Form 8-K

8-K — Ascent Solar Technologies, Inc.

Accession: 0001079973-26-000881

Filed: 2026-06-26

Period: 2026-06-26

CIK: 0001350102

SIC: 3674 (SEMICONDUCTORS & RELATED DEVICES)

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — asti_8k.htm (Primary)

EX-5.1 — OPINION OF CARROLL LEGAL LLC (ex5x1.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K — FORM 8-K

8-K (Primary)

Filename: asti_8k.htm · Sequence: 1

false

0001350102

2026-06-26

iso4217:USD

xbrli:shares

iso4217:USD

xbrli:shares

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): June 26,

2026

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 8.01. Other Events.

As previously disclosed,

on 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 &

Co., LLC, as sales agent (“Wainwright”), to sell shares of its common stock, par value $0.0001 per share (the “Shares”),

with an aggregate sales price of initially up to $4,219,000, from time to time, through an “at the market offering” program.

As previously disclosed,

pursuant to prospectus supplements dated May 23, 2024, May 30, 2024 and August 20, 2025, to our shelf registration statement on Form S-3 (File No. 333-267971) initially

filed by the Company with the U.S. Securities and Exchange Commission (the “SEC”) on October 21, 2022, and declared effective

by the SEC on November 7, 2022 (the “Initial Registration Statement”), the Company increased the amount available for sale

under the ATM Agreement, up to an additional aggregate offering price of $4,344,000, $3,981,000 and $758,818 of Shares, respectively.

The Company has determined

to increase the amount available for sale under the ATM Agreement, up to an additional aggregate offering price of $15,000,000 of Shares.

The Shares will be issued pursuant to our shelf registration statement on Form S-3 (File No. 333-291104) initially filed by the Company

with the SEC on October 27, 2025, and declared effective by the SEC on December 30, 2025 (the “Registration Statement”) and

the related prospectus supplement (the “Prospectus Supplement”), dated June 26, 2026.

Because there is no minimum

offering amount required pursuant to the ATM Agreement, the total number of Shares to be sold under the ATM agreement, if any, and proceeds

to the Company, if any, are not determinable at this time. The Company expects to use any net proceeds primarily for general and administrative

expenses and other general corporate purposes. The Company’s management will have significant discretion and flexibility in applying

the net proceeds from the sale of 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 1,804,444 shares of common stock under the ATM Agreement for gross proceeds of approximately $12,657,279.56. The Company’s

current outstanding shares of common stock are 9,816,431 as of June 26, 2026.

Item 9.01. Financial Statements and Exhibits.

(d)

Exhibits

Exhibit

Number

Description

5.1

Opinion of Carrol Legal LLC, dated June 26, 2026

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.

June 26, 2026

By:

/s/ Jin Jo

Name: Jin Jo

Title: Chief Financial Officer

EX-5.1 — OPINION OF CARROLL LEGAL LLC

EX-5.1

Filename: ex5x1.htm · Sequence: 2

Exhibit 5.1

CARROLL LEGAL LLC

1449 Wynkoop Street

Suite 507

Denver, CO 80202

June 26, 2026

Ascent Solar Technologies, Inc.

12300 Grant Street

Thornton, Colorado 80241

Re: At-The-Market Offering

pursuant to Registration Statement on Form S-3

Ladies and Gentlemen:

We have acted as counsel to

Ascent Solar Technologies, Inc., a Delaware corporation (the “Company”), in connection with the sale through H.C. Wainwright &

Co., LLC (the “Manager”), as the sales agent, from time to time by the Company of shares of the common stock of the Company,

par value $0.0001 per share (the “Common Stock”), having an aggregate offering price of up to $15,000,000 (the “Shares”),

to be issued pursuant to a registration statement on Form S-3 initially filed by the Company with the Securities and Exchange

Commission (the “Commission”) on October 27, 2026 (File No. 333-291104) (as amended, the “Registration Statement”),

the base prospectus, dated December 30, 2025, included in the Registration Statement (the “Base Prospectus”) and the prospectus

supplement, dated June 26, 2026, filed with the Commission pursuant to Rule 424(b) of the Securities Act of 1933, as amended (the “Act”)

(the “Prospectus Supplement” and together with the Base Prospectus, the “Prospectus”), and that certain At

The Market Offering Agreement, dated as of May 16, 2024, by and between the Company and the Manager (the “Offering Agreement”).

This opinion is being furnished

in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as

to any matter pertaining to the contents of the Registration Statement or the Prospectus, other than as expressly stated herein with respect

to the issue of the Shares.

