Common stock	191697		191697	D

Explanation of Responses:
( 1)	The option becomes exercisable in three equal installments on January 31, 2013, 2014 and 2015.
( 2)	All options are fully exercisable at 06-14-2012.
( 3)	The options become exercisable in three equal installments on February 2, 2011, 2012 and 2013.
( 4)	The option becomes exercisable in three equal installments on February 2, 2012, 2013 and 2014.

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
Wm. Stacy Locke		6/14/2012
** 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.
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