XEL

xel-20260205FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032026-02-052026-02-050000072903xel:NORTHERNSTATESPOWERCOMember2026-02-052026-02-050000072903xel:NORTHERNSTATESPOWERCOWIMember2026-02-052026-02-050000072903xel:PUBLICSERVICECOOFCOLORADOMember2026-02-052026-02-050000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2026-02-052026-02-050000072903us-gaap:CommonStockMember2026-02-052026-02-050000072903xel:A6.25JuniorSubordinatedNotesDue2085Member2026-02-052026-02-05

UNITED STATES

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) February 5, 2026

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau Claire,Wisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 3500 Blake Street Denver,Colorado80205 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan Amarillo,Texas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC 6.25% Junior Subordinated Notes due 2085XELLLNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On February 5, 2026, Xcel Energy released earnings results for the fourth quarter of 2025.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Feb. 5, 2026.

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.

Feb. 5, 2026Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20251030FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032025-10-302025-10-300000072903xel:NORTHERNSTATESPOWERCOMember2025-10-302025-10-300000072903xel:NORTHERNSTATESPOWERCOWIMember2025-10-302025-10-300000072903xel:PUBLICSERVICECOOFCOLORADOMember2025-10-302025-10-300000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2025-10-302025-10-300000072903us-gaap:CommonStockMember2025-10-302025-10-300000072903xel:A6.25JuniorSubordinatedNotesDue2085Member2025-10-302025-10-30

UNITED STATES

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) October 30, 2025

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau Claire,Wisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 3500 Blake Street Denver,Colorado80205 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan Amarillo,Texas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC 6.25% Junior Subordinated Notes due 2085XELLLNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On October 30, 2025, Xcel Energy released earnings results for the third quarter of 2025.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated October 30, 2025.

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.

Oct. 30, 2025Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20250731FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032025-07-312025-07-310000072903xel:NORTHERNSTATESPOWERCOMember2025-07-312025-07-310000072903xel:NORTHERNSTATESPOWERCOWIMember2025-07-312025-07-310000072903xel:PUBLICSERVICECOOFCOLORADOMember2025-07-312025-07-310000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2025-07-312025-07-31

UNITED STATES

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) July 31, 2025

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall Minneapolis,Minnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau Claire,Wisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 3500 Blake Street Denver,Colorado80205 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan Amarillo,Texas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On July 31, 2025, Xcel Energy released earnings results for the second quarter of 2025.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated July 31, 2025.

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.

July 31, 2025Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20250424FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032025-04-242025-04-240000072903xel:NORTHERNSTATESPOWERCOMember2025-04-242025-04-240000072903xel:NORTHERNSTATESPOWERCOWIMember2025-04-242025-04-240000072903xel:PUBLICSERVICECOOFCOLORADOMember2025-04-242025-04-240000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2025-04-242025-04-24

UNITED STATES

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) April 24, 2025

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On April 24, 2025, Xcel Energy released earnings results for the first quarter of 2025.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated April 24, 2025.

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.

October 31, 2024Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20250206FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032025-02-062025-02-060000072903xel:NORTHERNSTATESPOWERCOMember2025-02-062025-02-060000072903xel:NORTHERNSTATESPOWERCOWIMember2025-02-062025-02-060000072903xel:PUBLICSERVICECOOFCOLORADOMember2025-02-062025-02-060000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2025-02-062025-02-06

UNITED STATES

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) February 6, 2025

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On February 6, 2025, Xcel Energy released earnings results for the fourth quarter of 2024.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Feb. 6, 2025.

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.

February 6, 2025Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20241031FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032024-10-312024-10-310000072903xel:NORTHERNSTATESPOWERCOMember2024-10-312024-10-310000072903xel:NORTHERNSTATESPOWERCOWIMember2024-10-312024-10-310000072903xel:PUBLICSERVICECOOFCOLORADOMember2024-10-312024-10-310000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2024-10-312024-10-31

UNITED STATES

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) October 31, 2024

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On Oct. 31, 2024, Xcel Energy released earnings results for the third quarter of 2024.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Oct. 31, 2024.

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.

October 31, 2024Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20240801FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032024-08-012024-08-010000072903xel:NORTHERNSTATESPOWERCOMember2024-08-012024-08-010000072903xel:NORTHERNSTATESPOWERCOWIMember2024-08-012024-08-010000072903xel:PUBLICSERVICECOOFCOLORADOMember2024-08-012024-08-010000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2024-08-012024-08-01

UNITED STATES

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 1, 2024

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On August 1, 2024, Xcel Energy released earnings results for the second quarter of 2024.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated August 1, 2024.

