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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

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Annual Report Pursuant to Section 15(d) of the

Securities Exchange Act of 1934

FORM 11-K

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OR

Commission file number 001-07349

A. Full title of the Plan and the address of the Plan, if different from that of the issuer named below:

BALL CORPORATION

401(K) AND EMPLOYEE STOCK OWNERSHIP PLAN

B. Name of issuer of the securities held pursuant to the Plan and the address of its principal executive office:

BALL CORPORATION

9200 W. 108^th Circle

Westminster, Colorado, 80021-2510

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Index to Financial Statements

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Report of Independent Registered Public Accounting Firm

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To the Global Pension & Benefits Committee

Ball Corporation 401(k) and Employee Stock Ownership Plan

Westminster, Colorado

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Opinion on the Financial Statements

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We have audited the accompanying statements of net assets available for benefits of the Ball Corporation 401(k) and Employee Stock Ownership Plan (the “Plan”) as of December 31, 2023 and 2022, the related statements of changes in net assets available for benefits for the year ended December 31, 2023 and 2022, and the related notes (collectively, the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2023 and 2022, and the changes in net assets available for benefits for the years then ended, in conformity with accounting principles generally accepted in the United States of America.

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Basis for Opinion

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These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on the Plan’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

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We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion.

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Our audits included performing procedures to assess the risk of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by the Plan’s management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

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Supplemental Information

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The supplemental information in the accompanying schedule of assets (held at end of year) as of December 31, 2023, have been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental information is presented for the purpose of additional analysis and is not a required part of the financial statements but included supplemental information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. The supplemental information is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

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/s/ BDO USA, P.C.

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We have served as the Plan’s auditor since 2021.

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Denver, Colorado

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June 7, 2024

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Statements of Net Assets Available for Benefits

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See accompanying Notes to Financial Statements

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Statements of Changes in Net Assets Available for Benefits

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See accompanying Notes to Financial Statements

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

Note 1–Description of the Plan

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The following is a brief description of the Ball Corporation 401(k) and Employee Stock Ownership Plan (the “Plan”). Participants should refer to the Plan Document or the Summary Plan Description for more complete information.

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General

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The Plan is a defined contribution plan established on September 1, 1983. Ball Corporation (the “Company”) is the Plan’s Sponsor and the Plan is administered by the Global Pension and Benefits Committee (“GPBC”). The Plan was most recently amended and restated effective January 1, 2015.

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The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”).

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On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was passed into law. The CARES Act expands the ability of certain 401(k) plan participants to withdraw, penalty free, funds from their vested retirement plan accounts (up to $100,000), increases the participant loan limit to $100,000, and delays loan repayments for up to one year, subject to certain participant eligibility criteria. The Plan adopted the provisions of the CARES Act related to expanded ability of withdrawals and allowed for delayed loan repayments for up to one year if requested by participants. Effective January 1, 2022, the Plan was amended to include these provisions.

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Effective January 1, 2022, the Plan was amended to include an additional Non-Elective Company Contribution (“NECC”) for certain participants. Additional detail can be found in the Company Contributions section in Note 1.

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Effective January 1, 2022, the Plan was amended to make miscellaneous clarifications and revisions.

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On December 29, 2022, the Setting Every Community Up for Retirement Enhancement (“SECURE”) 2.0 Act was signed into law. Effective January 1, 2023, the SECURE Act 2.0 updates certain rules related to required minimum distributions (“RMDs”), special distribution provisions (related to hardship, penalty-free early distributions and birth and adoption distributions), Roth employer contributions, employer-funded participation financial incentives and plan corrections.

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On January 9, 2023, the Plan adopted a retroactive amendment, effective January 16, 2017, to reflect the Plan-related provisions of the collective bargaining agreement involving the Fort Worth location.

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Trustees and Recordkeepers of the Plan

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The GPBC decided to transition the trustee and recordkeeping functions from Vanguard Fiduciary Trust Company (the “Former Trustee” or “Vanguard”) to Voya Institutional Trust Company (the “Trustee” or “Voya”). This transition occurred on August 31, 2022. In order to facilitate this transition, a blackout period was established and enforced. For the period from August 26, 2022 to September 6, 2022 (the “blackout period”), participants were unable to direct or diversify investments in their individual accounts, or receive a distribution from the Plan.

