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Exhibit 10.51    
  

 
 

SECOND AMENDMENT TO
  REGISTRATION RIGHTS AGREEMENT    
  

        This Second Amendment to Registration Rights Agreement (this "Amendment") is entered into as of December 21, 2002, by and among Brigham Exploration Company, a
Delaware corporation (the "Company"), and the Credit Suisse First Boston entities listed on Schedule A hereto (the "CSFB Entities"). 

 
 

RECITALS    
  

        WHEREAS, pursuant to that certain Registration Rights Agreement, dated as of November 1, 2000 (the "Agreement"), by and among the Company, DLJMB Funding III,
Inc., a Delaware corporation, and DLJ ESC II, L.P., a Delaware limited partnership (collectively, the "November 2000 Investors"), the Company provided certain registration rights to the November 2000
Investors regarding shares of the Company's common stock issuable upon exercise of warrants issued by the Company to the November 2000 Investors; 

        WHEREAS,
pursuant to that certain First Amendment to Registration Rights Agreement, dated March 5, 2001 (the "March 2002 Amendment"), by and among the Company, each of the November 2000
Investors, DLJ Merchant Banking Partners III, L.P., a Delaware limited partnership, and DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III, C.V., a
Netherlands Antilles limited partnership (collectively, the "March 2001 Investors"), the Company provided certain registration rights under the Agreement to the March 2001 Investors regarding shares
of the Company's common stock issuable upon exercise of warrants issued by the Company to the March 2001 Investors; 

        WHEREAS,
each of the November 2000 Investors is a party to a certain Warrant Certificate (the "November 2000 Warrant Certificates"), dated as of November 1, 2000, by and between
the Company and such investor; 

        WHEREAS,
each of the March 2001 Investors is a party to a certain Warrant Certificate (the "March 2001 Warrant Certificates"), dated as of March 5, 2001, by and between the
Company and such investor; 

        WHEREAS,
each of DLJ Merchant Banking Partners III, L.P., a Delaware limited partnership; DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners
III, C.V., a Netherlands Antilles limited partnership; DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-1, C.V. and as attorney-in-fact for DLJ
Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-1, C.V., a Netherlands Antilles limited partnership; DLJ Merchant Banking III, Inc., as Advisory General Partner
on behalf of DLJ Offshore Partners III-2, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-2, C.V., a Netherlands Antilles
limited partnership; DLJ MB Partners III GmbH & Co. KG, a German limited partnership; Millennium Partners II, L.P., a Delaware limited partnership; and MBP III Plan Investors, L.P., a Delaware limited
partnership (collectively, the "December 2002 Investors, and together with the November 2000 Investors and the March 2001 Investors, the "Investors") is a party to a certain Warrant Certificate (the
"December 2002 Warrant Certificates," and together with the November 2000 Warrant Certificates and the March 2001 Warrant Certificates, the "Warrant Certificates"), dated as of December 20, 2002, by
and between the Company and such investor; 

        WHEREAS,
the December 2002 Warrant Certificates were executed and delivered in connection with the consummation of transactions contemplated by that certain Securities Purchase
Agreement, dated December 20, 2002, by and among the Company and the December 2002 Investors; 

 

        WHEREAS,
pursuant to the Warrant Certificates, each Holder (as defined in the Agreement) has been issued a warrant (the "Warrant") to purchase shares of the Company's common stock, par
value $0.01 per share (the "Company's Common Stock"); 

        WHEREAS,
the December 2002 Investors and Shell Capital Inc. ("SCI") are parties to that certain Assignment Agreement, dated as of November 21, 2002 (the "Assignment Agreement"), whereby
the December 2002 Investors have purchased from SCI a note payable by Brigham Oil & Gas, L.P. in the principal amount of $10,000,000 (the "Note") that is convertible into 2,564,102 shares of the
Company's Common Stock; 