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.

August 1, 2024Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20240425FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032024-04-252024-04-250000072903xel:NORTHERNSTATESPOWERCOMember2024-04-252024-04-250000072903xel:NORTHERNSTATESPOWERCOWIMember2024-04-252024-04-250000072903xel:PUBLICSERVICECOOFCOLORADOMember2024-04-252024-04-250000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2024-04-252024-04-25

UNITED STATES

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) April 25, 2024

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On April 25, 2024, Xcel Energy released earnings results for the first quarter of 2024.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated April 25, 2024.

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.

April 25, 2024Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20240125FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032024-01-252024-01-250000072903xel:NORTHERNSTATESPOWERCOMember2024-01-252024-01-250000072903xel:NORTHERNSTATESPOWERCOWIMember2024-01-252024-01-250000072903xel:PUBLICSERVICECOOFCOLORADOMember2024-01-252024-01-250000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2024-01-252024-01-25

UNITED STATES

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) January 25, 2024

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On January 25, 2024, Xcel Energy released earnings results for the fourth quarter of 2023.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Jan. 25, 2024.

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.

January 25, 2024Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20231027FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032023-10-272023-10-270000072903xel:NORTHERNSTATESPOWERCOMember2023-10-272023-10-270000072903xel:NORTHERNSTATESPOWERCOWIMember2023-10-272023-10-270000072903xel:PUBLICSERVICECOOFCOLORADOMember2023-10-272023-10-270000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2023-10-272023-10-27

UNITED STATES

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) October 27, 2023

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On Oct. 27, 2023, Xcel Energy released earnings results for the third quarter of 2023.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Oct. 27, 2023.

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.

October 27, 2023Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20230727FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032023-07-272023-07-270000072903xel:NORTHERNSTATESPOWERCOMember2023-07-272023-07-270000072903xel:NORTHERNSTATESPOWERCOWIMember2023-07-272023-07-270000072903xel:PUBLICSERVICECOOFCOLORADOMember2023-07-272023-07-270000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2023-07-272023-07-27

UNITED STATES

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) July 27, 2023

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On July 27, 2023, Xcel Energy released earnings results for the second quarter of 2023.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated July 27, 2023.

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.

July 27, 2023Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20230427FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032023-04-272023-04-270000072903xel:NORTHERNSTATESPOWERCOMember2023-04-272023-04-270000072903xel:NORTHERNSTATESPOWERCOWIMember2023-04-272023-04-270000072903xel:PUBLICSERVICECOOFCOLORADOMember2023-04-272023-04-270000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2023-04-272023-04-27

UNITED STATES

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) April 27, 2023

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On April 27, 2023, Xcel Energy released earnings results for the first quarter of 2023.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated April 27, 2023.

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.

April 27, 2023Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20230126FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032023-01-262023-01-260000072903xel:NORTHERNSTATESPOWERCOMember2023-01-262023-01-260000072903xel:NORTHERNSTATESPOWERCOWIMember2023-01-262023-01-260000072903xel:PUBLICSERVICECOOFCOLORADOMember2023-01-262023-01-260000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2023-01-262023-01-26

UNITED STATES

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) January 26, 2023

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On January 26, 2023, Xcel Energy released earnings results for the fourth quarter of 2022.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Jan. 26, 2023.

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.

January 26, 2023Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20221027FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032022-10-272022-10-270000072903xel:NORTHERNSTATESPOWERCOMember2022-10-272022-10-270000072903xel:NORTHERNSTATESPOWERCOWIMember2022-10-272022-10-270000072903xel:PUBLICSERVICECOOFCOLORADOMember2022-10-272022-10-270000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2022-10-272022-10-27

UNITED STATES

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) October 27, 2022

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On Oct. 27, 2022, Xcel Energy released earnings results for the third quarter of 2022.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Oct. 27, 2022.

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.

October 27, 2022Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20220728FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032022-07-282022-07-280000072903xel:NORTHERNSTATESPOWERCOMember2022-07-282022-07-280000072903xel:NORTHERNSTATESPOWERCOWIMember2022-07-282022-07-280000072903xel:PUBLICSERVICECOOFCOLORADOMember2022-07-282022-07-280000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2022-07-282022-07-28

UNITED STATES

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) July 28, 2022

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On July 28, 2022, Xcel Energy released earnings results for the second quarter of 2022.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated July 28, 2022.

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.

