Document:

First Supplemental Indenture

 EXHIBIT 4.3 
  
 FIRST SUPPLEMENTAL INDENTURE 
  
 Dated as of August 8, 2003 
  
 THIS FIRST SUPPLEMENTAL INDENTURE to the Indenture referred to below is dated as of August 8,
2003 and is made by and among AK STEEL CORPORATION, a Delaware corporation (“AK Steel”), AK STEEL HOLDING CORPORATION, a Delaware corporation (“AK
Holding”), DOUGLAS DYNAMICS, L.L.C., a Delaware limited liability company (“Douglas Dynamics”), AKS INVESTMENTS, INC., an Ohio corporation (“AKS”), AK
TUBE LLC, a Delaware limited liability company (“AK Tube” and, together with AKS, the “New Guarantors”), and FIFTH THIRD BANK, as trustee (the “Trustee”).

  
 AK Steel, AK Holding, Douglas Dynamics and the Trustee are
parties to an Indenture, dated as of June 11, 2002 (the “Indenture”). The Indenture relates to the 7-3/4% Senior Notes Due 2012 of AK Steel (the “Notes”). Except as otherwise defined herein, capitalized terms defined in the
Indenture are used herein as therein defined. 
  
 On July 24,
2003, AK Steel entered into a credit agreement (the “Credit Agreement”) with the lenders listed therein pursuant to which AK Holding, Douglas Dynamics and the New Guarantors agreed to act as guarantors of the obligations of AK Steel under
the Credit Agreement. Because the Credit Agreement constitutes a Permitted Credit Facility that is guaranteed by the New Guarantors, Section 10.4 of the Indenture requires the New Guarantors to unconditionally guarantee the obligations of AK Steel
under the Notes and the Indenture on the terms set forth in Article 10 of the Indenture. 
  
 Pursuant to Section 9.1 of the Indenture, AK Steel, AK Holding, Douglas Dynamics and the Trustee are permitted to amend the Indenture or the Notes without notice to or consent of any Holder to add guarantees with
respect to the Notes. 
  
 AK Steel has directed the Trustee to
execute and deliver this First Supplemental Indenture in accordance with the terms of the Indenture. 
  
 In consideration of the foregoing premises, the parties mutually agree as follows for the benefit of each other and for the equal and ratable benefit of
the Holders of the Notes: 
  
 ARTICLE I 
  
 ADDITION OF GUARANTORS 
  
 Section 1.1 Unconditional Senior Note Guarantee. Each of the New
Guarantors hereby jointly and severally with each of the Guarantors, unconditionally guarantees to each Holder of a Security authenticated and delivered by the Trustee, and to the Trustee on behalf of such Holder, the due and punctual payment and
performance of the Obligations (the “Senior Note Guarantee”) and further agrees to pay any and all expenses (including, without limitation, all fees and disbursements of counsel) that may be paid or incurred by the Trustee or the Holders
in enforcing their rights under the Senior Note Guarantee. In case of the failure of AK Steel punctually to perform or make any such payment, each New Guarantor hereby jointly and severally with each other Guarantor agrees to cause such payment and
performance to be made punctually. 

 Section 1.2. Guarantor Bound by Terms of Indenture. In accordance with Section 10.4 of the
Indenture, each of the New Guarantors hereby acknowledges and agrees that it is subject to the provisions (including, without limitation, the representations and warranties contained in Article 10 and Article 11 and the limitations set forth in
Section 10.2) of the Indenture as a Guarantor Subsidiary. 
  
 Section 1.3 Notification to Holders. AK Steel shall notify the Holders in accordance with Section 9.1 of the Indenture of the execution of this First Supplemental Indenture. Any failure of AK Steel to give such notice to all Holders,
or any defect therein, shall not impair or affect the validity of this First Supplemental Indenture. 
  
 Section 1.4 Receipt by Trustee. In accordance with Sections 9.6, 10.4 and 11.4 of the Indenture, the parties acknowledge that the Trustee has
received an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that this First Supplemental Indenture complies with the applicable requirements of the Indenture. 
  
 ARTICLE II 
  
 MISCELLANEOUS 
  
 Section 2.1 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, other than the Holders and the
Trustee, any legal or equitable right, remedy or claim under or in respect of this First Supplemental Indenture or the Indenture or any provision herein or therein contained. 
  
 Section 2.2 Governing Law. The rights and duties of AK Steel, AK Holding, Douglas Dynamics, the New Guarantors and
the Trustee under this First Supplemental Indenture shall, pursuant to New York General Obligations Law Section 5-1401, be governed by the laws of the State of New York. 
  
