QuickLinks -- Click here to rapidly navigate through this document



UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D. C. 20549

FORM 10-K10-K/A
AMENDMENT NO. 1


ý

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2003

OR

o

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 1-14569

PLAINS ALL AMERICAN PIPELINE, L.P.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

76-0582150
(I.R.S. Employer Identification No.)

333 Clay Street, Suite 1600
Houston, Texas 77002
(Address of principal executive offices)
(Zip Code)

(713) 646-4100
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class
 Name of each exchange on which registered
Common Units New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:    None

        Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes ý    No o

        Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act).    Yes ý    No o

        Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    o

        The aggregate value of the Common Units held by non-affiliates of the registrant (treating all executive officers and directors of the registrant and holders of 10% or more of the Common Units outstanding, for this purpose, as if they may be affiliates of the registrant) was approximately $1.1 billion on June 30, 2003, based on $31.48 per unit, the closing price of the Common Units as reported on the New York Stock Exchange on such date.

        At February 17, 2004, there were outstanding 57,162,638 Common Units and 1,307,190 Class B Common Units.

DOCUMENTS INCORPORATED BY REFERENCE:    None





PLAINS ALL AMERICAN PIPELINE, L.P.
FORM 10-K/A—2003 ANNUAL REPORT

Introductory Note

        Plains All American Pipeline, L.P. is filing this Amendment No. 1 on Form 10-K/A ("Amendment No. 1") to reflect certain revisions to disclosures previously included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2003, which was originally filed on March 1, 2004 (the "Original Filing"). The revisions to the Original Filing relate to a recently completed review of the Original Filing by the Securities and Exchange Commission's Division of Corporation Finance.

        The following Items of the Original Filing are amended by this Amendment No. 1:

Items 1 and 2.Business and Properties

Item 6.


Selected Financial and Operating Data

Item 7.


Management's Discussion and Analysis of Financial Condition and Results of Operations

Item 7A.


Quantitative and Qualitative Disclosures About Market Risks

Item 8.


Financial Statements and Supplementary Data

Item 10.


Directors and Executive Officers of our General Partner

Item 13.


Certain Relationships and Related Transactions

Item 15.


Exhibits, Financial Statement Schedules and Reports on Form 8-K

        Please note that the information contained in this Form 10-K/A, including the financial statements and notes thereto, do not reflect events occurring after the date of the Original Filing, except as reflected in "Note 16—Subsequent Events (Unaudited)" in the "Notes to the Consolidated Financial Statements." For a description of these events, please read Plains All American Pipeline, L.P.'s reports filed under the Exchange Act of 1934, as amended, since March 1, 2004.



PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES
2003 FORM 10-K10-K/A—2003 ANNUAL REPORT

Table of Contents

 
  
 Page
Part I

Items 1 and 2.

 

Business and Properties

 

1
Item 3. Legal Proceedings 37
Item 4. Submission of Matters to a Vote of Security Holders 37

Part II

Item 5.

 

Market for the Registrant's Common Units and Related Unitholder Matters

 

38
Item 6. Selected Financial and Operating Data 39
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations 42
Item 7A. Quantitative and Qualitative Disclosures About Market Risks 74
Item 8. Financial Statements and Supplementary Data 7776
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 77
Item 9A. Controls and Procedures 77

Part III

Item 10.

 

Directors and Executive Officers of Our General Partner

 

78
Item 11. Executive Compensation 85
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Unitholders' Matters 90
Item 13. Certain Relationships and Related Transactions 94
Item 14. Principal Accountant Fees and Services 98

Part IV

Item 15.

 

Exhibits, Financial Statement Schedules and Reports on Form 8-K

 

99


FORWARD-LOOKING STATEMENTS

        All statements, other than statements of historical fact, included in this report are forward-looking statements, including, but not limited to, statements identified by the words "anticipate," "believe," "estimate," "expect," "plan," "intend" and "forecast," and similar expressions and statements regarding our business strategy, plans and objectives of our management for future operations. These statements reflect our current views with respect to future events, based on what we believe are reasonable assumptions. Certain factors could cause actual results to differ materially from results anticipated in the forward-looking statements. These factors include, but are not limited to:

Other factors described herein, or factors that are unknown or unpredictable, could also have a material adverse effect on future results. Please read "Risk Factors Related to Our Business" discussed in Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operations." Except as required by applicable securities laws, we do not intend to update these forward-looking statements and information.




PART I

Items 1 and 2.    Business and Properties

General

        We are a publicly traded Delaware limited partnership (the "Partnership"), formed in 1998 and engaged in interstate and intrastate crude oil transportation, and crude oil gathering, marketing, terminalling and storage, as well as the marketing and storage of liquefied petroleum gas and other petroleum products, primarily in Texas, California, Oklahoma, Louisiana and the Canadian Provinces of Alberta and Saskatchewan. Our operations can be categorized into two primary business activities:

Business Strategy

        Our principal business strategy is to capitalize on the regional crude oil supply and demand imbalances that exist in the United States and Canada by combining the strategic location and distinctive capabilities of our transportation and terminalling assets with our extensive marketing and distribution expertise to generate sustainable earnings and cash flow.

        We intend to execute our business strategy by:

1



        To a lesser degree, we also engage in a similar business strategy with respect to the wholesale marketing and storage of LPG, which we began as a result of an acquisition in mid 2001. Since that time, the portion of our Gathering, Marketing, Terminalling and Storage Operations segment marginprofit associated with those activities has increased from $6.1$4.2 million in 2001 to $15.1$10.0 million in 2002 and $17.9$11.6 million in 2003. The segment marginprofit for 2001 reflects results from July 1 through December 31.

Financial Strategy

        We believe that a major factor in our continued success will be our ability to maintain a competitive cost of capital and access to the capital markets. Since our initial public offering in 1998, we have consistently communicated to the financial community our intention to maintain a strong credit profile that we believe is consistent with an investment grade credit rating. We have targeted a general credit profile with the following attributes:

        As of December 31, 2003, we were within our targeted credit profile. In order for us to maintain our targeted credit profile and achieve growth through acquisitions, we intend to fund acquisitions using approximately equal proportions of equity and debt. In certain cases, acquisitions will initially be financed using debt since it is difficult to predict the actual timing of accessing the market to raise equity. Accordingly, from time to time we may be temporarily outside the parameters of our targeted credit profile.

        In December 2003, Moody's Investors Service raised our senior unsecured rating to Ba1, affirmed our senior implied credit rating of Ba1 and placed us on review for a possible ratings upgrade. In November 2003, Standard & Poor's raised our senior unsecured rating to BBB- (the same rating as our senior implied rating) from BB+. You should note that a credit rating is not a recommendation to buy, sell or hold securities, and may be subject to revision or withdrawal at any time.

Competitive Strengths

        We believe that the following competitive strengths position us to successfully execute our principal business strategy:

2