Live Earnings Conference Call: ClearSign Technologies will host a live Q1 2026 earnings call on May 20, 2026 at 5:00PM ET. Follow this link to get details and listen to ClearSign Technologies' Q1 2026 earnings call when it goes live. Get details. ClearSign Technologies (CLIR) Institutional Ownership $4.64 +0.23 (+5.12%) Closing price 05/19/2026 03:46 PM EasternExtended Trading$4.51 -0.12 (-2.61%) As of 05/19/2026 05:10 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more. Add Compare Share Share Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for ClearSign Technologies (NASDAQ:CLIR)CurrentInstitutional OwnershipPercentage24.03%Number ofInstitutional Buyers(last 12 months)6TotalInstitutional Inflows(last 12 months)$2.63MNumber ofInstitutional Sellers(last 12 months)0 Get CLIR Insider Trade Alerts Want to know when executives and insiders are buying or selling ClearSign Technologies stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. Subscribe Now View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. 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Skip Chart & View Institutional Buying and Selling Data CLIR Institutional Buying and Selling by Quarter ClearSign Technologies Major Shareholders & Ownership History ExportReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails3/17/2026 Rockefeller Capital Management L.P.81,209$45K0.0%+801.4%0.151% 2/12/2026 Renaissance Technologies LLC77,800$43K0.0%+89.6%0.145% 2/6/2026 Americana Partners LLC55,000$31K0.0%+83.3%0.103% 8/13/2025 Beacon Pointe Advisors LLC271,739$145K0.0%N/A0.518% 8/13/2025 Northwestern Mutual Wealth Management Co.71,730$40K0.0%+895.3%0.137% 5/20/2025Integrity Alliance LLC.39,524$30K0.0%N/A0.075% 4/15/2025Simon Quick Advisors LLC603,149$452K0.0%N/A1.151% 2/17/2025Citadel Advisors LLC34,134$49K0.0%N/A0.068% 2/14/2025Northern Trust Corp75,466$109K0.0%+23.8%0.150% 2/13/2025Raymond James Financial Inc.51,832$75K0.0%N/A0.103% 2/13/2025Renaissance Technologies LLC58,500$84K0.0%N/A0.116% 2/12/2025Geode Capital Management LLC536,995$773K0.0%+3.0%1.069% 2/6/2025Raymond James Financial Inc.51,832$75K0.0%N/A0.103% 1/31/2025DDD Partners LLC105,000$151K0.0%-8.7%0.209% 11/16/2024Geode Capital Management LLC521,229$443K0.0%+35.5%1.038% 10/28/2024Americana Partners LLC30,000$25K0.0%N/A0.060% 10/11/2024Creative Planning207,070$176K0.0%-22.2%0.412% 5/10/2024Prevail Innovative Wealth Advisors LLC46,306$45K0.0%N/A0.101% 4/15/2024Disciplined Investments LLC48,016$46K0.0%+223.0%0.123% 7/13/2023Cambridge Investment Research Advisors Inc.443,000$580K0.0%N/A1.149% 8/12/2022Robertson Stephens Wealth Management LLC21,440$25K0.0%N/A0.056% CLIR Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of CLIR shares? During the previous two years, 13 institutional investors and hedge funds held shares of ClearSign Technologies. The most heavily invested institutionals were Geode Capital Management LLC ($773K), Simon Quick Advisors LLC ($452K), Creative Planning ($176K), DDD Partners LLC ($151K), Beacon Pointe Advisors LLC ($145K), Northern Trust Corp ($109K), and Raymond James Financial Inc. ($75K).Learn more on ClearSign Technologies' institutional investors. What percentage of ClearSign Technologies' stock is owned by institutional investors? 24.03% of ClearSign Technologies' stock is owned by institutional investors. Learn more on CLIR's institutional investor holdings. Which institutional investors have been buying ClearSign Technologies' stock? Of the 11 institutional investors that purchased ClearSign Technologies' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Simon Quick Advisors LLC ($603.15K), Beacon Pointe Advisors LLC ($271.74K), Geode Capital Management LLC ($152.41K), Raymond James Financial Inc. ($103.66K), Renaissance Technologies LLC ($95.27K), Rockefeller Capital Management L.P. ($72.20K), and Northwestern Mutual Wealth Management Co. ($64.52K). How much institutional buying is happening at ClearSign Technologies? Institutional investors have bought a total of 470,231 shares in the last 24 months. This purchase volume represents approximately $2.63M in transactions. Related Companies OPXS Institutional Ownership ODYS Institutional Ownership PRPO Institutional Ownership DAIO Institutional Ownership BNGO Institutional Ownership MSAI Institutional Ownership ASTC Institutional Ownership STAI Institutional Ownership TT Institutional Ownership KEYS Institutional Ownership This page (NASDAQ:CLIR) was last updated on 5/20/2026 by MarketBeat.com Staff. From Our PartnersTrump's gold order: the announcement they won't put on the front pageOn August 15, 1971, Nixon interrupted prime-time television and ended the gold standard in 15 minutes - no deb...Reagan Gold Group | SponsoredIran's New Leader Just Said Something That Should Terrify Every AmericanIran's Supreme Leader has declared the Strait of Hormuz closed as leverage against the U.S. - and with 40% of ...American Alternative | SponsoredHey, it's Jon Najarian. The SpaceX IPO is right around the corner. But I discovered Elon may have something BIGGER planned. 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