 Section 2.3 Separability Clause. In case any provision in this First Supplemental Indenture shall be invalid, illegal
or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
  
 Section 2.4 Ratification of Indenture; First Supplemental Indenture Part of Indenture. Except as expressly supplemented hereby, the Indenture is in
all respects ratified and confirmed and all the terms, conditions, and provisions thereof shall remain in full force and effect. This First Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes
heretofore or hereafter authenticated and delivered shall be bound hereby. The Trustee makes no representation or warranty as to the validity or sufficiency of this First Supplemental Indenture. 
  
 Section 2.5 Multiple Originals. The parties may sign any number of
copies of this First Supplemental Indenture. Each signed copy shall be an original, but all of them shall represent the same agreement. One signed copy is enough to prove this First Supplemental Indenture. 

 Section 2.6 Headings. The headings of the Articles and Sections of this First Supplemental
Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof. 
  
 IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be duly executed as of the date
first written above. 
  
  

	AK STEEL CORPORATION 
		
	 By:
	 	 /s/    James L. Wainscott
        

	 	 	 Name:   James L. Wainscott
 Title:
    Senior Vice President and
               Chief Financial
Officer

  
  

	 AK STEEL HOLDING CORPORATION, 
 as Guarantor

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name:   James L. Wainscott
 Title:
    Senior Vice President and
               Chief Financial
Officer

  
  

	 DOUGLAS DYNAMICS, L.L.C.,
 as Guarantor

		
	 By:
	 	 AK Steel Corporation, 
 as
Manager

  
  

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name:   James L. Wainscott
 Title:
    Senior Vice President and
               Chief Financial
Officer

	 AKS INVESTMENTS, INC.
 as Guarantor

		
	 By:
	 	 /s/    James L. Wainscott
        

	 	 	 Name:    James L. Wainscott
 Title:      Treasurer

  
  

	 AK TUBE LLC 
 as
Guarantor

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name:    James L. Wainscott
 Title:      Treasurer

  
  

	 FIFTH THIRD BANK,
 as Trustee

		
	 By:
	 	 /s/    Gregory R. Hahn         

	 	 	 Name:    Gregory R. Hahn
 Title:      Assistant Vice PresidentFourth Supplemental Indenture

 EXHIBIT 4.4 
  
 FOURTH SUPPLEMENTAL INDENTURE 
  
 Dated as of August 8, 2003 
  
 THIS FOURTH SUPPLEMENTAL INDENTURE to the Indenture referred to below is dated as of August 8, 2003 and is made by and among AK STEEL CORPORATION, a
Delaware corporation (“AK Steel”), AK STEEL HOLDING CORPORATION, a Delaware corporation (“AK Holding”), DOUGLAS DYNAMICS, L.L.C., a Delaware limited liability company (“Douglas Dynamics”), AKS INVESTMENTS, INC., an Ohio
corporation (“AKS”), AK TUBE LLC, a Delaware limited liability company (“AK Tube” and, together with AKS, the “New Guarantors”), and FIFTH THIRD BANK, as trustee (the “Trustee”). 
  
 AK Steel, AK Holding, Douglas Dynamics and the Trustee are parties to an
Indenture, dated as of February 10, 1999, as amended and supplemented by the First Supplemental Indenture, dated as of August 6, 1999, the Second Supplemental Indenture, dated as of October 1, 1999, and the Third Supplemental Indenture, dated as of
August 8, 2002 (as so amended and supplemented, the “Indenture”). The Indenture relates to the 7-7/8% Senior Notes Due 2009 of AK Steel (the “Notes”). Except as otherwise defined herein, capitalized terms defined in the Indenture
are used herein as therein defined. 
  
 On July 24, 2003, AK Steel
entered into a credit agreement (the “Credit Agreement”) with the lenders listed therein pursuant to which AK Holding, Douglas Dynamics and the New Guarantors agreed to act as guarantors of the obligations of AK Steel under the Credit
Agreement. Because the Credit Agreement constitutes a Permitted Credit Facility that is guaranteed by the New Guarantors, Section 10.4 of the Indenture requires the New Guarantors to unconditionally guarantee the obligations of AK Steel under the
Notes and the Indenture on the terms set forth in Article 10 of the Indenture. 
  
 Pursuant to Section 9.1 of the Indenture, AK Steel, AK Holding, Douglas Dynamics and the Trustee are permitted to amend the Indenture or the Notes without notice to or consent of any Holder to add guarantees with
respect to the Notes. 
  
 AK Steel has directed the Trustee to
execute and deliver this Fourth Supplemental Indenture in accordance with the terms of the Indenture. 
  
