• Live Feeds
    • Press Releases
    • Insider Trading
    • FDA Approvals
    • Analyst Ratings
    • Insider Trading
    • SEC filings
    • Market insights
  • Analyst Ratings
  • Alerts
  • Subscriptions
  • Settings
  • RSS Feeds
Quantisnow Logo
  • Live Feeds
    • Press Releases
    • Insider Trading
    • FDA Approvals
    • Analyst Ratings
    • Insider Trading
    • SEC filings
    • Market insights
  • Analyst Ratings
  • Alerts
  • Subscriptions
  • Settings
  • RSS Feeds
PublishGo to App
    Quantisnow Logo

    © 2025 quantisnow.com
    Democratizing insights since 2022

    Services
    Live news feedsRSS FeedsAlertsPublish with Us
    Company
    AboutQuantisnow PlusContactJobsAI superconnector for talent & startupsNEWLLM Arena
    Legal
    Terms of usePrivacy policyCookie policy

    SEC Form 4: Mikolajczyk Michael E was granted 1,010 shares, increasing direct ownership by 2% to 63,307 units

    8/1/22 4:30:28 PM ET
    $RBCN
    Semiconductors
    Technology
    Get the next $RBCN alert in real time by email
    SEC FORM 4 SEC Form 4
    FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549

    STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

    Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
    or Section 30(h) of the Investment Company Act of 1940
    OMB APPROVAL
    OMB Number: 3235-0287
    Estimated average burden
    hours per response: 0.5
      
    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
    1. Name and Address of Reporting Person*
    MIKOLAJCZYK MICHAEL E

    (Last) (First) (Middle)
    C/O RUBICON TECHNOLOGY, INC.,
    900 EAST GREEN ST., UNIT A

    (Street)
    BENSENVILLE IL 60106

    (City) (State) (Zip)
    2. Issuer Name and Ticker or Trading Symbol
    Rubicon Technology, Inc. [ RBCN ]
    5. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    X Director 10% Owner
    Officer (give title below) Other (specify below)
    3. Date of Earliest Transaction (Month/Day/Year)
    07/29/2022
    4. If Amendment, Date of Original Filed (Month/Day/Year)
    6. Individual or Joint/Group Filing (Check Applicable Line)
    X Form filed by One Reporting Person
    Form filed by More than One Reporting Person
    Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
    1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V Amount (A) or (D) Price
    Common Stock 07/29/2022 A 1,010 A $0 63,307 D
    Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
    (e.g., puts, calls, warrants, options, convertible securities)
    1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
    Explanation of Responses:
    /s/ Timothy Brog Attorney in Fact 08/01/2022
    ** Signature of Reporting Person Date
    Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
    * If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
    ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
    Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
    Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
    Get the next $RBCN alert in real time by email

    Crush Q1 2026 with the Best AI Superconnector

    Stay ahead of the competition with Standout.work - your AI-powered talent-to-startup matching platform.

    AI-Powered Inbox
    Context-aware email replies
    Strategic Decision Support
    Get Started with Standout.work

    Recent Analyst Ratings for
    $RBCN

    DatePrice TargetRatingAnalyst
    More analyst ratings

    $RBCN
    Press Releases

    Fastest customizable press release news feed in the world

    View All

    Rubicon Technology, Inc. completes acquisition of Janel Group LLC

    BENSENVILLE, Ill. and NEW YORK, Oct. 14, 2025 /PRNewswire/ -- Rubicon Technology, Inc. (OTCQB:RBCN) ("Rubicon") and Janel Corporation (OTCQX:JANL) ("Janel Corp") today announced that they have completed the previously announced transaction, pursuant to which Rubicon has acquired Janel Group LLC ("Janel Group"). Following the closing, Janel Group has become a wholly owned subsidiary of Rubicon and Janel Corp has received shares of Rubicon common stock in accordance with the terms of the definitive merger agreement entered into as of August 20, 2025. Janel Group, based in Garden City, New York, and originally founded in 1974, was a wholly owned subsidiary of Janel Corp. Janel Group had revenu

    10/14/25 4:15:00 PM ET
    $RBCN
    Semiconductors
    Technology

    Rubicon Technology, Inc. to acquire Janel Group LLC

    BENSENVILLE, Ill. and NEW YORK, Aug. 20, 2025 (GLOBE NEWSWIRE) -- Rubicon Technology, Inc. (OTCQB:RBCN) ("Rubicon") and Janel Corporation (OTCQX:JANL) ("Janel Corp") today announced that they have entered into a definitive merger agreement, pursuant to which Rubicon will acquire Janel Group LLC ("Janel Group") with Janel Group becoming a wholly owned subsidiary of Rubicon and Janel Corp receiving shares of Rubicon common stock. Janel Group, based in Garden City, New York, and originally founded in 1974, is a wholly owned subsidiary of Janel Corp. Janel Group had revenues of approximately $181.3 million and operating income of approximately $8.7 million for the 12-month period ended June

