Company: BA
Filing Date: 2025-07-29
Form Type: S-8
Source: 0001193125-25-168131
Chunk: 0

Company: BOEING CO
Filing Date: 2025-07-29
Form: S-8
Chunk 0
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As filed with the Securities and Exchange Commission on July 29, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 THE BOEING COMPANY (Exact name of registrant as specified in its charter)

| Delaware                                 |     |         91-0425694 |
| (State or other jurisdiction of          
 incorporation or organization)           |     |   -I.R.S. Employer 
 Identification No. |
| 929 Long Bridge Drive, Arlington, VA     |     |              22202 |
| (Address of Principal Executive Offices) |     |          -Zip Code |

The Boeing Company 401(k) Retirement Plan (f/k/a The Boeing Company Voluntary Investment Plan) (Full title of the plans) John C. Demers Vice President, Assistant General Counsel and Corporate Secretary The Boeing Company 929 Long Bridge Drive, Arlington, VA 22202 (Name and address for agent for service) (703) 465-3500 (Telephone number, including area code, of agent for service) Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-acceleratedfiler, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | 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 7(a)(2)(B) of the Securities Act ☐

EXPLANATORY NOTE

This Registration Statement on Form S-8 is being filed with the United States Securities and Exchange Commission (the
“Commission”) for the purpose of registering an additional 30,000,000 shares of the common stock, par value $5.00 per share (“Common Stock”), of The Boeing Company (the “Company”)