| UNITED STATES |
| SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
| SCHEDULE 14A |
| (Rule 14a-101) |
| Schedule 14A Information |
| Proxy Statement Pursuant to Section 14(a) of the |
| Securities Exchange Act of 1934 |
Filed by the Registrant ☒
Filed by a Party other than the Registrant ☐
Check the appropriate box:
| ☐ | Preliminary Proxy Statement |
| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐ | Definitive Proxy Statement |
| ☒ | Definitive Additional Materials |
| ☐ | Soliciting Material Pursuant to §240.14a-12 |
| Astrotech Corporation |
| (Name of Registrant as Specified in Its Charter) |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |
Payment of Filing Fee (Check all boxes that apply):
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| ☐ | Fee paid previously with preliminary materials |
| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |
