Designated Filer:

Warburg Pincus Private Equity (E&P) X, Inc.

Issuer & Ticker Symbol:

Laredo Petroleum, Inc. [LPI]

Date of Event Requiring Statement:

March 5, 2015

Joint Filers:

1. Name:

Warburg Pincus Private Equity (E&P) X, Inc.

Address:

450 LEXINGTON AVENUE

New York, NY 10017

2. Name:

Warburg Pincus Private Equity (E&P) X-A, L.P.

Address:

450 LEXINGTON AVENUE

New York, NY 10017

3. Name:

Warburg Pincus Private Equity (E&P) X-B, L.P.

Address:

450 LEXINGTON AVENUE

New York, NY 10017

4. Name:

Warburg Pincus (E&P) X, L.P.

Address:

450 LEXINGTON AVENUE

New York, NY 10017

5. Name:

Warburg Pincus (E&P) X, LLC

Address:

450 LEXINGTON AVENUE

New York, NY 10017

6. Name:

Warburg Pincus Partners (E&P) LLC

Address:

450 LEXINGTON AVENUE

New York, NY 10017

7. Name:

Warburg Pincus & Company US, LLC

Address: 450 LEXINGTON AVENUE

New York, NY 10017