Document:

EX-4.1

 Exhibit 4.1 

DYNAMICS RESEARCH CORPORATION 

and 
 AMERICAN STOCK
TRANSFER & TRUST COMPANY, LLC 
 as Rights Agent 

Amendment No. 1 to 
 Amended
and Restated Rights Agreement 
 Dated as of December 20, 2013 

 AMENDMENT NO. 1 TO AMENDED AND RESTATED RIGHTS AGREEMENT 

This Amendment No. 1 to Amended and Restated Rights Agreement dated as of December 20, 2013 (this “Amendment”) is
between Dynamics Research Corporation, a Massachusetts corporation (the “Company”), and American Stock Transfer & Trust Company, a limited liability trust company (the “Rights Agent”). 

W I T N E S S E T H: 

WHEREAS, on February 17, 1998, the Board of Directors of the Company (the “Board”) authorized the issuance of rights to
purchase, on the terms and subject to the provisions of the Rights Agreement dated February 17, 1998 (the “1998 Agreement”), one one-tenth of a share of the Company’s Series B Preferred Stock; 

WHEREAS, on July 23, 2008, the Company and the Rights Agent entered into an Amended and Restated Rights Agreement (the
“Agreement”) extending the term of the 1998 Agreement through 2018, among other changes; 
 WHEREAS, the Company, Engility
Corporation, a Delaware corporation (“Parent”), Engility Solutions, Inc. (“Merger Sub”), a Massachusetts corporation and a wholly-owned subsidiary of Parent, intend to enter into an Agreement and Plan of Merger (as
may be amended from time to time, the “Merger Agreement”) pursuant to which, among other things, Merger Sub will commence a tender offer for shares of common stock of the Company (the “Offer”), subject to the terms
and conditions set forth in the Merger Agreement, Merger Sub will acquire shares of common stock of the Company pursuant to the Offer and thereafter Merger Sub will merge with the Company (the “Merger”) and each remaining share of
common stock of the Company will be converted into the right to receive cash consideration, upon the terms and subject to the conditions of the Merger Agreement; 

WHEREAS, in connection with the Merger, Parent and the Company have proposed to enter into a tender and support agreement with each of the
directors of the Company and David Keleher, Senior Vice President, Chief Financial Officer, and Treasurer of the Company (collectively, with their Affiliates, the “Significant Stockholders”), pursuant to which, among other things,
each Significant Stockholder would agree to (i) tender the shares of the Company’s Common Stock (as defined in the Agreement) beneficially owned by it in the Offer and (ii) support the Merger and the other transactions described in
the Merger Agreement; and 
 WHEREAS, the Company and the Rights Agent now desire to amend the Agreement as set forth in this Amendment, and
the Board hereby directs, pursuant to Section 27 of the Rights Agreement, that the Rights Agreement shall be amended as set forth in this Amendment. 

NOW, THEREFORE, in consideration of the premises and the mutual agreements herein set forth, the parties hereto hereby agree as follows: 

Section 1. Certain Definitions. Capitalized terms used but not defined herein shall have the meanings ascribed to such terms in the Agreement. 

  
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 Section 2. Amendments to Section 1 of the Agreement. 

(a) Section 1 of the Agreement is hereby amended by inserting the following definitions therein, in proper alphabetical order: 

“Merger” shall mean the transaction pursuant to which Merger Sub will be merged with and into the Company with the Company as
the surviving corporation. 
 “Merger Agreement” shall mean the Agreement and Plan of Merger by and among the Company,
Merger Sub and Parent, as the same may be amended from time to time. 
 “Merger Sub” shall mean Engility Solutions, Inc., a
Massachusetts corporation and a wholly-owned subsidiary of Parent. 
 “Offer” shall mean the offer by Merger Sub to purchase
shares of Common Stock pursuant to and subject to the terms of the Merger Agreement. 
 “Parent” shall mean Engility
Corporation, a Delaware corporation. 
 “Parent Group” shall mean, collectively, Parent, Merger Sub and any of their
respective Affiliates. 
 “Significant Stockholder” shall mean each of the directors of the Company and David Keleher,
Senior Vice President, Chief Financial Officer, and Treasurer of the Company and any of their respective Affiliates. 
 “Top-Up
Option” shall mean the option for Merger Sub to purchase from the Company shares of Common Stock pursuant to and subject to the terms of the Merger Agreement. 

