Company: BA
Filing Date: 2025-03-07
Form Type: DEF 14A
Source: 0001193125-25-049921
Chunk: 120

Company: BOEING CO
Filing Date: 2025-03-07
Form: DEF 14A
Chunk 120
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). Where to Send All Proposals and Nominations Office of the Corporate Secretary The Boeing Company 929 Long Bridge Drive MC 7949-5929 Arlington, Virginia 22202-4208

| 2025 Proxy Statement |     | 101 |

ADDITIONAL INFORMATION

| Annual Meeting                                    |     | www.virtualshareholdermeeting.com/BA2025                 |
| Corporate Governance                              |     | www.boeing.com/company/general-info/corporate-governance |
| Strengthening Safety & Quality                    |     | www.boeing.com/strengthening-safety-and-quality          |
| Chief Aerospace Officer Report                    |     | www.boeing.com/safety/caso-report#introduction           |
| Safety                                            |     | www.boeing.com/safety                                    |
| Quality                                           |     | www.boeing.com/sustainability/quality                    |
| Sustainability & Social Impact Report             |     | www.boeing.com/sustainability                            |
| Ethics and Compliance                             |     | www.boeing.com/sustainability/ethics-and-compliance      |
| Community Engagement                              |     | www.boeing.com/sustainability/community-engagement       |
| Political Advocacy Report                         |     | www.boeing.com/company/key-orgs/government-operations    |
| Supplier Code of Conduct                          |     | www.boeingsuppliers.com/become#/expectations             |
| Code of Basic Working Conditions and Human Rights |     | www.boeing.com/sustainability/human-rights               |

| 102 |     | 2025 Proxy Statement |

APPENDIX A: RECONCILIATION OF NON-GAAPFINANCIAL MEASURES We supplement the reporting of our financial information determined under Generally Accepted Accounting Principles in the United States of America (GAAP) with certain non-GAAPfinancial information. The non-GAAPfinancial information presented excludes certain items that may not be indicative of, or are unrelated to, results from our ongoing business operations. We believe that these non-GAAPmeasures provide investors with additional insight into the Company’s ongoing business performance. These non-GAAPmeasures should not be considered in isolation or as a substitute for the related GAAP measures, and other companies may define such measures differently. We encourage investors to review our financial statements and publicly-filed reports in their entirety and not to rely on any single financial measure. Set forth below are definitions of the non-GAAPfinancial measures used in this proxy statement, as well as tables that reconcile these non-GAAPfinancial measures with the most directly comparable GA