EX-10.21



 Exhibit 10.21 
  





 
 100 Old River Road, Unit 100 

Andover, MA 01810 USA 

Phone: 978-688-6706  Fax: (978) 688-6584 
 Web: http://casa-systems.com 

 
  

February 1, 2017 
 To the Lenders party to the Credit
Agreement 
 referred to below 
 and JPMorgan Chase Bank, N.A.,

 as Administrative Agent 
  

	 	Re:	Casa Systems, Inc. – Credit Agreement 

 Ladies and Gentlemen: 

Reference is made hereby to that certain Credit Agreement dated as of December 20, 2016 (as amended, restated, amended and restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”) by and among Casa Systems, Inc., a Delaware corporation (the “Borrower”), JPMorgan Chase Bank, N.A., as administrative agent (in such
capacity, together with its affiliates, including any successor thereto, the “Administrative Agent”), and each lender from time to time party thereto (collectively, the “Lenders” and individually, a
“Lender”). Capitalized terms that are used but not otherwise defined herein shall have the respective meanings assigned thereto under the Credit Agreement. 

In accordance with Section 7.06(r) of the Credit Agreement, the Borrower is entitled to pay the Dividend (up to $300,000,000) on or
prior to February 3, 2017 (the “Initial Date”). Prior to the date hereof, the Borrower has paid $200,000,000 of the Dividend. Please be advised that that the Borrower has requested that the Administrative Agent consent to the
extension of the Initial Date to April 15, 2017 (the “Extended Date”), as the Borrower has informed the Administrative Agent that it anticipates paying the remaining $100,000,000 of the Dividend on or prior to the Extended
Date. Accordingly, pursuant to Section 7.06(r) of the Credit Agreement, the Administrative Agent has agreed to permit the payment of such amount on or prior to the Extended Date. 

[Remainder of page intentionally left blank] 








			
	Very truly yours,
	
	CASA SYSTEMS, INC., as the Borrower
		
	By:	 	 /s/ Gary Hall

	Name:	 	Gary Hall
	Title:	 	CFO








 



 
 100 Old River Road, Unit 100 

Andover, MA 01810 USA 

Phone: 978-688-6706  Fax: (978) 688-6584 

Web: hctp:Jlcasa-systems.com 
  

 
 April 14, 2017 

To the Lenders party to the Credit Agreement 
 referred to below

 and JPMorgan Chase Bank, N.A., 
 as Administrative Agent 

 

	 	Re:	Casa Systems, Inc. – Credit Agreement 

 Ladies and Gentlemen: 

Reference is made hereby to that certain Credit Agreement dated as of December 20, 2016 (as amended, restated, amended and restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”) by and among Casa Systems, Inc., a Delaware corporation (the “Borrower”), JPMorgan Chase Bank, N.A., as administrative agent (in such
capacity, together with its affiliates, including any successor thereto, the “Administrative Agent”), and each lender from time to time party thereto (collectively, the “Lenders” and individually, a
“Lender”). Capitalized terms that are used but not otherwise defined herein shall have the respective meanings assigned thereto under the Credit Agreement. 

In accordance with Section 7.06(r) of the Credit Agreement, the Borrower is entitled to pay the Dividend (up to $300,000,000) on
or prior to February 3, 2017 (the “Initial Date”). Prior to the date hereof, the Borrower has paid $200,000,000 of the Dividend. The Administrative Agent has previously consented to an extension of that Initial Date to
April 15, 2017 (the “First Extended Date”). Please be advised that that the Borrower has requested that the Administrative Agent consent to the further extension of the Initial Date to May 15, 2017 (the “Second
Extended Date”), as the Borrower has informed the Administrative Agent that it anticipates paying the remaining $100,000,000 of the Dividend on or prior to the Second Extended Date. Accordingly, pursuant to Section 7.06(r) of
the Credit Agreement, the Administrative Agent has agreed to permit the payment of such amount on or prior to the Second Extended Date. 

[Remainder of page intentionally left blank] 








			
	Very truly yours,
	
	CASA SYSTEMS, INC., as the Borrower
		
	By:	 	 /s/ Gary Hall

	Name:	 	Gary Hall
	Title:	 	Chief Financial Officer