California BanCorp (BCAL) chair reports gift and trust transfer of shares

Rhea-AI Filing Summary

California BanCorp Executive Chairman and Director David Rainer reported changes in his California BanCorp common stock holdings. On 12/09/2025, a trust associated with him reported a gift of 2,000 shares, leaving 320,824 shares held indirectly through the David and Anne Rainer Trust U/A DTD 05/07/1997. On 12/15/2025, 110,523 shares were moved from his direct ownership to the trust, described as a transfer to the reporting person's living trust account, reducing his direct holdings to 56,577 shares and increasing his indirect holdings to 431,347 shares. All transactions were reported at a price of $0.00, indicating gifts and internal transfers rather than market purchases or sales.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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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^*

Rainer David I

(Last) (First) (Middle)

C/O CALIFORNIA BANCORP

355 S. GRAND AVE STE 1200

(Street)

LOS ANGELES CA 90071

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
California BanCorp \ CA [ BCAL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Chairman

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/09/2025		G	V	2,000	D	$0.00	320,824	I	DAVID AND ANNE RAINER TRUST U/A DTD 05/07/1997
Common Stock	12/15/2025		J(1)		110,523	D	$0.00	56,577	D
Common Stock	12/15/2025		J(1)		110,523	A	$0.00	431,347	I	DAVID AND ANNE RAINER TRUST U/A DTD 05/07/1997

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares transferred to the Reporting Person's living trust account.

Remarks:

	Manisha Merchant, by POA for David Rainer	12/15/2025
	** Signature of Reporting Person	Date
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.

FAQ

What insider activity did California BanCorp (BCAL) report in this filing?

The filing reports that Executive Chairman and Director David Rainer changed his California BanCorp common stock holdings through a 2,000-share gift and an internal transfer of 110,523 shares to his living trust.

How many California BanCorp shares were gifted by the insider?

On 12/09/2025, a trust associated with David Rainer reported a gift of 2,000 shares of California BanCorp common stock, leaving 320,824 shares held indirectly through the David and Anne Rainer Trust U/A DTD 05/07/1997.

What was the purpose of the 110,523-share transaction reported for BCAL?

On 12/15/2025, 110,523 shares of California BanCorp common stock were transferred from David Rainer's direct ownership to his living trust, as explained in the note that the shares were transferred to the reporting person's living trust account.

What are David Rainer’s direct and indirect California BanCorp holdings after these transactions?

Following the reported transactions, David Rainer held 56,577 shares of California BanCorp common stock directly and 431,347 shares indirectly through the David and Anne Rainer Trust U/A DTD 05/07/1997.

Were these California BanCorp insider transactions market trades?

No. All reported transactions were recorded at a price of $0.00, indicating that they were a gift and internal transfers between David Rainer's direct holdings and his living trust, not open-market purchases or sales.

What position does the reporting person hold at California BanCorp (BCAL)?

The reporting person is identified as both a Director and an Officer of California BanCorp, with the officer title of Executive Chairman.