Document:

Exhibit 10.33

Exhibit 10.33

FIRST AMENDMENT

This FIRST AMENDMENT (“Amendment”) dated as of May 16, 2011 (the
“Effective Date”) is by and among Brigham Oil & Gas, L.P., a Delaware limited partnership
(the “Borrower”), Brigham Exploration Company, a Delaware corporation (“Brigham
Exploration”), Brigham Inc., a Nevada corporation (the “General Partner”, together with
Brigham Exploration, each a “Guarantor” and collectively the “Guarantors”, and
together with Brigham Exploration and the Borrower, each a “Credit Party” and collectively
the “Credit Parties”), the Lenders party hereto, and Bank of America, N.A., as
administrative agent for the Lenders (in such capacity, the “Administrative Agent”).

WHEREAS, the Borrower, the Guarantors, the lenders from time to time party thereto (the
“Lenders”), and the Administrative Agent are parties to the Fifth Amended and Restated
Credit Agreement, dated as of February 23, 2011 (the “Credit Agreement”);

WHEREAS, the parties hereto have agreed to make certain amendments to the Credit Agreement as
provided for herein, subject to the conditions herein;

NOW THEREFORE, in consideration of the premises and the mutual covenants,
representations and warranties contained herein, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as
follows:

AGREEMENT

Section 1. Defined Terms. Unless otherwise defined in this Amendment, each
capitalized term used in this Amendment has the meaning given such term in the Credit Agreement.

Section 2. Amendment to the Credit Agreement.

(a) Section 1.01 of the Credit Agreement is hereby amended by inserting the following
new definitions in their appropriate alphabetical order:

“2011 Permitted Senior Notes” means the Permitted Senior Notes issued
and sold during the period from the First Amendment Effective Date through the date
of the Borrowing Base redetermination provided for in Section 2.02(b) scheduled to
occur after the delivery of the Internal Engineering Report due October 1, 2011.

“First Amendment Effective Date” means May 16, 2011.

(b) Section 1.01 of the Credit Agreement is hereby amended by replacing the definition
of “Maximum Permitted Senior Note Amount” with the following definition:

“Maximum Permitted Senior Note Amount” means $300,000,000; provided
that in connection with the issuance of the 2011 Permitted Senior Notes
the Maximum Permitted Senior Note Amount shall automatically increase (up to but not
exceeding $600,000,000) by an amount equal to (i) the stated aggregate principal
amount of the 2011 Permitted Senior Notes issued minus (ii) the aggregate principal
amount of any Permitted Senior Notes redeemed, retired or purchased with the
proceeds from the sale or issuance of the 2011 Permitted Senior Notes.

 

 

 

Section 3. Conditions to Effectiveness. This Amendment shall become effective as of
the Effective Date when the Administrative Agent has received counterparts hereof duly executed by
the Borrower, each Guarantor, the Administrative Agent and the Majority Lenders.

Section 4. Representations and Warranties. Each Credit Party hereby represents and
warrants that after giving effect hereto:

(a) the representations and warranties of such Credit Party contained in the Loan Documents
are true and correct in all material respects on and as of the Effective Date, other than those
representations and warranties that expressly relate solely to a specific earlier date, which shall
remain correct as of such earlier date; and

(b) no Default or Event of Default has occurred and is continuing.

Section 5. Reaffirmation of Guaranty. Each Guarantor hereby ratifies, confirms, and
acknowledges that its obligations under the Credit Agreement are in full force and effect and that
each Guarantor continues to unconditionally and irrevocably, jointly and severally, guarantee the
full and punctual payment, when due, whether at stated maturity or earlier by acceleration or
otherwise, all of the Obligations (subject to the terms of Article VIII of the Credit Agreement),
as such Obligations may have been amended by this Amendment. Each Guarantor hereby acknowledges
that its execution and delivery of this Amendment does not indicate or establish an approval or
consent requirement by the Guarantors in connection with the execution and delivery of consents,
waivers or amendments to the Credit Agreement or any of the other Loan Documents.

