Oasis Petroleum Inc.

Specialized Disclosure Report

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

Automatic Shelf Registration

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Specialized Disclosure Report (amendment)

Specialized Disclosure Report

Regulation FD Disclosure

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Entry into a Material Definitive Agreement

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Regulation FD Disclosure

Regulation FD Disclosure

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

1.01,2.03,9.01

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Specialized Disclosure Report

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

No description available

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Automatic Shelf Registration

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration of Securities on Exchange (amendment)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Notice of Effectiveness

Prospectus Supplement for Primary Offering

Correspondence with the SEC

Registration statement under Securities Act of 1933 (amendment)

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

Written communication about a business combination transaction (Rule 425)

Registration statement under Securities Act of 1933

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Notification of the removal from listing and registration of matured redeemed or retired securities

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

McKinney Samantha

McKinney Samantha

Brown Daniel E

Brown Daniel E

Brown Daniel E

Kinney Shannon Browning

McKinney Samantha

Kinney Shannon Browning

McKinney Samantha

Brooks Douglas E

Brooks Douglas E

Kinney Shannon Browning

Lou Michael H

Lou Michael H

Dundas Ian C

Henke Darrin J.