ClearSign Technologies Corp — fact timeline

ClearSign Technologies Corp shareholders approved The approval of one or more adjournments of the Annual Meeting to a later date or dates to solicit additional proxies if there are insufficient votes to approve the A&R 2021 Plan or in the absence of a quorum (the “Adjournment Proposal”). at the 2026-06-08 meeting.

“Proposal 5 . The approval of one or more adjournments of the Annual Meeting to a later date or dates to solicit additional proxies if there are insufficient votes to approve the A&R 2021 Plan or in the absence of a quorum (the “Adjournment Proposal”). For Against Abstentions Broker Non-Votes 1,596,167 570,671 46,426 1,453,588 The stockholders approved the Adjournment Proposal.”

ClearSign Technologies Corp shareholders approved The approval, on an advisory basis, of the compensation paid to the Company’s named executive officers. at the 2026-06-08 meeting.

“Proposal 4 . The approval, on an advisory basis, of the compensation paid to the Company’s named executive officers. For Against Abstentions Broker Non-Votes 1,826,151 379,205 7,908 1,453,588 The stockholders approved, on an advisory basis, the compensation paid to the Company’s named executive officers.”

ClearSign Technologies Corp shareholders approved The approval of the amended and restated ClearSign Technologies Corporation 2021 Equity Incentive Plan (the “A&R 2021 Plan”). at the 2026-06-08 meeting.

“Proposal 3 . The approval of the amended and restated ClearSign Technologies Corporation 2021 Equity Incentive Plan (the “A&R 2021 Plan”). For Against Abstentions Broker Non-Votes 1,546,015 659,279 7,970 1,453,588 The stockholders approved the A&R 2021 Plan.”

ClearSign Technologies Corp shareholders approved The approval, on an advisory basis, of the appointment of BPM CPA LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026. at the 2026-06-08 meeting.

“Proposal 2 . The approval, on an advisory basis, of the appointment of BPM CPA LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026. For Against Abstentions 3,263,437 394,510 8,905 There were no broker non-votes on this proposal. The stockholders approved, on an advisory basis, the appointment of BPM CPA LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026.”

ClearSign Technologies Corp shareholders approved Election of Directors at the 2026-06-08 meeting.

“Proposal 1 . Election of Directors. Nominee Name For Against Abstentions Broker Non-Votes Louis J. Basenese 1,808,414 370,481 34,369 1,453,588 Colin James Deller 1,995,376 217,011 877 1,453,588 Anthony DiGiandomenico 1,775,452 418,786 19,026 1,453,588 G. Todd Silva 1,829,493 364,781 18,990 1,453,588 Each of the four nominees standing for re-election as a director was elected to serve on the Company’s board of directors until the election and qualification of his successor or until his earlier death, resignation, or removal.”

ClearSign Technologies Corp entered into Underwriting Agreement with Newbridge Securities Corporation valued at approximately $2.94 million (effective 2026-05-28).

“On May 28, 2026, ClearSign Technologies Corporation (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Newbridge Securities Corporation (the “Underwriter”), relating to a firm-commitment underwritten public offering”

ClearSign Technologies Corp reported financial results for the quarter ended March 31, 2026.

“ClearSign Technologies Corporation Provides First Quarter 2026 Update”

ClearSign Technologies Corp reported financial results for the fourth quarter and full year ended December 31, 2025.

“ClearSign Technologies Corporation Provides Fourth Quarter and Full Year 2025 Update Achieves Record Quarterly Revenue of $3.7 Million Annual Revenue Up 44% to Record $5.2 Million TULSA, Okla., April 9, 2026”

ClearSign Technologies Corp reported a fiscal year change.

“the information regarding the Reverse Stock Split (as defined below) set forth below in Item 5.03 of this Current Report on Form 8-K is incorporated by reference herein in its entirety.”

ClearSign Technologies Corp: Filed a charter amendment to effect a 1-for-10 reverse stock split (effective 2026-03-16).

“On March 6, 2026, ClearSign Technologies Corporation (the “Company”) filed an amendment (the “Charter Amendment”) to its certificate of incorporation, as amended, with the Secretary of State of Delaware to implement a 1-for-10 reverse stock split, such that every ten (10) shares of the Company’s common stock, par value $0.0001 per share (the “common stock”), will be combined into one (1) issued and outstanding share of common stock, with no change in the $0.0001 par value per share (the “Reverse Stock Split”).”

ClearSign Technologies Corp: Amended and restated bylaws to adopt majority voting for director elections and tighten advance notice procedures for stockholder proposals and nominations (effective 2025-11-11).

“On November 11, 2025, the Board of Directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) adopted Amended and Restated Bylaws of the Company (as amended and restated, the “A&R Bylaws”), effective on such date.”

