CCL

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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) December 19, 2025

Carnival Corporation Carnival plc (Exact name of registrant as specified in its charter)(Exact name of registrant as specified in its charter)

Republic of Panama England and Wales (State or other jurisdiction of incorporation)(State or other jurisdiction of incorporation)

001-9610001-15136 (Commission File Number)(Commission File Number)

59-156297698-0357772 (IRS Employer Identification No.)(IRS Employer Identification No.)

3655 N.W. 87th Avenue Miami, Florida 33178-2428 Carnival House, 100 Harbour Parade Southampton SO15 1ST, United Kingdom

(Address of principal executive offices) (Zip Code)(Address of principal executive offices) (Zip Code)

(305) 599-2600 011 44 23 8065 5000

(Registrant’s telephone number, including area code)(Registrant’s telephone number, including area code)

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions:

☐ 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))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock ($0.01 par value)CCLNew York Stock Exchange, Inc.

Ordinary Shares each represented by American Depositary Shares ($1.66 par value) Special Voting Share, GBP 1.00 par value and Trust Shares of beneficial interest in the P&O Princess Special Voting Trust CUKNew York Stock Exchange, Inc.

1.000% Senior Notes due 2029CUK29New York Stock Exchange LLC

Indicate by check mark whether the registrants are emerging growth companies as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2) of this chapter).

Emerging growth companies ☐

If emerging growth companies, indicate by check mark if the registrants have 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. o

Section 2 - Financial Information

Item 2.02 Results of Operations and Financial Condition.

On December 19, 2025, Carnival Corporation & plc issued a press release entitled “CARNIVAL CORPORATION & PLC ACHIEVES RECORD FULL YEAR ADJUSTED NET INCOME AND INVESTMENT GRADE LEVERAGE METRICS, REINSTATES DIVIDEND” A copy of this press release is furnished as Exhibit 99.1 to this report. This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of either Carnival Corporation or Carnival plc, whether made before or after the date of this report, regardless of any general incorporation language in the filing.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit 99.1 Press release, dated December 19, 2025 (furnished pursuant to Item 2.02).

SIGNATURES

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

CARNIVAL CORPORATIONCARNIVAL PLC

By:/s/ David BernsteinBy:/s/ David Bernstein Name:David BernsteinName:David Bernstein Title:Chief Financial Officer and Chief Accounting OfficerTitle:Chief Financial Officer and Chief Accounting Officer

Date:December 19, 2025 Date:December 19, 2025

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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) September 29, 2025

Carnival Corporation Carnival plc (Exact name of registrant as specified in its charter)(Exact name of registrant as specified in its charter)

Republic of Panama England and Wales (State or other jurisdiction of incorporation)(State or other jurisdiction of incorporation)

001-9610001-15136 (Commission File Number)(Commission File Number)

59-156297698-0357772 (IRS Employer Identification No.)(IRS Employer Identification No.)

3655 N.W. 87th Avenue Miami, Florida 33178-2428 Carnival House, 100 Harbour Parade Southampton SO15 1ST, United Kingdom

(Address of principal executive offices) (Zip Code)(Address of principal executive offices) (Zip Code)

(305) 599-2600 011 44 23 8065 5000

(Registrant’s telephone number, including area code)(Registrant’s telephone number, including area code)

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions:

☐ 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))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock ($0.01 par value)CCLNew York Stock Exchange, Inc.

Ordinary Shares each represented by American Depositary Shares ($1.66 par value) Special Voting Share, GBP 1.00 par value and Trust Shares of beneficial interest in the P&O Princess Special Voting Trust CUKNew York Stock Exchange, Inc.

1.000% Senior Notes due 2029CUK29New York Stock Exchange LLC

Indicate by check mark whether the registrants are emerging growth companies as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2) of this chapter).

Emerging growth companies ☐

If emerging growth companies, indicate by check mark if the registrants have 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. o

Section 2 - Financial Information

Item 2.02 Results of Operations and Financial Condition.

