Then. Now. Next.

Celebrating 100 years.

Historical black-and-white photograph of two workers welding a large water main pipeline inside a deep earthen trench, circa early 20th century
Workers welding a water main, early 20th century. Representing Cal Water's century of expertise.
California Water Service Group  |  Summary Annual Report 2025
Historical black-and-white photograph of a Cal Water employee inside a large water main, reading blueprints by flashlight
Cal Water employee inspecting a water main, historical archive photograph.

California Water Service Group

California Water Service Group (NYSE: CWT) is the third-largest publicly traded water utility in the United States, providing high-quality water and wastewater services to more than two million people through four regulated subsidiaries: California Water Service (Cal Water), Hawaii Water Service (Hawaii Water), New Mexico Water Service (New Mexico Water), and Washington Water Service (Washington Water). A fifth subsidiary, Texas Water Service (TWSC, Inc.), invests in water and wastewater infrastructure in Texas.

We are committed to improving the quality of life for our customers, communities, employees, and stockholders. We do this by living our core values and delivering on our promise to provide quality, service, and value.

Historical black-and-white photograph of pipeline construction with children watching a crane
Red industrial water valve and piping

Through the years, we have contributed to the greater good by delivering a reliable, affordable, high-quality water supply, regardless of the obstacles we have faced. This expertise, this tenacity—together with our commitment to enhancing the quality of life for our customers, communities, employees, and stockholders—not only distinguishes our past but foreshadows our future.

Unwavering commitment to water safety

Safe water sustains life. There is no higher calling than protecting our water supplies, thereby contributing to the health, safety, and well-being of our communities. Throughout our history, we have demonstrated our commitment to providing a safe, reliable, affordable water supply. And although these efforts go largely unseen by the public, they are part of the legacy that will

take us into
the future.

Responding proactively
to evolving standards

1974

The first law of its kind, the Safe Drinking Water Act provides a comprehensive framework for regulating the quality of the nation's drinking water supplies and authorizes the United States Environmental Protection Agency to set standards to protect public health. Cal Water begins designing treatment facilities needed to meet new standards.

President Gerald Ford signing the Safe Drinking Water Act into law in 1974, establishing the federal framework for drinking water quality standards
President Ford signs the Safe Drinking Water Act, 1974
Cal Water operations employee collecting a water sample to check chlorine residual, with a rainbow trout in front representing aquatic life protected by Cal Water's dechlorination invention

RIGHT Operations employee collects water sample to check chlorine residual.

ABOVE Our patented dechlorination invention protects fish like this Rainbow Trout.

Adding and removing chlorine
to keep everyone safe

1994

In just one of several water quality-related accomplishments in 1994, the Company voluntarily installs chlorinators on all of its California wells to reduce the risk of bacteriological contamination. It also completes an innovative treatment system in Bakersfield to improve taste and odor and another in Chico to remove volatile organic compounds.

Protecting infrastructure
from attacks

1941

Cal Water prepares for enemy attacks

Cal Water works with the Office of Civilian Defense and other government agencies to safeguard water supplies from enemy attacks. It blacks out windows, adds telephones that connect directly to local Civilian Defense Headquarters, and establishes lines of communication with employees. Practice tests and authentic alerts confirm the efficacy of wartime preparations.

Two women installing blackout curtains on a window ladder during WWII
BLACKOUT means BLACK vintage WWII poster

Left Vintage poster reminds the public of the importance of blackouts during WWII; concerned citizens cover windows.

Community
support through
good times
and bad

For us, community support takes many forms. It’s effectively preparing for and responding to emergencies. It’s doing what we can to help people through difficult times. It’s keeping the water flowing when disaster strikes. It’s supporting the people and organizations that share our commitment to improving the quality of life. Doing all of this has helped us thrive in the past, and it will help us

thrive well
into the
future.

