As filed with the Securities and Exchange Commission on May 8, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

BANC OF CALIFORNIA, INC.

(Exact name of registrant as specified in its charter)

11611 San Vicente Boulevard, Suite 500

Los Angeles, California 90049

(Address of Principal Executive Offices)

Second Amended and Restated Banc of California, Inc.

2018 Omnibus Stock Incentive Plan

Banc of California, Inc. 401(k) Plan

(Full titles of plans)

Ido Dotan

Executive Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary

Banc of California, Inc.

3 MacArthur Place

Santa Ana, California 92707

(855) 361-2262

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies To:

Patrick S. Brown

Sullivan & Cromwell LLP

1888 Century Park East, Suite 2100

Los Angeles, California 90067

(310) 712-6600

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.

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

The Second Amended and Restated Banc of California, Inc. 2018 Omnibus Stock Incentive Plan (the "Second A&R 2018 Plan") was approved by the Board of Directors of Banc of California, Inc., a Maryland corporation ("Banc of California"), on March 24, 2026, and by the stockholders of Banc of California on May 6, 2026. The Second A&R 2018 Plan supersedes and replaces the Amended and Restated Banc of California, Inc. 2018 Omnibus Stock Incentive Plan (the "A&R 2018 Plan"). Outstanding awards granted under the A&R 2018 Plan will remain in effect and be administered under the A&R 2018 Plan.

In addition, the Banc of California, Inc. Retirement Plan Committee approved an update to add employer securities as a voluntary investment option to the Banc of California, Inc. 401(k) Plan (the "401(k) Plan").

This registration statement on Form S-8 (this "Registration Statement") is being filed for the purpose of registering (i) 3,264,052 shares of common stock, par value $0.01 per share, of Banc of California ("Common Stock"), issuable pursuant to awards that may be granted under the Second A&R 2018 Plan, and (ii) 1,000,000 shares of Common Stock and an indeterminate amount of plan interests that may be offered or sold to participants in the 401(k) Plan.

PART I

INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

All information required by Part I to be contained in the prospectus is omitted from this Registration Statement in accordance with the provisions of Rule 428 under the Securities Act of 1933, as amended (the "Securities Act") and the introductory note to Part I of Form S-8. The documents containing the information specified in Part I will be delivered to participants as required by Rule 428(b)(1). These documents and the documents incorporated by reference into this Registration Statement pursuant to Part II, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

In this Registration Statement, as permitted by law, Banc of California "incorporates by reference" information from other documents that Banc of California files with the Securities and Exchange Commission (the "SEC"). This means that Banc of California can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus supplement and should be read with the same care.

The following documents filed (and excluding any documents or portions thereof furnished) with the SEC by Banc of California are hereby incorporated into this Registration Statement by reference:

In addition, all documents filed by Banc of California or the 401(k) Plan, as applicable, pursuant to Section 13(a), 13(c) 14 and 15(d) of the Exchange Act (other than those documents or portions of those documents that may be "furnished" and not filed with the SEC), subsequent to the effective date of this Registration Statement, prior to the filing of a post-effective amendment to this Registration Statement that indicates that all securities offered have been sold or that deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing of such documents.

Any statement contained in this Registration Statement or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained or incorporated by reference herein or in any subsequently filed document that is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

Not applicable.

Not applicable.

-2-

Section 2-405.2 of the Maryland General Corporation Law permits a Maryland corporation to include in its charter a provision limiting the liability of its directors and officers to the corporation or its stockholders for money damages except: (1) to the extent it is proven that the director or officer actually received an improper benefit or profit in money, property or services, for the amount of the benefit or profit in money, property or services actually received; or (2) to the extent that a judgment or other final adjudication adverse to the director or officer is entered in a proceeding based on a finding that the director's or officer's action or failure to act was the result of active and deliberate dishonesty and was material to the cause of action adjudicated in the proceeding. Banc of California's charter contains such a provision, thereby limiting the liability of its directors and officers to the maximum extent permitted by Maryland law.

