Highest-materiality recent filing
ClearSign Technologies recommences ATM offering for up to $6.875M in common stock
On July 6, 2026, ClearSign filed a prospectus supplement to recommence its ATM offering under the Sales Agreement with H.C. Wainwright.
ClearSign closes full over-allotment of 116,667 shares for ~$471K net proceeds
Underwriter Newbridge Securities purchased 116,667 additional shares at $4.33 each, fully exercising the over-allotment option.
All four director nominees elected: Basenese, Deller, DiGiandomenico, Silva (each with >74% of votes cast excluding broker non-votes).
777,780 shares priced at $4.33/share; gross proceeds $3.37M (up to $3.87M with 30-day over-allotment option).
On May 26, 2026, ClearSign notified H.C. Wainwright of suspension and termination of the ATM prospectus supplement filed July 17, 2025.
ClearSign Q1 cash $7.7M; operational progress with multiple burner orders and DOE testing
Cash and cash equivalents $7.7M as of March 31, 2026; shares outstanding 5,409,133 after 1-for-10 reverse split.
ClearSign Q4 revenue $3.7M record; FY revenue $5.2M +44% YoY
Q4 2025 revenue $3.7M (record); FY revenue $5.2M, up 44% YoY.
ClearSign regains Nasdaq minimum bid price compliance; matter closed
Received Nasdaq letter on March 30, 2026 confirming compliance with Listing Rule 5550(a)(2).
ClearSign Technologies announces 1-for-10 reverse stock split effective March 16, 2026
Reverse stock split ratio 1-for-10, effective 12:01 a.m. ET on March 16, 2026.
Reverse stock split approved at ratio between 1-for-2 and 1-for-10, with board discretion to abandon.
ClearSign Technologies holds corporate update call; no specific financial results disclosed
Company held a conference call on Feb 24, 2026, to discuss preliminary unaudited Q4/FY2025 results and corporate updates.
ClearSign preliminary Q4 revenue ~$3.6M (+510% YoY), FY revenue ~$5.2M (+44% YoY)
Preliminary Q4 2025 revenue of approx $3.6M, up 510% from $590K in Q4 2024.
ClearSign Technologies posts new investor presentation on website for upcoming meetings
Investor presentation posted to Company website on December 8, 2025.
ClearSign reports Q3 2025 update: cash $10.5M, multiple new burner orders
Cash and equivalents of $10.5M as of Sep 30, 2025; 52.5M shares outstanding.
ClearSign adopts majority voting for director elections and tightens stockholder proposal rules
Board amended bylaws to require majority of votes cast for director elections, except plurality when nominees exceed seats.
ClearSign receives Nasdaq extension to March 2026 to regain $1 bid price compliance
Received 180-day extension from Nasdaq; compliance deadline now March 30, 2026.
ClearSign regains Nasdaq board independence compliance after director determination
Board determined Anthony DiGiandomenico independent; appointed him to Audit Committee on Aug 26, 2025.
ClearSign Q2 update: cash $12.3M; new orders and product launches; no revenue disclosed
Cash balance $12.3M at June 30; 52.4M shares outstanding.
ClearSign receives Nasdaq non-compliance notice over board independence; two directors resign
On August 8, 2025, Nasdaq notified ClearSign it fails board independence and audit committee composition requirements due to resignations of directors de Lacy and Schrecker.
ClearSign annual meeting: three directors re-elected with large withhold votes; board reduced to six
Six directors re-elected; Catharine de Lacy, Judith Schrecker, G. Todd Silva each had >14M withheld votes.
ClearSign enters $10.39M ATM equity facility with H.C. Wainwright; terminates prior $8.7M ATM
Entered ATM Agreement with H.C. Wainwright & Co. for up to $10,390,000 of common stock, dated July 17, 2025.
ClearSign Technologies announces Board committee changes effective June 27, 2025
Catharine de Lacy resigned from Audit Committee; G. Todd Silva and Louis Basenese appointed.
Board expanded from 5 to 7; appointed Louis Basenese and Anthony DiGiandomenico effective May 22, 2025.
ClearSign provides Q1 update: cash $12.8M, co-branded burners with Zeeco, M Series sales
Cash and equivalents $12.8M at March 31, 2025; 52.4M shares outstanding.
ClearSign receives Nasdaq bid price deficiency notice; reports record FY2024 revenue of $3.6M
Nasdaq notified CLIR on April 1 that bid price below $1 for 30 consecutive business days; 180-day cure period until Sep 29, 2025.
ClearSign regains Nasdaq minimum bid price compliance; continues listing
Received Nasdaq notice on Dec 6, 2024 confirming regained compliance with Listing Rule 5550(a)(2).
ClearSign Q3 revenue record $1.85M, up from $85K YoY
Record quarterly revenue of $1.85M in Q3 2024 vs $85K in Q3 2023, driven by 20 process burner shipment to California refinery.
