ClearSign Technologies (NASDAQ: CLIR) back in Nasdaq bid compliance

Rhea-AI Filing Summary

ClearSign Technologies Corporation announced that it has regained compliance with Nasdaq’s minimum bid price requirement for continued listing on the Nasdaq Capital Market. Nasdaq confirmed that the company’s common stock closed at or above $1.00 per share for at least ten consecutive business days, satisfying Nasdaq Listing Rule 5550(a)(2). Nasdaq stated that the compliance matter is now closed, meaning ClearSign’s shares remain listed on the Nasdaq Capital Market.

Positive

• Regained Nasdaq bid price compliance, with ClearSign’s stock closing at or above $1.00 per share for at least ten consecutive business days, keeping its listing on the Nasdaq Capital Market and closing the prior compliance matter.

Negative

• None.

Insights

Equity Markets Analyst

ClearSign keeps its Nasdaq listing by restoring its share price above the $1.00 minimum.

ClearSign Technologies received confirmation from Nasdaq that its common stock again meets the $1.00 per share minimum bid price requirement for the Nasdaq Capital Market under Listing Rule 5550(a)(2). The stock maintained this level for at least ten consecutive business days, which is the key compliance test.

Maintaining a Nasdaq Capital Market listing helps preserve trading liquidity and market visibility for shareholders. The letter also notes that the compliance matter is closed, reducing near-term delisting risk based on bid price. Future compliance will still depend on the company’s share price performance over time.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Key Figures

Minimum bid price: $1.00 per share Compliance period: Ten consecutive business days

2 metrics

Minimum bid price $1.00 per share Nasdaq Listing Rule 5550(a)(2) requirement for continued listing

Compliance period Ten consecutive business days Required duration with closing bid at or above $1.00 per share

Key Terms

Nasdaq Capital Market, minimum bid price requirement, Nasdaq Listing Rule 5550(a)(2)

3 terms

Nasdaq Capital Market financial

"for continued listing on the Nasdaq Capital Market, as set forth in Nasdaq Listing Rule 5550(a)(2)"

The Nasdaq Capital Market is a platform where smaller, emerging companies can list their shares for trading by investors. It provides these companies with access to funding and visibility, helping them grow, much like a local marketplace where new vendors can introduce their products to potential customers. For investors, it offers opportunities to discover early-stage companies with growth potential.

minimum bid price requirement financial

"regained compliance with the minimum bid price requirement of $1.00 per share for continued listing"

A minimum bid price requirement is a rule that a stock must trade above a set price for a specified period to stay listed on an exchange. It matters to investors because falling below that threshold can trigger warnings or removal from the exchange, which can cut liquidity, reduce visibility, and often lead to sharper declines in share value—think of it like a venue’s minimum dress code that, if not met, can bar a performer from the stage.

Nasdaq Listing Rule 5550(a)(2) regulatory

"for continued listing on the Nasdaq Capital Market, as set forth in Nasdaq Listing Rule 5550(a)(2)"

Understanding 8-K Material Events →

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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): March 30, 2026

CLEARSIGN TECHNOLOGIES CORPORATION

(Exact name of registrant as specified in charter)

Delaware		001-35521		26-2056298
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

8023 E. 63rd Place, Suite 101

Tulsa, Oklahoma 74133

(Address of Principal Executive Offices and Zip Code)

(918) 236-6461

(Registrant's telephone number, including area code)

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 (see General Instruction A.2 below).

¨  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 CFR240.14a-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 240.13(e)-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		CLIR		The Nasdaq Stock Market LLC

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.

On March 30, 2026, ClearSign Technologies Corporation (the “Company”) received a letter from The Nasdaq Stock Market LLC stating that, because the Company’s common stock had a closing bid price at or above $1.00 per share for a minimum of ten (10) consecutive business days, the Company had regained compliance with the minimum bid price requirement of $1.00 per share for continued listing on the Nasdaq Capital Market, as set forth in Nasdaq Listing Rule 5550(a)(2), and that the matter is now closed.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.		Description
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

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

Dated: March 30, 2026

	CLEARSIGN TECHNOLOGIES CORPORATION
	By:	/s/ Colin James Deller
	Name:	Colin James Deller
	Title:	Chief Executive Officer

FAQ

What did ClearSign Technologies (CLIR) announce about its Nasdaq listing status?

ClearSign Technologies reported that Nasdaq confirmed the company has regained compliance with the minimum bid price requirement. Its common stock closed at or above $1.00 per share for at least ten consecutive business days, so the listing compliance matter is now considered closed.

What is the minimum bid price requirement ClearSign Technologies (CLIR) satisfied?

ClearSign met Nasdaq’s minimum bid price requirement of $1.00 per share for continued listing on the Nasdaq Capital Market. The company’s stock maintained a closing bid at or above this $1.00 level for at least ten consecutive business days, satisfying Nasdaq Listing Rule 5550(a)(2).

Which Nasdaq market is ClearSign Technologies (CLIR) listed on after this update?

ClearSign’s common stock remains listed on the Nasdaq Capital Market following confirmation of bid price compliance. By maintaining a closing bid price of at least $1.00 per share for the required ten consecutive business days, the company preserved its status on this Nasdaq marketplace.

What did Nasdaq communicate to ClearSign Technologies (CLIR) regarding compliance?

Nasdaq sent ClearSign a letter stating the company had regained compliance with the minimum $1.00 bid price rule after at least ten consecutive business days above that level. Nasdaq also indicated that the prior minimum bid price compliance matter is closed following this confirmation.

Which Nasdaq rule did ClearSign Technologies (CLIR) comply with on bid price?

ClearSign complied with Nasdaq Listing Rule 5550(a)(2), which sets the minimum bid price requirement of $1.00 per share for companies on the Nasdaq Capital Market. The company’s stock achieved this through closing bids at or above $1.00 for at least ten consecutive business days.

Filing Exhibits & Attachments

3 documents

Other Documents

• EX-101 XBRL TAXONOMY EXTENSION SCHEMA 2.9 KB
• EX-101 XBRL TAXONOMY EXTENSION LABEL LINKBASE 33.4 KB
• EX-101 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE 21.8 KB