Tax withholding trims California BanCorp (BCAL) COO share holdings

Rhea-AI Filing Summary

California BanCorp EVP and Chief Operating Officer Michelle Wirfel reported a tax-related share disposition. On the vesting of a previously granted award, 595 shares of common stock were delivered at $17.55 per share to satisfy her tax liability. After this non-market tax-withholding event, she directly holds 88,151.93 shares of common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Wirfel Michelle

Role EVP, Chief Operating Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	595	$17.55	$10K

Holdings After Transaction: Common Stock — 88,151.93 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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
Estimated average burden
hours per response:			0.5

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^*

Wirfel Michelle

(Last) (First) (Middle)

C/O CALIFORNIA BANCORP

355 S. GRAND AVE STE 1200

(Street)

LOS ANGELES CALIFORNIA 90071

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2026

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

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

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

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	03/25/2026		F(1)		595	D	$17.55	88,151.93	D

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

Remarks:

	Manisha Merchant, by POA for Michele Wirfel	03/26/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did California BanCorp (BCAL) report for Michelle Wirfel?

California BanCorp reported that EVP and Chief Operating Officer Michelle Wirfel disposed of 595 common shares. The shares were delivered to cover taxes due on the vesting of a previously granted equity award, rather than sold on the open market.

Was the BCAL insider transaction by Michelle Wirfel an open-market sale?

No, the transaction was not an open-market sale. The 595 California BanCorp common shares were disposed of to satisfy Michelle Wirfel’s tax liability arising from the vesting of a prior stock award, as described in the Form 4 footnote.

How many California BanCorp (BCAL) shares does Michelle Wirfel hold after this Form 4 filing?

Following the tax-withholding disposition, Michelle Wirfel directly holds 88,151.93 California BanCorp common shares. This figure reflects her position after 595 shares were delivered to satisfy tax obligations tied to a previously granted equity award.

What does transaction code "F" indicate in the BCAL Form 4 for Michelle Wirfel?

Transaction code “F” indicates shares were used to pay an exercise price or tax liability. In this case, 595 California BanCorp common shares were delivered to cover Michelle Wirfel’s tax obligations from the vesting of a prior stock-based award.

What price per share was used for Michelle Wirfel’s tax-withholding disposition at California BanCorp (BCAL)?

The tax-withholding disposition used a price of $17.55 per California BanCorp common share. At this price, 595 shares were delivered to satisfy Michelle Wirfel’s tax liability created by the vesting of a previously granted equity award.