FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
1. Name and Address of Reporting Person * Rich Mathew Jason 2. Date of Event Requiring Statement (MM/DD/YYYY)
11/18/2019 

3. Issuer Name and Ticker or Trading Symbol Rubicon Technology, Inc. [RBCN]
(Last)       (First)       (Middle)
C/O RUBICON TECHNOLOGY, INC., 900 EAST GREEN ST., UNIT A
4. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                          _____ 10% Owner
___X___ Officer (give title below)        _____ Other (specify below)
Chief Financial Officer /
(Street)
BENSENVILLE, IL 60106      
(City)             (State)             (Zip)
5. If Amendment, Date Original Filed(MM/DD/YYYY)
 

6. Individual or Joint/Group Filing(Check Applicable Line)_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock  0  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Unit   (1) 11/18/2022  Common Stock  9000   (2) D   

Explanation of Responses:
(1)  One third of such units will vest if prior to November 18, 2022 the 15-trading day average closing price of the Company's common stock is greater than or equal to the target prices of $11.00, $12.50 and $14.00, respectively.
(2)  Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Rich Mathew Jason
C/O RUBICON TECHNOLOGY, INC.
900 EAST GREEN ST., UNIT A
BENSENVILLE, IL 60106


Chief Financial Officer

Signatures
/s/ Mathew Rich 11/18/2018
**Signature of Reporting Person Date
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