        WHEREAS,
the Company and the December 2002 Investors are parties to that certain Omnibus Agreement, dated as of December 20, 2002 (the "Omnibus Agreement"), whereby the December 2002
Investors have converted the Note into 2,564,102 shares of the Company's Common Stock; and 

        WHEREAS,
to induce the Investors to enter into the Warrant Certificates, the Securities Purchase Agreement, and the Omnibus Agreement, the Company has agreed to provide registration
rights with respect to the shares issuable upon exercise of the Warrants and upon conversion under the Omnibus Agreement; 

        NOW,
THEREFORE, for and in consideration of the foregoing, and other good and valuable consideration, the sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, do hereby agree as follows: 

        1.    Amendments.

        (a)  The
"RECITALS" section of the Agreement is amended by deleting such section entirely and replacing it with the following: 

"WHEREAS,
each of DLJMB Funding III, Inc. ("MB") and DLJ ESC II, L.P. ("ESC") (MB and ESC are sometimes referred to collectively as the "November 2000 Investors") is a party to a certain Warrant
Certificate (the "November 2000 Warrant Certificates"), dated as of November 1, 2000, by and between the Company and such investor; 

WHEREAS,
each of the November 2000 Investors, DLJ Merchant Banking Partners III, L.P. ("MBP") and DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III,
C.V. ("DOP") (the November 2000 Investors, MBP and DOP are sometimes referred to collectively as the "March 2001 Investors") is a party to a certain Warrant Certificate (the "March 2001 Warrant
Certificates"), dated as of March 5, 2001, by and between the Company and such investor; 

WHEREAS,
each of MBP; DOP; DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-1, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as
Associate General Partner of DLJ Offshore Partners III-1, C.V. ("DOP-1"); DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-2, C.V. and as attorney-
in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-2, C.V. ("DOP-2"); DLJ MB Partners III GmbH & Co. KG ("MBP GmbH"); Millennium Partners II, L.P.
("MPII"); and MBP III Plan Investors, L.P. ("MPIII") (MBP, DOP, DOP-1, DOP-2, MBP GmbH, MPII and MPIII are sometimes referred to collectively as the "December 2002 Investors," and together with the
November 2000 Investors and the March 2001 Investors, the "Investors") is a party to a certain Warrant Certificate (the "December 2002 Warrant Certificates," and together with the
November 2000 Warrant Certificates and the March 2001 Warrant Certificates, the "Warrant Certificates"), dated as of December 20, 2002, by and between the Company and such investor; 

2

 

WHEREAS,
the November 2000 Warrant Certificates were executed and delivered to the November 2000 Investors in connection with the consummation of transactions contemplated by that certain Securities
Purchase Agreement, dated as of November 1, 2000, by and among the Company and the November 2000 Investors; 

WHEREAS,
the March 2001 Warrant Certificates were executed and delivered in connection with the consummation of transactions contemplated by that certain Securities Purchase Agreement, dated as of
March 5, 2001, by and among the Company and the March 2001 Investors; 

WHEREAS,
the December 2002 Warrant Certificates were executed and delivered in connection with the consummation of transactions contemplated by that certain Securities Purchase Agreement, dated
December 20, 2002, by and among the Company and the December 2002 Investors; 

WHEREAS,
pursuant to the Warrant Certificates, each Holder (as defined in the Agreement) has been issued a warrant (the "Warrant") to purchase shares of the Company's common stock, par value $0.01 per
share (the "Company's Common Stock"); 

WHEREAS,
the December 2002 Investors and Shell Capital Inc. ("SCI") are parties to that certain Assignment Agreement, dated as of November 21, 2002 (the "Assignment Agreement"), whereby the December
2002 Investors have purchased from SCI a note payable by Brigham Oil & Gas, L.P. in the principal amount of $10,000,000 (the "Note") that is convertible into 2,564,102 shares of the Company's Common
Stock; 

