UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 620, 2025

ASCENT SOLAR TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

Delaware		001-32919		20-3672603
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

12300 Grant Street
Thornton, CO	80241
(Address of principal executive offices)	(Zip Code)

	(720) 872-5000
	(Registrant’s telephone number, including area code)

Not Applicable

(Former name, or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		ASTI		Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7 8.01. Other ~~Regulation FD Disclosure~~Events.

OnAs ~~August~~previously 6disclosed, on ~~2025~~May 16, 2024, Ascent Solar Technologies, Inc., a Delaware corporation (“we,” “us,” the “Company” or “Ascent”), entered into an At The Market Offering Agreement (the “ATM Agreement”) with H.C. Wainwright & ~~published~~Co., LLC, as sales agent (“Wainwright”), to sell shares of its common stock, par value $0.0001 per share (the “Shares”), with an ~~updated~~aggregate ~~corporate~~sales ~~presentation~~price of initially up to $4,219,000, from time to time, through an “at the market offering” program.

AAs ~~copy~~previously ofdisclosed, pursuant to prospectus supplements dated May 23, 2024 and May 30, 2024, to our shelf registration statement on Form S-3 (File No. 333-267971) initially filed by the Company’s ~~press~~with ~~release~~the ~~summarizing~~U.S. Securities and Exchange Commission (the ~~presentation~~“SEC”) on October 21, 2022, and declared effective isby ~~furnished~~the asSEC ~~Exhibit~~on ~~99.1~~November 7, 2022 (the “Registration Statement”), the Company increased the amount available for sale under the ATM Agreement, up to ~~this~~an ~~Form~~additional ~~8-K~~aggregate offering price of $4,344,000 and ~~incorporated~~$3,981,000 ~~herein~~of byShares, ~~reference~~respectively.

AThe ~~copy~~Company ofhas determined to increase the ~~updated~~amount ~~corporate~~available ~~presentation~~for issale ~~furnished~~under asthe ~~Exhibit~~ATM ~~99.2~~ Agreement, up to ~~this~~an ~~Form~~additional ~~8-K~~aggregate ~~and~~offering ~~incorporated~~price ~~herein~~of by$758,818 of ~~reference~~Shares. The ~~corporate~~Shares ~~presentation~~ will ~~also~~ be ~~available~~issued onpursuant to our Registration Statement and the ~~Company’s~~related ~~website in~~prospectus supplement (the ~~Investors~~“Prospectus Supplement”), ~~section~~dated atAugust ~~https://ascentsolar~~20, 2025.~~com/investor-relations.~~

~~The~~Because ~~information~~there ~~contained~~is no inminimum ~~this~~offering ~~Item~~amount ~~7.01~~required ofpursuant ~~this~~to ~~current~~the ~~report~~ATM onAgreement, ~~Form 8-K and in~~ the ~~accompanying~~total ~~exhibits~~number ~~99.1~~of ~~and~~Shares ~~99.2~~to ~~shall not~~ be ~~incorporated~~sold byunder ~~reference into any filing of~~ the ~~Company~~ATM agreement, ~~whether~~if ~~made~~any, ~~before~~and orproceeds ~~after~~to the ~~date hereof~~Company, ~~regardless~~if of any, ~~general~~are ~~incorporation~~not ~~language~~determinable inat ~~such~~this ~~filing,~~time. ~~unless~~The ~~expressly~~Company ~~incorporated~~expects ~~by specific reference~~ to ~~such~~use ~~filing.~~any ~~This~~net ~~information,~~proceeds ~~including~~primarily ~~the~~for ~~exhibits 99.1~~ general and ~~99.2~~administrative ~~hereto,~~expenses ~~shall~~and ~~not~~other begeneral ~~deemed~~corporate ~~to be “filed” for~~ purposes. ofThe ~~Section~~Company’s 18management ofwill ~~the~~have ~~Securities~~significant ~~Exchange~~discretion ~~Act~~and flexibility ofin ~~1934,~~applying ~~or otherwise subject to~~ the ~~liabilities~~net ofproceeds ~~that~~from ~~section or Sections 11 and 12(a)(2) of~~ the ~~Securities~~sale ~~Act~~ of ~~1933~~these securities.

This Current Report does not constitute an offer to sell or the solicitation of an offer to buy any security nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

Attached hereto as Exhibit 5.1, and incorporated by reference to the Prospectus Supplement, is the opinion of Carroll Legal LLC relating to the legality of the issuance and sale of the Shares.

Since May 16, 2024, the Company has sold 1,537,783 shares of common stock under the ATM Agreement for gross proceeds of approximately $11,883,824.54. The Company’s current outstanding shares of common stock are 3,047,658 as of August 20, 2025.

Item 9.01. Financial Statements and Exhibits.

(d)	Exhibits
	Exhibit Number	Description
	99.1	Press Release, dated August 6, 2025
	5.1	Opinion of Carrol Legal LLC, dated August 20, 2025
	99.2	Corporate Presentation Dated August 2025
	23.1	Consent of Carroll Legal LLC (included in Exhibit 5.1)
	104	Cover Page Interactive Data File - the cover page iXBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ASCENT SOLAR TECHNOLOGIES, INC.
August 6, 2025	By:	/s/ Jin Jo
August 20, 2025	By:	/s/ Jin Jo
	Name:	Jin Jo
	Title:	Chief Financial Officer

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