<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
(Amendment No. 6)*
Under the Securities Exchange Act of 1934
TERRA NITROGEN COMPANY, L.P.
________________________________________________________________________________
(Name of Issuer)
Common Units of Limited Partnership Interests
________________________________________________________________________________
(Title of Class of Securities)
881005 20 1
_______________________________________________________________
(CUSIP Number)
George H. Valentine N. Jordan
Corporate Secretary Secretary
Terra Industries Inc. Anglo American plc
Terra Centre 20 Carlton House Terrace
600 Fourth Street London SW1Y 5AN
Sioux City, Iowa 51102-6000 United Kingdom
(712) 277-1340 (171) 698-8888
________________________________________________________________________________
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
Communications)
July 30, 1999
_______________________________________________________________
(Date of Event which Requires Filing of this Statement)
If person has previously filed a statement on Schedule 13G to report the
acquisition which is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].
Check the following box if a fee is being paid with the statement [_].
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 2 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Terra Nitrogen Corporation
EIN: 72-1159610
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
11,172,414 (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
11,172,414 (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
11,172,414 (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
60.4% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 3 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Terra Capital, Inc. (Due to direct ownership of 1,992,800 Common Units
and solely due to indirect ownership of 11,172,414 Common Units through
its wholly owned subsidiary, Terra Nitrogen Corporation) EIN: 42-1431650
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 4 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Terra Capital Holdings, Inc. (Solely due to indirect ownership through
its wholly owned subsidiary, Terra Capital, Inc.) EIN: 42-1431905
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 5 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Terra Industries, Inc. (Solely due to indirect ownership through
its wholly owned subsidiary, Terra Capital Holdings, Inc.) EIN: 52-1145429
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Maryland
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 6 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Taurus Investments S.A. -- Solely due to indirect ownership through
its ownership of over 5% of the common stock of Terra Industries Inc.
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Luxembourg
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 7 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Taurus International S.A. -- Solely due to indirect ownership through
its ownership of over 50% of the common stock of Terra Industries Inc.
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
Luxembourg
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
SCHEDULE 13D
- ----------------------- ---------------------
CUSIP NO. 881005 20 1 PAGE 8 OF 11 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Anglo American plc -- Solely due to indirect ownership through its wholly
owned subsidiary. Taurus International S.A. (and its wholly owned
subsidiary Taurus Investments S.A.)
------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [X]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
SOURCE OF FUNDS*
4
OO
- ------------------------------------------------------------------------------
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
TO ITEMS 2(d) or 2(e) [_]
5
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
6
United Kingdom
- ------------------------------------------------------------------------------
SOLE VOTING POWER
7
NUMBER OF -0-
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 8
13,165,214 Common Units (See Item 5)
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
9
REPORTING -0-
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 10
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
13,165,214 Common Units (See Item 5)
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
71.2% (See Item 5)
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
14
CO
- ------------------------------------------------------------------------------
<PAGE>
Item 1. Security and Issuer.
-------------------
This Amendment No. 6 amends the Schedule 13D dated March 31, 1997 (as
amended by Amendments Nos. 1 through 5, the "Schedule 13D") of the Reporting
Persons relating to Common Units of limited partnership interests (the "Common
Units") of Terra Nitrogen Company, L.P., a Delaware limited partnership
("TNCLP"). The principal executive offices of TNCLP are at 600 Fourth Street,
Sioux City, Iowa 51101.
Item 2. Identity and Background
-----------------------
Item 2 and Annex A are hereby amended to delete the reference to
Anthony W. Lea as a Director of Terra Industries Inc. in Section IV of Annex A,
to transfer the balance of such information concerning Mr. Lea from Section IV
to Section V of Annex A and to add the following Director of Terra to Section IV
of Annex A:
Name: Thomas H. Claiborne (Director)
Citizenship: United States of America
Business Address: 20 Carlton House Terrace
London, United Kingdom
Principal Occupation: Vice President Administration
Item 2 and Annex A are hereby further amended to delete all
information concerning Sir A. Rankin from Section V of Annex A.