Contributing to
the greater good

2019

Cal Water launches its Firefighter Grant Program, open to all uniformed professional or volunteer fire departments in its service areas, as a demonstration of its commitment to — and partnership with — local firefighters. In its first year, the program provides funding for fire hoses, turnout gear, helmets, a fire detection and monitoring system, and a hydraulic emergency ram.

Large close-up of an orange and yellow butterfly Firefighter in full gear and breathing apparatus amid smoke
Aerial view of Marysville surrounded by floodwaters

Left Our Marysville service area becomes an island as floodwaters engulf surrounding communities.
Photo: Yuba Water Agency

Below CEO Marty Kropelnicki delivers sweets from Cal Water customer See’s Candies to evacuees during the Oroville Dam emergency.

See's Candies box brought by CEO to Oroville Dam evacuees

Going above and beyond
when disaster strikes

1997

Torrential rains and weakened levees lead to the evacuation of Cal Water’s entire Marysville service area. Our priority is keeping the system pressurized to prevent any flood waters from contaminating our water. We use emergency generators and keep our elevated storage tank full. The levees around Marysville hold, but others fail, leaving the entire city surrounded by water.

Being there during
and after emergencies

1952

Earthquakes hit Southern California in July and August 1952, causing an estimated $100 million in widespread damage. The City of Bakersfield is severely impacted, but the Company’s Bakersfield system only suffers about $35,000 in damage, including the loss of an elevated storage tank. Cal Water provides uninterrupted water service both during and after the disaster; it uses what it learns about storage tanks to strengthen infrastructure in preparation for future disasters.

Press clipping headline reading Steel and Buildings Available NOW for Earthquake Repair Work

Below Cal Water’s only major loss during the Bakersfield earthquake is this elevated tank, but the broader community experiences significant damage.

Collapsed elevated storage tank after the Bakersfield earthquake

Investing in
infrastructure
that stands the
test of time

One of the most impactful things we do for customers is invest responsibly in water system infrastructure that will stand the test of time. Continually maintaining and upgrading pipes, pumps, treatment plants, wells, fire hydrants, and other critical infrastructure enables us to deliver a safe, reliable water supply,

both now
and in
the future.

Partnering to secure
additional water supplies

2003

To serve 15,000 new customers in Bakersfield and diversify its water supply sources, Cal Water completes the construction of a treatment plant that can produce 20 million gallons of water per day. The Northeast Water Supply Project uses membrane filtration to treat surface water from the Kern River—a supply that is secured through a partnership with the City of Bakersfield.

Golf ball resting in bright green grass
Industrial water treatment infrastructure with valve arrays and pipes

Building despite
the obstacles

1945

Although war-related government restrictions on use of materials aren’t eliminated until late in the year, Cal Water invests in infrastructure needed to serve its growing communities. The Company installs 60 miles of new water main, drills and equips seven new wells and pump stations, completes five new booster pumps, and erects seven new storage tanks.

Black and white photograph of an early elevated water storage tank that used gravity to provide water pressure

LEFT In the early days, elevated storage tanks utilized gravity to provide adequate pressure.

Adding storage to provide
water when needed

1932

Cal Water completes the Chenery project, the centerpiece of which is a one-billion-gallon reservoir in Concord, California. During the winter and spring, the reservoir receives approximately 22 million gallons of water daily from the Suisun Bay, which is stored to meet summertime needs. The project will meet the needs of the Company’s 200-square-mile Contra Costa District for the next 20 years.

Bottom Right Award-winning Harris Reservoir is built within the existing tank.

Bottom Left Company “suits” strike a pose at the site of the massive Chenery Reservoir.

Cal Water executives posing at the Chenery Reservoir construction site, circa 1932
Aerial photograph of the award-winning Harris Reservoir, built within the existing tank structure

Seizing growth
opportunities
for good

In the early days, growth opportunities were as plentiful as the California sunshine, and despite our conservative, strategic approach to acquisitions, we were the largest private water utility in the west within five years of our founding. Today, we continue to evaluate whether an acquisition makes sense, not just for our stockholders, but for our existing customers and the customers we would be serving. Our focus is on adding value for all concerned,

both now and
into the
future.

Establishing a presence
outside of California

1999

The Company establishes its first operation outside of California when it acquires Harbor Water Company in Gig Harbor and South Sound Utilities in Olympia, two companies whose history of designing and constructing water systems dates back to 1975. The newly formed entity, Washington Water Service, retains a local team of 22 professionals serving about 47,000 people through 14,800 customer connections.

Texas state flag waving
Aerial view of a marina with sailboats in Pacific Northwest waters

Growing by leaps
and bounds

1931

By the end of 1931, Cal Water is the largest regulated water utility on the pacific coast, providing service to 73,000 customers in California, with service areas ranging from Redding in the north to Los Angeles in the south. It has added 24 service areas since 1926, capping a five-year period of tremendous growth.

Right Dominguez Water’s bull logo reflects the purpose of its formation: to irrigate ranchland used to raise cattle.

Below Cal Water expands to serve the many new communities formed to accommodate a booming population.

Construction worker at a black steel water tank wall during Cal Water expansion
Orange Dominguez Water storage tank with company logo

Below Dominguez Water’s bull logo reflects the purpose of its formation: to irrigate ranchland used to raise cattle.

Orange Dominguez Water storage tank with company logo

Below Cal Water expands to serve the many new communities formed to accommodate a booming population.

Construction worker at a black steel water tank wall during Cal Water expansion
1971 Annual Report to Stockholders showcasing multi-family housing developments Supporting photography alongside the annual report
ABOVE Cal Water’s annual report showcases the multi-family residences that are springing up in its highly populated communities.
Red fire hydrant pipe close-up

Meeting customers
where they are

1970

A lack of available space and higher land prices result in the proliferation of apartments and other multifamily dwellings in Cal Water’s service areas, notably on the San Francisco Peninsula and in Los Angeles County. The 1971 Annual Report to Stockholders features images of lushly landscaped and swimming pool–studded developments in Cupertino, Livermore, and Redondo Beach.

Customer
service that
meets the
moment

Customer needs and expectations change over time, and from the beginning, we have provided service that meets the moment. The key for us is to understand how current events, economic conditions, and advances in technology are impacting customers’ daily lives. Armed with that knowledge, we go above and beyond to

enhance
their
experience.

Helping customers grow
what’s right for the times

1944

To support the war effort on the homefront, Americans across the country grow fruits and vegetables to supplement the nation’s food supply. Survey results indicate that 80% of Cal Water’s customers are cultivating these “Victory Gardens.” To support their efforts, Cal Water offers bill credits that lower participating customers’ bills.

Bright orange safflower plants against white background
Vintage black and white photo of a mother and child harvesting vegetables from a WWII victory garden
Children playing basketball at a Boys & Girls Club court

Below and left Children are a big part of Cal Water’s philanthropy, whether they are playing at the Boys & Girls Club or picking up new shoes for school.

Red children's sneakers

Holding out a hand to
those who need it most

2007

Cal Water becomes one of the two large California Public Utilities Commission-regulated water utilities to offer a low-income rate assistance program, which provides a discount on the monthly water bill to qualified households, non-profit group homes, and agricultural employee housing. Customers can qualify simply by showing that they receive a low-income discount from their electricity supplier.

Providing service that
meets today’s needs

1947

Employees in the Central Billing Office located in our Stockton District manually calculate customer bills using handwritten meter reads, massive cash registers, and mechanical addressographs. Remarkably, water rates are the same in 1947 as they were when the Company was founded in 1926. The conversion to computerized billing won’t take place until 1968.

Black and white group photo of Cal Water employees at a company barbecue in the 1940s

Above Employees pause for a photo at a barbecue, one of many barbecue meals shared over the years.