July 28, 2022Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20220428FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032022-04-282022-04-280000072903xel:NORTHERNSTATESPOWERCOMember2022-04-282022-04-280000072903xel:NORTHERNSTATESPOWERCOWIMember2022-04-282022-04-280000072903xel:PUBLICSERVICECOOFCOLORADOMember2022-04-282022-04-280000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2022-04-282022-04-28

UNITED STATES

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) April 28, 2022

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On April 28, 2022, Xcel Energy released earnings results for the first quarter of 2022.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated April 28, 2022.

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.

April 28, 2022Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20220127FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032022-01-272022-01-270000072903xel:NORTHERNSTATESPOWERCOMember2022-01-272022-01-270000072903xel:NORTHERNSTATESPOWERCOWIMember2022-01-272022-01-270000072903xel:PUBLICSERVICECOOFCOLORADOMember2022-01-272022-01-270000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2022-01-272022-01-27

UNITED STATES

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) January 27, 2022

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On January 27, 2022, Xcel Energy released earnings results for the fourth quarter of 2021.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Jan. 27, 2022.

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.

January 27, 2022Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20210729FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032021-07-292021-07-290000072903xel:NORTHERNSTATESPOWERCOMember2021-07-292021-07-290000072903xel:NORTHERNSTATESPOWERCOWIMember2021-07-292021-07-290000072903xel:PUBLICSERVICECOOFCOLORADOMember2021-07-292021-07-290000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2021-07-292021-07-29

UNITED STATES

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) July 29, 2021

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On July 29, 2021, Xcel Energy released earnings results for the second quarter of 2021.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated July 29, 2021.

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.

July 29, 2021Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20210429FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032021-04-292021-04-290000072903xel:NORTHERNSTATESPOWERCOMember2021-04-292021-04-290000072903xel:NORTHERNSTATESPOWERCOWIMember2021-04-292021-04-290000072903xel:PUBLICSERVICECOOFCOLORADOMember2021-04-292021-04-290000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2021-04-292021-04-29

UNITED STATES

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) April 29, 2021

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer Street, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On April 29, 2021, Xcel Energy released earnings results for the first quarter of 2021.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated April 29, 2021.

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.

April 29, 2021Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer

xel-20210128FALSEXCEL ENERGY INC0000072903MNNORTHERN STATES POWER CO0001123852MNNORTHERN STATES POWER CO /WI/0000072909WIPUBLIC SERVICE CO OF COLORADO0000081018COSOUTHWESTERN PUBLIC SERVICE CO0000092521NM00000729032021-01-282021-01-280000072903xel:NORTHERNSTATESPOWERCOMember2021-01-282021-01-280000072903xel:NORTHERNSTATESPOWERCOWIMember2021-01-282021-01-280000072903xel:PUBLICSERVICECOOFCOLORADOMember2021-01-282021-01-280000072903xel:SOUTHWESTERNPUBLICSERVICECOMember2021-01-282021-01-28

UNITED STATES

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) January 28, 2021

Commission File Number Exact Name of Registrant as Specified in its Charter; State of Incorporation; Address of Principal Executive Offices; and Telephone Number IRS Employer Identification Number

001-3034 XCEL ENERGY INC. 41-0448030

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

000-31387 NORTHERN STATES POWER COMPANY 41-1967505

(a Minnesota corporation) 414 Nicollet Mall MinneapolisMinnesota55401 (612)330-5500

001-03140 NORTHERN STATES POWER COMPANY 39-0508315

(a Wisconsin corporation) 1414 W. Hamilton Avenue Eau ClaireWisconsin54701 (715)737-2625

001-3280 PUBLIC SERVICE COMPANY OF COLORADO 84-0296600

(a Colorado corporation) 1800 Larimer, Suite 1100 DenverColorado80202 (303)571-7511

001-03789 SOUTHWESTERN PUBLIC SERVICE COMPANY 75-0575400

(a New Mexico corporation) 790 South Buchanan AmarilloTexas79101 (303)571-7511

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common StockXELNasdaq Stock Market LLC

Item 2.02. Results of Operations and Financial Condition

On Jan. 28, 2021, Xcel Energy released earnings results for the fourth quarter of 2020.

See additional information in the Earnings Release furnished as exhibit 99.01.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description

99.01 Earnings Release of Xcel Energy dated Jan. 28, 2021.

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.

Jan. 28, 2021Xcel Energy Inc. (a Minnesota corporation)

Northern States Power Company (a Minnesota corporation)

Northern States Power Company (a Wisconsin corporation)

Public Service Company of Colorado (a Colorado corporation)

Southwestern Public Service Company (a New Mexico corporation)

/s/ BRIAN J. VAN ABEL Brian J. Van Abel Executive Vice President, Chief Financial Officer