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Eligibility

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All U.S. salaried and hourly employees of the Company, who are over 18 years of age and are in participating subsidiaries, are eligible to participate in the Plan. Employees who are considered temporary or seasonal become eligible upon completion of 1,000 hours of service in a computation period, as defined by the Plan Document. Eligibility to participate in the Plan begins with the first day of employment. An eligible employee who does not make an election about his or her participation in the Plan is automatically enrolled 30 days after his or her eligibility date.

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

Employee Contributions

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The Plan allows eligible participants to contribute a portion of their eligible pay to the Plan on a pre-tax basis and post-tax basis (Roth), within limits defined by the Plan. Such limits vary among certain employee classifications. Participants who have attained age 50 before the end of the Plan year are eligible to make catch-up contributions, subject to annual Internal Revenue Code (“IRC”) limitations. In all cases, the maximum contribution for a participant may not exceed the annual maximum limits established under IRC Section 402(g). All income earned from invested contributions accumulates on a tax deferred basis until withdrawal, unless contributions are made post-tax, via Roth feature, in which case withdrawals are tax-free.

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The Plan provides for the automatic enrollment at a specified percentage of pre-tax deferral of eligible pay (as defined for each group in the Plan Document) for newly hired employees, unless the employee affirmatively elects not to make a pre-tax contribution or elects to make contributions of a different amount or via the Plan’s Roth feature. The Plan also provides an automatic one-step increase. Employees may opt-out of the automatic increases at any time.

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Participants may change the level or type (e.g. pre-tax or Roth) of their contributions or suspend their contributions entirely at any time. The Plan also permits rollover contributions, which represent funds that participants transfer into the Plan from previous qualified plans.

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Company Contributions

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The Company generally makes a matching contribution each pay period that is based on the percentage of eligible pay that the participant contributes. The Company matching contribution and the ratio of the Company matching contribution to the participant contribution differs depending on the employee group in which the participant belongs. The maximum percentage of eligible pay which the Company will match is 6 percent. The Plan includes matching provisions in accordance with the provisions of the applicable union contracts.

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Effective January 1, 2022, the Plan was amended to include a new enhanced 401(k) program where Ball will make a 5 percent NECC to members accounts based on the member’s 401(k) eligible earnings, which will be paid each year after December 31. This program is applicable for salaried and non-union hourly employees hired on or after January 1, 2022, and for all hourly Verona plant employees. The Verona plant was subsequently closed, effective December 31, 2023. The NECC is invested in accordance with participant elections, except that the contributions cannot initially be invested to the Ball Corporation Common Stock Fund. Ball will only fund the NECC on behalf of the employees who are employed on the last day of the calendar year. The NECC was $6,841,135 in 2023 and $2,587,785 in 2022. The 2023 and 2022 contributions were funded in 2024 and 2023, respectively.

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Employees of Ball Aerospace and Technologies Corp. (“BATC”) who are not participants in the Ball Corporation Economic Value Added Incentive Compensation Plan may receive an additional match under the Plan. This provision allows for a match of up to a maximum of 2.0 percent of the eligible earnings that such eligible BATC Employee deferred; multiplied by the BATC Economic Value Added performance factor, between 0 and 1 (inclusive), in accordance with conditions of the BATC Performance Sharing Match Program; multiplied by a factor of 1.25. The additional match is invested in accordance with participant elections. BATC employees earned a full match in 2023, but not in 2022, based on the Economic Value Added performance factor achieved of 1.00 in 2023, compared to 0.88 in 2022. The Company contributions of this type were $13,936,401 in 2023 and $11,835,616 in 2022. The 2023 and 2022 contributions were funded in 2024 and 2023, respectively.

