Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
BIAO XU
  2. Issuer Name and Ticker or Trading Symbol
Ascent Solar Technologies, Inc. [ASTI]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
12300 GRANT STREET
3. Date of Earliest Transaction (Month/Day/Year)
05/19/2016
(Street)

THORNTON, CO 80241
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock (1) 05/19/2016(1)   A   1,000,000 A $ 0 1,000,000 (2) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Common Stock Option (Right to Buy) $ 1.01             02/11/2015 02/11/2025 Common Stock 100,000   100,000 D  
Common Stock Option (Right to Buy) $ 0.06             03/10/2016 03/10/2026 Common Stock 100,000   200,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BIAO XU
12300 GRANT STREET
THORNTON, CO 80241
  X      

Signatures

 /s/ James H. Carroll, Attorney-in-Fact   05/23/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Mr. Xu was granted 1,000,000 restricted stock units on March 10, 2016, subject to and contingent upon receipt of stockholder approval in accordance with Sections 9 and 10 of the Issuer's Restricted Stock Plan. The stockholders approved the restricted stock unit grant on May 19, 2016. Each unit represents a contingent right to receive one share of common stock of the Issuer. Restricted stock units vest as follows: 50% on September 10, 2016 and 50% on March 10, 2017.
(2) Does not include shares held by TFG Radiant Investment Group Ltd. ("TFG Radiant"), which is the Issuer's largest stockholder. Mr. Xu is an investor in TFG Radiant and disclaims beneficial ownership of shares held by TFG Radiant (except to the extent of his pecuniary interest therein).
 
Remarks:
Xu Biao (aka Winston Xu) is a Board designee of TFG Radiant pursuant to the Amended and Restated Stockholders' Agreement between the Issuer and TFG Radiant, dated December 30, 2011.

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