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Filing Details

Accession Number:: 0001213900-13-002082
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-04-29 15:13:54
Reporting Period:: 2013-04-25

Filing Date:: 2013-04-29
Accepted Time:: 2013-04-29 15:13:54
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1410172	Rubicon Technology Inc.	RBCN	Semiconductors & Related Devices (3674)	364419301

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1211700	R Donald Caldwell	C/O Rubicon Technology Inc. 900 East Green St., Unit A Bensenville IL 60106		Yes	No	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-04-25	225,000	$7.45	4,779,742	No	4	S	Indirect	See footnote.
Common Stock	Disposition	2013-04-26	61,891	$7.53	4,717,851	No	4	S	Indirect	See footnote.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote.
No	4	S	Indirect	See footnote.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	22,881	Direct

Footnotes

Includes 4,864 shares of restricted stock pursuant to grants that vest according to the following schedule: 1,621 shares vest on June 30, 2013, 1,621 shares vest on September 30, 2013 and 1,622 shares vest on December 31, 2013.
Under the terms of the applicable partnership agreements of the Funds (as defined below), the Reporting Person is deemed to hold 15,781 of these shares for the benefit of the Funds, which are entitled to receive the net economic benefit of the shares as a credit against the management fees owed by the Funds to Cross Atlantic Capital Partners, Inc. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.
Sales effected pursuant to a Rule 10b5-1 trading plan adopted on February 25, 2013.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.20 to $7.80 inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price set forth within the ranges set forth in this footnote.
Consists of shares held by Cross Atlantic Technology Fund, L.P., Cross Atlantic Technology Fund, II, L.P., and/or The Co-Investment 2000 Fund, L.P. (the "Funds"). The Reporting Person is the owner and director of Cross Atlantic Capital Partners, Inc., which is the general partner of XATF Management, L.P., which is the general partner of Cross Atlantic Technology Fund, L.P. The Reporting Person is a director, shareholder and officer of Cross Atlantic Capital Partners II, Inc., which is the general partner of XATF Management II, L.P., which is the general partner of Cross Atlantic Technology Fund II, L.P. The Reporting Person is a shareholder, director and officer of Co-Invest Capital Partners, Inc., which is the general partner of Co-Invest Management, L.P., which is the general partner of The Co-Investment 2000 Fund, L.P. The Reporting Person disclaims beneficial ownership of the shares held by the Funds except to the extent of his pecuniary interest therein.
Cross Atlantic Technology Fund, L.P. holds 61,891 shares of common stock, Cross Atlantic Technology Fund II, L.P. holds 2,230,198 shares of common stock and The Co-Investment 2000 Fund, L.P. holds 2,487,653 shares of common stock.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.35 to $7.658 inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price set forth within the ranges set forth in this footnote.
Cross Atlantic Technology Fund II, L.P. holds 2,230,198 shares of common stock and The Co-Investment 2000 Fund, L.P. holds 2,487,653 shares of common stock.