ClearSign Technologies Corp received a nasdaq extension granted notice regarding minimum bid price (rules 5550(a)(2)).

“September 30, 2025, the Company received a second letter from Nasdaq granting the Company’s request for a 180-day extension to regain compliance with the Bid Price Rule. The Company now has until March 30, 2026, to meet the requirement. As part of the Company’s request for the 180-day extension, the Company notified Nasdaq that it intends to regain compliance with the Bid Price Rule by effecting a reverse stock split, if necessary. If at any time prior to March 30, 2026, the bid price of the Company’s common stock closes at $1 per share or more for a minimum of 10 consecutive business days, th”

ClearSign Technologies Corp received a nasdaq deficiency notice notice regarding board independence (rules 5605(b)(1), 5605(c)(2)(A)).

“August 8, 2025, ClearSign Technologies Corporation (the “Company”) received a notice (the “Notice”) from the Listing Qualifications Department of the Nasdaq Stock Market LLC (“Nasdaq”) stating that the Company is not in compliance with the board of directors independence requirement set forth in Nasdaq Listing Rule 5605(b)(1) and the audit committee composition requirement set forth in Nasdaq Listing Rule 5605(c)(2)(A) (collectively, the “Nasdaq Composition Requirements”) due to the resignations of Catharine M. de Lacy and Judith S. Schrecker (as described below) from the Company’s board of di”

Anthony DiGiandomenico was appointed as Director at ClearSign Technologies Corp.

“On the Effective Date, the Board increased the size of the Board from five to seven directors and appointed each New Director as a member of the Board, effective immediately”

Louis Basenese was appointed as Director at ClearSign Technologies Corp.

“On the Effective Date, the Board increased the size of the Board from five to seven directors and appointed each New Director as a member of the Board, effective immediately”

ClearSign Technologies Corp received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2), 5810(c)(3)(A)).

“April 1, 2025, ClearSign Technologies Corporation (the “Company”) received a letter (the “Notice”) from the Listing Qualifications Staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that, based upon the closing bid price of the Company’s common stock for the last 30 consecutive business days beginning on February 18, 2025, and ending on March 31, 2025, the Company no longer meets the requirement to maintain a minimum bid price of $1 per share, as set forth in Nasdaq Listing Rule 5550(a)(2). In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has been provide”

ClearSign Technologies Corp announced a restructuring with charges of approximately $400,000 to $500,000 affecting China operations (the termination of 2 employees).

“the Company estimates that it will incur approximately $400,000 to $500,000 of costs, primarily consisting of employee termination payments, as well as equipment disposal and shipment and legal filing fees.”

G. Todd Silva was appointed as Director at ClearSign Technologies Corp.

“Upon recommendation of the Governance Committee, and effective as of August 1, 2024 (the “Effective Date”), Mr. Silva was appointed to the Board as the SPV’s designee to fill the vacancy created by Mr. Hoffman’s resignation.”

Robert T. Hoffman, Sr. resigned as Director at ClearSign Technologies Corp.

“On June 16, 2024, Robert T. Hoffman, Sr., notified the board of directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) that he resigned from the Board, effective immediately.”

ClearSign Technologies Corp received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2), 5810(c)(3)(A)).

“May 2, 2024, ClearSign Technologies Corporation (the “Company”) received a letter (the “Notice”) from the Listing Qualifications Staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that, based upon the closing bid price of the Company’s common stock for the last 30 consecutive business days beginning on March 20, 2024 and ending on May 1, 2024, the Company no longer meets the requirement to maintain a minimum bid price of $1 per share, as set forth in Nasdaq Listing Rule 5550(a)(2). In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has been provided a perio”

ClearSign Technologies Corp reported year ended December 31, 2023 results: revenue $2.4 million.

“The Company reported $2.4 million revenue for the full year 2023 compared to $374 thousand for the comparable period in 2022.”

David M. Maley was appointed as Director at ClearSign Technologies Corp.

“Effective as of April 24, 2024 (the “Effective Date”), David M. Maley was appointed to the board of directors (the “Board”) of ClearSign Technologies Corporation (the “Company”), upon recommendation of the Board’s Nominating and Corporate Governance Committee, to fill the vacancy created by Mr. DiElsi’s resignation.”

ClearSign Technologies Corp entered into Securities Purchase Agreement with an accredited investor (effective 2024-04-19).