WHEREAS,
the Company and the December 2002 Investors are parties to that certain Omnibus Agreement, dated as of December 20, 2002 (the "Omnibus Agreement"), whereby the December 2002 Investors have
converted the Note into 2,564,102 shares of the Company's Common Stock; and 

WHEREAS,
to induce the Investors to enter into the Warrant Certificates, the Securities Purchase Agreement, and the Omnibus Agreement, the Company has agreed to provide registration rights with
respect to the shares issuable upon exercise of the Warrants and upon conversion under the Omnibus Agreement;" 

        (b)  The
definition of Registrable Securities in Section 1(d) of the Agreement is amended by deleting such Section 1(d) entirely and replacing it with the following: 

"(d)
"Registrable Securities" means (i) the Common Stock of the Company issued upon exercise of the Warrants or issuable in connection with the future exercise of the Warrants; (ii) the Common Stock
of the Company issued in connection with the Omnibus Agreement; and (iii) any Common Stock of the Company issued as (or issuable upon the conversion or exercise of any warrant, right or other security
which is issued as) a dividend or other distribution with respect to, or in exchange for or in replacement of, such Warrants or Common Stock, excluding in all cases, however, any Registrable
Securities sold by a person in a transaction in which its rights under this Agreement are not assigned;" 

        (c)  Section
2(a) of the Agreement is amended by deleting such Section 2(a) entirely and replacing it with the following: 

"(a)
If the Company shall receive a written request from the Holders of at least 25% of the Registrable Securities then outstanding (the "Initiating Holders") that the Company file a registration
statement under the Act covering the registration of at least 25% of the Registrable Securities, then the Company shall (i) within 10 days after the receipt of such request, give written notice of
such request to all Holders; (ii) subject to the limitations set forth below, file with the SEC a registration statement within 60 days after the receipt of such 

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request, which registration statement shall cover all Registrable Securities that the Holders request to be registered within 30 days of receipt of the Company's notice; and (iii) use its best
efforts to cause such registration statement to be declared effective on or prior to 120 days following the registration request." 

        (d)  Section
2(b) of the Agreement is amended by deleting such Section 2(b) entirely and replacing it with the following: 

"(b)
The Company is obligated to effect only three registrations pursuant to this Section 2." 

        (e)  Section
4(a) of the Agreement is amended by deleting such Section 4 entirely and replacing it with the following: 

"(a)
If the Company shall receive a written request from the Holders of at least 25% of the Registrable Securities then outstanding that the Company effect a registration on Form S-3 and the
reasonably anticipated aggregate offering price to the public would equal or exceed $2,000,000, then the Company
shall (i) within 10 days after the receipt of such request, give written notice of such request to all Holders; (ii) subject to the limitations set forth below, file with the SEC a Form S-3 within 60
days after the receipt of such request, which Form S-3 shall cover all Registrable Securities that the Holders request to be registered within 30 days of receipt of the Company's notice; and (iii) use
its best efforts to cause such Form S-3 to be declared effective on or prior to 120 days following the registration request." 

        (f)    Section
5(a) of the Agreement is amended by deleting such Section 5(a) entirely and replacing it with the following: 

"(a)
Prepare and file with the SEC a registration statement with respect to such Registrable Securities and use its commercially reasonable efforts to cause such registration statement to be declared
effective and, upon the request of the Holders of 25% of the Registrable Securities registered thereunder, keep such registration statement continuously effective until the earlier of one year or
until the first date when all Registrable Securities covered by a registration statement shall have been sold or otherwise disposed of by the Holders whether pursuant to a registration statement or
otherwise;" 

        (g)  Section
8(a) of the Agreement is amended by deleting such Section 8(a) entirely and replacing it with the following: 

