QuickLinks -- Click here to rapidly navigate through this document

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): ~~August~~November 73, 2003

Horizon Organic Holding Corporation
(Exact name of registrant as specified in its charter)

Delaware	000-24337	84-1405007
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employee Identification No.)

6311 Horizon Lane, Longmont, Colorado		80503
(Address of principal executive offices)		(Zip Code)

Registrant's telephone number, including area code: (303) 530-2711

(Former name or former address, if changed since last report)

ITEM 12: Results of Operations and Financial Condition

On ~~August~~November 73, 2003, Horizon Organic Holding Corporation issued a press release regarding its financial results for its ~~second~~third quarter ended ~~June~~ September 30, 2003. A copy of the press release is attached as Exhibit 99.1 to this report.

EXHIBITS

Exhibit Number		Description of Document
99.1		Press release dated ~~August~~November 73, 2003

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	HORIZON ORANIC HOLDING CORPORATION
Date: August 7, 2003	By:	/s/ THOMAS P. BRIGGS Thomas P. Briggs, Chief Financial Officer
Date: November 3, 2003	By:	/s/ THOMAS P. BRIGGS Thomas P. Briggs, Chief Financial Officer

QuickLinks

ITEM 12: Results of Operations and Financial Condition

SIGNATURES

Filing Compare · HORIZON ORGANIC HOLDING CORP