![Greg Armstrong](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Greg Armstrong
Founder at
PLAINS ALL AMERICAN PIPELINE, L.P.
Net worth: 506 M $ as of 31/05/2026
Profile
Mr. Greg L. Armstrong is a Chairman & Chief Executive Officer at PAA Natural Gas Storage LLC, a Lead Independent Director at NOV, Inc., a Non-Independent Director at Plains All American Pipeline LP, a Chairman of Federal Reserve Bank of Dallas, a Chairman, President & Chief Executive Officer at Plains Pipeline LP and a Member at The Council on Alcohol & Drugs Houston. He is on the Board of Directors at PAA GP Holdings LLC, Plains GP Holdings LP, BreitBurn GP LLC, NOV, Inc., Plains All American GP LLC, Plains All American Pipeline LP and Independent Petroleum Association of America. Mr. Armstrong was previously employed as a Chairman & Chief Executive Officer by PAA Natural Gas Storage LP, a Chairman & Chief Executive Officer by PNGS GP LLC, a Chairman & Chief Executive Officer by PAA GP LLC, a President, Chief Executive Officer & Director by Plains Resources, Inc., a Chairman by The National Petroleum Council, and a President & Chief Executive Officer by Vulcan Energy Corp. He also served on the board at Memorial Hermann Healthcare System, Maverick Natural Resources LLC, Varco International, Inc. and PAA/Vulcan Gas Storage LLC. He received his undergraduate degree from Southeastern Oklahoma State University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
Plains AAP LP
 Plains AAP LP Oil & Gas PipelinesIndustrial Services Provides crude oil transportation services 1.9% | 23/03/2026 | 11,514,570 ( 1.9% ) | 280 M $ | 31/05/2026 |
| 23/03/2026 | 4,492,268 ( 0.94% ) | 109 M $ | 31/05/2026 | |
| 23/03/2026 | 1,765,812 ( 0.89% ) | 43 M $ | 31/05/2026 | |
| 23/03/2026 | 1,508,418 ( 0.31% ) | 37 M $ | 31/05/2026 | |
| 23/03/2026 | 1,508,418 ( 0.21% ) | 34 M $ | 31/05/2026 | |
NOV INC. 0.03% | 20/05/2025 | 111,143 ( 0.03% ) | 2 M $ | 31/05/2026 |
Greg Armstrong active positions
| Companies | Position | Start |
|---|---|---|
| PLAINS ALL AMERICAN PIPELINE, L.P. | Founder | 01/01/1998 |
| PLAINS GP HOLDINGS, L.P. | Director/Board Member | 01/01/2020 |
Plains AAP LP
Plains AAP LP Oil & Gas PipelinesIndustrial Services Provides crude oil transportation services | Corporate Officer/Principal | - |
Federal Reserve System
 Federal Reserve System General GovernmentGovernment Federal reserve bank | Director/Board Member | - |
Memorial Hermann Health System
 Memorial Hermann Health System Hospital/Nursing ManagementHealth Services Provides general healthcare and physician services | Director/Board Member | - |
The Texas Business Hall of Fame Foundation
 The Texas Business Hall of Fame Foundation Investment Trusts/Mutual FundsMiscellaneous Engages in recognizing the accomplishments and contributions of Texas business leaders, to perpetuate and inspire the values of entrepreneurial spirit | Corporate Officer/Principal | - |
National Oilwell Varco Norway AS
 National Oilwell Varco Norway AS Oilfield Services/EquipmentIndustrial Services Manufactures and distributes oil and gas field machinery and equipment | Director/Board Member | 01/03/2005 |
Plains Pipeline LP
 Plains Pipeline LP Gas DistributorsUtilities Owns and operates midstream energy infrastructure & provides logistics services | Chief Executive Officer | - |
PAA GP Holdings LLC
 PAA GP Holdings LLC Oil & Gas PipelinesIndustrial Services Engages in transportation, storage, terminalling and marketing of crude oil and refined products | Director/Board Member | 01/01/2020 |
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Former positions of Greg Armstrong
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Training of Greg Armstrong
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
53
1st degree connections
28
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 28 |
|---|---|
Plains Resources, Inc.
 Plains Resources, Inc. Integrated OilEnergy Minerals Explores for oil and natural gas | Energy Minerals |
Varco International, Inc.
