[Form 4] California BanCorp \ CA Insider Trading Activity

Rhea-AI Filing Summary

California BanCorp EVP and Chief Risk Officer Martin Liska reported internal restructuring transactions involving 3,674 shares of California BanCorp common stock. The filing describes these as “other” transactions, with a footnote stating the shares were transferred to the reporting person’s living trust account, indicating an estate or ownership planning move rather than a market trade.

After these transfers, Liska directly holds 19,671 shares of common stock and indirectly holds 34,585 shares through the MACH4 Trust. No price was reported for the transfers, underscoring that this was a non-cash restructuring of how the shares are held, not a purchase or sale in the open market.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Liska Martin

Role EVP / Chief Risk Officer

Type	Security	Shares	Price	Value
Other	Common Stock	3,674	$0.00	--
Other	Common Stock	3,674	$0.00	--

Holdings After Transaction: Common Stock — 19,671 shares (Direct); Common Stock — 34,585 shares (Indirect, MACH4 Trust)

Footnotes (1)

1. [object Object]

Key Figures

Restructured shares per entry: 3,674 shares Total restructuring shares: 7,348 shares Direct holdings after transaction: 19,671 shares +3 more

6 metrics

Restructured shares per entry 3,674 shares Each transaction coded J on 2026-04-10

Total restructuring shares 7,348 shares transactionSummary restructuringShares

Direct holdings after transaction 19,671 shares total_shares_following_transaction for direct ownership

Indirect holdings after transaction 34,585 shares total_shares_following_transaction for MACH4 Trust

Reported transaction price $0.0000 per share both J-code restructuring entries

Restructuring transaction count 2 transactions transactionSummary restructuringCount

Key Terms

Form 4, transaction code J, indirect ownership, living trust account, +1 more

5 terms

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

transaction code J regulatory

""transaction_code": "J", "transaction_code_description": "Other acquisition or disposition""

indirect ownership financial

""direct_or_indirect": "I", "ownership_type": "indirect""

living trust account financial

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

restructuringShares financial

""restructuringShares": 7348"

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^*

Liska Martin

(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 Risk Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/10/2026

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	04/10/2026		J(1)		3,674	D	$0.00	19,671	D
Common Stock	04/10/2026		J(1)		3,674	A	$0.00	34,585	I	MACH4 Trust

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 Martin Liska	04/10/2026
	** 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)