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The Company makes additional contributions for some employee groups. Generally, these contributions are made each pay period and are based on the eligible hours worked by the employee during the pay period. Additional contributions are invested in accordance with participant elections subject to the restrictions noted in the Company Stock paragraph below. The Company contributions of this type were $1,036,762 in 2023 and $1,145,463 in 2022.

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

Vesting

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Participants are fully vested in their own contributions and related earnings, any Company matching contributions and certain additional Company contributions, including related earnings. Vesting in the NECC is based on completed years of service. A participant becomes 100 percent vested in the NECC after three completed years of service.

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Forfeitures

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The forfeitures balance was $282,675 and $4,813 at December 31, 2023 and 2022, respectively. Forfeitures, if any, are used to pay plan expenses or reduce employer contributions. During 2023, no forfeitures were used for employer contributions or expenses. During 2022, $57,000 was used for employer contributions and $0 was used for expenses. The balance of uncashed checks was $303,960 and $289,193 at December 31, 2023 and 2022, respectively.

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Distribution of Benefits

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Distributions to employees are normally made upon termination of employment and upon submission of a request. Distribution methods available are lump sum, installments, and partial distributions. A request for distribution may be directed to the recordkeeper via written request, voice response system, internet site, or directly with the recordkeeper in accordance with Plan provisions. Upon termination, if a participant’s vested account balance is $5,000 or less, it cannot be left in the Plan. If the balance is $1,000 or less, the balance will be distributed in a lump sum payment. If the balance is more than $1,000 but less than or equal to $5,000, the amount will be transferred to an individual retirement account, unless a distribution is requested.

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At any time, a participant with an approved immediate and critical financial need may request a hardship withdrawal in an amount no greater than is necessary to satisfy such financial hardship.

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Notes Receivable from Participants

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Generally, loans bear interest at 1.0 percent above the Prime Rate (as published by Thomson Reuters News Agency) or the going rate for similar loans and are limited to the lesser of $50,000, reduced by the highest outstanding loan balance in the prior 12 month period, or 50 percent of a participant’s eligible account balance. Loans are distributed by lump sum, are paid back through installments, and are for a maximum of 5 years, unless used for the purchase of a principal residence, which can repaid over a 15 year term. Each participant is permitted only one outstanding loan at a time. Participant loans at December 31, 2023, had interest rates ranging from 4.25 percent to 9.50 percent.

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Participant Accounts

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Each participant’s account is credited with the participant’s contribution; the Company’s contributions, if applicable, and an allocation of Plan earnings (losses) and certain administrative expenses. Plan earnings (losses) and expenses are allocated to individuals’ accounts based on each participant’s account balance in their respective investment options selected. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account balance.

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Company Stock

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Effective November 1, 2005, contributions cannot be invested in the Ball Corporation Common Stock Fund if a participant has 35 percent or more of their account value invested in the Ball Corporation Common Stock Fund. In the event a participant’s investment in the Ball Corporation Common Stock Fund exceeds 35 percent, future contributions, loan payments and transfers to the Plan will be directed to the default investment fund until such time that the participant’s investment level in the Ball Corporation Common Stock Fund drops below 35 percent of their account value. The default investment fund is the date-specific Target Retirement fund that most closely matches the participant’s expected retirement

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

year (based on an assumed retirement age of 65). Company matching contributions are invested according to participant elections, except that the NECC cannot be initially invested to Ball Corporation Common Stock Fund.

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Voting Rights

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Each participant receives voting rights on his/her shares of Ball Corporation common stock.

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Company Stock Dividends

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Participants have the option to either reinvest dividends paid on his/her share of Ball Corporation common stock or receive the dividends in cash.

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Note 2–Summary of Significant Accounting Policies

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Basis of Accounting

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The Plan financial statements are prepared on the accrual basis of accounting.

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Investment Valuation

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The Plan’s investments are stated at fair value which is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 3 for discussion of fair value measurements.

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Contributions

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Participant contributions, employer contributions, and related matching contributions are recorded in the period payroll deductions are made.