“Voting Agreements” means any agreements disclosed to the Company on or prior to the date hereof, that are entered into, or to
be entered into, between any Significant Stockholder and Parent or Merger Sub or both pursuant to which such Significant Stockholder agrees, among other things, to tender shares of Common Stock beneficially owned by it in the Offer, vote the shares
of Common Stock held by it in favor of the Merger or grant Parent an irrevocable proxy with respect thereto. 
 (b) The definition of
“Acquiring Person” in Section 1 of the Agreement is hereby amended by inserting the following sentence at the end thereof: 

“Notwithstanding the foregoing or any other provision of this Agreement to the contrary, none of (i) the execution and delivery of
the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or performance of each Voting Agreement or any
agreements, arrangements or understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger Agreement, the Offer, the exercise or issuance of
the Top-Up Option or the Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or (vi) the consummation of any other transactions contemplated by the Merger Agreement or required
by or provided for in the Voting Agreements shall be deemed to result in the Parent Group, any member thereof, or any Significant Stockholder becoming an Acquiring Person.” 

  
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 (c) The definition of “Common Stock Event” in Section 1 of the Rights
Agreement is hereby amended by inserting the following sentence at the end thereof: 
 “Notwithstanding the foregoing or any other
provision of this Agreement to the contrary, none of (i) the execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement,
(ii) the execution and delivery or performance of each Voting Agreement or any agreements, arrangements or understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements,
(iii) the announcement of the Merger Agreement, the Offer, the exercise or issuance of the Top-Up Option or the Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or
(vi) the consummation of any other transactions contemplated by the Merger Agreement or required by or provided for in the Voting Agreements shall be deemed to result in a Common Stock Event.” 

(d) The definition of “Distribution Date” in Section 1 of the Rights Agreement is hereby amended by inserting the
following sentence at the end thereof: 
 “Notwithstanding the foregoing or any other provision of this Agreement to the contrary, none
of (i) the execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or
performance of each Voting Agreement or any agreements, arrangements or understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger
Agreement, the Offer, the exercise or issuance of the Top-Up Option or the Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or (vi) the consummation of any other transactions
contemplated by the Merger Agreement or required by or provided for in the Voting Agreements shall be deemed to result in a Distribution Date.” 

(e) The definition of “Stock Acquisition Date” in Section 1 of the Rights Agreement is hereby amended by inserting the
following sentence at the end thereof: 
 “Notwithstanding the foregoing or any other provision of this Agreement to the contrary, none
of (i) the execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or
performance of each Voting Agreement or any agreements, arrangements or understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger
Agreement, the Offer, the exercise or issuance of the Top-Up Option or the Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, (vi) the consummation of any other transactions
contemplated by the Merger Agreement or required by or provided for in the Voting Agreements or (vii) the actual knowledge by any executive officer of the Company of any of the foregoing shall be deemed to result in a Stock Acquisition
Date.” 

  
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 Section 3. Amendment to Section 3 of the Agreement. Section 3 of the Agreement is hereby amended
by adding the following as a new Section 3(d): 
 “Notwithstanding anything in this Agreement to the contrary, no member of the
Parent Group or any Significant Stockholder shall become an Acquiring Person, either individually or collectively, no Distribution Date, Common Stock Event or Stock Acquisition Date shall be deemed to occur, no Rights shall be issued or become
issuable, be distributed or become distributable, separate or become separable from the Common Stock, or otherwise become exercisable and no adjustment shall be made pursuant to Section 11 of this Agreement, in each case by virtue of
(i) the execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or performance
of each Voting Agreement or any agreements, arrangements or understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger Agreement, the
Offer, the exercise or issuance of the Top-Up Option or the Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or (vi) the consummation of any other transactions contemplated
by the Merger Agreement or required by or provided for in the Voting Agreements.” 
 Section 4. Amendment to Section 7(a) of the Agreement.
Section 7(a) of the Agreement is hereby amended by deleting Section 7(a) and substituting the following in lieu thereof: 

