California BanCorp (BCAL) COO logs routine tax-withholding share disposition

Rhea-AI Filing Summary

California BanCorp EVP and COO Michelle Wirfel reported a routine tax-related share disposition. She disposed of 154 shares of Common Stock at $18.38 per share to satisfy tax liabilities from a previously vested equity award. After this transaction, she directly holds 87,997.93 shares of California BanCorp 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	154	$18.38	$3K

Holdings After Transaction: Common Stock — 87,997.93 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Shares disposed for tax: 154 shares Disposition price per share: $18.38 per share Shares held after transaction: 87,997.93 shares

3 metrics

Shares disposed for tax 154 shares Tax-withholding disposition on Common Stock

Disposition price per share $18.38 per share Price for tax-withholding share disposition

Shares held after transaction 87,997.93 shares Direct Common Stock holdings following Form 4 transaction

Key Terms

tax-withholding disposition, Payment of exercise price or tax liability by delivering securities, vesting of a previously granted award

3 terms

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Payment of exercise price or tax liability by delivering securities financial

"transaction_code_description: "Payment of exercise price or tax liability by delivering""

vesting of a previously granted award financial

"footnote: "tax liability by the vesting of a previously granted award""

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)
04/12/2026

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	04/12/2026		F(1)		154	D	$18.38	87,997.93	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	04/13/2026
	** 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 COO Michelle Wirfel disposed of 154 shares of Common Stock. The transaction was a tax-withholding disposition tied to the vesting of a previously granted equity award, rather than an open-market trade or discretionary sale of shares.

Why did Michelle Wirfel dispose of California BanCorp (BCAL) shares?

Michelle Wirfel disposed of 154 California BanCorp shares to satisfy her tax liability from the vesting of a prior stock award. The Form 4 classifies this as a tax-withholding disposition, meaning shares were delivered to cover taxes owed on compensation, not sold in the open market.

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

After the reported tax-withholding disposition, Michelle Wirfel directly holds 87,997.93 shares of California BanCorp Common Stock. This figure reflects her position following the 154-share disposition made to satisfy tax obligations related to the vesting of a previously granted equity award.

Was the California BanCorp (BCAL) Form 4 transaction an open-market sale?

No, the transaction was not an open-market sale. The Form 4 uses code F and describes it as a tax-withholding disposition, where 154 shares were delivered to satisfy tax liabilities arising from the vesting of an earlier stock-based compensation award granted to Michelle Wirfel.

What does transaction code F mean in the California BanCorp (BCAL) Form 4?

Transaction code F indicates payment of an exercise price or tax liability by delivering securities. In this case, 154 California BanCorp Common Stock shares were disposed of to cover Michelle Wirfel’s tax obligations tied to a vested award, rather than representing a discretionary buy or sell decision.