Insider Trading & Ownership of Darren Seirer

Location: New York, NY
Summary: The estimated net worth of Darren Seirer is at least $682,281 dollars as of 03 Dec 2025. Darren Seirer is the Director, 10%+ Owner of Rubicon Technology, Inc. and owns shares of Rubicon Technology, Inc. (RBCN) stock worth about $682.3K.
Signature: /s/ Darren Seirer
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Ownership of Darren Seirer

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
RBCN	Rubicon Technology, Inc.	Director, 10%+ Owner	$682,281			19 Aug 2022
JANL	JANEL CORP	Chairman, President & CEO, Director, 10%+ Owner				01 Jan 2023