Insider · CIK 0001224360

Michael E Mikolajczyk

Files at: RBCN. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $96k · 1sales $0 · 0net $96k

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Dec 3, 2018 AForm 4 →	Dec 4, 5:34 pm EST	Rubicon Technology, Inc.RBCN	20,215	$8.71	$176,027	71,275	—	plan?
Nov 29, 2018 AForm 4 →	Nov 30, 5:01 pm EST	Rubicon Technology, Inc.RBCN	9,687	$8.68	$84,037	51,060	—	plan?
Nov 27, 2018 AForm 4 →	Nov 28, 5:17 pm EST	Rubicon Technology, Inc.RBCN	5,098	$8.31	$42,352	41,373	—	plan?
Mar 16, 2018 AForm 4 →	Mar 19, 5:41 pm EDT	Rubicon Technology, Inc.RBCN	626	—	—	36,275	—	plan?
Jan 2, 2018 AForm 4 →	Jan 4, 4:06 pm EST	Rubicon Technology, Inc.RBCN	1,269	—	—	35,649	—	plan?
Sep 30, 2017 AForm 4 →	Oct 3, 5:41 pm EDT	Rubicon Technology, Inc.RBCN	1,247	—	—	34,380	—	plan?
Jun 30, 2017 AForm 4 →	Jul 5, 7:16 pm EDT	Rubicon Technology, Inc.RBCN	1,101	—	—	33,133	—	plan?
Mar 31, 2017 AForm 4 →	Apr 4, 6:00 pm EDT	Rubicon Technology, Inc.RBCN	11,720	—	—	320,327	—	plan?
Oct 1, 2016 DForm 4 →	Oct 4, 4:30 pm EDT	Rubicon Technology, Inc.RBCN	8,772	—	—	308,607	—	plan?
Jan 1, 2016 AForm 4 →	Jan 5, 5:39 pm EST	Rubicon Technology, Inc.RBCN	109,210	—	—	317,379	—	plan?
Dec 30, 2015 PForm 4 →	Jan 4, 2016, 4:09 pm EST	Rubicon Technology, Inc.RBCN	80,000	$1.20	$95,613	208,169	+62.4%	plan?
Jan 1, 2015 AForm 4 →	Jan 5, 2:40 pm EST	Rubicon Technology, Inc.RBCN	13,621	—	—	128,169	—	plan?

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
May 10, 2018 AForm 4 →	May 14, 1:09 pm EDT	Rubicon Technology, Inc.RBCN	1,391	$7.19	$10,001	1,391	—