List of companies based in Tulsa, Oklahoma

Companies headquartered in Tulsa, Oklahoma

This list is very out of date and incomplete.

Largest Companies

ONEOK - Fortune 500 (312)
Williams Companies - Fortune 500 (367)
Dollar-Thrifty Automotive Group - Fortune 1000 (958) - Purchased by Hertz and Jobs moved from Tulsa.
Semgroup
QuikTrip - Fortune's Largest Private Companies (33)
Vanguard Automotive Group:Alamo, National Purchased by Enterprise. Most jobs moved to St. Louis or eliminated. Small/Growing Shared Service Center remains.

AAON
Bama Pie
BOK Financial Corporation, parent company of Bank of Oklahoma, Bank of Texas and 4 other bank subsidiaries
Bluefin Payment Systems
Casillas Petroleum
Crane Carrier Corporation
ENGlobal Corporation
Enovation Controls
Explorer Pipeline
Facet International
FlightSafety International (Simulation Systems Division)
Rubbean Construction Company
GasTech Engineering Corporation
Helmerich & Payne, Inc., oil and gas exploration, and real-estate holding company
Hilti USA - Moved most of it's operation to Dallas.
John Zink Co.
Kenco Engineering
Lowrance Electronics
Lufthansa Technik Tulsa
Magellan Midstream Partners, L.P.
Manhattan Construction Company
Matrix Services
Mazzio’s
McElroy Manufacturing, Inc.
Nordam Group
Plymouth Pharmaceuticals
Public Service Company of Oklahoma a subsidiary of American Electric Power
RibCrib
Saint Francis Health System
Skycam
SmartMax Software
Syntroleum
Samson Investment Company, petroleum production and exploration company
TD Williamson
Unit Corp
Webco Industries
Winnercomm
Xcel Energy
Xeta Technologies
ZFG Mortgage
Leinbach Company