LIVE FROM THE DATABASETRANSACTIONS 362,430COMPANIES 5,763LATEST TRADE Oct 16UPDATED Oct 17, 12:31 AM
CWTCIK 0001035201

CALIFORNIA WATER SERVICE GROUP

174 transactions by 25 insiders, from December 5, 2025 to September 5, 2026.

Transactions
17425 insiders
Bought · P
$24Kopen market
Sold · S
$664Kopen market
Net
−$641Knet selling

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
Michael B. LuuChief15——$33K
Michael S. Mares Jr.SVP13——$171K
Michelle R. MortensenVP13——$40K
Martin A. KropelnickiCEO13———
Kenneth G. JenkinsVP12———
Sophie Marwieh JamesVP12———
Shannon C. DeanChief12———
Thomas A. ScanlonCAO12———
Elissa Y. OuyangVP12———
Shawn C. BuntingGC12———
Todd Kenneth PetersPres10———
Greg A. MillemanVP10———
James Patrick LynchCFO9—$24K—
Kristan A. HamnerChief4———
Thomas M. KrummelDir3——$347K
Lester A. SnowDir3——$74K
Gregory Dale ShimanskyVP1———
Charles R. PattonDir1———
Gregory E. AliffDir1———
Patricia K. WagnerDir1———
Carol M. PottengerDir1———
Shelly Marian EsqueDir1———
Yvonne Aida MaldonadoDir1———
Jeffrey KightlingerDir1———
Scott L. MorrisDir1———

All transactions

174 in total, newest filings first.

