Document:

Exhibit 10.50

 Exhibit 10.50 
 Deltek Systems, Inc. 
 Stock Purchase Agreement 
 STOCK PURCHASE AGREEMENT, dated [            ] (the
“Agreement”), by and between Deltek Systems, Inc., a Virginia corporation (the “Company”), and [            ]
(“Purchaser”). 
 Recitals 
 WHEREAS, the Company desires to sell to Purchaser, and Purchaser desires to purchase, shares of the Company’s common stock, par value $0.001 (the “Common Stock”); and 
 WHEREAS, as a condition to such sale and purchase, Purchaser will execute and deliver to the Company the Shareholder’s Agreement provided to
Purchaser herewith (the “Shareholder’s Agreement”). 
 NOW, THEREFORE, in consideration of the premises and the
mutual covenants set forth in this Agreement, and for good and valuable consideration, receipt of which is hereby acknowledged, the Company and Purchaser, intending to be legally bound, hereby agree as follows: 
 1. Purchase of Shares. 
 (a) Sale and Purchase. On the terms and conditions set forth in this Agreement, the Company agrees to sell to Purchaser, and Purchaser agrees to purchase from the Company,
[            ] shares of Common Stock (the “Shares”). 
 (b) Consideration. The Purchaser agrees to pay for the Shares an aggregate purchase price of $[            ] (the “Purchase
Price”). 
 2. Closing of the Purchase. 
 (a) Closing. The closing of the transaction contemplated by this Agreement (the “Closing”)
shall occur on [            ] (the “Closing Date”) at the offices of Fried, Frank, Harris, Shriver & Jacobson LLP, One New York Plaza, New York, New
York. 
 (b) Deliveries. At the Closing, (i) the Company shall deliver to Purchaser a certificate representing the
Shares and a copy of the Shareholder’s Agreement executed by the Company, New Mountain Partners II, L.P., New Mountain Affiliated Investors II, L.P. and Allegheny New Mountain Partners, L.P., and (ii) Purchaser shall deliver to the Company
a copy of the Shareholder’s Agreement executed by the Purchaser and, where applicable, her spouse, and a good check or wire transfer of funds in an amount equal to the Purchase Price. 
 (c) Conditions to Closing. 
 i. Conditions to Both Parties’ Obligations. The obligations of the parties to consummate the transactions contemplated by this Agreement are subject to the fulfillment prior 

 
to or at the Closing of the condition (which may be waived by the parties in accordance herewith) that, on the Closing Date, there shall not be in effect any
order issued by a court of competent jurisdiction restraining or prohibiting consummation of the transactions contemplated by this Agreement. 
 ii. Conditions to Company’s Obligations at Closing. Each and every obligation of the Company to be performed at the Closing shall be subject to the conditions precedent that the representations made by
Purchaser in this Agreement shall be accurate in all material respects on and as of the Closing Date with the same effect as though such representations had been made or given on or as of the Closing Date and that Purchaser shall have performed all
covenants required to be performed at or prior to the Closing. 
 iii. Conditions to Purchaser’s Obligations at
Closing. Each and every obligation of Purchaser to be performed at the Closing shall be subject to the conditions precedent that the representations made by the Company in this Agreement shall be accurate in all material respects on and as of
the Closing Date with the same effect as though such representations had been made or given on or as of the Closing Date and that the Company shall have performed all covenants required to be performed at or prior to the Closing. 
 (d) Survival. All representations made by the Company and Purchaser shall survive the Closing. 
 3. Representations and Warranties of Purchaser. Purchaser represents and warrants to the Company as follows: 
 (a) Purchaser has the legal capacity to execute, deliver and perform this Agreement and the Shareholder’s Agreement and to consummate
the transactions contemplated hereby. This Agreement and, when executed and delivered, the Shareholder’s Agreement, constitute valid and binding obligations of Purchaser, enforceable against Purchaser in accordance with the terms hereof and
thereof, except to the extent that such enforceability may be limited by bankruptcy, insolvency or other similar laws or by general equitable principles. 
 (b) Purchaser’s principal address is listed below Purchaser’s signature on the signature page hereto. 
 (c) Purchaser is acquiring the Shares for investment purposes only for Purchaser’s own account, and not as a nominee or agent, and not with a view to the resale or distribution of all or any part of the Shares.
Purchaser is prepared to hold the Shares for an indefinite period and has no present intention of selling, granting any participation in, or otherwise distributing any of the Shares. Purchaser does not have any contract, undertaking, agreement or
arrangement with any person to sell, transfer or grant a participating interest in any of the Shares. 
 (d) Purchaser is
knowledgeable about the Company, and Purchaser has sufficient knowledge and experience in financial and business matters in general that Purchaser is capable of evaluating the Company and the business thereof and the risk and merits of investment in
the Company and of making an informed investment decision thereon. 
  

