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        Signature
      
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        /s/ Adam K. Peterson
      
      
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        Stock symbol
      
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        NNI
      
      
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        Transactions as of
      
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        Jun 9, 2025
      
      
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        Transactions value $
      
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        $0
      
      
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        Form type
      
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        4
      
      
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        Date filed
      
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        6/10/2025, 07:01 PM
      
 
     
   
 
  
    Reporting Owners (3)
  
  
    
      
        
          | Name | Relationship | Address | Signature | Signature date | CIK | 
      
      
          
            | Peterson Adam K | Director, Other* | 1601 DODGE STREET, SUITE 3300, OMAHA | /s/ Adam K. Peterson | 2025-06-10 | 0001667769 | 
          
            | MAGNOLIA CAPITAL FUND, LP | Other* | 1601 DODGE STREET, SUITE 3300, OMAHA | /s/ Adam K. Peterson on behalf of the Magnolia Capital Fund, LP by its General Partner, The Magnolia Group, LLC | 2025-06-10 | 0001618333 | 
          
            | MAGNOLIA GROUP, LLC | Other* | 1601 DODGE STREET, SUITE 3300, OMAHA | /s/ Adam K. Peterson, managing member on behalf of The Magnolia Group, LLC | 2025-06-10 | 0001618376 | 
      
    
   
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | NNI | Class A Common Stock, Par Value $0.01 per Share | Other | $0 | -231K | -12.11% | $0.00 | 1.68M | Jun 9, 2025 | Direct | F1, F2, F3, F4, F5 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  TMG and Mr. Peterson disclaim beneficial ownership except to the extent of their respective pecuniary interests therein of shares except the 7,511 shares Mr. Peterson directly owns, and this report shall not be deemed an admission of beneficial ownership of these securities for Section 16 or for any other purposes.