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Income Recognition

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The net appreciation (depreciation) in the fair value of investments (net realized and unrealized gains and losses) is reflected in the accompanying Statements of Changes in Net Assets Available for Benefits. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Investment transactions are recorded on the date of purchase or sale (trade date). Capital gains/losses are included in the net appreciation (depreciation) in fair value of investments.

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Distributions

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Distributions to participants are recorded when paid.

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Expenses of the Plan

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Certain costs and expenses incurred in establishing, amending and administering the Plan, including the fees and expenses of the Trustee and Former Trustee, are paid by the Company and are excluded from the financial statements. The Plan pays for certain loan and distribution transaction fees and the annual recordkeeping fees that are charged to the related participants’ accounts.

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Plan recordkeeping fees are paid as a part of the expense ratios—the cost of running the fund, expressed as a percentage of the fund’s assets, as of the most recent fund prospectus—charged by the Plan investments. The range of expense ratios for the year ended December 31, 2023 was 0.01 percent to 0.57 percent. The range of expense ratios for the year ended December 31, 2022 was 0.01 percent to 0.63 percent. Fees paid by the Plan for the investment management services are included in net

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

appreciation (depreciation) in fair value of investments. Effective August 31, 2022, the annual Voya plan recordkeeping fee of $20 per participant is paid by Plan participants via an automatic quarterly deduction.

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Estimates

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The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires the Plan’s management to use estimates and assumptions that affect the reported amounts of assets and liabilities, and changes therein, and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates, and such differences could be material.

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Notes Receivable from Participants

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Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent loans are treated as distributions based upon the terms of the Plan Document.

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Note 3–Fair Value Measurements

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Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 820, Fair Value Measurements and Disclosures, establishes the framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs used to measure fair value using the following definitions (from highest to lowest priority):

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The asset’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques maximize the use of the relevant observable inputs and minimize the use of unobservable inputs.

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Following is a description of the valuation methodologies used for assets measured at fair value. There have been no changes in methodologies used at December 31, 2023 and 2022.

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Mutual funds: Mutual funds are valued at the daily closing price as reported by the fund. The mutual funds are exchange-traded open-ended funds.

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Ball Corporation Common Stock: Valued at the closing price reported on the active market on which the individual security is traded.

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Collective Investment Trusts: The investments include target date funds, a stable value fund, a large growth fund, a large value equity fund, a large equity index fund, a small/mid equity index fund, a broad market fixed income fund, a bond market index fund, a non-U.S. equity index fund and a non-lending series fund. The fair values of the Plan’s interest in the funds are based on the net asset value (“NAV”) reported by the fund managers as of the financial statement dates and recent transaction prices. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund less its liabilities. This practical expedient is not used

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

when it is determined to be probable that the fund will sell the investment for an amount different than the reported NAV. Participant transactions (purchases and sales) may occur daily. Were the Plan to initiate a full redemption of the collective trusts, the investment advisor reserves the right to temporarily delay withdrawal from the trusts in order to ensure that securities liquidations will be carried out in an orderly business manner.

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The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

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The Plan’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels.

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During the years ended December 31, 2023 and 2022, there were no liabilities accounted for at fair value on a recurring basis and no Level 3 assets or liabilities.

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The Plan does not include any Level 2 or 3 investments. The following tables set forth the fair value measurements as of December 31, 2023 and 2022, respectively:

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

The following table sets forth additional disclosures for the fair value measurement of investments in certain entities that calculate NAV per share (or its equivalent).

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Note 4–Plan Termination

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Although the Company has not expressed any intent to terminate the Plan, it may do so at any time. In the event of termination of the Plan, all participants would become 100 percent vested, to the extent not already vested, in their accounts and the assets of the Plan, after payment of any expenses, would be distributed to the participants in proportion to their respective account balances.

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Note 5–Federal Income Tax Status

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The Internal Revenue Service (“IRS”) informed the Company by a letter dated July 6, 2016, that the Plan and related trust were designed in accordance with the applicable provisions of the IRC. The Plan has since been amended; however, the Company believes the Plan is designed and being operated in compliance with the applicable provisions of the IRC.