“On April 19, 2024, the Company entered into a securities purchase agreement (the “Securities Purchase Agreement”) with an accredited investor (“Private Purchaser”) whereby the Company will issue, in a private placement (the “Concurrent Private Offering”) to be completed concurrently with the completion of the Public Offering, an aggregate of (i) 5,405,405 shares of Common Stock (the “Private Shares”), and (ii) redeemable warrants (the “Private Warrants”) to purchase up to an aggregate of 8,108,108 shares of the Company’s common stock”

ClearSign Technologies Corp entered into Underwriting Agreement with Public Ventures, LLC valued at aggregate gross proceeds of $4,251,099 (effective 2024-04-19).

“On April 19, 2024, ClearSign Technologies Corporation, a Delaware corporation (the “Company”), entered into an underwriting agreement (the “Underwriting Agreement”) with Public Ventures, LLC (“Public Ventures”), as underwriter, relating to the offering, issuance and sale of an aggregate of (i) 4,620,760 shares of the Company’s common stock”

ClearSign Technologies Corp reported fiscal year ended December 31, 2023 results: revenue approximately $2.3 million, net income between $5.4 to $5.1 million.

“The Company's estimated preliminary revenues for the year ended December 31, 2023 was $2.3 million, compared to $374 thousand for the year ended December 31, 2022. Additionally, the Company reported a net loss of approximately $5.8 million for the year ended December 31, 2022, and estimates that the preliminary net loss for the year ended December 31, 2023 will range between $5.4 to $5.1 million.”

ClearSign Technologies Corp reported fourth quarter ended December 31, 2023 results: revenue approximately $1.2 million.

“Preliminary revenues for the three months ended December 31, 2023 was approximately $1.2 million, compared to $50 thousand for the comparable period in 2022.”

ClearSign Technologies Corp amended Stock Purchase Agreement with clirSPV LLC (effective 2023-12-30).

“On December 30, 2023, the Company received notice from clirSPV LLC that the holders of at least two-thirds of the outstanding units of clirSPV LLC agreed to extend the waiver of the Redemption Right until December 31, 2024.”

ClearSign Technologies Corp received a nasdaq deficiency notice notice regarding board independence (rules 5605(b)(1), 5605(c)(2)(A), 5605(a)(2), 5605(c)(4), 5605(b)(1)(A)).

“November 24, 2023, ClearSign Technologies Corporation (the “Company”) received a notice (the “Notice”) from the Listing Qualifications Department of the Nasdaq Stock Market LLC (“Nasdaq”) stating that the previously announced resignation of Gary DiElsi from the Company’s Board of Directors (the “Board”) resulted in noncompliance with the board of directors independence requirements set forth in Nasdaq Listing Rule 5605(b)(1) and the requirement in Nasdaq Listing Rule 5605(c)(2)(A) to have an audit committee of at least three independent directors. More specifically, when the Notice was issued”

ClearSign Technologies Corp reported the third quarter ended September 30, 2023 results: revenue approximately $85 thousand.

“The Company recognized approximately $85 thousand in revenue during the three months ended September 30, 2023, as compared to zero revenue for the same period of 2022.”

ClearSign Technologies Corp reported the second quarter ended June 30, 2023 results: revenue approximately $150 thousand.

“The Company recognized approximately $150 thousand in revenue during the three months ended June 30, 2023, as compared to zero revenue for the same period of 2022.”

ClearSign Technologies Corp shareholders approved Authorization to adjourn the Annual Meeting at the 2023-06-06 meeting.

“Proposal 5 . Authorization to adjourn the Annual Meeting. For Against Abstentions 25,143,904 2,543,318 193,646 There were no broker non-votes on this proposal. The shareholders approved the authorization to adjourn the Annual Meeting.”

ClearSign Technologies Corp shareholders approved Reincorporation from the State of Washington to the State of Delaware. at the 2023-06-06 meeting.

“Proposal 4 . Reincorporation from the State of Washington to the State of Delaware. For Against Abstentions Broker Non-Votes 19,537,600 48,017 45,981 8,249,270 The shareholders approved the Company's reincorporation from the State of Washington to the State of Delaware.”

ClearSign Technologies Corp shareholders approved Approval, on an advisory basis, of the Company's compensation paid to named executive officers. at the 2023-06-06 meeting.

“Proposal 3 . Approval, on an advisory basis, of the Company's compensation paid to named executive officers. For Against Abstentions Broker Non-Votes 16,102,465 3,213,536 315,597 8,249,270 The shareholders approved, on an advisory basis, the compensation paid to the Company's named executive officers.”

ClearSign Technologies Corp shareholders approved Ratification of BPM CPA LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023. at the 2023-06-06 meeting.

“Proposal 2 . Ratification of BPM CPA LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023. For Against Abstentions 27,094,154 634,485 152,229 There were no broker non-votes on this proposal. The shareholders ratified the appointment of BPM CPA LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023.”

ClearSign Technologies Corp shareholders approved Election of Directors at the 2023-06-06 meeting.