You have requested our opinion

as to the matters set forth below in connection with the Registration Statement and the Offering Agreement. For purposes of rendering

the opinion set forth below, we have examined such documents and reviewed such questions of law as we have considered necessary and appropriate

for the purposes of our opinion including (i) the Registration Statement, including the exhibits filed therewith, (ii) the Base Prospectus,

(iii) the Prospectus Supplement, (iv) the Company’s amended and restated certificate of incorporation, as amended (the “Certificate

of Incorporation”), (v) the Company’s second amended and restated bylaws, as amended, (vi) the Offering Agreement, and (vii)

the corporate resolutions and other actions of the Company that authorize and provide for the filing of the Prospectus Supplement and

the issuance of the Shares pursuant thereto and the Offering Agreement, and we have made such other investigation as we have deemed appropriate.

We have not independently established any of the facts so relied on.

For purposes of this opinion

letter, we have assumed the accuracy and completeness of each document submitted to us, the genuineness of all signatures on original

documents, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted

to us as facsimile, electronic, certified, conformed or photostatic copies thereof, and the due execution and delivery of all documents

where due execution and delivery are prerequisites to the effectiveness thereof. We have further assumed the legal capacity of natural

persons, that persons identified to us as officers of the Company are actually serving in such capacity, that the representations of officers

and employees of the Company are correct as to questions of fact, that the board of directors will have taken all action necessary to

set the issuance price of the Shares to be offered and sold and that each party to the documents we have examined or relied on (other

than the Company) has the power, corporate or other, to enter into and perform all obligations thereunder and also have assumed the due

authorization by all requisite action, corporate or other, the execution and delivery by such parties of such documents, and the validity

and binding effect thereof on such parties. We have not independently verified any of these assumptions.

The opinions expressed in

this opinion letter are limited to the General Corporation Law of the State of Delaware (the “DGCL”) and the applicable statutory

provisions of the Delaware Constitution and the reported judicial decisions interpreting such statute and provisions and, solely in connection

with the opinion given below. We are not opining on, and we assume no responsibility for, the applicability to or effect on any of the

matters covered herein of (a) any other laws; (b) the laws of any other jurisdiction; or (c) the laws of any county, municipality or other

political subdivision or local governmental agency or authority.

Based on the foregoing and

in reliance thereon, and subject to the assumptions, qualifications, limitations and exceptions set forth below, we are of the opinion

that:

The Shares have been duly authorized by all requisite corporate action on the part of the Company, and when the Shares are issued and paid for as described in the Prospectus in accordance with the terms of the Offering Agreement, the Shares will be validly issued, fully paid and non-assessable.

In rendering the foregoing

opinion, we have assumed that (i) the Company will comply with all applicable notice requirements regarding uncertificated shares provided

in the DGCL and (ii) upon the issue of any of the Shares, the total number of shares of Common Stock issued and outstanding will not exceed

the total number of shares of Common Stock that the Company is then authorized to issue under its Certificate of Incorporation.

We hereby consent to the filing

of this opinion with the Commission as Exhibit 5.1 to the Company’s Current Report on Form 8-K being filed on the date hereof and

incorporated by reference in the Prospectus. We also hereby consent to the reference to our firm under the heading “Legal Matters”

in the Prospectus and in each case in any amendment or supplement thereto. In giving this consent, we do not thereby admit that we are

within the category of persons whose consent is required under Section 7 and Section 11 of the Act, or the rules and regulations of the

Commission promulgated thereunder, nor do we admit that we are experts with respect to any part of the Prospectus within the meaning of

the term “expert” as used in the Act or the related rules and regulations of the Commission promulgated thereunder.

Yours truly,

CARROLL LEGAL LLC

By: /s/ James H. Carroll

Name: James H. Carroll

Title: Managing Member

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 7

v3.26.1

Cover

Jun. 26, 2026

Cover [Abstract]

Document Type

8-K

Amendment Flag

false

Document Period End Date

Jun. 26, 2026

Entity File Number

001-32919

Entity Registrant Name

ASCENT SOLAR

TECHNOLOGIES, INC.

Entity Central Index Key

0001350102

Entity Tax Identification Number

20-3672603

Entity Incorporation, State or Country Code

Entity Address, Address Line One

12300 Grant Street

Entity Address, City or Town

Thornton

Entity Address, State or Province

Entity Address, Postal Zip Code

80241

City Area Code

(720)

Local Phone Number

872-5000

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Common

Trading Symbol

ASTI

Security Exchange Name

NASDAQ

Entity Emerging Growth Company

false

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration