California BanCorp (BCAL) COO surrenders 115 shares for tax withholding

Rhea-AI Filing Summary

California BanCorp EVP and COO Michelle Wirfel reported a small tax-related share disposition. On the vesting of a previously granted award, 115 shares of California BanCorp common stock were disposed of at $18.92 per share to cover her tax liability. After this non‑market, tax-withholding transaction, she holds 87,882.93 shares directly.

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	115	$18.92	$2K

Holdings After Transaction: Common Stock — 87,882.93 shares (Direct, null)

Footnotes (1)

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Key Figures

Tax-withholding shares: 115 shares Transaction price: $18.92 per share Post-transaction holdings: 87,882.93 shares

3 metrics

Tax-withholding shares 115 shares Disposed to satisfy tax liability on vesting

Transaction price $18.92 per share Value used for tax-withholding disposition

Post-transaction holdings 87,882.93 shares Directly held by Michelle Wirfel after transaction

Key Terms

tax-withholding disposition, vesting, 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.

vesting financial

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

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

previously granted award financial

"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)
04/28/2026

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	04/28/2026		F(1)		115	D	$18.92	87,882.93	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	04/30/2026
	** 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 did BCAL executive Michelle Wirfel report in this Form 4 filing?

Michelle Wirfel, EVP and Chief Operating Officer of California BanCorp (BCAL), reported a small tax-withholding disposition. 115 common shares were surrendered upon vesting of a prior award to cover taxes, leaving her with 87,882.93 directly held shares.

Was the BCAL Form 4 transaction an open-market sale of shares?

No, the BCAL Form 4 reflects a tax-withholding disposition, not an open-market sale. Shares were disposed of to satisfy Michelle Wirfel’s tax liability triggered by vesting of a previously granted equity award, according to the filing’s explanatory footnote.

How many California BanCorp shares were involved in Michelle Wirfel’s tax withholding?

The Form 4 shows 115 BCAL common shares were disposed of for tax withholding. These shares were used to satisfy taxes arising from the vesting of an earlier equity award rather than being sold in the open market to outside investors.

At what price were the BCAL shares valued in the tax-withholding transaction?

The tax-withholding disposition valued the 115 California BanCorp (BCAL) shares at $18.92 per share. This per-share figure is disclosed in the Form 4 as the transaction price used in calculating the value of the shares surrendered for tax purposes.

How many BCAL shares does Michelle Wirfel hold after this Form 4 event?

Following the tax-withholding disposition, Michelle Wirfel directly holds 87,882.93 BCAL common shares. This post-transaction holding figure, reported in the Form 4, helps investors gauge the relative size and routine nature of the tax-related share surrender.

What is the meaning of code “F” in the BCAL Form 4 transaction?

In this BCAL Form 4, transaction code “F” denotes a tax-withholding disposition. It indicates shares were delivered back to the issuer to pay the exercise price or satisfy tax liabilities associated with equity compensation, rather than being actively sold on the market.