“Nominee Name For Withheld Broker Non-Votes Robert T. Hoffman 19,591,456 40,142 8,249,270 Gary J. DiElsi 18,741,444 890,154 8,249,270 Colin James Deller 19,595,459 36,139 8,249,270 Catharine M. de Lacy 17,256,644 2,374,954 8,249,270 Judith S. Schrecker 16,616,551 3,015,047 8,249,270 Each of the five nominees for director was elected to serve as a director until the election and qualification of his or her successor or until his or her earlier death, resignation, or removal.”

ClearSign Technologies Corp reported the first quarter ended March 31, 2023 results: revenue $900 thousand.

“The Company recognized approximately $900 thousand in revenue during the three months ended March 31, 2023, as compared to zero revenue for the same period of 2022.”

ClearSign Technologies Corp received a nasdaq extension granted notice regarding minimum bid price (rules 5550(a)(2)).

“May 2, 2023, the Company received a second letter from Nasdaq granting the Company an additional 180 calendar days, or until October 30, 2023, to regain compliance with the Minimum Bid Price Requirement for continued listing on The Nasdaq Capital Market pursuant to Nasdaq Listing Rule 5550(a)(2) (the “Notice”). Nasdaq further stated in the Notice that its determination to grant an extension was based on the Company meeting the continued listing requirement for market value of publicly held shares and all other applicable requirements for initial listing on The Nasdaq Capital Market, with the e”

ClearSign Technologies Corp reported financial results for the full year ended December 31, 2022.

“ClearSign Technologies Corporation Provides Full Year 2022 Update”

Judith Schrecker was appointed as Lead Independent Director at ClearSign Technologies Corp.

“On February 18, 2023, the Board, upon Ms. Meline’s resignation, appointed Judith Schrecker to be the Board’s new Lead Independent Director.”

Catharine de Lacy was appointed as Director at ClearSign Technologies Corp.

“the Board, upon recommendation of the Nominating Committee, appointed Catharine de Lacy as a new director to fill the vacancy created by Ms. Meline’s resignation, effective as of the Effective Date.”

Susanne Meline resigned as Lead Independent Director at ClearSign Technologies Corp.

“On February 18, 2023, Susanne Meline notified the Board of Directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) that she will resign from the Board, effective immediately prior to the appointment of Catharine de Lacy as a member of the Board, which occurred on February 21, 2023 (the “Effective Date”), as more fully described below.”

ClearSign Technologies Corp received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2), 5810(c)(3)(A)).

“November 1, 2022, ClearSign Technologies Corporation (the “Company”) received a letter (the “Notice”) from the Listing Qualifications Staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that, based upon the closing bid price of the Company’s common stock for the last 30 consecutive business days beginning on September 20, 2022 and ending on October 31, 2022, the Company no longer meets the requirement to maintain a minimum bid price of $1 per share, as set forth in Nasdaq Listing Rule 5550(a)(2). In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has been pr”

Gary DiElsi was appointed as director at ClearSign Technologies Corp.

“In connection with Mr. Pate’s resignation, the Board, upon recommendation of the Nominating Committee, appointed Gary DiElsi as a new director to fill the vacancy created by Mr. Pate’s resignation.”

Bruce A. Pate resigned as director at ClearSign Technologies Corp.

“On July 28, 2022, Bruce A. Pate notified the Board of Directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) that he will resign effective August 1, 2022 (the “Effective Date”).”

Colin James Deller resigned as Interim Chief Financial Officer at ClearSign Technologies Corp.

“Colin James Deller resigned from his position as the Company’s Interim Chief Financial Officer (and principal financial and accounting officer) and Interim Treasurer as of the Effective Date.”

Brent Hinds was appointed as Vice President and Controller at ClearSign Technologies Corp.

“Effective as of October 18, 2021 (the “Effective Date”), Brent Hinds was appointed as Vice President and Controller of ClearSign Technologies Corporation (the “Company”).”

Colin James Deller was appointed as Interim Chief Financial Officer at ClearSign Technologies Corp.

“On July 29, 2021, the board of directors of the Company appointed Colin James Deller, 53, the Company’s Chief Executive Officer and a director, as the Interim Chief Financial Officer (and principal financial and accounting officer), Interim Treasurer, and Interim Secretary of the Company while it pursues the process of retaining a permanent candidate(s) to fill the positions.”

Brian G. Fike departed as Chief Financial Officer, Treasurer, and Secretary at ClearSign Technologies Corp.

“On July 30, 2021, ClearSign Technologies Corporation (the “Company,” “we,” “us” or “our”) announced that Brian G. Fike, the Company’s Chief Financial Officer, Treasurer, and Secretary, dear friend and colleague, passed away.”