On September 29, 2025, Carnival Corporation & plc issued a press release entitled “CARNIVAL CORPORATION & PLC ACHIEVES ALL-TIME HIGH FINANCIAL RESULTS WITH NET INCOME OF $1.9 BILLION (ADJUSTED NET INCOME OF $2 BILLION).” A copy of this press release is furnished as Exhibit 99.1 to this report. This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of either Carnival Corporation or Carnival plc, whether made before or after the date of this report, regardless of any general incorporation language in the filing.

Section 7 - Regulation FD Disclosure

Item 7.01 - Regulation FD Disclosure.

On September 29, 2025, pursuant to the indenture, dated as of November 18, 2022 (the “Convertible Notes Indenture”), by and among Carnival Corporation (the “Company”), Carnival plc, the other guarantors party thereto and U.S. Bank Trust Company, National Association, as trustee, the Company issued a notice of redemption for the entire outstanding principal amount of its 5.75% convertible senior notes due 2027 (the “Convertible Notes”) to be redeemed on December 5, 2025 (the “Redemption Date”) at a redemption price equal to 100.0% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the Redemption Date.

As a result of the Company’s call for redemption of the Convertible Notes, the Convertible Notes are convertible, at the option of the holder, at any time prior to 5:00 p.m., New York City time, on December 3, 2025, the second scheduled trading day immediately preceding the Redemption Date (the “Conversion Period”).

On September 26, 2025, the Conversion

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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) June 24, 2025

Carnival Corporation Carnival plc (Exact name of registrant as specified in its charter)(Exact name of registrant as specified in its charter)

Republic of Panama England and Wales (State or other jurisdiction of incorporation)(State or other jurisdiction of incorporation)

001-9610001-15136 (Commission File Number)(Commission File Number)

59-156297698-0357772 (IRS Employer Identification No.)(IRS Employer Identification No.)

3655 N.W. 87th Avenue Miami, Florida 33178-2428 Carnival House, 100 Harbour Parade Southampton SO15 1ST, United Kingdom

(Address of principal executive offices) (Zip Code)(Address of principal executive offices) (Zip Code)

(305) 599-2600 011 44 23 8065 5000

(Registrant’s telephone number, including area code)(Registrant’s telephone number, including area code)

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions:

☐ 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))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock ($0.01 par value)CCLNew York Stock Exchange, Inc.

Ordinary Shares each represented by American Depositary Shares ($1.66 par value) Special Voting Share, GBP 1.00 par value and Trust Shares of beneficial interest in the P&O Princess Special Voting Trust CUKNew York Stock Exchange, Inc.

1.000% Senior Notes due 2029CUK29New York Stock Exchange LLC

Indicate by check mark whether the registrants are emerging growth companies as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2) of this chapter).

Emerging growth companies ☐

If emerging growth companies, indicate by check mark if the registrants have 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. o

Section 2 - Financial Information

Item 2.02 Results of Operations and Financial Condition.

On June 24, 2025, Carnival Corporation & plc issued a press release entitled “CARNIVAL CORPORATION & PLC TOPS GUIDANCE ACHIEVING HIGHEST-EVER SECOND QUARTER OPERATING RESULTS AND EXCEEDING 2026 SEA CHANGE FINANCIAL TARGETS 18 MONTHS EARLY.” A copy of this press release is furnished as Exhibit 99.1 to this report. This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of either Carnival Corporation or Carnival plc, whether made before or after the date of this report, regardless of any general incorporation language in the filing.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit 99.1 Press release, dated June 24, 2025 (furnished pursuant to Item 2.02).

SIGNATURES

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

CARNIVAL CORPORATIONCARNIVAL PLC

By:/s/ David BernsteinBy:/s/ David Bernstein Name:David BernsteinName:David Bernstein Title:Chief Financial Officer and Chief Accounting OfficerTitle:Chief Financial Officer and Chief Accounting Officer

Date:June 24, 2025Date:June 24, 2025