Section 2-418 of the Maryland General Corporation Law permits a Maryland corporation to indemnify a director or officer who is made a party to any proceeding by reason of service in that capacity against judgments, penalties, fines, settlements and reasonable expenses actually incurred unless it is established that: (1) the act or omission of the director or officer was material to the matter giving rise to the proceeding and was committed in bad faith or was the result of active and deliberate dishonesty; (2) the director or officer actually received an improper personal benefit in money, property or services; or (3) in the case of a criminal proceeding, the director or officer had reasonable cause to believe that his or her conduct was unlawful. The Maryland General Corporation Law provides that where a director or officer is a defendant in a proceeding by or in the right of the corporation, the director or officer may not be indemnified if he or she is found liable to the corporation. The Maryland General Corporation Law also provides that a director or officer may not be indemnified in respect of any proceeding alleging improper personal benefit in which he or she was found liable on the grounds that personal benefit was improperly received. A director or officer found liable in a proceeding by or in the right of the corporation or in a proceeding alleging improper personal benefit may petition a court to nevertheless order indemnification of expenses if the court determines that the director or officer is fairly and reasonably entitled to indemnification in view of all the relevant circumstances.

Section 2-418 of the Maryland General Corporation Law provides that unless limited by the charter of a Maryland corporation, a director or an officer who is successful on the merits or otherwise in defense of any proceeding must be indemnified against reasonable expenses. Section 2-418 also provides that a Maryland corporation may advance reasonable expenses to a director or an officer upon the corporation's receipt of (a) a written affirmation by the director or officer of his or her good faith belief that he or she has met the standard of conduct necessary for indemnification by the corporation and (b) a written undertaking by the director or officer or on his or her behalf to repay the amount paid or reimbursed by the corporation if it is ultimately determined that the standard of conduct was not met.

Banc of California's charter provides for indemnification of directors and officers to the maximum extent permitted by the Maryland General Corporation Law. Additionally, Banc of California has entered into indemnification agreements with certain officers and directors of Banc of California, which supplement the indemnification provisions of Banc of California's charter by contractually obligating Banc of California to indemnify, and to advance expenses to, such persons to the fullest extent permitted by applicable law.

Under a directors' and officers' liability insurance policy, directors and officers of Banc of California are insured against certain liabilities.

Not applicable.

For the list of exhibits, see the Exhibit Index to this Registration Statement, which is incorporated into this item by reference.

Banc of California will submit or has submitted the 401(k) Plan and any amendment thereto to the Internal Revenue Service (the "IRS") in a timely manner and has made or will make all changes required by the IRS in order to qualify the 401(k) Plan under Section 401 of the Internal Revenue Code of 1986, as amended.

-3-

(a) The undersigned Registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement;

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) above shall not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by Banc of California pursuant to Section 13 or 15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of Banc of California's annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of Banc of California pursuant to the foregoing provisions, or otherwise, Banc of California has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by Banc of California of expenses incurred or paid by a director, officer or controlling person of Banc of California in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, Banc of California will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

-4-

EXHIBIT INDEX

*Filed herewith.

(1) Relates solely to shares of common stock of Banc of California, Inc. issuable pursuant to the Second Amended and Restated Banc of California, Inc. 2018 Omnibus Stock Incentive Plan. The shares of common stock of Banc of California, Inc. that may be offered or sold to participants in the Banc of California, Inc. 401(k) Plan will be purchased in open market transactions; because none of such shares will be original issuance securities, no opinion of counsel regarding the legality of such shares is required.

-5-

SIGNATURES

The Registrant. Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Santa Ana, State of California, on May 8, 2026.

BANC OF CALIFORNIA, INC.

POWER OF ATTORNEY

Each person whose signature appears below appoints Jared M. Wolff, Joseph Kauder and Ido Dotan, or either of them, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or would do in person, hereby ratifying and confirming all that said attorney-in fact and agent may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement and Power of Attorney has been signed by the following persons in the capacities and on the dates indicated.

-2-

-3-

The Plan. Pursuant to the requirements of the Securities Act of 1933, as amended, the trustees (or other persons who administer the employee benefit plan) have duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Santa Ana, State of California, on May 8, 2026.

-4-