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 (e) Purchaser has been furnished with, and has had access to, such information as
Purchaser considers necessary or appropriate for deciding whether to invest in the Shares, and Purchaser has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the purchase of the Shares.

 (f) Purchaser has been informed, understands and acknowledges that Purchaser’s investment in the Shares is a
speculative investment and involves a high degree of risk, and that the amount realized on such investment may be less than the amount invested. In evaluating Purchaser’s investment in the Shares, Purchaser consulted with investment, legal and
tax advisors and concluded that such investment is not inconsistent with and is appropriate in light of Purchaser’s overall investment objectives, financial condition and liquidity requirements. Purchaser is familiar with the nature of and
risks attendant to an investment of the type contemplated hereby and the tax aspects of an investment of such type, is financially and otherwise capable of bearing the economic risk of such investment, and can afford the loss of the total amount of
such investment. 
 (g) Purchaser does not have an overall commitment to investments which are not readily marketable that is
disproportionate to Purchaser’s net worth, and Purchaser’s investment in the Shares will not cause such overall commitment to become excessive. Purchaser has adequate net worth and means of providing for Purchaser’s current needs and
contingencies and has no need for liquidity in such investment. 
 (h) Purchaser understands that the Shares are not being
registered under the Securities Act of 1933, as amended (the “Securities Act”), or any state securities laws in reliance upon specific exemptions thereunder for transactions not involving any public offering, and the
availability of such exemptions depends in part upon the accuracy of Purchaser’s representations and warranties herein and that the Shares are characterized as “restricted securities” under federal securities laws and that under such
laws and applicable regulations such securities may be resold without registration under the Securities Act only in certain limited circumstances. Purchaser also understands that there is no public market for the Shares and that the sale or transfer
of the Shares is also restricted by the terms of the Shareholder’s Agreement and applicable state law. 
 (i) The sale of
the Shares contemplated by this Agreement does not conflict with, or result in a breach of, or a default under, or give rise to a right of acceleration under, any agreement or instrument to which Purchaser is a party. 
 (j) Purchaser has initialed the appropriate box below her signature indicating whether Purchaser is an “accredited investor” as
such term is defined on Exhibit A hereto. 
 (k) Purchaser has received a copy of the Shareholder’s
Agreement and has had an opportunity to review and ask questions about such Shareholder’s Agreement. Purchaser understands that the Shares will be bound by all of the terms, conditions, restrictions and obligations set forth in the
Shareholder’s Agreement as the same may be amended from time to time. 
  