InsiderDateCodeSharesPriceValue
Thomas A. ScanlonCAOSep 5F30$50.03$2K
Thomas A. ScanlonCAOSep 4F30$50.03$2K
Todd Kenneth PetersPresSep 5F40$50.03$2K
Todd Kenneth PetersPresSep 4F41$50.03$2K
Elissa Y. OuyangVPSep 5F66$50.03$3K
Elissa Y. OuyangVPSep 4F68$50.03$3K
Michelle R. MortensenVPSep 5F73$50.03$4K
Michelle R. MortensenVPSep 4F75$50.03$4K
Michael S. Mares Jr.SVPSep 5F67$50.03$3K
Michael S. Mares Jr.SVPSep 4F69$50.03$3K
James Patrick LynchCFOSep 5F48$50.03$2K
James Patrick LynchCFOSep 4F50$50.03$3K
Michael B. LuuChiefSep 5F68$50.03$3K
Michael B. LuuChiefSep 4F70$50.03$4K
Martin A. KropelnickiCEOSep 5F493$50.03$25K
Martin A. KropelnickiCEOSep 4F505$50.03$25K
Kenneth G. JenkinsVPSep 5F38$50.03$2K
Kenneth G. JenkinsVPSep 4F64$50.03$3K
Sophie Marwieh JamesVPSep 5F50$50.03$3K
Sophie Marwieh JamesVPSep 4F51$50.03$3K
Kristan A. HamnerChiefSep 4F42$50.03$2K
Shannon C. DeanChiefSep 5F72$50.03$4K
Shannon C. DeanChiefSep 4F75$50.03$4K
Shawn C. BuntingGCSep 5F69$50.03$3K
Shawn C. BuntingGCSep 4F71$50.03$4K
Lester A. SnowDirSep 1S500$50.21$25K
Thomas M. KrummelDirAug 13S3,700$50.37$186K
Gregory Dale ShimanskyVPAug 4A446$0.00—
Kristan A. HamnerChiefJun 4F41$45.24$2K
Sophie Marwieh JamesVPJun 5F50$45.82$2K
Sophie Marwieh JamesVPJun 4F51$45.24$2K
Kenneth G. JenkinsVPJun 5F38$45.82$2K
Kenneth G. JenkinsVPJun 4F63$45.24$3K
Todd Kenneth PetersPresJun 5F40$45.82$2K
Todd Kenneth PetersPresJun 4F40$45.24$2K
Thomas A. ScanlonCAOJun 5F30$45.82$1K
Thomas A. ScanlonCAOJun 4F30$45.24$1K
Michael S. Mares Jr.SVPJun 5F68$45.82$3K
Michael S. Mares Jr.SVPJun 4F69$45.24$3K
Greg A. MillemanVPJun 5F66$45.82$3K
Greg A. MillemanVPJun 4F67$45.24$3K
Elissa Y. OuyangVPJun 5F66$45.82$3K
Elissa Y. OuyangVPJun 4F67$45.24$3K
Shannon C. DeanChiefJun 5F73$45.82$3K
Shannon C. DeanChiefJun 4F74$45.24$3K
Michelle R. MortensenVPJun 5F73$45.82$3K
Michelle R. MortensenVPJun 4F74$45.24$3K
Michael B. LuuChiefJun 5F69$45.82$3K
Michael B. LuuChiefJun 4F70$45.24$3K
James Patrick LynchCFOJun 5F49$45.82$2K
James Patrick LynchCFOJun 4F49$45.24$2K
Martin A. KropelnickiCEOJun 5F493$45.82$23K
Martin A. KropelnickiCEOJun 4F504$45.24$23K
Shawn C. BuntingGCJun 5F69$45.82$3K
Shawn C. BuntingGCJun 4F70$45.24$3K
Lester A. SnowDirMay 27S1,100$44.00$48K
Thomas M. KrummelDirMay 21S3,700$43.30$160K
Michael B. LuuChiefMar 20S740$44.53$33K
Michael S. Mares Jr.PresMar 20S3,892$44.00$171K
Sophie Marwieh JamesVPMar 7F27$45.59$1K
Sophie Marwieh JamesVPMar 7F232$45.59$11K
Sophie Marwieh JamesVPMar 7A548$0.00—
Sophie Marwieh JamesVPMar 5F57$45.78$3K
Kenneth G. JenkinsVPMar 7F33$45.59$2K
Kenneth G. JenkinsVPMar 7F281$45.59$13K
Kenneth G. JenkinsVPMar 7A548$0.00—
Kenneth G. JenkinsVPMar 5F42$45.78$2K
Todd Kenneth PetersPresMar 7F34$45.59$2K
Todd Kenneth PetersPresMar 7F296$45.59$13K
Todd Kenneth PetersPresMar 7A548$0.00—
Todd Kenneth PetersPresMar 5F44$45.78$2K
Thomas A. ScanlonCAOMar 7F26$45.59$1K
Thomas A. ScanlonCAOMar 7F226$45.59$10K
Thomas A. ScanlonCAOMar 7A548$0.00—
Thomas A. ScanlonCAOMar 5F34$45.78$2K
Michael S. Mares Jr.SVPMar 7F58$45.59$3K
Michael S. Mares Jr.SVPMar 7F495$45.59$23K
Michael S. Mares Jr.SVPMar 7A900$0.00—
Michael S. Mares Jr.SVPMar 5F75$45.78$3K
Greg A. MillemanVPMar 7F57$45.59$3K
Greg A. MillemanVPMar 7F486$45.59$22K
Greg A. MillemanVPMar 7A900$0.00—
Greg A. MillemanVPMar 5F73$45.78$3K
Elissa Y. OuyangVPMar 7F57$45.59$3K
Elissa Y. OuyangVPMar 7F488$45.59$22K
Elissa Y. OuyangVPMar 7A900$0.00—
Elissa Y. OuyangVPMar 5F74$45.78$3K