    8/20/25 6:06:58 PM ET
    $RBCN
    Semiconductors
    Technology

    Rubicon Technology Announces Voluntary Delisting from Nasdaq

    Bensenville, IL , Dec. 13, 2022 (GLOBE NEWSWIRE) -- Rubicon Technology, Inc. (NASDAQ:RBCN) announced that it has notified The Nasdaq Stock Market LLC ("Nasdaq") of the Company's decision to voluntarily delist its common stock from the Nasdaq Capital Market and its intent to file a Form 25 with the U.S. Securities and Exchange Commission (the "SEC") on or about December 23, 2022. As a result, the Company expects the delisting of its common stock to become effective on December 30, 2022. The Company anticipates that its common stock will be quoted on the Pink Sheets platform, which is operated by OTC Markets Group Inc.  (the "Pink Sheets"), and it currently intends to continue to provide in

    12/13/22 4:30:00 PM ET
    $RBCN
    Semiconductors
    Technology

    $RBCN
    SEC Filings

    View All

    SEC Form 15-15D filed by Rubicon Technology Inc.

    15-15D - Rubicon Technology, Inc. (0001410172) (Filer)

    3/30/23 5:18:05 PM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form 10-K filed by Rubicon Technology Inc.

    10-K - Rubicon Technology, Inc. (0001410172) (Filer)

    3/30/23 5:15:53 PM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form EFFECT filed by Rubicon Technology Inc.

    EFFECT - Rubicon Technology, Inc. (0001410172) (Filer)

    3/15/23 12:15:05 AM ET
    $RBCN
    Semiconductors
    Technology

    $RBCN
    Insider Trading

    Insider transactions reveal critical sentiment about the company from key stakeholders. See them live in this feed.

    View All

    SEC Form 4: Brog Timothy sold $79,462 worth of shares (52,624 units at $1.51), decreasing direct ownership by 91% to 4,969 units

    4 - Rubicon Technology, Inc. (0001410172) (Issuer)

    2/24/23 8:00:08 AM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form 3: New insider Eidinger John claimed no ownership of stock in the company

    3 - Rubicon Technology, Inc. (0001410172) (Issuer)

    8/29/22 6:22:52 PM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form 3: New insider Seirer Darren Clay claimed ownership of 451,842 shares

    3 - Rubicon Technology, Inc. (0001410172) (Issuer)

    8/29/22 6:08:28 PM ET
    $RBCN
    Semiconductors
    Technology

    $RBCN
    Financials

    Live finance-specific insights

    View All

    Rubicon Technology, Inc. Sets Record Date for its $11.00 per share Cash Distribution

    BENSENVILLE, IL., Aug. 12, 2022 (GLOBE NEWSWIRE) -- Rubicon Technology, Inc. (NASDAQ:RBCN) ("Rubicon" or the "Company") announced today that, in connection with the cash tender offer (the "Offer") by Janel Corporation ("Janel") for up to 45% of Rubicon's issued and outstanding common stock, par value $.001 per share ("Common Stock"), the Company's Board of Directors has set August 23, 2022 (the "Record Date") as the record date for its cash distribution of $11.00 per share of Common Stock (the "Distribution"). The Distribution and the Record Date are conditioned upon the consummation of the Offer by August 19, 2022. If such condition has occurred it is anticipated that the Distribution wil

    8/12/22 8:00:00 AM ET
    $RBCN
    Semiconductors
    Technology

    $RBCN
    Large Ownership Changes

    This live feed shows all institutional transactions in real time.

    View All

    SEC Form SC 13D/A filed by Rubicon Technology Inc. (Amendment)

    SC 13D/A - Rubicon Technology, Inc. (0001410172) (Subject)

    8/24/22 12:55:31 PM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form SC 13D/A filed by Rubicon Technology Inc. (Amendment)

    SC 13D/A - Rubicon Technology, Inc. (0001410172) (Subject)

    8/24/22 10:07:39 AM ET
    $RBCN
    Semiconductors
    Technology

    SEC Form SC 13D/A filed by Rubicon Technology Inc. (Amendment)

    SC 13D/A - Rubicon Technology, Inc. (0001410172) (Subject)

    8/23/22 4:18:02 PM ET
    $RBCN
    Semiconductors
    Technology