Right Employees in the Stockton office prepare bills manually in the 1940s.

Black and white photo of women working in Cal Water billing office in the 1940s

Strategic
planning for
water supply
resilience

When there is enough water, families thrive, communities grow, businesses prosper, and firefighters save lives. Since the day we were founded, we have found ways to overcome supply challenges posed by limited local water supplies, a growing population, and frequent periods of drought. What we have learned from the past will make us

even better in
the decades
to come.

Strategically utilizing
water supplies

1960

In the 1960s, with the population continuing to boom, the emphasis is on securing and storing supplemental water supplies. Cal Water works with the State of California to secure State Water Project deliveries and with other agencies on long-term water supply agreements. It builds tanks and pipelines to deliver supplemental supplies when and where they are needed.

Vintage US Motors electric pump motor used in water infrastructure
Black and white photo of a worker on a ladder inspecting a concrete reservoir under construction
Aerial black and white photo of post-WWII housing developments in California
Annual report pages showing Cal Water service area map and growth history

Above More and more homes are built as postwar population soars; Cal Water annual report delineates growing service areas.

Responding to droughts
and population growth

1948

Growing population and drought conditions strain supplies

The combination of population growth and drought is a recurring challenge in the Company’s history. After World War II, the population in California explodes, growing more than 53% from 1940 to 1950. That, combined with what Company President Ralph Elsman characterizes as “abnormally low rainfall” in 1948, poses a challenge that Cal Water overcomes through its “policy of planned development of sources of supply.”

Below Cracked, dry earth is a common sight for drought-weary Californians.

Drought conditions in California — parched earth with a small water channel
Illustration from Alice in Waterland, a Cal Water educational production

ABOVE From “Alice in Waterland” to Disney's “Environmentality,” Cal Water uses entertainment to teach kids about water conservation.

Teaching customers of the
future about water conservation

1988

In yet another severe drought, Cal Water partners with the California Department of Water Resources to hold workshops for teachers on water science and water-related activities. It also sponsors a theatrical production for grade school students by the Small Change Theatre Group entitled “Alice in Waterland.”

Chairman's
letter

We commemorate our 100th anniversary by celebrating the legacy that foreshadows our next 100 years. Because we haven’t just survived a century; we’ve shown time and again our ability to overcome challenges and thrive for a century. And as Confucius once said, “Study the past, if you would divine the future.”

You see glimpses of our impressive history in this report; for a more complete timeline and a treasure trove of historical photographs and documents, please visit 100years.calwatergroup.com.

Expanding our footprint into two new states

Kicking off our centennial year with yet another milestone, we announced in February an agreement to purchase the Nevada and Oregon water and wastewater systems of Nexus Water Group. The acquisition, which is subject to customary closing conditions and approvals, will add approximately 36,000 equivalent residential connections in two new states, establish a platform for additional growth, and bolster our position as the largest investor-owned water utility in the western United States. We hope to receive regulatory approvals for the acquisition in late 2026.

Poised for growth in Texas

We also reached an agreement to purchase the remaining outstanding membership interests in BVRT Utility Holding Company LLC. The transaction will make our subsidiary Texas Water Service (TWSC, Inc.) the sole owner of seven water and wastewater utilities in the high-growth Austin–San Antonio corridor. Together, these utilities serve 5,000 customer connections and have approximately 14,000 additional customer connections under contract.

