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Logo: Rubicon Technology, Public domain, via Wikimedia Commons5
American crystal technology company
Rubicon Technology, Inc. is an American company specializing in sapphire crystal growth and large-diameter sapphire technology.3 From Wikipedia, CC BY-SA 4.0
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Last updated Oct 19, 2026.
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Rubicon Technology, Inc. is an American company specializing in sapphire crystal growth and large-diameter sapphire technology. Their improvement to the Kyropoulos technology is known as "ES2", and was developed in their Illinois-based crystal growth facilities. Rubicon Technology has been producing the industry's first 12-inch sapphire wafer since 2010, and has shipped millions of wafers and core products in sizes from 2" to 12" since 2001. The company's products have been used in the LED industry and for the production of silicon on sapphire wafers for integrated circuits (RFICs), as well as on high-quality optical and industrial applications for high-performance sapphire.3
From the company’s reports to the SEC. Every number links to the filing it came from.
Out of $3.6M in revenue.8
| Fiscal year | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|---|
| Revenue | $19.6M9 | $5.0M10 | $3.9M11 | $3.5M12 | $3.6M13 | $4.1M8 | $3.6M8 |
| Cost of revenue | $7.5M9 | $10.6M10 | $3.9M10 | $2.4M12 | $2.6M13 | $2.8M8 | $2.1M8 |
| Gross profit | -$26.0M9 | -$5.5M10 | $16.0K11 | $1.1M12 | $1.0M13 | $1.3M8 | $1.4M8 |
| Research and development | $2.5M9 | $962.0K10 | $122.0K11 | $662.0K13 | $662.0K8 | ||
| Operating income | -$62.7M9 | -$17.9M10 | $635.0K11 | -$1.2M12 | $530.0K12 | -$464.0K8 | $585.0K8 |
| Interest | $99.0K9 | $39.0K8 | |||||
| Income before tax | -$459.0K8 | $919.0K8 | |||||
| Income tax | -$223.0K9 | $88.0K10 | $24.0K11 | $22.0K12 | $13.0K13 | ||
| Net income | -$62.9M9 | -$17.9M10 | $963.0K11 | -$1.1M12 | -$1.1M13 | -$730.0K8 | $935.0K8 |
| Earnings per share | -$23.869 | -$6.6010 | $0.3511 | -$0.4212 | -$0.4312 | ||
| Earnings per share (diluted) | -$23.869 | -$6.6010 | $0.3511 | -$0.4212 | -$0.4312 | ||
| Shares (weighted, basic) | 2.4M shares8 | 2.4M shares8 | |||||
| Shares (weighted, diluted) | 2.4M shares8 | 2.5M shares8 |
| Fiscal year | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|---|
| Cash | $17.7M9 | $11.5M10 | $11.2M11 | $8.7M12 | $11.1M13 | $11.3M8 | $1.6M8 |
| Receivables | $719.0K8 | $671.0K8 | |||||
| Inventory | $658.0K8 | $325.0K8 | |||||
| Current assets | $45.7M9 | $34.2M10 | $33.1M11 | $31.7M12 | $28.3M13 | $28.2M8 | $2.9M8 |
| Property, plant and equipment | $2.3M8 | $2.2M8 | |||||
| Total assets | $53.0M9 | $35.0M10 | $35.8M11 | $34.8M12 | $31.2M13 | $31.0M8 | $6.0M8 |
| Accounts payable | $545.0K8 | $438.0K8 | |||||
| Short-term debt | $013 | $25.0K8 | |||||
| Current liabilities | $2.6M9 | $1.7M10 | $1.2M11 | $1.6M12 | $1.3M12 | $1.6M8 | $1.2M8 |
| Long-term debt | $1.6M8 | ||||||
| Total liabilities | $2.6M16 | $1.3M13 | $1.6M8 | $2.8M8 | |||
| Retained earnings | -$332.1M8 | -$331.2M8 | |||||
| Shareholders’ equity | $50.4M10 | $33.3M11 | $34.6M12 | $33.2M13 | $29.9M8 | $29.4M8 | $3.2M8 |
| Shares outstanding | 2.7M shares9 | 2.7M shares10 | 2.7M shares11 | 2.7M shares12 | 2.4M shares13 | 2.4M shares8 | 2.5M shares8 |
Cash flow is reported year to date, not quarter by quarter, so there are no separate quarterly figures.
| Fiscal year | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|---|
| Cash from operations | -$15.3M9 | -$2.0M10 | -$1.1M11 | -$1.2M12 | $297.0K12 | ||
| Depreciation and amortization | $140.0K8 | $120.0K8 | |||||
| Stock-based compensation | $371.0K8 | $182.0K8 | |||||
| Capital spending | $704.0K9 | $2.3M11 | $64.0K12 | $2.0K13 | |||
| Free cash flow | -$16.0M | -$3.3M | -$1.3M | $295.0K | |||
| Cash from investing | $640.0K8 | $16.7M8 | |||||
| Share buybacks | $65.0K11 | $536.0K12 | $2.4M13 | ||||
| Cash from financing | -$187.0K8 | -$25.8M8 |
In 2000, Rubicon Technology began its commercial production and was incorporated in 2001. The company successfully grew a 30 kg sapphire boule in 2002. In 2003, its polishing capacity was added, and it received ISO 9001 certification in the following year. In 2013, Rubicon launched 4" and 6" Patterned Sapphire Substrates, extending vertical integration "from powder to pattern".
From Wikipedia’s article on Rubicon Technology, shared under CC BY-SA 4.0.7
Who has led Rubicon Technology, and when. Pick a name to see everywhere that person has worked.
Rubicon Technology is engaged in developing, manufacturing and selling monocrystalline sapphire and other crystalline products for light-emitting diodes, radio-frequency integrated circuits, optoelectronics, and other optical applications.
Rubicon Technology produces Patterned Sapphire Substrates in 4" through 8" diameters. The company also produces sapphire ingots, which are used as raw material for further fabrication. Additionally, Rubicon produces optical windows, with applications ranging from defense/aerospace and instrumentation to medical devices and polished epi-ready substrates.
From Wikipedia’s article on Rubicon Technology, shared under CC BY-SA 4.0.7
54 filings to the SEC since October 2021: 3 annual reports, 4 quarterly reports, 13 major events, 14 insider forms, 6 large holders, 14 other. The latest 20:
The 54 filings since October 2021 can be filtered by form type and year here when JavaScript is on.
Every filing from the last five years, summarized. The full record is on SEC EDGAR.
5 open-market trades by officers, directors and large owners since October 2021: 0 buys and 5 sales. Grants, option exercises and gifts are left out.
| Date | Who | Trade | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|
| Feb 22, 2023 | Brog TimothyDirector | Sale | 52,624 | $1.51 | $79.5K | Form 4 |
| Aug 19, 2022 | Brog TimothyDirector | Sale | 58,315 | $20.00 | $1.2M | Form 4 |
| Aug 19, 2022 | MIKOLAJCZYK MICHAEL EDirector | Sale | 31,851 | $20.00 | $637.0K | Form 4 |
| Aug 19, 2022 | Westphal SusanDirector | Sale | 4,472 | $20.00 | $89.4K | Form 4 |
| Aug 19, 2022 | Bandera Partners LLC | Sale | 132,992 | $20.00 | $2.7M | Form 4 |
From Forms 4 filed with the SEC.
Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.
The numbers on this page point here. Each one links to the record it came from.