"(a)
The Holders requesting registration under Section 2 must distribute the Registrable Securities covered by their request by means of a public offering. Simultaneously with making the request for
registration under Section 2(a), the Initiating Holders shall provide the Company with the names of one or more reputable national or regional underwriters who have indicated a willingness to
underwrite the offering, and the Company shall use its best efforts to enter into an underwriting agreement in customary form and reasonably acceptable to the Holders with one or more of such
underwriters. Any failure of the Initiating Holders to provide underwriter information to the Company, or any failure by such underwriter(s) to proceed with the offering on customary terms, shall
relieve the Company of its obligation to file such registration statement within 60 days after receipt of the registration request, though the Company shall still be obligated to use its reasonable
best efforts to effect the registration as soon as practicable using such alternative underwriters as shall be identified by the Initiating Holders and reasonably acceptable to the Company. The right
of any Ho lder to include its Registrable Securities in such registration under Section 2 shall be conditioned upon such Holder's participation in such underwriting and the inclusion of such Holder's
Registrable Securities in the underwriting to the extent provided herein. All Holders proposing to distribute their Registrable Securities through such underwriting shall (together with the Company as
provided in Section 5(e)) enter into an underwriting agreement in customary 

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form with the underwriter or underwriters selected for such underwriting by a majority in interest of the Initiating Holders. Notwithstanding any other provision of Section 2, if the underwriter
advises the Initiating Holders in writing that marketing factors require a limitation of the number of shares to be underwritten, then the Initiating Holders shall so advise all Holders of Registrable
Securities which would otherwise have been underwritten pursuant to Section 2, and the number of shares of Registrable Securities that may be included in the registration shall be apportioned first
pro rata among
the selling Holders, including the Initiating Holders, according to the total amount of Registrable Securities requested to be sold in such registration by such Holders, then to the Company and then
pro rata among any other selling stockholders according to the total amount of securities otherwise entitled to be included therein owned by each such selling stockholder, or in such other proportions
as shall mutually be agreed to by such selling stockholders." 

        (h)  Schedule
A to the Agreement is amended by deleting such Schedule A entirely and replacing it with Schedule A to this Amendment. 

        2.    No Other Changes.    Except as explicitly amended by this Amendment, the terms, conditions, rights and
obligations under the Agreement shall remain in full force and effect. 

        3.    Counterparts.    This Amendment may be executed by the parties hereto in any number of counterparts, each of
which shall be deemed an original, but all of which shall constitute one and the same agreement. 

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        IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date set forth above. 

	
BRIGHAM EXPLORATION COMPANY	
 	

 
	

By:	

/s/  DAVID T. BRIGHAM        
	
 	

 
	Name:	David T. Brigham
	 	 
	Title:	Executive Vice President—Land and Administration
	 	 
	

Address:

Brigham Exploration Company

6300 Bridge Point Parkway

Building 2, Suite 500

Austin, TX 78730

Attention: Chief Financial Officer

Fax: 512-427-3400	
 	

 
	
DLJ MB FUNDING III, INC.	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
DLJ ESC II, LP	
 	

 
	

By: DLJ LBO PLANS MANAGEMENT CORPORATION,

its general partner
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
DLJ MERCHANT BANKING PARTNERS III, L.P.
	

By:	

DLJ MERCHANT BANKING III, INC.,

its Managing General Partner	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 

	DLJ MERCHANT BANKING III, INC., AS ADVISORY

GENERAL PARTNER ON BEHALF OF

DLJ OFFSHORE PARTNERS III, C.V.	 	 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
DLJ MERCHANT BANKING III, INC.,

AS ADVISORY GENERAL PARTNER ON BEHALF OF

DLJ OFFSHORE PARTNERS III-1, C.V. AND AS

ATTORNEY-IN-FACT FOR DLJ MERCHANT BANKING III, L.P.,

AS ASSOCIATE GENERAL PARTNER OF

DLJ OFFSHORE PARTNERS III-1, C.V.
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
DLJ MERCHANT BANKING III, INC., AS ADVISORY

GENERAL PARTNER ON BEHALF OF

DLJ OFFSHORE PARTNERS III-2, C.V. AND

AS ATTORNEY-IN-FACT FOR DLJ MERCHANT BANKING III, L.P.,

AS ASSOCIATE GENERAL PARTNER OF

DLJ OFFSHORE PARTNERS III-2, C.V.
	