Annual dividend per common share bar chart, including 7.7% compound annual growth rate. Detailed amounts by year are in the accompanying data table. CAGR: Compound annual growth rate.
Annual dividend per common share, 2021 through 2025. Compound annual growth rate 7.7%. The 2025 amount includes a one-time dividend of $0.04 per common share.
2021 2022 2023 2024 2025
Annual dividend per common share $0.92 $1.00 $1.04 $1.12 $1.24 (Includes one-time dividend of $0.04 per common share)
Capital investment in infrastructure bar chart, including 15.3% compound annual growth rate. Detailed amounts by year are in the accompanying data table. CAGR: Compound annual growth rate.
Capital investment in infrastructure, 2021 through 2025. Amounts in millions of dollars. Compound annual growth rate 15.3%.
2021 2022 2023 2024 2025
Capital investment in infrastructure $293 million $328 million $384 million $471 million $517 million

*CAGR: Compound annual growth rate
**Includes one-time dividend of $0.04 per common share

Financial Highlights
Dollars in thousands, except per common share data
Year ended December 31 2025 2024 2023 2022 2021
Market price at year end $43.33 $45.33 $51.87 $60.64 $71.86
Book value per share $28.33 $26.42* $25.82* $23.70 $21.72
Earnings per share (diluted) $2.15 $2.16* $2.00* $1.77 $1.96
Dividend per share $1.24 $1.12 $1.04 $1.00 $0.92
Operating revenue $1,000,140 $949,324* $882,114* $846,431 $790,909
Net income attributable to California Water Service Group $128,211 $126,827* $115,891* $96,011 $101,125

*Indicates non-GAAP amounts. The effects of the interim rate relief recorded in 2024 related to the delayed 2021 CA GRC decision were included in the 2023 non-GAAP revenue, net income, and earnings per share and excluded from the 2024 non-GAAP revenue, net income, and earnings per share. Specifically, the 2023 non-GAAP amounts include revenue of $87.5 million, net income of $64.0 million, and $1.09 diluted earnings per share added to GAAP balances of $794.6 million in revenue, net income of $51.9 million, and $0.91 diluted earnings per share. The 2024 non-GAAP amounts exclude revenue of $87.5 million, net income of $64.0 million, and $1.09 diluted earnings per share from GAAP balances of $1,036.8 million in revenue, net income of $190.8 million, and $3.25 diluted earnings per share. Non-GAAP information is presented to enable stockholders to better assess the Company’s 2025 financial performance by showing 2024 results without the impact of the 2023 interim rate relief. Ratios, percentages, and other information dependent on earnings are presented using non-GAAP earnings results.

Celebrating 2025 accomplishments

It’s been an exciting start to our centennial year, and I look forward to the rest of 2026. But before we move ahead, I want to highlight a few key 2025 accomplishments:

  • We met or surpassed all water quality standards set to protect public health and safety, constructed two PFAS treatment plants, and completed design on an additional 26 PFAS treatment plants.
  • We invested a record $517 million in water system infrastructure to provide safe, reliable water service to customers.
  • We introduced Walmart Bill Pay to support customers in need of a convenient way to pay by cash or debit card.
  • We contributed nearly $2 million to charitable organizations serving our communities, and nearly 50% of our employees volunteered their time during our Season of Service.
  • We entered into a 20-year agreement to purchase power from a solar photovoltaic array to be installed at our Northeast Bakersfield Treatment Plant.
  • We made USA Today’s 2025 List of “American Climate Leaders” and were named “One of America’s Greenest Companies” by Newsweek.
  • We entered into an agreement to own and operate wastewater and recycled water systems serving a master-planned, mixed-use development in San Bernardino County, California, with 500 customers initially and up to 15,000 at full buildout.
  • We were named a Great Place to Work for the 10th consecutive year.
  • We earned an A+/Stable rating from S&P Global for California Water Service Group, one of the highest credit ratings in the domestic utility space.
  • We increased our annual dividend by 10.71%, or $0.12, to $1.24 per common share, which includes a special one-time dividend of $0.04 per common share.

Awaiting a decision on our 2024 GRC

As this report goes to press, we await the California Public Utilities Commission’s decision on our California 2024 General Rate Case (GRC). In our application, we request revenue increases of $296.6 over three years and authorization to invest $1.6 billion in water system infrastructure from 2026 to 2028. I expect to receive the decision by the end of the first quarter of 2026.