 In consideration of the foregoing premises, the parties mutually agree as follows for the benefit of each other and for the equal and ratable benefit of
the Holders of the Notes: 
  
 ARTICLE I 
  
 ADDITION OF GUARANTORS 
  
 Section 1.1 Unconditional Senior Note Guarantee. Each of the New
Guarantors hereby jointly and severally with each of the Guarantors, unconditionally guarantees to each Holder of a Security authenticated and delivered by the Trustee, and to the Trustee on behalf of such Holder, the due and punctual payment and
performance of the Obligations (the “Senior Note Guarantee”) and further agrees to pay any and all expenses (including, without limitation, all fees and disbursements of counsel) that may be paid or incurred by the Trustee or the Holders
in enforcing their rights under the Senior Note Guarantee. In case of the failure of AK Steel punctually to perform or make any such payment, each New Guarantor hereby jointly and severally with each other Guarantor agrees to cause such payment and
performance to be made punctually. 

 Section 1.2. Guarantor Bound by Terms of Indenture. In accordance with Section 10.4 of the
Indenture, each of the New Guarantors hereby acknowledges and agrees that it is subject to the provisions (including, without limitation, the representations and warranties contained in Article 10 and Article 11 and the limitations set forth in
Section 10.2) of the Indenture as a Guarantor Subsidiary. 
  
 Section 1.3 Notification to Holders. AK Steel shall notify the Holders in accordance with Section 9.1 of the Indenture of the execution of this Fourth Supplemental Indenture. Any failure of AK Steel to give such notice to all
Holders, or any defect therein, shall not impair or affect the validity of this Fourth Supplemental Indenture. 
  
 Section 1.4 Receipt by Trustee. In accordance with Sections 9.6, 10.4 and 11.4 of the Indenture, the parties acknowledge that the Trustee has
received an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that this Fourth Supplemental Indenture complies with the applicable requirements of the Indenture. 
  
 ARTICLE II 
  
 MISCELLANEOUS 
  
 Section 2.1 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, other than the Holders and the
Trustee, any legal or equitable right, remedy or claim under or in respect of this Fourth Supplemental Indenture or the Indenture or any provision herein or therein contained. 
  
 Section 2.2 Governing Law. The rights and duties of AK Steel, AK Holding, Douglas Dynamics, the New Guarantors and
the Trustee under this Fourth Supplemental Indenture shall, pursuant to New York General Obligations Law Section 5-1401, be governed by the laws of the State of New York. 
  
 Section 2.3 Separability Clause. In case any provision in this Fourth Supplemental Indenture shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
  
 Section 2.4 Ratification of Indenture; Fourth Supplemental Indenture Part of Indenture. Except as expressly supplemented hereby, the Indenture is
in all respects ratified and confirmed and all the terms, conditions, and provisions thereof shall remain in full force and effect. This Fourth Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes
heretofore or hereafter authenticated and delivered shall be bound hereby. The Trustee makes no representation or warranty as to the validity or sufficiency of this Fourth Supplemental Indenture. 
  
 Section 2.5 Multiple Originals. The parties may sign any number of
copies of this Fourth Supplemental Indenture. Each signed copy shall be an original, but all of them shall represent the same agreement. One signed copy is enough to prove this Fourth Supplemental Indenture. 
  
 Section 2.6 Headings. The headings of the Articles and Sections of
this Fourth Supplemental Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof. 
  
 IN WITNESS WHEREOF, the parties hereto have caused this Fourth Supplemental
Indenture to be duly executed as of the date first written above. 

	 AK STEEL CORPORATION

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name: James L. Wainscott
 Title: Senior Vice President and
           Chief Financial Officer

  

	AK STEEL HOLDING CORPORATION,
as Guarantor
		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name: James L. Wainscott
 Title: Senior Vice President and
     Chief Financial Officer

  

	DOUGLAS DYNAMICS, L.L.C.,
as Guarantor
	
	 By:   AK Steel Corporation,
as Manager

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name: James L. Wainscott
 Title: Senior Vice President and
     Chief Financial Officer

	AKS INVESTMENTS, INC.
as Guarantor
		
	 By:
	 	 /s/    James L. Wainscott
        

	 	 	 Name: James L. Wainscott
 Title: Treasurer

  

	 AK TUBE LLC
 as Guarantor

		
	 By:
	 	 /s/    James L. Wainscott        

	 	 	 Name: James L. Wainscott
 Title: Treasurer

  

	FIFTH THIRD BANK,
as Trustee
		
	 By:
	 	 /s/    Gregory R. Hahn        

	 	 	 Name: Gregory R. Hahn
 Title: Assistant Vice President

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