Ariel Investments, LLC Rubicon Technology, Inc. Transaction History

Ariel Investments, LLC

16 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2021 Nov 12, 2021	SELL	$8.82 - $10.7 $190,079 - $230,595	-21,551 Closed	0 $0
Q2 2021 Aug 13, 2021	SELL	$9.5 - $11.18 $306,346 - $360,521	-32,247 Reduced 59.94%	21,551 $205,000
Q1 2021 May 14, 2021	SELL	$9.22 - $11.45 $37,691 - $46,807	-4,088 Reduced 7.06%	53,798 $555,000
Q4 2020 Feb 12, 2021	BUY	$8.4 - $9.56 $6,711 - $7,638	799 Added 1.4%	57,886 $524,000
Q2 2020 Aug 14, 2020	SELL	$7.25 - $8.33 $68,737 - $78,976	-9,481 Reduced 14.24%	57,087 $464,000

Q1 2020 May 14, 2020	SELL	$7.71 - $9.16 $88,742 - $105,431	-11,510 Reduced 14.74%	66,568 $514,000
Q4 2019 Feb 14, 2020	SELL	$8.0 - $9.23 $239,496 - $276,318	-29,937 Reduced 27.72%	78,078 $650,000
Q3 2019 Nov 14, 2019	SELL	$8.3 - $9.58 $309,598 - $357,343	-37,301 Reduced 25.67%	108,015 $1.03 Million
Q1 2019 May 15, 2019	BUY	$7.81 - $8.41 $5,318 - $5,727	681 Added 0.47%	145,316 $1.17 Million
Q4 2018 Feb 14, 2019	SELL	$7.37 - $9.09 $590,631 - $728,472	-80,140 Reduced 35.65%	144,635 $1.14 Million
Q3 2018 Nov 14, 2018	BUY	$7.79 - $9.25 $75,500 - $89,651	9,692 Added 4.51%	224,775 $2.02 Million
Q2 2018 Aug 10, 2018	BUY	$6.77 - $8.06 $398,996 - $475,024	58,936 Added 37.74%	215,083 $1.7 Million
Q1 2018 May 14, 2018	SELL	$6.95 - $8.37 $185,426 - $223,311	-26,680 Reduced 14.59%	156,147 $1.09 Million
Q4 2017 Feb 14, 2018	BUY	$7.6 - $8.7 $36,746 - $42,064	4,835 Added 2.72%	182,827 $1.46 Million
Q3 2017 Nov 14, 2017	SELL	$7.86 - $8.4 $18,117 - $19,362	-2,305 Reduced 1.28%	177,992 $1.47 Million
Q2 2017 Aug 14, 2017	BUY	N/A	180,297	180,297 $1.67 Million

150

Ticker RBCN
Exchange NASDAQ
Sector Technology
Industry Semiconductor Equipment & Materials
Shares Outstandng 2,462,890
Market Cap $1.8M
Description
Rubicon Technology, Inc. provides monocrystalline sapphire for applications in optical and industrial systems in North America and Asia. The company offers optical and industrial sapphire products in various shapes and sizes, including round and rectangular windows and wafers, domes, tubes, and rods for a range of end markets comprising defense ...

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