Company: UEPCP
Filing Date: 2025-03-25
Form Type: DEFA14C
Source: 0001104659-25-027832
Chunk: 0

Company: UNION ELECTRIC CO
Filing Date: 2025-03-25
Form: DEFA14C
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14C INFORMATION

Information Statement Pursuant to Section 14(c) of the

Securities Exchange Act of 1934

(Amendment No. )</div>

Check the appropriate box:

| ¨ | Preliminary                                                       
 Information Statement                                             |
| ¨ | Confidential,                                                     
 for Use of the Commission Only (as permitted by Rule 14c-5(d)(2)) |
| ¨ | Definitive                                                        
 Information Statement                                             |
| x | Definitive Additional Materials                                   |

<div align='center'>Union Electric Company

(Name of Registrant as Specified In Its Charter)</div>

Payment of Filing Fee (Check all boxes that apply):

| x | No fee required                                                                                                                                                   |
| ¨ | Fee paid previously with preliminary materials                                                                                                                    |
| ¨ | Fee computed on table in exhibit required by Item 25(b) of Schedule 14A (17 CFR 240.14a-101) per Item 1 of this Schedule and Exchange Act Rules 14c-5(g) and 0-11 |

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