Shannon C. DeanChiefMar 7F62$45.59$3K
Shannon C. DeanChiefMar 7F531$45.59$24K
Shannon C. DeanChiefMar 7A900$0.00—
Shannon C. DeanChiefMar 5F80$45.78$4K
Michelle R. MortensenChiefMar 7F63$45.59$3K
Michelle R. MortensenChiefMar 7F534$45.59$24K
Michelle R. MortensenChiefMar 7A900$0.00—
Michelle R. MortensenChiefMar 5F80$45.78$4K
Michael B. LuuChiefMar 7F59$45.59$3K
Michael B. LuuChiefMar 7F115$45.59$5K
Michael B. LuuChiefMar 7A205$0.00—
Michael B. LuuChiefMar 7F504$45.59$23K
Michael B. LuuChiefMar 7A900$0.00—
Michael B. LuuChiefMar 5F76$45.78$3K
James Patrick LynchCFOMar 5F56$45.78$3K
Martin A. KropelnickiCEOMar 7F385$45.59$18K
Martin A. KropelnickiCEOMar 7F3,817$45.59$174K
Martin A. KropelnickiCEOMar 7A6,507$0.00—
Martin A. KropelnickiCEOMar 5F493$45.78$23K
Shawn C. BuntingGCMar 7F49$45.59$2K
Shawn C. BuntingGCMar 7F422$45.59$19K
Shawn C. BuntingGCMar 7A750$0.00—
Shawn C. BuntingGCMar 5F76$45.78$3K
Kristan A. HamnerChiefMar 4F190$46.99$9K
Kristan A. HamnerChiefMar 3A1,650$0.00—
Jeffrey KightlingerDirMar 3A2,816$0.00—
Sophie Marwieh JamesVPMar 4F233$46.99$11K
Sophie Marwieh JamesVPMar 3A1,650$0.00—
Kenneth G. JenkinsVPMar 4F283$46.99$13K
Kenneth G. JenkinsVPMar 3A1,650$0.00—
Todd Kenneth PetersPresMar 4F179$46.99$8K
Todd Kenneth PetersPresMar 3A1,650$0.00—
Thomas A. ScanlonCAOMar 4F137$46.99$6K
Thomas A. ScanlonCAOMar 3A1,650$0.00—
Yvonne Aida MaldonadoDirMar 3A2,816$0.00—
Michael S. Mares Jr.SVPMar 4F303$46.99$14K
Michael S. Mares Jr.SVPMar 3A1,650$0.00—
Greg A. MillemanVPMar 4F298$46.99$14K
Greg A. MillemanVPMar 3A1,650$0.00—
Shelly Marian EsqueDirMar 3A2,816$0.00—
Carol M. PottengerDirMar 3A2,816$0.00—
Elissa Y. OuyangVPMar 4F299$46.99$14K
Elissa Y. OuyangVPMar 3A1,650$0.00—
Patricia K. WagnerDirMar 3A2,816$0.00—
Shannon C. DeanChiefMar 4F325$46.99$15K
Shannon C. DeanChiefMar 3A1,650$0.00—
Michelle R. MortensenChiefMar 4F327$46.99$15K
Michelle R. MortensenChiefMar 3A1,650$0.00—
Michael B. LuuChiefMar 4F309$46.99$15K
Michael B. LuuChiefMar 3A1,650$0.00—
Lester A. SnowDirMar 3A2,816$0.00—
James Patrick LynchCFOMar 4F226$46.99$11K
James Patrick LynchCFOMar 3A1,650$0.00—
Thomas M. KrummelDirMar 3A2,816$0.00—
Charles R. PattonDirMar 3A2,816$0.00—
Martin A. KropelnickiCEOMar 4F2,017$46.99$95K
Martin A. KropelnickiCEOMar 3A10,295$0.00—
Scott L. MorrisDirMar 3A2,816$0.00—
Shawn C. BuntingGCMar 4F310$46.99$15K
Shawn C. BuntingGCMar 3A1,650$0.00—
Gregory E. AliffDirMar 3A2,816$0.00—
Michelle R. MortensenChiefDec 23S924$43.34$40K
James Patrick LynchCFODec 10P550$42.80$24K
Sophie Marwieh JamesVPDec 7F24$44.88$1K
Sophie Marwieh JamesVPDec 5F50$44.88$2K
Kenneth G. JenkinsVPDec 7F29$44.88$1K
Kenneth G. JenkinsVPDec 5F38$44.88$2K
Thomas A. ScanlonCAODec 7F23$44.88$1K
Thomas A. ScanlonCAODec 5F29$44.88$1K
Michael S. Mares Jr.SVPDec 7F53$44.88$2K
Michael S. Mares Jr.SVPDec 5F67$44.88$3K
Greg A. MillemanVPDec 7F51$44.88$2K
Greg A. MillemanVPDec 5F66$44.88$3K
Elissa Y. OuyangVPDec 7F52$44.88$2K
Elissa Y. OuyangVPDec 5F66$44.88$3K
Shannon C. DeanChiefDec 7F57$44.88$3K
Shannon C. DeanChiefDec 5F73$44.88$3K
Michelle R. MortensenChiefDec 7F57$44.88$3K
Michelle R. MortensenChiefDec 5F73$44.88$3K
Michael B. LuuChiefDec 7D54$44.88$2K
Michael B. LuuChiefDec 5F69$44.88$3K
James Patrick LynchCFODec 5F48$44.88$2K
Martin A. KropelnickiCEODec 7F385$44.88$17K
Martin A. KropelnickiCEODec 5G3,000$0.00—
Martin A. KropelnickiCEODec 5F492$44.88$22K
Shawn C. BuntingGCDec 7F45$44.88$2K
Shawn C. BuntingGCDec 5F69$44.88$3K