Ascent Solar Technologies, Inc. — Director's Dealing 2007

Dec 20, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Ascent Solar Technologies, Inc. (ASTI)
CIK: 0001350102
Period of Report: 2007-12-18

Reporting Person: Casteel Janet (Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-12-18	Common Stock	M	1000	$4.25	Acquired	18000	Direct
2007-12-18	Common Stock	S	1000	$17.48	Disposed	17000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-12-18	Common Stock Option (Right to Buy)	$4.25	M	1000	Disposed	2016-02-27	Common Stock (1000)	Direct

Footnotes

F1: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 26, 2007.

F2: Of the remaing unvested options in this grant, options to purchase 3,572 shares vest on March 31, 2008 and September 30, 2008, and options to purchase 3,568 shares vest on March 31, 2009.

F3: Following this transaction, Ms. Casteel holds the following securities: vested options to purchase 9,287 that expire on February 27, 2016; vested options (or options that will vest within 60 days) to purchase 7,000 shares of common stock that expire on November 18, 2015; unvested options to purchase 10,713 shares of common stock that expire on February 27, 2016; unvested options to purchase 6,000 shares of common stock that expire on November 18, 2015; and unvested options to purchase 7,500 shares of common stock that expire on December 3, 2017.