Section 6. Effect of Amendment,

(a) The execution, delivery and effectiveness of this Amendment shall not, except as expressly
provided herein, operate as a waiver of any right, power or remedy of any Lender, the Issuing
Lender or the Administrative Agent under any of the Loan Documents, nor, except as expressly
provided herein, constitute a waiver or amendment of any provision of any of the Loan Documents.

(b) Upon and after the execution of this Amendment by each of the parties hereto, each
reference in the Credit Agreement to “this Agreement”, “hereunder”, “hereof” or words of like
import referring to the Credit Agreement, and each reference in the other Loan Documents to “the
Credit Agreement”, “thereunder”, “thereof” or words of like import referring to the Credit
Agreement, shall mean and be a reference to the Credit Agreement as modified hereby.

 

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(c) This Amendment is a Loan Document executed pursuant to the Credit Agreement and shall
(unless otherwise expressly indicated herein) be construed, administered and applied in accordance
with the terms and provisions thereof.

(d) Except as specifically modified above, the Credit Agreement and the other Loan Documents
are and shall continue to be in full force and effect and are hereby in all respects ratified and
confirmed.

Section 7. Governing Law. THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK AND THE APPLICABLE LAWS OF THE UNITED STATES OF AMERICA.

Section 8. Counterparts. This Amendment may be executed in any number of counterparts
and by different parties hereto in separate counterparts, each of which when so executed shall be
deemed to be an original and all of which taken together shall constitute one and the same
agreement. Transmission by facsimile of an executed counterpart of this Amendment, or of an
executed signature page of this Agreement, shall be deemed to constitute due and sufficient
delivery of such counterpart.

[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 delivered by their respective duly authorized officers to be effective as of the
Effective Date.

	 	 	 	 	 
	 	BORROWER:

BRIGHAM OIL & GAS, L.P.

 	 
	 	By:  	 Brigham, Inc., its general partner
 	 
	 	 	 
	 	By:  	                     /s/ Eugene B. Shepherd, Jr.
 	 
	 	 	Eugene B. Shepherd, Jr. 	 
	 	 	Executive Vice President and
Chief Financial Officer 	 
	 
	 	GUARANTORS:

BRIGHAM EXPLORATION COMPANY

 	 
	 	By:  	/s/ Eugene B. Shepherd, Jr.
 	 
	 	 	Eugene B. Shepherd, Jr. 	 
	 	 	Executive Vice President and
Chief Financial Officer 	 
	 
	 	BRIGHAM, INC.

 	 
	 	By:  	/s/ Eugene B. Shepherd, Jr.
 	 
	 	 	Eugene B. Shepherd, Jr. 	 
	 	 	Executive Vice President and
Chief Financial Officer 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	ADMINISTRATIVE AGENT:

BANK OF AMERICA, N.A.,

as Administrative Agent

 	 
	 	By:  	/s/ Jeffrey M. Rush
 	 
	 	 	Name:  	Jeffrey M. Rush 	 
	 	 	Title:  	Managing Director 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	LENDERS:

BANK OF AMERICA, N.A.

 	 
	 	By:  	/s/ Jeffrey H. Rathkamp
 	 
	 	 	Jeffrey H. Rathkamp 	 
	 	 	Managing Director 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	THE ROYAL BANK OF SCOTLAND plc

 	 
	 	By:  	/s/ Steve Ray
 	 
	 	 	Name:  	Steve Ray 	 
	 	 	Title:  	Director 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	BNP PARIBAS

 	 
	 	By:  	/s/ Richard Hawthorne
 	 
	 	 	Name:  	Richard Hawthorne 	 
	 	 	Title:  	Director 	 
	 	 	 
	 	By:  	                     /s/ Betsy Joche
 	 
	 	 	Name:  	Betsy Joche 	 
	 	 	Title:  	Director 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	NATIXIS

 	 
	 	By:  	/s/ Donovan C. Broussard
 	 
	 	 	Name:  	Donovan C. Broussard 	 
	 	 	Title:  	Managing Director 	 
	 	 	 
	 	By:  	                     /s/ Louis P. Laville, III
 	 
	 	 	Name:  	Louis P. Laville, III 	 
	 	 	Title:  	Managing Director 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	CAPITAL ONE, NATIONAL ASSOCIATION

