UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

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

ABRAXAS PETROLEUM CORPORATION

(Name of Registrant as Specified in its Charter)

Payment of Filing Fee (Check the appropriate box):

☒	No fee required.
☐	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	1.	Title of each class of securities to which transaction applies:
	2.	Aggregate number of securities to which transaction applies:
	3.	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11:
	4.	Proposed maximum aggregate value of transaction:
	5.	Total fee paid:
☐	Fee paid previously with preliminary materials.
☐	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	1.	Amount Previously Paid:
	2.	Form, Schedule or Registration Statement No.:
	3.	Filing Party:
	4.	Date Filed:

**** IMPORTANT REMINDER ****

Dear Fellow Abraxas Petroleum Corporation Stockholder:

By now, you should have received your proxy material for the Annual Meeting of Stockholders of Abraxas Petroleum Corporation, which is scheduled to be held on July 13, 2021.

Each stockholder’s vote is extremely important. There are six proposals on the agenda and your Board recommends that you vote in favor of each proposal.

PLEASE VOTE TODAY

The fastest and easiest way to vote is by telephone or over the Internet. Instructions on how to vote your shares over the telephone or Internet are enclosed with this letter.

If you have questions or need help voting your shares, please call our proxy solicitation firm, Morrow Sodali LLC, at 1-800-607-0088.

Thank you for your investment in Abraxas Petroleum Corporation and taking the time to vote your shares.

Sincerely,

Robert L.G. Watson

Chairman of the Board, President,

and Chief Executive Officer