 Varco International, Inc. Oilfield Services/EquipmentIndustrial Services Manufactures oil drilling equipment | Industrial Services |
Plains All American Pipeline LP
 Plains All American Pipeline LP Oil & Gas PipelinesIndustrial Services Provides crude oil and natural gas liquids pipeline operation, transportation, terminalling and storage services | Industrial Services |
Plains Pipeline LP
Plains Pipeline LP Gas DistributorsUtilities Owns and operates midstream energy infrastructure & provides logistics services | Utilities |
Federal Reserve Bank of Dallas
 Federal Reserve Bank of Dallas General GovernmentGovernment Federal reserve bank | Government |
Maverick Natural Resources LLC
 Maverick Natural Resources LLC Integrated OilEnergy Minerals Engages in the exploitation and development of oil & natural gas properties | Energy Minerals |
BreitBurn GP LLC
 BreitBurn GP LLC Integrated OilEnergy Minerals Extracts crude petroleum and natural gas | Energy Minerals |
Plains GP Holdings LP
 Plains GP Holdings LP Oil & Gas PipelinesIndustrial Services Operates as a holding company which engages in oil transportation | Industrial Services |
PAA Natural Gas Storage LP
 PAA Natural Gas Storage LP Oil & Gas PipelinesIndustrial Services Provides natural gas storage services | Industrial Services |
PAA GP LLC
 PAA GP LLC Financial ConglomeratesFinance Provides investment services | Finance |
Plains AAP LP
Plains AAP LP Oil & Gas PipelinesIndustrial Services Provides crude oil transportation services | Industrial Services |
PNGS GP LLC
 PNGS GP LLC Engineering & ConstructionIndustrial Services Operates, develops and manages natural gas storage facilities | Industrial Services |
Vulcan Energy Corp.
 Vulcan Energy Corp. Oil & Gas ProductionEnergy Minerals Provides upstream and midstream oil and gas services | Energy Minerals |
NOV, Inc.
 NOV, Inc. Oilfield Services/EquipmentIndustrial Services Manufactures and supplies oil & gas drilling field machinery and equipment | Industrial Services |
Southeastern Oklahoma State University
 Southeastern Oklahoma State University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Memorial Hermann Healthcare System
 Memorial Hermann Healthcare System Hospital/Nursing ManagementHealth Services Provides general healthcare and physician services | Health Services |
Federal Reserve System
Federal Reserve System General GovernmentGovernment Federal reserve bank | Government |
Houston Zoo, Inc.
 Houston Zoo, Inc. Other Consumer ServicesConsumer Services Owns and operates a zoo | Consumer Services |
PAA/Vulcan Gas Storage LLC
 PAA/Vulcan Gas Storage LLC Financial ConglomeratesFinance Acquisition vehicle | Finance |
The National Petroleum Council
 The National Petroleum Council Miscellaneous Commercial ServicesCommercial Services Operates national petroleum council | Commercial Services |
Independent Petroleum Association of America
 Independent Petroleum Association of America Industrial SpecialtiesProcess Industries Manufactures oil and natural gas | Process Industries |
The Texas Business Hall of Fame Foundation
The Texas Business Hall of Fame Foundation Investment Trusts/Mutual FundsMiscellaneous Engages in recognizing the accomplishments and contributions of Texas business leaders, to perpetuate and inspire the values of entrepreneurial spirit | Miscellaneous |
The Council on Alcohol & Drugs Houston
 The Council on Alcohol & Drugs Houston Hospital/Nursing ManagementHealth Services Provides drug and alcohol addiction treatment services | Health Services |
Plains All American GP LLC
 Plains All American GP LLC Oil & Gas PipelinesIndustrial Services Transports and markets crude oil and all other petroleum products | Industrial Services |
Memorial Hermann Health System
Memorial Hermann Health System Hospital/Nursing ManagementHealth Services Provides general healthcare and physician services | Health Services |
PAA Natural Gas Storage LLC
 PAA Natural Gas Storage LLC Other TransportationTransportation Develops and operates natural gas storage facilities | Transportation |
National Oilwell Varco Norway AS
National Oilwell Varco Norway AS Oilfield Services/EquipmentIndustrial Services Manufactures and distributes oil and gas field machinery and equipment | Industrial Services |
PAA GP Holdings LLC
PAA GP Holdings LLC Oil & Gas PipelinesIndustrial Services Engages in transportation, storage, terminalling and marketing of crude oil and refined products | Industrial Services |
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