“(a) Except as otherwise provided herein, the registered holder of any Rights Certificate may exercise the Rights evidenced thereby in
whole or in part at any time from and after the Distribution Date and at or prior to the earlier of (i) the Close of Business on July 27, 2018 or (ii) immediately prior to the Effective Time (as defined in the Merger Agreement), but
only if the Effective Time shall occur (the earlier of such events being referred to herein as the “Expiration Date”), or the earlier redemption of the Rights. At the Expiration Date (or the earlier redemption of the Rights), all Rights
shall be extinguished, all Rights Certificates shall become null and void and this Agreement shall terminate and be of no further force or effect. To exercise Rights, the registered holder of the Rights Certificate evidencing such Rights shall
surrender such Rights Certificate, with the form of election to purchase on the reverse side thereof and the certificate contained therein duly executed, to the Rights Agent at the office of the Rights Agent designated for such purpose, accompanied
by a signature guarantee and such other documentation as the Rights Agent may reasonably request, together with payment in cash, only if by electronic or wire transfer, or by certified check or bank check, of the Purchase Price with respect to the
total number of one one-hundredths of a share of Preferred Stock (or, after a Common Stock Event, shares and/or similar units of Common Stock or Other Consideration) as to which the Rights are exercised (which payment shall include any additional
amount payable by such Person in accordance with Section 9(d) hereof). The Rights Agent shall promptly deliver to the Company all payments of the Purchase Price received in respect of Rights Certificates accepted for exercise. The Company shall
inform the Rights Agent of the occurrence of the Effective Time promptly thereafter.” 
 Section 5. Amendment to Section 11(a)(ii) of the
Agreement. Section 11(a)(ii) of the Agreement is hereby amended by adding the following sentence at the end of the last paragraph thereof: 

“Notwithstanding the foregoing or anything in this Agreement to the contrary, no adjustment shall be made and no other action shall be
taken or obligation shall arise pursuant to this Section 11(a)(ii) by virtue of (i) the execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into

  
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by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or performance of each Voting Agreement or any agreements, arrangements or
understandings entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger Agreement, the Offer, the exercise or issuance of the Top-Up Option or the
Merger, (iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or (vi) the consummation of any other transactions contemplated by the Merger Agreement or required by or provided for in the
Voting Agreements.” 
 Section 6. Amendment to Section 13 of the Agreement. Section 13 of the Agreement is hereby amended by adding
the following sentence at the end thereof: 
 “Notwithstanding the foregoing or anything in this Agreement to the contrary, no provision
for any issuance or distribution of rights shall be made, and no other action shall be taken or obligation shall arise pursuant to this Section 13, by virtue of (i) the execution and delivery of the Merger Agreement or any agreements,
arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the execution and delivery or performance of each Voting Agreement or any agreements, arrangements or understandings
entered into by the Parent Group or any Significant Stockholder required or contemplated by the Voting Agreements, (iii) the announcement of the Merger Agreement, the Offer, the exercise or issuance of the Top-Up Option or the Merger,
(iv) the consummation of the Offer or the Merger, (v) the issuance or exercise of the Top-Up Option, or (vi) the consummation of any other transactions contemplated by the Merger Agreement or required by or provided for in the Voting
Agreements.” 
 Section 7. Amendment to Section 25 of the Agreement. Section 25 of the Agreement is hereby amended by adding the
following sentence at the end thereof: 
 “Notwithstanding the foregoing, no such notice shall be required by virtue of (i) the
execution and delivery of the Merger Agreement or any agreements, arrangements or understandings entered into by the Company or the Parent Group contemplated by the Merger Agreement, (ii) the announcement of the Merger Agreement or the Merger,
(iii) the consummation of the Offer or the Merger, (iv) the exercise of the Top-Up Option, or (v) the consummation of any other transactions contemplated by the Merger Agreement.” 

Section 8. Amendment to Section 26 of the Agreement. Section 26 of the Agreement is hereby amended by deleting the phrase “60 Frontage
Road, Andover, MA 01810-5498” and inserting in its place “Two Tech Drive, Andover, MA 01810”. 
 Section 9. Effectiveness. Nothing in
this Agreement shall be construed to give to any Person other than the Company, the Rights Agent, and the registered holders of the Rights (and, prior to the Distribution Date, the associated shares of Common Stock) any legal or equitable right,
remedy, or claim under this Agreement or the Rights; but this Agreement shall be for the sole and exclusive benefit of the Company, the Rights Agent, and the registered holders of the Rights (and, prior to the Distribution Date, the associated
Common Stock). 
 Section 10. Severability. The invalidity or unenforceability of any term or provision of this Amendment shall not affect the
validity or enforceability of any other term or provision hereof. If any term, provision, 

  
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covenant or restriction of this Amendment is held by a court of competent jurisdiction or other authority to be invalid, void or unenforceable, the remainder of the terms, provisions, covenants
and restrictions of this Amendment and the Agreement shall remain in full force and effect and shall in no way be affected, impaired or invalidated. 

