Exhibit 99.1
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, $0.01 par value per share, of Quantum Corporation, a Delaware corporation. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.
Dated: December 28, 2015
| VIEX Opportunities Fund, LP – Series One |
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| By: | VIEX GP, LLC General Partner |
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| By: | /s/ Eric Singer |
| | Name: | Eric Singer |
| | Title: | Managing Member |
| VIEX Opportunities Fund, LP – Series Two | |
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| By: | VIEX GP, LLC General Partner |
| | | |
| By: | /s/ Eric Singer | | |
| | Name: | Eric Singer | | |
| | Title: | Managing Member | | |
| VIEX GP, LLC |
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| By: | /s/ Eric Singer |
| | Name: | Eric Singer |
| | Title: | Managing Member |
| VIEX Special Opportunities Fund III, LP |
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| By: | VIEX Special Opportunities GP III, LLC General Partner |
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| By: | /s/ Eric Singer |
| | Name: | Eric Singer |
| | Title: | Managing Member |
| VIEX Special Opportunities GP III, LLC |
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| By: | /s/ Eric Singer |
| | Name: | Eric Singer |
| | Title: | Managing Member |
| VIEX Capital Advisors, LLC |
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| By: | /s/ Eric Singer |
| | Name: | Eric Singer |
| | Title: | Managing Member |
| /s/ Eric Singer |
| Eric Singer |