 	

By:	

  
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
DLJ MB PARTNERS III GmbH & CO. KG	
 	

 
	

By: DLJ MERCHANT BANKING III, L.P.,

its Managing Limited Partner
	

 	

By:	

DLJ MERCHANT BANKING III, INC.,

its General Partner	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 

	MILLENNIUM PARTNERS II, L.P.	 	 
	By: DLJ MERCHANT BANKING III, INC.,

its Managing General Partner
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
MBP III PLAN INVESTORS, L.P.	
 	

 
	By: DLJ LBO PLANS MANAGEMENT CORPORATION,

its Managing General Partner	 	 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	
ADDRESSES FOR NOTICES TO CSFB ENTITIES:
	

Global Energy Partners

1100 Louisiana Street

Houston, Texas 77002

Fax: 713-890-1429

Attn: Steven A. Webster
	

and
	

CSFB Private Equity

11 Madison Avenue

New York, New York 10010

Fax: 212-448-3502

Attn: Dorian S. Forshner

 
 

Schedule A
  to Registration Rights Agreement    
  

	 
	 	Number of Shares

	Holder Name
 
	 	November 1,

2000
	 	March 5,

2001
	 	December 20,

2002

	DLJ Merchant Banking Partners III, L.P.	 	4,681,393	 	1,478,337	 	1,657,241
	

DLJ MB Funding III, Inc	
 	

125,748	
 	

39,709	
 	

-0-
	

DLJ ESC II, LP	
 	

1,409,326	
 	

445,048	
 	

-0-
	

DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III, C.V.	
 	

255,680	
 	

80,741	
 	

90,262
	

DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-1, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-1, C.V.	
 	

85,360	
 	

26,956	
 	

30,211
	

DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-2, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-2, C.V.	
 	

60,807	
 	

19,200	
 	

21,522
	

DLJ MB Partners III GmbH & Co. KG	
 	

40,340	
 	

12,741	
 	

14,280
	

Millennium Partners II, L.P.	
 	

8,013	
 	

2,531	
 	

2,878
	

MBP III Plan Investors, L.P.	
 	

-0-	
 	

-0-	
 	

482,456
	

Total	
 	

6,666,667	
 	

2,105,263	
 	

2,298,850

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Exhibit 10.51

SECOND AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

RECITALS

Schedule A to Registration Rights AgreementQuickLinks
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Exhibit 10.52    
  

 
 

BRIGHAM EXPLORATION COMPANY
  Stockholders Voting Agreement

        This
STOCKHOLDERS VOTING AGREEMENT, dated December 20, 2002 (this "Agreement"), is made and entered into by and among Brigham Exploration Company, a Delaware corporation (the
"Company"), the Credit Suisse First Boston entities listed on Schedule A hereto (the "CSFB Investors"), and the following stockholders of the Company (the "Stockholders"): Ben M. and Anne L.
Brigham, individual residents of Travis County, Texas, Harold D. Carter, a resident of Dallas County, Texas, General Atlantic Partners III, L.P., a Delaware limited partnership,
GAP-Brigham Partners, L.P., a Delaware limited partnership, GAP Coinvestment Partners II, L.P., a Delaware limited partnership, Aspect Resources, LLC, a Colorado limited liability company,
and the individual officers of the Company listed on Schedule I hereto. 

