# EDGAR Filing Document

**Accession Number:** 0001795815
**File Stem:** 0001562180-25-005640
**Filing Date:** 2025-8
**Character Count:** 9130
**Document Hash:** 453b98c833f42ed7c57e73a126b40ee9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001562180-25-005640.hdr.sgml**: 20250804

**ACCESSION NUMBER**: 0001562180-25-005640

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250802

**FILED AS OF DATE**: 20250804

**DATE AS OF CHANGE**: 20250804

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Rainer David I
- **CENTRAL INDEX KEY:** 0001555186

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41684
- **FILM NUMBER:** 251182127

**MAIL ADDRESS:**
- **STREET 1:** C/O CU BANCORP
- **STREET 2:** 15821 VENTURA BOULEVARD, SUITE 100
- **CITY:** ENCINO
- **STATE:** CA
- **ZIP:** 91436
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** California BanCorp \ CA
- **CENTRAL INDEX KEY:** 0001795815
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 843288397
- **STATE OF INCORPORATION:** CA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 12265 EL CAMINO REAL, SUITE 100
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130
- **BUSINESS PHONE:** 858-847-4787

**MAIL ADDRESS:**
- **STREET 1:** 12265 EL CAMINO REAL, SUITE 100
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Southern California Bancorp \ CA
- **DATE OF NAME CHANGE:** 20191204

## Ex-24

```

POWER OF ATTORNEY
The undersigned hereby constitutes and appoints each of Jean Carandang,
Tom Dolan, and Manisha K. Merchant, or any of them signing singly, the
undersigned's true and lawful attorney-infact (with full power of substitution
and revocation in each) to:
1. Execute for and on behalf of the undersigned, any and all statements and
reports required or permitted to be filed by the undersigned, in any and all
capacities, under Section 16 ( a) of the Securities Exchange Act of 1934,
as amended, and the rules promulgated thereunder (the "Act") with respect to
the beneficial ownership of the securities of California BanCorp
(the "Company"), including without limitation Forms 3, 4, and 5; .
2. Do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such statements and
reports and file such statements and reports, with all amendments, supplements,
and exhibits thereto, with the Securities and Exchange Commission, and/or any
stock exchange or similar authority and to deliver copies thereof to the
Company; and
3. Take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on beha~f of
the undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may approve
such attorney-in-fact's discretion. The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and perform any and every act
and thing whatsoever requisite, necessary or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents
and purposes as the undersigned might or could do if personally present, with
full power of substitution or revocation, and hereby ratifies and confirms all
that such attorney-in-fact, shall lawfully do or cause to be done by virtue of
this Power of Attorney. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.
In the event that any attorney-in-fact appointed hereunder is no longer
employed by the Company or its affiliates, the Power of Attorney and all
authority conferred hereby shall be immediately terminated with respect to such
attorney-in-fact. This Power of Attorney shall otherwise remain in full force
and effect until the undersigned is no longer required to file statements and
reports under Section 16 (a) of the Act with respect to holdings of and
transactions in securities issued by the Company, unless earlier revoked by
the undersigned in a signed writing delivered to the foregoing attorneys-in-
fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 21 day of May 2025
By:/s/  rainerdavid
Name:  rainerdavid

```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Rainer David I<br><sub>(Last) (First) (Middle)</sub><br>C/O CALIFORNIA BANCORP<br>355 S. GRAND AVE STE 1200<br><sub>(Street)</sub><br>LOS ANGELES, CA 90071<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-02 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Executive Chairman_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>California BanCorp \ CA [ BCAL ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-08-02 |  | F<sup>(1)</sup> |  | 3508.00 | D | $14.60 | 200004.00 | D |  |
| Common Stock |  |  |  |  |  |  |  | 329124.00 | I | DAVID AND ANNE RAINER TRUST U/A DTD 05/07/1997 |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Shares disposed to satisfy the Reporting Person's tax liability by the vesting of a previously granted award.

**Signature:** Manisha Merchant, by POA for Rainer David  
**Date:** 2025-08-04

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**