Item 3. Source and Amount of Funds or Other Consideration.
-------------------------------------------------
Item 3 is hereby amended by insertion of the following additional
sentence at the end of the second paragraph: "The amount of funds expended for
the purchases between July 1, 1999 and July 30, 1999 totaled $1.8 million."
Item 4. Purpose of Transaction.
----------------------
Item 4 is hereby amended by the insertion of the following additional
sentence after the fourth sentence of the second paragraph: "Terra Capital
further purchased 182,400 Common Units between July 1, 1999 and July 30, 1999
pursuant to the buyback authority."
Item 5. Interest in Securities of the Issuer.
------------------------------------
Item 5 is hereby amended by deleting the second and third sentences of
the first paragraph under section (a) and replacing them with the following
sentences: "Terra Capital is the direct beneficial owner of 1,992,800 Common
Units and, by virtue of its ownership of all the outstanding common stock of
TNC, may be deemed to possess indirect beneficial ownership of the Common Units
beneficially owned by TNC. Thus, Terra Capital's direct and indirect ownership
in the aggregate represents approximately 71.2% of the outstanding Common
Units."
Item 5 is hereby further amended by deleting the second sentence of
the first paragraph under section (b) and replacing it with the following
sentence: "Terra Capital has the power to vote or direct the vote and the power
to dispose of or direct the disposition of the 1,992,800 Common Units
beneficially owned by Terra Capital."
9
<PAGE>
Item 5 is hereby further amended by adding the following table under
section (c)(i) to read as follows:
<TABLE>
<CAPTION>
Purchase Date Number of Units Price per Unit
-------------------- --------------- --------------
<S> <C> <C>
07/01/99 10,000 $9.8169
07/02/99 4,000 $9.9297
07/06/99 4,000 $9.9375
07/07/99 4,000 $9.8125
07/08/99 4,000 $9.7500
07/09/99 4,200 $9.8661
07/12/99 10,800 $9.9282
07/13/99 1,100 $9.7500
07/14/99 700 $9.6875
07/15/99 3,800 $9.6875
07/16/99 9,800 $9.7258
07/19/99 40,600 $9.8624
07/22/99 3,700 $9.5338
07/23/99 3,700 $9.5000
07/26/99 39,200 $9.7857
07/27/99 3,200 $9.5469
07/28/99 1,500 $9.4750
07/29/99 900 $9.3750
07/30/99 33,200 $9.7726
Total (between 7/1/99 and 7/30/99) 182,400
Total (in 1999, through July 30) 385,400
</TABLE>
Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
to Securities of the Issuer.
---------------------------------------------------------------------
Not amended.
Item 7. Material to be Filed as Exhibits.
--------------------------------
Not amended.
10
<PAGE>
SIGNATURE
After reasonable inquiry and to the best of our knowledge and belief,
the undersigned certifies that the information set forth in this Statement is
true, complete and correct.
Date: August 9, 1999
TERRA NITROGEN CORPORATION
By /s/ George H. Valentine
------------------------------------
George H. Valentine
Its: Vice President and General Counsel
TERRA CAPITAL, INC.
By /s/ George H. Valentine
------------------------------------
George H. Valentine
Its: Vice President and Corporate Secretary
TERRA CAPITAL HOLDINGS, INC.
By /s/ George H. Valentine
------------------------------------
George H. Valentine
Its: Vice President and Corporate Secretary
TERRA INDUSTRIES INC.
By /s/ George H. Valentine
------------------------------------
George H. Valentine
Its: Senior Vice President, General Counsel and
Corporate Secretary
TAURUS INVESTMENTS S.A.
By /s/ David A. L. Bennett
------------------------------------
David A. L. Bennett
Its: Secretary
TAURUS INTERNATIONAL S.A.
By /s/ David A. L. Bennett
------------------------------------
David A. L. Bennett
Its: Secretary
ANGLO AMERICAN PLC
By /s/ Nick Jordan
------------------------------------
Nick Jordan
Its: Secretary
11
