Company News
Who We Are
History
Strategy
Management
Board of Directors
Investor Information
Presentations and Reports
SEC Filings
Stock Information
Governance
Shareholder Services
Calendar of Events
Information Request
Email Alerts
Subsidiaries
Unit Drilling Company
Unit Petroleum Company
Superior Pipeline Company
Careers
News
50-Year Video
Contact Us
Restructuring
SEC Filings
Overview
|
Press Releases
|
Detailed Quote
|
SEC Filings
Email Alert
|
Request Info
|
Company Website
Filings:
All filings
10-K Annual Reports
10-Q Quarterly Reports
8-K Current Reports
Proxy Statements
Section 16 Forms 3, 4 & 5
Statement of acquisition
Exclude Forms 3, 4 & 5
Year:
All
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
Date
Form
Description
View
7/7/1998
4
Statement of Changes in Beneficial Ownership
5/6/1998
10-Q
Quarterly Report
4/22/1998
4
Statement of Changes in Beneficial Ownership
4/8/1998
4
Statement of Changes in Beneficial Ownership
3/24/1998
DEF 14A
Proxy Statement (definitive)
3/23/1998
10-K
Annual Report
2/19/1998
424B3
Prospectus [Rule 424(b)(3)]
2/12/1998
SC 13G
Statement of Ownership
2/10/1998
SC 13G
Statement of Ownership
2/9/1998
4
Statement of Changes in Beneficial Ownership
1/30/1998
5
Annual Statement of Changes in Beneficial Ownership
1/30/1998
5
Annual Statement of Changes in Beneficial Ownership
1/30/1998
5
Annual Statement of Changes in Beneficial Ownership
1/30/1998
5
Annual Statement of Changes in Beneficial Ownership
1/5/1998
3
Initial Statement of Beneficial Ownership
1/2/1998
4
Statement of Changes in Beneficial Ownership
1/2/1998
4
Statement of Changes in Beneficial Ownership
12/18/1997
DEL AM
Delaying amendment
12/16/1997
S-3
Securities Registration Statement (simplified form)
12/8/1997
4
Statement of Changes in Beneficial Ownership
First
|
Previous
|
Next
|
Last
Privacy
Company News
