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Filing Details

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
1224360	E Michael Mikolajczyk	C/O Rubicon Technology, Inc. 900 East Green St., Unit A Bensenville IL 60106		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2015-12-30	41,300	$1.20	169,469	No	4	P	Direct
Common Stock	Acquisiton	2015-12-31	38,700	$1.19	208,169	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct
No	4	P	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.16 to $1.24, inclusive. The reporting person undertakes to provide to Rubicon Technology, Inc., any security holder of Rubicon Technology, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1) and (3) to this Form 4.
Includes 3,406 shares of restricted stock that vest on December 31, 2015, which were previously reported by the reporting person on Form 4.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.16 to $1.24, inclusive.