Jefferson Gramm - Jun 23, 2021 Form 4 Insider Report for Rubicon Technology, Inc. (RBCN)

Role: Director, 10%+ Owner
Signature: /s/ Timothy Brog, Attorney in Fact
Stock symbol: RBCN
Transactions as of: Jun 23, 2021
Transactions value $: $9,999
Form type: 4
Date filed: 6/28/2021, 09:21 PM
Next filing: Jan 28, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RBCN	Common Stock	Award	$0	+1.25K	+39.14%	$0.00	4.44K	Jun 23, 2021	Direct
holding	RBCN	Common Stock						258K	Jun 23, 2021	See footnote	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RBCN	Restricted Stock Units	Award	$10K	+1.01K		$9.90^*	1.01K	Jun 24, 2021	Common Stock	1.01K		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents a right to receive one share of the Company's common stock.
F2	RSUs vest on the day immediately preceding the day of the 2022 Annual Meeting of Stockholders.
F3	Consists of securities directly held by Bandera Master Fund L.P. ("Bandera Master Fund"). Bandera Master Fund has delegated to Bandera Partners LLC ("Bandera Partners"), its investment manager, the sole and exclusive authority to vote and dispose of the securities held by Bandera Master Fund. Mr. Gramm, solely by virtue of his position as a Managing Partner, Managing Director and Portfolio Manager of Bandera Partners, may be deemed to beneficially own the securities held by Bandera Master Fund. Mr. Gramm expressly disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.