 
 

W I T N E S S E T H:    
  

        WHEREAS, the Company and the CSFB Investors propose to enter into a Securities Purchase Agreement concurrently with the execution hereof (the "Purchase
Agreement"), pursuant to which the Company will issue and sell to the CSFB Investors an aggregate of up to 500,000 shares of its Series B Preferred Stock and warrants (the "Warrants") to
acquire 2,298,850 shares (the "Warrant Shares") of its common stock (the "Common Stock"); 

        WHEREAS,
the Warrants contain certain anti-dilution provisions which, under the Nasdaq Market Rules, may not be enforceable until approved by the company's stockholders; 

        WHEREAS,
the Company has agreed to seek such approval at its annual stockholders' meeting to be held on or before May 31, 2003; and 

        WHEREAS,
as a condition to the agreement of the CSFB Investors to enter into the Purchase Agreement, the Company and the Stockholders have agreed to enter into this Agreement to provide
for certain agreements relating to approval of the terms of the Warrants thereof; 

        NOW,
THEREFORE, in consideration of the foregoing and the mutual agreements set forth herein, the parties to this Agreement hereby agree as follows: 

        1.    Agreement to Vote Shares.    Each Stockholder agrees that, at any special or annual meeting of stockholders of
the Company, such Stockholder shall vote all shares of Common Stock registered in its, his or her name or beneficially owned by it, him or her as of the record date of the meeting at which the matter
is considered (including without limitation any and all other capital stock of the Company legally or beneficially acquired by such Stockholder after the date hereof) to approve and ratify the
Warrants and any future adjustments to the exercise price pursuant to the terms of the Warrants. Each Stockholder represents to the CSFB Investors that as of the date hereof such Stockholder owns the
number of outstanding shares of Common Stock set forth opposite such Stockholder's name on the attached Schedule I. 

        2.    Successors, Assigns and Transferees.    The terms and provisions of this Agreement shall not bind, inure to the
benefit of or be enforceable by or against the successors, assigns or transferees of each of the parties hereto. No party hereto may assign its rights under this Agreement. 

        3.    Entire Agreement; Amendments.    This Agreement, and such additional instruments as may be concurrently executed
and delivered pursuant to this Agreement, constitutes the entire understanding of the parties with respect to its subject matter. There are no restrictions, agreements, promises, representations,
warranties, covenants or undertakings other than those expressly set forth herein or in 

1

 

the documents delivered concurrently herewith. This Agreement may be amended only by a written instrument duly executed by all the parties hereto. 

        4.    Headings.    The section headings contained in this Agreement are for reference purposes only and shall not
effect in any way the meaning or interpretation of this Agreement. 

        5.    Notices.    All notices, requests, claims, demands and other communications hereunder shall be in writing and
shall be given (and shall be deemed to have been duly given if so given) by hand delivery, facsimile or by mail (registered or certified, postage prepaid, return receipt requested) to the respective
parties as follows: 

If
to Brigham: 

Brigham
Exploration Company

6300 Bridge Point Parkway

Building Two, Suite 500

Austin, Texas 78730

Attention: Ben M. "Bud" Brigham

Fax No: (512) 427-3400 

If
to any of the CSFB Investors: 

Global
Energy Partners

1100 Louisiana Street

Houston, Texas 77002

Fax: 713-890-1429

Attn: Steven A. Webster 

and

CSFB
Private Equity

11 Madison Avenue

New York, New York 10010

Fax: 917-326-8076

Attn: Ivy Dodes 

with
a copy to: 

Gardere
Wynne Sewell LLP

1000 Louisiana, Suite 3400

Houston, Texas 77002

Attention: N.L. Stevens III

Telefax: 713-276-5807 

If
to Ben M. Brigham: 

Ben
M. Brigham

Brigham Exploration Company

6300 Bridge Point Parkway

Building Two, Suite 500

Austin, Texas 78730

Fax No: (512) 427-3400 

If
to Anne L. Brigham: 

Anne
L. Brigham

Brigham Exploration Company

6300 Bridge Point Parkway

2

 

Building Two, Suite 500

Austin, Texas 78730

Fax No: (512) 427-3400 

If
to Harold D. Carter: 

Harold
D. Carter

5949 Sherry Lane, Suite 620

Dallas, Texas 75225

Fax No.: (214) 692-7820 

If
to General Atlantic Partners III, L.P.: 