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U.S. GAAP requires plan management to evaluate tax positions taken by the Plan and recognize a tax liability if the Plan has taken uncertain tax positions that more likely than not would not be sustained upon examination by the IRS or other applicable taxing authorities. The Plan administrator has analyzed tax positions taken by the Plan and has concluded that, as of December 31, 2023 and 2022, there are no uncertain tax positions taken that would require recognition of a liability or that would require disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits in progress for any tax periods.

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Note 6–Related Party and Party-In-Interest Transactions

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Plan assets include investments in funds managed by Vanguard. Vanguard was the Plan’s trustee/custodian and recordkeeper and, as such, transactions with the trustee/custodian qualify as party-in-interest transactions. These transactions are covered by an exemption from the prohibited transaction provisions of ERISA and the IRC. Notes receivable are secured by the vested balance of participant accounts, and, as such, these transactions qualify as party-in- interest transactions. Fees paid by the Plan for the investment management services are included in net appreciation (depreciation) in fair value of investments.

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The Plan invests in Ball Corporation common stock, common stock of the Plan sponsor, which also qualifies as a related party transaction. As of December 31, 2023 and 2022, the Plan held 5,413,563 and 6,098,808 shares of Ball Corporation common stock at a value of $311,388,144 and $311,432,781, respectively, along with cash in the Vanguard Prime Money Market Fund Admiral Shares of $1,230,607 and $892,090, respectively, which are held in the Ball Corporation Common Stock Fund. During the year ended December 31, 2023, purchases and sales of the Ball common stock were $0 and $36,845,668, respectively. During the year ended December 31, 2022, purchases and sales of the Ball common stock were $378,810,522 and

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Notes to Financial Statements

December 31, 2023 and 2022

$437,943,450, respectively. The gain (loss) on investment was $32,243,379 and ($298,842,581), and the dividends earned were $4,557,652 and $5,174,460 for 2023 and 2022, respectively for the Ball Corporation common stock. Transactions in such investments qualify as party-in-interest transactions, which are exempt from the prohibited transaction rules.

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Note 7–Concentrations, Risks and Uncertainties

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The following investments individually represent 10 percent or more of the Plan’s net assets available for benefits.

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The Plan provides for various investments in common stock, mutual funds, and collective investment trusts, which, in general, are exposed to various risks, such as significant world events, interest rates, credit risk and overall market volatility risk. Due to the level of risk associated with certain investments, it is reasonably possible that changes in the values of the investments will occur in the near term.

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Note 8 – Subsequent Events

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Management has evaluated subsequent events through the date these financial statements were issued, and determined that there were no events or transactions, except as described below, which require recognition or disclosure in these financial statements.

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Effective January 1, 2024, the SECURE Act 2.0 updates certain rules related to RMDs, special distribution provisions (related to emergency and domestic abuse victims), plan Roth accounts, surviving spouse treatment, Roth catch-up contributions, matching contributions for student loan repayments, mandatory distribution limits for terminated employee account balances, employer- offered emergency savings accounts and plan corrections for elective deferrals. Effective January 1, 2025, the SECURE Act 2.0 updates certain rules related to catch-up contributions for those aged 60 to 63 and offers plan participation to long-term part-time workers. The Plan will evaluate the impact of each of the provisions prior to the effective dates.

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Effective February 15, 2024, the Plan has been amended for issues related to the sale of Ball Aerospace & Technologies Corp. to BAE Systems, Inc., including an update to the true-up, Performance Sharing Match and Nonelective Company Contribution provisions for the related participants. In accordance with the Plan documents, former Ball Aerospace & Technologies Corp. participants have the option to rollover their 401(k) Plan assets. The impact of these rollovers is not estimable at this time.

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

at December 31, 2023

EIN 35-0160610 Plan #030

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(1) Identified party-in-interest

** Cost omitted per participant-directed accounts

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See accompanying Report of Independent Registered Public Accounting Firm and Notes to Financial Statements

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

SIGNATURE

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Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

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BALL CORPORATION

401(k) and Employee Stock Ownership Plan

EXHIBIT INDEX

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*Filed herewith