<PAGE>
                       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

                                February 20, 1999
                        (Date of earliest event reported)

                         K N Energy, Inc. (Exact name of
                     Registrant as specified in its charter)

       Kansas                    1-6446                   48-0290000
(State of Incorporation) (Commission File No.) (IRS Employer Identification No.)

                              370 Van Gordon Street
                                P. O. Box 281304
                          Lakewood, Colorado 80228-8304
          (Address of principal executive offices, including zip code)

                                 (303) 989-1740
              (Registrant's telephone number, including area code)
<PAGE>
Item 5.   Other Events.

          K N Energy, Inc., a Kansas corporation (the "Company") has entered
into an Agreement and Plan of Merger (the "Merger Agreement"), dated as of
February 20, 1999, among Sempra Energy, a California corporation ("Sempra"),
Cardinal Acquisition Corp., a California corporation ("Merger Sub"), and the
Company. Pursuant to the Merger Agreement, among other things, the Company will
be merged with and into Merger Sub, with Merger Sub as the surviving corporation
(the "Merger"). Under the terms of the Merger Agreement, each outstanding share
of common stock, par value $5.00 per share, of the Company ("Company Common
Stock") (other than shares with respect to which dissenters' appraisal rights
are perfected under applicable state law) will be converted into the right to
receive, at the election of the holder of the Company Common Stock, either (a)
 .7805 shares of common stock, no par value, of Sempra ("Sempra Common Stock")
plus $7.50, (b) 1.115 shares of Sempra Common Stock, or (c) $25.00, subject to
pro-ration such that 70 percent of the Company Common Stock outstanding will be
converted into Sempra Common Stock and 30 percent will be converted into cash.
The Merger is conditioned upon, among other things, the approvals of
shareholders of the Company and Sempra and certain regulatory approvals,
including approval of the Federal Energy Regulatory Commission and clearance
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The Merger
Agreement is filed herewith as Exhibit 99.1 and is incorporated herein by
reference.

Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits.

          (c)  Exhibits

               99.1      Agreement and Plan of Merger, dated as of February
                         20, 1999, among Sempra, Merger Sub and the Company.

               99.2      Joint Press Release of the Company and Sempra, issued
                         February 22, 1999.
<PAGE>
                                    SIGNATURE

          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.

                                        K N Energy, Inc.


                                        By:     /s/ Martha B. Wyrsch
                                                ---------------------
                                        Name:   Martha B. Wyrsch
                                        Title:  Vice President, General Counsel
                                                  and Secretary

Date:  February 23, 1999
<PAGE>
                                  Exhibit Index

Exhibit             Description

99.1                Agreement and Plan of Merger, dated as of February 20, 1999,
                    among Sempra, Merger Sub and the Company.

99.2                Joint Press Release of the Company and Sempra, issued
                    February 22, 1999.
[{"type": "8-K", "sequence": "1", "description": "FORM 8-K", "secsgml_size_bytes": 4048}]
{"company-data": {"conformed-name": "K N ENERGY INC", "cik": "0000054502", "assigned-sic": "4923", "irs-number": "480290000", "state-of-incorporation": "KS", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-06446", "film-number": "99547377"}, "business-address": {"street1": "370 VAN GORDON ST", "street2": "PO BOX 281304", "city": "LAKEWOOD", "state": "CO", "zip": "80228-8304", "phone": "3039891740"}, "mail-address": {"street1": "370 VAN GORDON STREET", "street2": "P O BOX 281304", "city": "LAKEWOOD", "state": "CO", "zip": "80228-8304"}, "former-company": [{"former-conformed-name": "KN ENERGY INC", "date-changed": "19920430"}, {"former-conformed-name": "KANSAS NEBRASKA NATURAL GAS CO INC", "date-changed": "19830403"}]}
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

                                February 20, 1999
                        (Date of earliest event reported)

                         K N Energy, Inc. (Exact name of
                     Registrant as specified in its charter)

       Kansas                    1-6446                   48-0290000
(State of Incorporation) (Commission File No.) (IRS Employer Identification No.)

                              370 Van Gordon Street
                                P. O. Box 281304
                          Lakewood, Colorado 80228-8304
          (Address of principal executive offices, including zip code)

                                 (303) 989-1740
              (Registrant's telephone number, including area code)
Item 5.   Other Events.

          K N Energy, Inc., a Kansas corporation (the "Company") has entered
into an Agreement and Plan of Merger (the "Merger Agreement"), dated as of
February 20, 1999, among Sempra Energy, a California corporation ("Sempra"),
Cardinal Acquisition Corp., a California corporation ("Merger Sub"), and the
Company. Pursuant to the Merger Agreement, among other things, the Company will
be merged with and into Merger Sub, with Merger Sub as the surviving corporation
(the "Merger"). Under the terms of the Merger Agreement, each outstanding share
of common stock, par value $5.00 per share, of the Company ("Company Common
Stock") (other than shares with respect to which dissenters' appraisal rights
are perfected under applicable state law) will be converted into the right to
receive, at the election of the holder of the Company Common Stock, either (a)
 .7805 shares of common stock, no par value, of Sempra ("Sempra Common Stock")
plus $7.50, (b) 1.115 shares of Sempra Common Stock, or (c) $25.00, subject to
pro-ration such that 70 percent of the Company Common Stock outstanding will be
converted into Sempra Common Stock and 30 percent will be converted into cash.
The Merger is conditioned upon, among other things, the approvals of
shareholders of the Company and Sempra and certain regulatory approvals,
including approval of the Federal Energy Regulatory Commission and clearance
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The Merger
Agreement is filed herewith as Exhibit 99.1 and is incorporated herein by
reference.

Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits.

          (c)  Exhibits

               99.1      Agreement and Plan of Merger, dated as of February
                         20, 1999, among Sempra, Merger Sub and the Company.

               99.2      Joint Press Release of the Company and Sempra, issued
                         February 22, 1999.
SIGNATURE

          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.

                                        K N Energy, Inc.

                                        By:     /s/ Martha B. Wyrsch
                                                ---------------------
                                        Name:   Martha B. Wyrsch
                                        Title:  Vice President, General Counsel
                                                  and Secretary

Date:  February 23, 1999
Exhibit Index

Exhibit             Description

99.1                Agreement and Plan of Merger, dated as of February 20, 1999,
                    among Sempra, Merger Sub and the Company.

99.2                Joint Press Release of the Company and Sempra, issued
                    February 22, 1999.