13D Filing: Aldebaran Capital, LLC and Rubicon Technology Inc. (RBCN)

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

RULE 13d-2(a)

(Amendment No.   )*

Rubicon Technology, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

78112T206

(CUSIP Number)

Kenneth R. Skarbeck

Aldebaran Capital, L.L.C.

10293 N. Meridian St., Ste. 100

Indianapolis, IN  46290

(317) 818-7827

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

June 21, 2017

(Date of Event which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the

following box [ ].

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act

but shall be subject to all other provisions of the Act (however, see the Notes).