Exhibit 99
Joint Filer Information
Each of the following joint filers has designatedCrestview Partners III GP, L.P.as the “Designated Filer” for purposes of the attached Form 4:
| 1. | Crestview III USWS TE, LLC c/o Crestview Partners 590 Madison Avenue, 36th Floor New York, NY 10022 |
| 2. | Crestview III USWS, L.P. c/o Crestview Partners 590 Madison Avenue, 36th Floor New York, NY 10022 |
| 3. | Adam J. Klein c/o Crestview Partners 590 Madison Avenue, 36th Floor New York, NY 10022 |
Date of Event Requiring Statement:May 24, 2019
Issuer Name and Ticker or Trading Symbol:U.S. Well Services, Inc. [USWS]
Crestview III USWS TE, LLC
| By: | /s/ Ross A. Oliver |
| Name: Ross A. Oliver | |
| Title: General Counsel |
Crestview III USWS, L.P.
By: Crestview III USWS GenPar, LLC
| By: | /s/ Ross A. Oliver |
| Name: Ross A. Oliver | |
| Title: General Counsel |
Adam J. Klein
| By: | /s/ Ross A. Oliver, as Attorney-in-Fact |
Date: May 29, 2019