General
Atlantic Partners III, L.P.

c/o General Atlantic Service Corporation

3 Pickwick Plaza

Greenwich, CT 06830

Attention: Mr. Thomas J. Murphy

Fax No: (203) 622-8818 

If
to GAP-Brigham Partners, L.P.: 

GAP-Brigham
Partners, L.P.

c/o General Atlantic Service Corporation

3 Pickwick Plaza

Greenwich, CT 06830

Attention: Mr. Thomas J. Murphy

Fax No: (203) 622-8818 

If
to GAP Coinvestment Partners II, L.P.: 

GAP
Coinvestment Partners II, L.P.

c/o General Atlantic Service Corporation

3 Pickwick Plaza

Greenwich, CT 06830

Attention: Mr. Thomas J. Murphy

Fax No: (203) 622-8818 

If
to Aspect Resources, LLC: 

Aspect
Resources, LLC

511 16th Street, Suite 300

Denver, CO 80202

Attention: Mr. Paul D. Favret

Fax No: (303) 573-7340 

If
to any of the officers of Brigham: 

Brigham
Exploration Company

6300 Bridge Point Parkway

Building Two, Suite 500

Austin, Texas 78730

Attention: [name of officer]

Fax No: (512) 427-3400 

or
to such other address as the person to whom notice is given may have previously furnished to the others in writing in the manner set forth above. 

        6.    Governing Law.    This Agreement shall be governed by and construed and enforced in accordance with the laws of
the State of Delaware, without reference to the conflict of laws principles thereof. 

3

 

        7.    Waiver.    Any waiver by any party of a breach of any provision of this Agreement shall not operate as or be
construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Agreement. The failure of a party to insist upon strict adherence to any term of this
Agreement on one or more occasions shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Agreement. 

        8.    Challenges to Agreement.    In the event that any part of this Agreement or any transaction contemplated hereby
is temporarily, preliminarily or permanently enjoined or restrained by court of competent jurisdiction, the parties hereto shall use their reasonable best efforts to cause any such injunction or
restraining order to be vacated or dissolved or otherwise declared or determined to be of no further force or effect. 

        9.    Specific Performance.    Each of the Stockholders acknowledges and agrees that irreparable harm would occur if
any provision of this Agreement were not performed in accordance with the terms thereof, or were otherwise breached, and that such harm could not be remedied by an award of damages. Accordingly, each
of the Stockholders agrees that any non-breaching party shall be entitled to an injunction to prevent breaches of this Agreement and to enforce specifically the terms and provisions
hereof. 

        10.    Counterparts.    This Agreement may be executed in counterparts, each of which shall be an original, but each
of which together shall constitute one and the same Agreement. 

        *
* * * * 

4

 

        IN
WITNESS WHEREOF, and intending to be legally bound hereby, each of the undersigned parties has executed or caused this Agreement to be executed on the date first above written. 

	

 	
 	

BRIGHAM EXPLORATION COMPANY
	

 	
 	

By:/s/  BEN M. BRIGHAM      

	 	 	Name: Ben M. Brigham

	 	 	Title: CEO and President

	

 	
 	

/s/  BEN M. BRIGHAM      
 Ben M. Brigham
	

 	
 	

/s/  ANNE L. BRIGHAM      
 Anne L. Brigham
	

 	
 	

/s/  HAROLD D. CARTER      
 Harold D. Carter
	

 	
 	

/s/  EUGENE B. SHEPHERD      
 Eugene B. Shepherd
	

 	
 	

/s/  DAVID T. BRIGHAM      
 David T. Brigham
	

 	
 	

/s/  A. LANCE LANGFORD      
 A. Lance Langford
	

 	
 	

/s/  JEFFERY E. LARSON      
 Jeffery E. Larson
	

 	
 	

/s/  MALCOLM BROWN      
 Malcolm Brown
	

 	
 	

/s/  WARREN LUDLOW      
 Warren Ludlow
	

 	
 	

GENERAL ATLANTIC PARTNERS III, L.P.