Section 11. Governing Law. This Amendment shall be deemed to be a contract made under the laws of The Commonwealth of Massachusetts and for all
purposes shall be governed by and construed in accordance with the laws of said State applicable to contracts to be made and performed entirely within said State. 

Section 12. Counterparts. This Amendment may be executed in any number of counterparts and each of such counterparts shall for all purposes be deemed
to be an original, and all such counterparts shall together constitute but one and the same instrument. 
 Section 13. Descriptive Headings.
Descriptive headings of the several Sections of this Amendment are inserted for convenience only and shall not control or affect the meaning or construction of any of the provisions hereof. 

[Remainder of Page Intentionally Left Blank] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and set
their respective hands and seals, all as of the day and year first above written. 
  

			
	DYNAMICS RESEARCH CORPORATION
		
	By:	 	 /s/ James P. Regan

	Title:	 	Chairman, President and Chief Executive Officer
	
	AMERICAN STOCK TRANSFER & TRUST COMPANY LLC, AS RIGHTS AGENT
		
	By:	 	 /s/ Paula Caroppoli

	Title:	 	Senior Vice President

  
 7EX-10.1

 Exhibit 10.1 

FIRST MODIFICATION TO PROMISSORY NOTE 

THIS MODIFICATION TO PROMISSORY NOTE (this “Modification”) is entered into as of December 23, 2013, by and between ROANOKE GAS
COMPANY (“Borrower”), and WELLS FARGO BANK, NATIONAL ASSOCIATION (“Bank”). 
 RECITALS 

WHEREAS, Borrower is currently indebted to Bank pursuant to the terms and conditions of that certain Revolving Line of Credit in the maximum
principal amount of $7,000,000.00, executed by Borrower and payable to the order of Bank, dated as of March 31, 2013 (the “Note”), which Note is subject to the terms and conditions of a loan agreement between Borrower and Bank dated
as of March 30, 2012, as amended from time to time (the “Credit Agreement”). 
 WHEREAS, Bank and Borrower have agreed to
certain changes in the terms and conditions set forth in the Note, and have agreed to modify the Note to reflect said changes. 
 NOW,
THEREFORE, for valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree that the Note shall be modified as follows: 

1. The maximum principal amount available under the Note is hereby modified to be Eight Million Dollars ($8,000,000.00). 

2. Paragraph (b) items (iii) and (iv) under BORROWING AND REPAYMENT of the Note are hereby deleted in their entirety and the
following substituted therefor; 
 “(iii) $8,000,000.00 from November 23, 2013, up to and including January 24, 2014; 

(iv) $6,000,000.00 from January 25, 2014 up to and including February 28, 2014;” 

3. Except as expressly set forth herein, all terms and conditions of the Note remain in full force and effect, without waiver or modification,
and Borrower hereby ratifies and confirms all provisions of said Note, including any confession of judgment that may be contained therein. All terms defined in the Note shall have the same meaning when used in this Modification. This Modification
and the Note shall be read together, as one document. 
 4. Borrower certifies that as of the date of this Modification there exists no
Event of Default under the Note, nor any condition, act or event which with the giving of notice or the passage of time or both would constitute any such Event of Default. 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Modification to be executed as of the day
and year first written above. 
  

									
	ROANOKE GAS COMPANY	 		 	WELLS FARGO BANK, NATIONAL ASSOCIATION
					
	By:	 	 /s/ Paul W. Nester
	 		 	By:	 	 /s/ Arnold W. Adkins, Jr.

	Name:	 	 Paul W. Nester
	 		 		 	Arnold W. Adkins, Jr., Senior Vice President
	Title:	 	 VP, Treas. & CFO
	 		 		 	
					
	By:	 	 /s/ Howard T. Lyon
	 		 		 	
	Name:	 	 Howard T. Lyon
	 		 		 	
	Title:	 	 Asst. Secretary & Asst. Treasurer
	 		 		 	

  
 -2-

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