Company: SPR
Filing Date: 2025-12-08
Form Type: S-8 POS
Source: 0001104659-25-119108
Chunk: 1

Company: Spirit AeroSystems Holdings, Inc.
Filing Date: 2025-12-08
Form: S-8 POS
Chunk 1
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ated 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. ☐

<div align='center'>EXPLANATORY NOTE

DEREGISTRATION OF SECURITIES</div>

This post-effective amendment
relates to the following registration statements on Form S-8 (collectively, the “Registration Statements”) filed by Spirit
AeroSystems Holdings, Inc., a Delaware corporation (the “Company”):

| · | Registration Statement on Form S-8 (File No. 333-141299), filed with the Securities and Exchange Commission (the “SEC”) on March 14, 2007, registering 4,834,984 
 shares of the Company’s Class A Common Stock, par value $0.01 per share (“Common Stock”), to be offered under the                                                
 Spirit AeroSystems Holdings, Inc. Union Equity Participation Plan;                                                                                               |

| · | Registration Statement on Form S-8 (File No. 333-146112), filed with the SEC on September 17, 2007, registering 860,244 shares of Common Stock and 860,244 shares of 
 the Company’s Class B Common Stock, par value $0.01 per share, to be offered under the Spirit AeroSystems Holdings, Inc.                                             
 Supplemental Executive Retirement Plan;                                                                                                                              |

| · | Registration Statement on Form S-8 (File No. 333-195790), filed with the SEC on May 8, 2014, registering 8,500,000 shares of Common Stock to be offered under the Spirit 
 AeroSystems Holdings, Inc. 2014 Omnibus Incentive Plan;                                                                                                                  |

| · | Registration Statement on Form S-8 (File No. 333-220358), filed with the SEC on September 6, 2017, registering 1,000,000 shares of Common Stock to be offered under the 
 Spirit AeroSystems Employee Stock Purchase Plan;                                                                                                                        |

| · | Registration Statement on Form S-8 (File No. 333-272143), filed with the SEC on May 23, 2023, registering 5,000,000 shares of Common Stock to be offered under the