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Zacks Company Profile for Rubicon Technology, Inc. (RBCN : OTC)

• Company Description    Rubicon Technology, Inc. is a vertically integrated advanced electronic materials provider specializing in monocrystalline sapphire for applications in light-emitting diodes, optical systems and specialty electronic devices. Rubicon has a proprietary technology platform and expertise extending from the preparation of raw aluminum oxide through sapphire crystal growth and fabrication to large-diameter polished sapphire wafers and patterned sapphire substrates, enabling Rubicon to supply custom sapphire products with superior quality and precision. Rubicon is ISO 9001 certified and ITAR registered. Number of Employees: 272

• Price / Volume Information    Yesterday's Closing Price: $5.32 Daily Weekly Monthly 20 Day Moving Average: 763 shares Shares Outstanding: 9.38 (millions) Market Capitalization: $49.89 (millions) Beta: 1.39 52 Week High: $5.84 52 Week Low: $2.55 Short Interest Ratio:   % Price Change % Price Change Relative to S&P 500 4 Week -7.80% -8.48% 12 Week 43.78% 39.85% Year To Date 93.46% 78.76%

• Address & Contact Information Street Address Phone / Fax Email Address Web URL 900 East Green Street - Bensenville,IL 60106 USA ph: 847-295-7000 fax: 847-295-7555 info@rubicontechnology.com http://www.rubicontechnology.com

• General Corporate Information    Officers Stephen Baranowski - President and Chief Financial Officer Nathan Shandy - Vice President; Treasurer & Secretary Charles Jacobson - Director Darren Seirer - Director Dennis Paul - Director Peer Information Rubicon Technology, Inc. (CPCL.) Rubicon Technology, Inc. (HIFN) Rubicon Technology, Inc. (SEM.1) Rubicon Technology, Inc. (DION) Rubicon Technology, Inc. (AMKR) Rubicon Technology, Inc. (CNXT.) Industry / Sector / Ticker Info Analyst Coverage: No Industry Group: ELEC COMP-SEMIC Sector: Computer and Technology CUSIP: 78112T206 SIC: 3674 Fiscal Year Fiscal Year End: December Last Reported Quarter: 03/01/26 Next Expected EPS Date: 08/13/26 Share - Related Items Shares Outstanding: 9.38 Most Recent Split Date: 5.00 (0.10:1) Beta: 1.39 Market Capitalization: $49.89 (millions)

• EPS Information     • Dividend Information Analyst Coverage: No Dividend Yield: 0.00% Current Fiscal Quarter EPS Consensus Estimate: $ Indicated Annual Dividend: $0.00 Current Fiscal Year EPS Consensus Estimate: $ Payout Ratio: Number of Estimates in the Fiscal Year Consensus: Change In Payout Ratio: Estmated Long-Term EPS Growth Rate: % Last Dividend Paid: NA - $0.00 Next EPS Report Date: 08/13/26

• Fundamental Ratios P/E Current FY Estimate: - Trailing 12 Months: - PEG Ratio: - Price Ratios Price/Book: - Price/Cash Flow: 26.67 Price / Sales: 0.53 EPS Growth vs. Year Ago Period: 633.33% vs. Previous Quarter: -% Sales Growth vs. Year Ago Period: 23,619.72% vs. Previous Quarter: 22.71% ROE 06/30/26 - - 03/31/26 - -56.47 12/31/25 - -39.37 ROA 06/30/26 - - 03/31/26 - 10.04 12/31/25 - 6.77 Current Ratio 06/30/26 - - 03/31/26 - 0.65 12/31/25 - 0.70 Quick Ratio 06/30/26 - - 03/31/26 - 0.65 12/31/25 - 0.70 Operating Margin 06/30/26 - - 03/31/26 - 5.29 12/31/25 - 4.38 Net Margin 06/30/26 - - 03/31/26 - 5.29 12/31/25 - 4.38 Pre-Tax Margin 06/30/26 - - 03/31/26 - 5.57 12/31/25 - 4.61 Book Value 06/30/26 - - 03/31/26 - -1.71 12/31/25 - -2.03 Inventory Turnover 06/30/26 - - 03/31/26 - 1,551.10 12/31/25 - 664.20 Debt-to-Equity 06/30/26 - - 03/31/26 - - 12/31/25 - - Debt-to-Capital 06/30/26 - - 03/31/26 - - 12/31/25 - -

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