By GAP III Investors, Inc.

Its General Partner
	

 	
 	

By:
	 	 	/s/  STEPHEN P. REYNOLDS      
 Name: Stephen P. Reynolds

Title: President

5

 

	

 	
 	

GAP-BRIGHAM PARTNERS, L.P.
	 	 	By:
	 	 	/s/  STEPHEN P. REYNOLDS      
 Name: Stephen P. Reynolds

Title: General Partner
	 	 	GAP COINVESTMENT PARTNERS II, L.P.
	

 	
 	

By:

/s/  THOMAS J. MURPHY      

	 	 	Name: Thomas J. Murphy
 Title: General Partner
	

 	
 	

ASPECT RESOURCES, LLC

By Aspect Management Corporation

Its Manager
	

 	
 	

By:

/s/  SCOTT RITGER      

	 	 	Name: Scott Ritger
Title: Manager

	

THE CSFB INVESTORS:	
 	

 
	

DLJ MERCHANT BANKING PARTNERS III, L.P.
	

By: DLJ MERCHANT BANKING III, INC.,

its Managing General Partner	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	

DLJ MERCHANT BANKING III, INC., AS ADVISORY

GENERAL PARTNER ON BEHALF OF

DLJ OFFSHORE PARTNERS III, C.V.
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	

DLJ MERCHANT BANKING III, INC., AS ADVISORY

GENERAL PARTNER ON BEHALF OF DLJ OFFSHORE

PARTNERS III-1, C.V. AND AS ATTORNEY-IN-FACT FOR

DLJ MERCHANT BANKING III, L.P., AS ASSOCIATE

GENERAL PARTNER OF DLJ OFFSHORE PARTNERS III-1, C.V.
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 

6

 

	DLJ MERCHANT BANKING III, INC., AS ADVISORY

GENERAL PARTNER ON BEHALF OF

DLJ OFFSHORE PARTNERS III-2, C.V. AND

AS ATTORNEY-IN-FACT FOR DLJ MERCHANT BANKING III, L.P.,

AS ASSOCIATE GENERAL PARTNER OF

DLJ OFFSHORE PARTNERS III-2, C.V.
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	

DLJ MB PARTNERS III GmbH & CO. KG	
 	

 
	By: DLJ MERCHANT BANKING III, L.P.,

its Managing Limited Partner	 	 
	

 	

By:	

DLJ MERCHANT BANKING III, INC.,

its General Partner
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	

MILLENNIUM PARTNERS II, L.P.	
 	

 
	

By: DLJ MERCHANT BANKING III, INC.,

its Managing General Partner	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 
	

MBP III PLAN INVESTORS, L.P.	
 	

 
	

By: DLJ LBO PLANS MANAGEMENT CORPORATION,

its Managing General Partner	
 	

 
	

 	

By:	

/s/  ROBERT CABES        
      ROBERT CABES

      Attorney-in-Fact	
 	

 

7

 
 
 

Schedule I    

	Stockholder
 
	 	Number of Outstanding

Shares of Common Stock

	Ben M. and Anne L. Brigham, collectively	 	3,671,774
	Harold D. Carter	 	314,893
	General Atlantic Partners III, L.P.	 	2,679,418
	GAP-Brigham Partners, L.P.	 	127,725
	GAP Coinvestment Partners II, L.P.	 	975,610
	Aspect Resources, LLC	 	487,805
	Brigham Officers:

Eugene B. Shepherd

David T. Brigham

Lance Langford

Jeffery E. Larson

Malcolm Brown

Warren Ludlow	 	193,252 (in the aggregate)

8

QuickLinks

Exhibit 10.52

BRIGHAM EXPLORATION COMPANY Stockholders Voting Agreement

W I T N E S S E T H

Schedule I

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