Company: SPR
Filing Date: 2025-12-08
Form Type: S-8 POS
Source: 0001104659-25-119108
Chunk: 0

Company: Spirit AeroSystems Holdings, Inc.
Filing Date: 2025-12-08
Form: S-8 POS
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on December 8, 2025</div>

Registration Nos. 333-141299, 333-146112,
333-195790, 333-220358,
333-272143 and 333-279170

<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

AMENDMENT NO. 1 TO
FORM S-8
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

Spirit AeroSystems Holdings, Inc.

(Exact name of registrant as specified in its charter)</div>

| Delaware                                                       | 20-2436320                          |
| (State or other jurisdiction of incorporation or organization) | -I.R.S. Employer Identification No. |

<div align='center'>3801 South Oliver

Wichita, Kansas 67210

(Address of Principal Executive Offices) (Zip Code)

Spirit AeroSystems Holdings, Inc. Union Equity Participation Plan
Spirit AeroSystems Holdings, Inc. Supplemental Executive Retirement Plan
Spirit AeroSystems Holdings, Inc. 2014 Omnibus Incentive Plan
Spirit AeroSystems Employee Stock Purchase Plan
Spirit AeroSystems Holdings, Inc. Amended and Restated 2014 Omnibus Incentive Plan
Amended and Restated Spirit AeroSystems Employee Stock Purchase Plan

(Full title of the plan)

David Myers

Vice President, General Counsel and Corporate Secretary

Spirit AeroSystems Holdings, Inc.

3801 South Oliver

Wichita, Kansas 67210

(Name and address of agent for service)

(316) 526 9000

(Telephone number, including area code, of agent
for service)

With copies to:

John C. Demers

Vice President, Assistant General Counsel and Corporate Secretary

The Boeing Company

929 Long Bridge Drive, Arlington, VA 22202

(703) 465-3500</div>

Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, a non-accelerated filer, 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-2 of the Exchange Act.

| Large accelerated filer | x | Accelerated filer         | ¨ |
| Non-acceler