Private company

PIONEER ENERGY SERVICES LLC

American drilling oil and gas wells company based in San Antonio. Summary from the record

Last updated Oct 21, 2026.

Overview

IndustryDrilling Oil & Gas Wells²
HeadquartersSan Antonio, United States²
Legal formCorporation²
LEI529900NHYED469G7XK29²
StatusActive²
LEI statusLapsed (not renewed)²
Registered addressSuite 1000, 1250 North East Loop 410, 78209 San Antonio, United States²
Registered withCorporations Section (Texas Secretary of State), 0049751200²

See how the biggest companies compare on our leaderboards

Corporate structure

PIONEER ENERGY SERVICES LLC is part of a group headed by Patterson-UTI Energy, Inc. 76 entities, 17 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of PIONEER ENERGY SERVICES LLC

MSD Partners, L.P. Filed SC 13G/A on PIONEER ENERGY SERVICES LLC, latest Feb 14, 2023
Ascribe Capital LLC Filed SC 13G/A on PIONEER ENERGY SERVICES LLC, latest Feb 17, 2022
LOOMIS SAYLES & CO L P Filed SC 13G/A on PIONEER ENERGY SERVICES LLC, latest Nov 9, 2021
Strategic Income Management, LLC Filed SC 13G/A on PIONEER ENERGY SERVICES LLC, latest Oct 27, 2021

Patterson-UTI Energy, Inc Houston, Texas, United States
- PIONEER ENERGY SERVICES LLC San Antonio, Texas, United States
- Ambar Lone Star Fluid Services LLC Subsidiary · Texas, United States
- BEP Ulterra Holdings, Inc. Subsidiary · Delaware, United States
- BEP Ulterra Intermediate Holdings, Inc. Subsidiary · Delaware, United States
- Black Gold Oilfield Services Subsidiary · Ecuador
- Current Power Solutions, Inc. Subsidiary · Texas, United States
- Drilling Technologies 1 LLC Subsidiary · Delaware, United States
- Drilling Technologies 2 LLC Subsidiary · Delaware, United States
- ESP Completion Technologies SA Subsidiary · Panama
- Great Plains Oilfield Rental, L.L.C. Subsidiary · Oklahoma, United States
- Keane Group Holdings, LLC Subsidiary · Delaware, United States
- Keane International Holdings, LLC Subsidiary · Delaware, United States
- Keystone Rock & Excavation, L.L.C. Subsidiary · Oklahoma, United States
- KGH Intermediate Holdco I, LLC Subsidiary · Delaware, United States
- KGH Intermediate Holdco II, LLC Subsidiary · Delaware, United States
- Mobile Data Technologies Ltd. Subsidiary · Alberta, Canada
- MS Directional, LLC Subsidiary · Texas, United States
- NexTier Completion Solutions Inc. Subsidiary · Delaware, United States
- NexTier Holding Co. Subsidiary · Delaware, United States
- NexTier Integrated Services LLC Subsidiary · Delaware, United States
- NexTier International LLC Subsidiary · Delaware, United States
- NexTier Oilfield Solutions LLC Subsidiary · Delaware, United States
- Patterson - UTI International (Colombia) Ltda. S. de R.L. Sucursal Colombia Subsidiary · Colombia
- Patterson Petroleum LLC Subsidiary · Texas, United States
- Patterson-UTI Drilling Canada Limited Subsidiary · Nova Scotia, Canada
- and 50 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (1 companies). Each entity in the chart links to its source.

Leadership

Who has led PIONEER ENERGY SERVICES LLC, and when. Pick a name to see everywhere that person has worked.

Chief executive

President

Chief financial officer

Chief operating officer

2010201520202025

Chief executive officerMatthew S. Porter Oct 4, 2021 to Oct 4, 2021³
Chief executive officerStacy Locke Mar 13, 2006 to Jun 2, 2020⁴
PresidentMatthew S. Porter Oct 4, 2021 to Oct 4, 2021³
PresidentStacy Locke Mar 15, 2010 to Jun 2, 2020⁵
Chief financial officerLorne Phillips Feb 4, 2009 to Oct 4, 2021⁶
Chief financial officerJoyce M. Schuldt Jul 19, 2007 to Jul 20, 2007⁷
Chief financial officerWilliam D. Hibbetts Jan 9, 2006 to Mar 4, 2009⁸
Chief operating officerBrian L. Tucker Jan 28, 2019 to Oct 4, 2021⁹
Chief operating officerFranklin C. West Sep 2, 2008 to Mar 4, 2009¹⁰

Board members and other officers (23)