 	 
	 	By:  	/s/ Peter Shen
 	 
	 	 	Name:  	Peter Shen 	 
	 	 	Title:  	Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH

 	 
	 	By:  	/s/ Mikhail Faybusovich
 	 
	 	 	Name:  	Mikhail Faybusovich 	 
	 	 	Title:  	Director 	 
	 	 	 
	 	By:  	                      /s/ Vipul Dhadda
 	 
	 	 	Name:  	Vipul Dhadda 	 
	 	 	Title:  	Associate 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	COMPASS BANK

 	 
	 	By:  	/s/ Spencer Stasney
 	 
	 	 	Name:  	Spencer Stasney 	 
	 	 	Title:  	Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	COMERICA BANK

 	 
	 	By:  	/s/ Justin Crawford
 	 
	 	 	Name:  	Justin Crawford 	 
	 	 	Title:  	Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	ROYAL BANK OF CANADA

 	 
	 	By:  	/s/ Jay Sartain
 	 
	 	 	Name:  	Jay Sartain 	 
	 	 	Title:  	Authorized Signatory 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	UNION BANK, N.A.

 	 
	 	By:  	/s/ Scott Gildea
 	 
	 	 	Name:  	Scott Gildea 	 
	 	 	Title:  	Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	U.S. BANK, NATIONAL ASSOCIATION

 	 
	 	By:  	/s/ John C. Lozano
 	 
	 	 	Name:  	John C. Lozano 	 
	 	 	Title:  	Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	BANK OF SCOTLAND PLC, NEW YORK BRANCH

 	 
	 	By:  	/s/ Julia R. Franklin
 	 
	 	 	Name:  	Julia R. Franklin 	 
	 	 	Title:  	Assistant Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	WELLS FARGO BANK, N.A.

 	 
	 	By:  	/s/ Scott Hodges
 	 
	 	 	Name:  	Scott Hodges 	 
	 	 	Title:  	Director & Senior Relationship Manager 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.

 

 

 

	 	 	 	 	 
	 	AMEGY BANK, NATIONAL ASSOCIATION

 	 
	 	By:  	/s/ Mark A. Serice
 	 
	 	 	Name:  	Mark A. Serice 	 
	 	 	Title:  	Senior Vice President 	 

Signature Page to First Amendment to Credit Agreement

Brigham Oil & Gas, L.P.Exhibit 10.1

Exhibit 10.1

FOURTH AMENDMENT TO

2007
EQUITY INCENTIVE PLAN

OF

ENDURANCE SPECIALTY HOLDINGS LTD.

WHEREAS, Endurance
Specialty Holdings Ltd. (the “Company”) desires to amend the 2007
Equity Incentive Plan (as amended and in effect, the “Plan”) of the
Company to state that the number of Share Bonuses and any other Incentive
Awards granted under the Plan that have no vesting requirements be limited to
5% of the total number of Ordinary Shares authorized for issuance under the
Plan (the “Plan Amendment”). Capitalized terms used herein but not
defined shall have the meaning set forth in the Plan.

NOW THEREFORE, the
Plan is hereby amended as follows:

	1.	 	The first paragraph of Section 6 of the Plan is hereby amended by
deleting it in its entirety and substituting the following in lieu thereof:

The
Administrator may grant Incentive Awards in such amounts and with such terms
and conditions as the Administrator shall determine in its discretion, subject
to the provisions of the Plan; provided, that (i) there shall be no minimum
vesting period for unconditional Share Bonuses, (ii) the minimum vesting
period for Incentive Awards granted to non-employee directors pursuant to
Section 7 of the Plan and for performance-based Incentive Awards shall be
one year, (iii) the vesting schedule for all other Incentive Awards under
the Plan shall be no faster than ratably over a three year period following the
date of grant and (iv) the number of Share Bonuses and any other Incentive
Awards granted under the Plan that have no vesting requirements shall be
limited to 5% of the total number of Ordinary Shares authorized for issuance
under the Plan.

	2.	 	The Plan Amendment shall be effective upon approval of the Board of
Directors at its meeting held on May 11, 2011.

	3.	 	Except herein above provided, the Plan is hereby ratified, confirmed and
approved in all respects.

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