Company: BANC-PF
Filing Date: 2025-03-27
Form Type: DEFA14A
Source: 0001169770-25-000017
Chunk: 0

Company: BANC OF CALIFORNIA, INC.
Filing Date: 2025-03-27
Form: DEFA14A
Chunk 0
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#### SCHEDULE 14A
<div align='center'>(RULE 14a-101)</div>

### INFORMATION REQUIRED IN PROXY STATEMENT

#### SCHEDULE 14A INFORMATION
<div align='center'>Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No. )</div>

Filed by the Registrant ☒

Filed by a party other than the Registrant ☐

Check the appropriate box:

| ☐Preliminary Proxy Statement                                                        |
| ☐   Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐Definitive Proxy Statement                                                         |
| ☒   Definitive Additional Materials                                                 |
| ☐Soliciting Material under§240.14a-12                                               |

#### BANC OF CALIFORNIA, INC.
<div align='center'>(Name of Registrant as Specified In Its Charter)</div>

#### N/A
<div align='center'>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

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

☒ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11