VP General CounselBryce Seki Jan 8, 2018 to Dec 2, 2020¹¹
EVP, Pres Production ServicesCarlos R. Pena Jan 29, 2018 to Jun 2, 2020¹²
EVP & Pres Drilling Svs. Div.Brian L. Tucker Jan 9, 2015 to May 2, 2018¹³
Sr VP Wireline & Coil TubingBill W. Bouziden Mar 10, 2015 to May 2, 2017¹⁴
Exec. VPFranklin C. West Sep 25, 2009 to Aug 15, 2014¹⁵
SVPWilliam D. Hibbetts Sep 25, 2009 to Mar 15, 2010¹⁶
Pres PPS Div of PDCJoseph Brooks Eustace Mar 5, 2008 to Feb 2, 2015¹⁷
Sr. VPDonald G. Lacombe Feb 27, 2006 to Sep 25, 2009¹⁸
Board memberCharles K. Thompson Jun 8, 2020 to Oct 4, 2021¹⁹
Board memberDavid Albert Johan Michael Coppe Jun 8, 2020 to Oct 4, 2021²⁰
Board memberJohn David Jacobi Jun 8, 2020 to Oct 4, 2021²¹
Board memberMatthew S. Porter Jun 8, 2020 to Oct 4, 2021²²
Board memberTamara Morytko Jul 2, 2019 to Jun 2, 2020²³
Board memberJohn M. Rauh Oct 7, 2008 to Jun 2, 2020²⁴
Board memberScott D. Urban Oct 7, 2008 to Jun 2, 2020²⁵
Board memberStacy Locke Mar 13, 2006 to Jun 2, 2020⁴
Board memberC. Robert Bunch Jun 16, 2006 to Jun 20, 2007²⁶
Board memberDean A. Burkhardt Jun 16, 2006 to Jun 2, 2020²⁷
Board memberJames M. Tidwell Jun 16, 2006 to Jun 20, 2007²⁸
Board memberMichael E. Little Jun 16, 2006 to Jun 16, 2006²⁹
Board memberMike F. Harness Jun 16, 2006 to Jun 20, 2007³⁰
General counselBryce Seki Jun 2, 2020 to Oct 4, 2021³¹
General counselCarlos R. Pena Oct 29, 2008 to May 2, 2017³²

Timeline

Oct 4, 2021New chief executive Matthew S. Porter becomes CEO³
Oct 4, 20218-K Ended a material agreement; Completed an acquisition or sale; Change to shareholders' rights³³
Mar 13, 2006New chief executive Stacy Locke becomes CEO⁴

Filings

15 filings to the SEC since October 2021: 1 major events, 7 insider forms, 4 large holders, 3 other. The latest 15:

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

MSD Partners, L.P.SC 13G/A, 1 filing Feb 14, 2023³⁴
Ascribe Capital LLCSC 13G/A, 1 filing Feb 17, 2022³⁵
LOOMIS SAYLES & CO L PSC 13G/A, 1 filing Nov 9, 2021³⁶
Strategic Income Management, LLCSC 13G/A, 1 filing Oct 27, 2021³⁷

Stakes it holds

PIONEER ENERGY SERVICES LLC has told the SEC it owns more than 5% of 1 company, latest first (Schedules 13D and 13G).

Patterson-UTI Energy, IncSC 13D/A Oct 5, 2021³⁸

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARPIONEER ENERGY SERVICES LLC filings on SEC EDGAR
2
GLEIFPIONEER ENERGY SERVICES LLC LEI record (529900NHYED469G7XK29)
3
SEC EDGARMatthew S. Porter, Chief executive officer
4
SEC EDGARStacy Locke, Chief executive officer
5
SEC EDGARStacy Locke, President
6
SEC EDGARLorne Phillips, Chief financial officer
7
SEC EDGARJoyce M. Schuldt, Chief financial officer
8
SEC EDGARWilliam D. Hibbetts, Chief financial officer
9
SEC EDGARBrian L. Tucker, Chief operating officer
10
SEC EDGARFranklin C. West, Chief operating officer
11
SEC EDGARBryce Seki, VP General Counsel
12
SEC EDGARCarlos R. Pena, EVP, Pres Production Services
13
SEC EDGARBrian L. Tucker, EVP & Pres Drilling Svs. Div.
14
SEC EDGARBill W. Bouziden, Sr VP Wireline & Coil Tubing
15
SEC EDGARFranklin C. West, Exec. VP
16
SEC EDGARWilliam D. Hibbetts, SVP
17
SEC EDGARJoseph Brooks Eustace, Pres PPS Div of PDC
18
SEC EDGARDonald G. Lacombe, Sr. VP
19
SEC EDGARCharles K. Thompson, Board member
20
SEC EDGARDavid Albert Johan Michael Coppe, Board member
21
SEC EDGARJohn David Jacobi, Board member
22
SEC EDGARMatthew S. Porter, Board member
23
SEC EDGARTamara Morytko, Board member
24
SEC EDGARJohn M. Rauh, Board member
25
SEC EDGARScott D. Urban, Board member
26
SEC EDGARC. Robert Bunch, Board member
27
SEC EDGARDean A. Burkhardt, Board member
28
SEC EDGARJames M. Tidwell, Board member
29
SEC EDGARMichael E. Little, Board member
30
SEC EDGARMike F. Harness, Board member
31
SEC EDGARBryce Seki, General counsel
32
SEC EDGARCarlos R. Pena, General counsel
33
SEC EDGAREnded a material agreement; Completed an acquisition or sale; Change to shareholders' rights
34
SEC EDGARMSD Partners, L.P. SC 13G/A on PIONEER ENERGY SERVICES LLC
35
SEC EDGARAscribe Capital LLC SC 13G/A on PIONEER ENERGY SERVICES LLC
36
SEC EDGARLOOMIS SAYLES & CO L P SC 13G/A on PIONEER ENERGY SERVICES LLC
37
SEC EDGARStrategic Income Management, LLC SC 13G/A on PIONEER ENERGY SERVICES LLC
38
SEC EDGARPIONEER ENERGY SERVICES LLC SC 13D/A on Patterson-UTI Energy, Inc