Michael B. Luu

CIK: 0001583179

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)2 (6.7%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)5 (16.7%)

Compensation grants

Other (G, F, J, C, D, …)23 (76.7%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

CWT

CALIFORNIA WATER SERVICE GROUP

Officer

Discretionary Trading P&L

Holdings

Transaction History (30 total)

CWT
CALIFORNIA WATER SERVICE GROUP
Sep 5, 2026
Tax Payment(F)
Direct
68 shares at avg. $50.03$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Sep 4, 2026
Tax Payment(F)
Direct
70 shares at avg. $50.03$4K
CWT
CALIFORNIA WATER SERVICE GROUP
Jun 5, 2026
Tax Payment(F)
Direct
69 shares at avg. $45.82$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Jun 4, 2026
Tax Payment(F)
Direct
70 shares at avg. $45.24$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 20, 2026
Sale(S)
Direct
740 shares at avg. $44.53$33K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2026
Tax Payment(F)
Direct
115 shares at avg. $45.59$5K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2026
Tax Payment(F)
Direct
59 shares at avg. $45.59$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2026
Award(A)
Direct
205 shares-
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2026
Award(A)
Direct
900 shares-
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2026
Tax Payment(F)
Direct
504 shares at avg. $45.59$23K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 5, 2026
Tax Payment(F)
Direct
76 shares at avg. $45.78$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 4, 2026
Tax Payment(F)
Direct
309 shares at avg. $46.99$15K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 3, 2026
Award(A)
Direct
1.7K shares-
CWT
CALIFORNIA WATER SERVICE GROUP
Dec 7, 2025
Disposition(D)
Direct
54 shares at avg. $44.88$2K
CWT
CALIFORNIA WATER SERVICE GROUP
Dec 5, 2025
Tax Payment(F)
Direct
69 shares at avg. $44.88$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Sep 7, 2025
Tax Payment(F)
Direct
54 shares at avg. $47.09$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Sep 5, 2025
Tax Payment(F)
Direct
69 shares at avg. $47.09$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Jun 7, 2025
Tax Payment(F)
Direct
54 shares at avg. $45.62$2K
CWT
CALIFORNIA WATER SERVICE GROUP
Jun 5, 2025
Tax Payment(F)
Direct
67 shares at avg. $45.85$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 7, 2025
Tax Payment(F)
Direct
54 shares at avg. $47.90$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 5, 2025
Tax Payment(F)
Direct
270 shares at avg. $46.65$13K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 4, 2025
Award(A)
Direct
1.7K shares-
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 3, 2025
Award(A)
Direct
1.8K shares-
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 3, 2025
Tax Payment(F)
Direct
60 shares at avg. $45.45$3K
CWT
CALIFORNIA WATER SERVICE GROUP
Mar 3, 2025
Tax Payment(F)
Direct
1K shares at avg. $45.45$46K

		Type	Shares	Price		Ownership
Sep 5, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	68	$50.03	$3,402	Direct
Sep 4, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	70	$50.03	$3,502	Direct
Jun 5, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	69	$45.82	$3,162	Direct
Jun 4, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	70	$45.24	$3,167	Direct
Mar 20, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Sale(S)	740	$44.53	$32,945	Direct
Mar 7, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	115	$45.59	$5,243	Direct
Mar 7, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	59	$45.59	$2,690	Direct
Mar 7, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Award(A)	205	-	$0	Direct
Mar 7, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Award(A)	900	-	$0	Direct
Mar 7, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	504	$45.59	$22,977	Direct
Mar 5, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	76	$45.78	$3,479	Direct
Mar 4, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	309	$46.99	$14,520	Direct
Mar 3, 2026	CWT CALIFORNIA WATER SERVICE GROUP	Award(A)	1,650	-	$0	Direct
Dec 7, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Disposition(D)	54	$44.88	$2,424	Direct
Dec 5, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	69	$44.88	$3,097	Direct
Sep 7, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	54	$47.09	$2,543	Direct
Sep 5, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	69	$47.09	$3,249	Direct
Jun 7, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	54	$45.62	$2,463	Direct
Jun 5, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	67	$45.85	$3,072	Direct
Mar 7, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	54	$47.90	$2,587	Direct
Mar 5, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	270	$46.65	$12,596	Direct
Mar 4, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Award(A)	1,653	-	-	Direct
Mar 3, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Award(A)	1,814	-	-	Direct
Mar 3, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	60	$45.45	$2,727	Direct
Mar 3, 2025	CWT CALIFORNIA WATER SERVICE GROUP	Tax Payment(F)	1,014	$45.45	$46,086	Direct

1-25 of 30 transactions

About Luu Michael B

Luu Michael B (SEC CIK 0001583179) files insider reports with the SEC as SVP Corp Svce & Chief Risk Of of CALIFORNIA WATER SERVICE GROUP (CWT).

Signal8 holds 17 ownership filings by Luu Michael B, all Form 4s, filed between Sep 3, 2024 and Sep 8, 2026. Those filings report 30 transactions, from Sep 3, 2024 to Sep 5, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Luu Michael B's filings is in SAN JOSE, CA.

Recent filings by Luu Michael B

Sep 5, 2026: Tax withholding of CWT shares (Form 4, code F).
Sep 4, 2026: Tax withholding of CWT shares (Form 4, code F).
Jun 5, 2026: Tax withholding of CWT shares (Form 4, code F).
Jun 4, 2026: Tax withholding of CWT shares (Form 4, code F).
Mar 20, 2026: Open-market sale of CWT shares (Form 4, code S).

Other insiders filing for CALIFORNIA WATER SERVICE GROUP (CWT)

Scanlon Thomas A, VP, Corporate Controller & PAO
Peters Todd Kenneth, Vice President, Engineering
Ouyang Elissa Y, VP Facilities Fleet Procure IT
Mortensen Michelle R, VP Corp Sect, Gov & Assurance
Mares Michael S JR, SVP Operations
Lynch James Patrick, SVP CFO and Treasurer

How to read Form 4 transaction codes