ClearSign receives Nasdaq extension to April 28, 2025 to regain minimum bid price compliance
Granted 180-day extension after stock closed below $1 for 30 consecutive days through May 1, 2024.
ClearSign suspends China operations; expects $400k-$500k in exit costs
Board approved Aug 22; employees notified Oct 1, 2024.
ClearSign Tech sets annual Say-on-Pay votes after shareholder advisory vote
Stockholders voted in favor of annual Say-on-Pay votes at June 25, 2024 annual meeting.
ClearSign Q2 update: $16M cash, largest burner order, 26-burner project, board changes
Received initial engineering order for 26 ClearSign Core burners for four heaters at a Texas Gulf Coast petrochemical facility (Fortune 500 client, partner Birwelco USA).
ClearSign appoints G. Todd Silva to board of directors effective August 1, 2024
Mr. Silva, nominated by clirSPV LLC, fills vacancy created by Robert T. Hoffman, Sr.'s June 2024 resignation.
ClearSign corrects vote counts for directors Maley and Schrecker in 8-K/A
Amendment solely fixes typographical error in June 26, 2024 filing; original outcome unchanged.
ClearSign raises $4.3M in private placement; shareholders approve authorized share increase to 87.5M
Issued 3.35M shares, pre-funded warrants for 1.343M shares, and private warrants for 7.04M shares at $1.05 strike to clirSPV LLC for $4.3M gross.
ClearSign board member resigns; clirSPV exercises full participation right for ~$4.3M
Board member Robert T. Hoffman Sr. resigned effective June 16, 2024; successor designee being vetted.
ClearSign Technologies vacates Chairman position effective June 3, 2024
Board vacated Chairman role on recommendation of Nominating and Corporate Governance Committee.
ClearSign Q1 revenue up 22% YoY to $1.1M; closes $8.7M equity offering
Revenue $1.1M vs $900k in Q1 2023, up 22% YoY.
ClearSign underwriter exercises over-allotment in full for ~$638K gross proceeds
Over-allotment exercised: 693,114 shares of common stock and warrants to purchase up to 693,114 shares at $0.92 per set.
ClearSign gets Nasdaq bid price deficiency notice; Maley appointed to committees
Received Nasdaq notice on May 2, 2024 for closing bid price below $1 for 30 consecutive business days.
ClearSign reports record 2023 revenue of $2.4M, up 542% YoY; raises $9.3M
Full year 2023 revenue $2.4M vs $374K in 2022; Q4 2023 revenue $1.2M vs $50K in Q4 2022.
ClearSign adds director David Maley, closes $9.3M combined public/private offering
David Maley appointed to ClearSign Board, effective April 24, 2024; serves on Audit & Risk Committee.
ClearSign Technologies raises $5M in private placement with amended securities purchase agreement
Entered amendment to securities purchase agreement with investor Andrew Schwartzberg on April 22, 2024.
Public offering of 4,620,760 shares + 4,620,760 warrants at $0.91/share and $0.01/warrant.
ClearSign reports Q4 revenue ~$1.2M, up from $50K YoY; FY revenue $2.3M, loss narrows
Q4 2023 revenue approximately $1.2 million, compared to $50 thousand in Q4 2022.
ClearSign extends purchase right for clirSPV to Dec 31, 2024
clirSPV LLC's Purchase Right to participate in future equity offerings extended to Dec. 31, 2024.
ClearSign receives Nasdaq noncompliance notice over board independence after director resignation
ClearSign received Nasdaq notice on Nov 24, 2023, for noncompliance with board independence rules (Rules 5605(b)(1) and 5605(c)(2)(A)).
ClearSign Q3 revenue $85k; first commercial boiler burner startup; hydrogen grants
Revenue approx $85k in Q3 2023 vs zero year-ago; cash & short-term investments $7.2M as of Sep 30.
ClearSign receives $500K SoCalGas commitment plus $1.65M DOE grant for hydrogen burner
SoCalGas pledges $500,000 to promote field demonstration of ClearSign Core burner technology in Southern California.
ClearSign Q2 revenue $150k vs $0 YoY; awarded $1.65M DOE hydrogen burner grant
Q2 2023 revenue ~$150k, up from zero in Q2 2022; cash and short-term investments ~$8.5M.
ClearSign awarded $1.65M DOE Phase 2 grant for hydrogen burner development
Phase 2 grant of up to $1.65M over two years from DOE SBIR program.
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
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
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.
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.
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.
On February 18, 2023, the Board, upon Ms. Meline’s resignation, appointed Judith Schrecker to be the Board’s new Lead Independent Director.
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.
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.
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.
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 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.
Effective as of October 18, 2021 (the “Effective Date”), Brent Hinds was appointed as Vice President and Controller of ClearSign Technologies Corporation (the “Company”).
Max materiality 0.80 · Median 0.60 · Most common event other_material