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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: 3

• Price / Volume Information    Yesterday's Closing Price: $2.15 Daily Weekly Monthly 20 Day Moving Average: 730 shares Shares Outstanding: 2.38 (millions) Market Capitalization: $5.11 (millions) Beta: 0.90 52 Week High: $2.49 52 Week Low: $0.62 Short Interest Ratio:   % Price Change % Price Change Relative to S&P 500 4 Week 7.50% 1.87% 12 Week -1.83% 6.06% Year To Date 30.30% 35.41%

• 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 lreynolds@rubicontechnology.com http://www.rubicontechnology.com

• General Corporate Information    Officers Darren Seirer - Chairman and Chief Executive Officer Joseph Ferrara - Executive Officer and Chief Financial Officer Lindsey Reynolds - Executive Officer and Director of Accounting Michael E. Mikolajczyk - 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: 06/01/24 Next Expected EPS Date: 05/21/25 Share - Related Items Shares Outstanding: 2.38 Most Recent Split Date: 5.00 (0.10:1) Beta: 0.90 Market Capitalization: $5.11 (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: 05/21/25

• Fundamental Ratios P/E Current FY Estimate: - Trailing 12 Months: 11.32 PEG Ratio: - Price Ratios Price/Book: 13.93 Price/Cash Flow: - Price / Sales: 3.28 EPS Growth vs. Year Ago Period: 200.00% vs. Previous Quarter: 300.00% Sales Growth vs. Year Ago Period: -40.47% vs. Previous Quarter: -2.32% ROE 03/31/25 - - 12/31/24 - -9.20 09/30/24 - -122.29 ROA 03/31/25 - - 12/31/24 - -3.61 09/30/24 - -47.56 Current Ratio 03/31/25 - - 12/31/24 - 1.40 09/30/24 - 1.51 Quick Ratio 03/31/25 - - 12/31/24 - 1.33 09/30/24 - 1.38 Operating Margin 03/31/25 - - 12/31/24 - -2.44 09/30/24 - -29.90 Net Margin 03/31/25 - - 12/31/24 - -2.44 09/30/24 - -29.90 Pre-Tax Margin 03/31/25 - - 12/31/24 - -2.44 09/30/24 - -29.84 Book Value 03/31/25 - - 12/31/24 - 0.15 09/30/24 - 0.18 Inventory Turnover 03/31/25 - - 12/31/24 - 12.39 09/30/24 - 18.92 Debt-to-Equity 03/31/25 - - 12/31/24 - 0.00 09/30/24 - 0.00 Debt-to-Capital 03/31/25 - - 12/31/24 - 0.00 09/30/24 - 0.00

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