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 4. Representations and Warranties of the Company. The Company represents and warrants to Purchaser
as follows: 
 (a) All corporate action on the part of the Company, its officers, directors and shareholders necessary for the
authorization, execution and delivery of, and the performance of all obligations of the Company under, this Agreement has been taken or will be taken prior to the Closing, and this Agreement constitutes valid and legally binding obligations of the
Company, enforceable in accordance with its terms, except as may be limited by (i) applicable bankruptcy, insolvency, reorganization or others laws of general application relating to or affecting the enforcement of creditors’ rights
generally and (ii) the effect of rules of law governing the availability of equitable remedies. 
 (b) The sale of the
Shares contemplated by this Agreement does not conflict with, or result in a breach of, or a default under, or give rise to a right of acceleration under, the Company’s Bylaws or Articles of Incorporation, or any agreement or instrument to
which Purchaser is a party. 
 5. Intentionally omitted. 
 6. No Retention Rights. Nothing in this Agreement shall confer upon Purchaser any right to continue to provide services to the Company for any
period of specific duration or interfere with or otherwise restrict in any way the rights of the Company (or any subsidiary of the Company retaining the services of Purchaser) or of Purchaser, which rights are hereby expressly reserved by each, to
terminate such services at any time and for any reason, with or without cause. 
 7. Legends. 
 (a) All certificates evidencing the Shares shall bear the following legend: 
 “THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES
LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF EXCEPT IN COMPLIANCE WITH SUCH ACT OR LAWS AND EXCEPT IN ACCORDANCE WITH THE PROVISIONS OF A SHAREHOLDER’S AGREEMENT WITH THE COMPANY, A COPY OF WHICH
IS AVAILABLE FOR INSPECTION AT THE OFFICES OF THE COMPANY.” 
 (b) If required by the authorities of any state in
connection with the issuance of the Shares, the legend or legends required by such state authorities shall also be endorsed on all such certificates. 
 8. Entire Agreement. This Agreement and the Shareholder’s Agreement contain the entire agreement between the parties with respect to the Shares purchased hereunder. Any oral or written agreements,
representations, warranties, written inducements, or other communications made prior to the execution of this Agreement with respect to the Shares purchased hereunder shall be void and ineffective for all purposes. 
  

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 9. Governing Law. The validity, construction and effect of this Agreement shall be determined
exclusively in accordance with the laws of the State of New York, without regard to its provisions concerning the applicability of laws of other jurisdictions. Any suit with respect hereto will be brought in courts of the State of New York in New
York county and the United States District Court for the Southern District of New York, and Purchaser hereby agrees and submits to the personal jurisdiction and venue thereof. 
 10. Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together
shall constitute one and the same instrument. 
 11. Headings. The headings in this Agreement are for reference purposes only and
shall not affect the meaning or interpretation of this Agreement. 
 12. Waiver of Jury Trial. EACH PARTY HERETO HEREBY WAIVES, TO THE
FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT AND EXECUTIVE’S SERVICES TO THE
COMPANY. 
 13. Expenses. Each party hereto shall pay all costs and expenses that such party incurs with respect to the negotiation,
execution, delivery and performance of this Agreement. 
 14. Successors and Assigns; Amendment. The terms and conditions of this
Agreement shall inure to the benefit of and be binding upon the respective successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective
successors and assigns any rights, remedies, obligations or liabilities under or by reason of this Agreement, except expressly as provided in this Agreement. Any term of this Agreement may be amended and the observance of any term of this Agreement
may be waived (either generally or in a particular instance and either retroactively or prospectively) only with the written consent of the Company and Purchaser. 
  

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 IN WITNESS WHEREOF, each party hereto has caused this Agreement to be duly executed as of the date first
written above. 
  

			
	Deltek Systems, Inc.
		
	By:	 	  
	Name:	 	
	Title:	 	
	
	  
	[            ]
	
	Please print address:
	
	  
	
	  
	
	  
	
	 ̈ Purchaser is an Accredited Investor
	
	 ̈ Purchaser is not an Accredited Investor

 EXHIBIT A 
 Accredited Investor Definition 
 The term “Accredited Investor” as used herein refers to:

 a. A person or entity who is a director or executive officer of the Company; 
 b. Any private business development company as defined in Section 202(a)(22) of the Investment Advisers Act of 1940; 
 c. Any organization described in Section 501(c)(3) of the Internal Revenue Code, corporation, Massachusetts or similar business trust, or
partnership, not formed for the specific purpose of acquiring the securities offered, with total assets in excess of $5,000,000; 
 d. Any
natural person who had an individual net worth, or joint worth with that person’s spouse, at the time of his or her purchase which exceeds $1,000,000; 
 e. Any natural person who had an individual income in excess of $200,000 in each of the two most recent years or joint income with that person’s spouse in excess of $300,000 in each of those years and has a
reasonable expectation of reaching the same income level in the current year; 
 f. Any trust, with total assets in excess of $5,000,000, not
formed for the specific purpose of acquiring the securities offered, whose purchase is directed by a person who has such knowledge and experience in financial and business matters that he or she is capable of evaluating the merits and risks of the
prospective investment; or 
 g. Any entity in which all of the equity owners are accredited investors. 
 As used in this definition, the term “net worth” means the excess of total assets over total liabilities. For the purpose of determining a
person’s net worth, the principal residence owned by an individual should be valued at fair market value, including the cost of improvements, net of current encumbrances.Exhibit 10.51

 Exhibit 10.51 
 AGREEMENT 
 This AGREEMENT (the “Agreement”), is entered into as of
[                    ], by and between Deltek Systems, Inc., a Virginia corporation (the “Company”), and
[                    ] (the “[Director/Executive]”). 
 WHEREAS, the [Director is a non-employee director of the Company/ Executive is an executive officer of the Company]; and 
 WHEREAS, on [                    ], the [Director/Executive] purchased
[                    ] shares of common stock, par value $0.001 per share, of the Company (the “Common Stock”), for a
purchase price of $7.22 per share (the “Share Purchase”); and 
 WHEREAS, at the time of the Share Purchase, the Company had
concluded that the fair value of a share of Common Stock was $7.22; and 
 WHEREAS, the Company subsequently obtained a third party valuation
of the Common Stock which concluded that the fair value of a share of Common Stock at the time of the Share Purchase was $9.00 per share, rather than $7.22 per share; and 
 WHEREAS, by reason of this valuation difference, the [Director/Executive] acquired [                    ]
shares of Common Stock in excess of the shares she would have acquired in connection with the Share Purchase had a price of $9.00 per share been used (such
[                    ] shares, the “Excess Shares”); 
 NOW, THEREFORE, in consideration of the premises and the mutual covenants set forth in this Agreement, and for good and valuable consideration, receipt
of which is acknowledged, the Company and [Director/Executive], intending to be legally bound, agree as follows: 
 1. Return of the
Excess Shares to the Company. The [Director/Executive] hereby delivers to the Company, and the Company hereby accepts from the [Director/Executive],
[                    ] shares of Common Stock, which number of shares constitutes the Excess Shares. 
 2. Issuance of a New Stock Certificate. The [Director/Executive] authorizes and directs the Company, on her behalf and in her stead, to effect
such delivery by cancelling stock certificate number [                    ] and issuing a stock certificate (the “Replacement
Certificate”) to the [Director/Executive] representing [                    ] shares. The Replacement Certificate shall bear the
legend set forth in Section 7 of the Stock Purchase Agreement, dated as of [                    ], to which the Company and the
[Director/Executive] are parties (the “Stock Purchase Agreement”) and shall continue to be subject to the terms and conditions of the Stock Purchase Agreement and the Shareholder’s Agreement, dated as of
[                    ], to which the Company and the [Director/Executive] are parties (the “Shareholder’s Agreement”).

 3. Amendment of the Stock Purchase Agreement. This Agreement modifies the Stock Purchase Agreement by deleting the number
[                    ] in Section 1(a) of the Stock Purchase Agreement and inserting the number
[                    ] in its place. 

 4. No Effect on Other Agreements. No provision of this Agreement shall be deemed to alter or
impair the rights or obligations of the Company or the [Director/Executive] under the Shareholder’s Agreement or, except as set forth in Section 3 of this Agreement, under the Stock Purchase Agreement. 
 IN WITNESS WHEREOF, each party hereto has caused this Agreement to be duly executed as of the date first written above. 
  

									
		 		 	DELTEK SYSTEMS, INC.
					
		 		 		 	By:	 	  
				
		 		 		 	Date:

  

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