Looking to 2026 and beyond

The next year and beyond will be exciting, as we integrate new utilities and pursue growth opportunities that come our way in the western United States, including Nevada, Oregon, and Texas. We will also make investments in water system infrastructure to continue providing a safe, reliable water supply and affordable, excellent service to our customers and communities.

We are enjoying a unique moment in our Company’s history: a time to celebrate the past and look forward to the future. It’s also a time to pause and consider how exceedingly rare it is for a business to make it to 100 years old—by most estimates, less than 1% of all businesses achieve this milestone. We are in good company, joining the likes of Coca-Cola, Proctor & Gamble, Kellogg’s, Johnson & Johnson, and Harley Davidson.

For us, the key to success has been and will continue to be a commitment to doing the right thing, making lives better, and fulfilling our mission. We’ve done it for 100 years and we’re ready to do it for 100 more. Thank you for your continued trust and investment in California Water Service Group.

Portrait photograph of Martin A. Kropelnicki, Chairman, President and CEO
Signature of Martin A. Kropelnicki

Martin A. Kropelnicki

Chairman, President & Chief Executive Officer

Lead Independent
Director letter

What an exciting time to be part of this great, 100-year-old company! I was drawn to California Water Service Group by its strong vision, values, and strategy. During my tenure, it’s become clear that this team operates as One Team, working together to achieve a shared mission: provide safe, reliable, and affordable water and wastewater services to customers.

Looking back through our history, I’m impressed by the significant challenges we’ve overcome to fulfill our purpose and enhance the quality of life for our customers, communities, and stockholders. I don’t know what the next 100 years will bring, but I believe that we will be successful by staying true to who we are: a company with a legacy of strong vision, values, and strategy.

Our centennial year has started off with some exciting growth opportunities that position us well for continued expansion. I know I speak for the entire Board of Directors when I say we are looking forward to providing insight and guidance to management as it navigates what lies ahead. We thank you for your continued investment in California Water Service Group.

Portrait photograph of Scott L. Morris, Lead Independent Director
Signature of Scott L. Morris

Scott L. Morris

Lead Independent Director

Then. Now.

1927

Paid our first dividend to shareholders

2025

Paid our 323rd consecutive quarterly dividend

1986

Made Forbes’ list of “200 Best Small Companies in America”

2025

Included in USA Today’s “List of American Climate Leaders”

1994

Closed first year on NYSE with a market cap of $199.9 million

2025

Closed 2025 with a market cap of $2.6 billion

Next…

We want to thank employees who retired in 2025. As you look to your next chapter, may you see only good health and happiness ahead. A special thank you to those retiring with 25 years of service or more:

Judy Randall

Manager, Construction Accounting

37 years

Robert Hanson

Electrical/Mechanical Technician

36 years

Rocky Lundy

Superintendent

35 years

Michael Hanson

Treatment Plant Operator Grade III

34 years

Jeffrey Freeman

Sub-Structure Locating Technician

34 years

Patricia Herron

Superintendent

34 years

Darryl Jountti

Foreman, Operations & Maintenance

34 years

Thomas Sillert

T-6 Senior SCADA/Autocad Specialist

33 years

Eliot Harper

Certified Pump Operator

32 years

Leonard Clewett

Cross Connection Control Specialist

32 years

Christopher Tran

Manager, IT Architecture

32 years

Linda Przybyla

Engineering Coordinator, New Business

32 years

Daniel Guardado

Foreman, Construction & Operations

30 years

John Muñoz

Regional Foreman, Flushing & Valve Maintenance

28 years

James Douglas

Superintendent

27 years

Lawrence Mansfield

Distribution Service Technician, Water Quality Technician

27 years

Anne Andrijasevich

Regional Customer Service Representative

26 years

Fabian Ramirez

Foreman, Hydrant Maintenance

25 years

Our service
areas

California service area with customer connections for 2024 and 2025
Customer Connections
California

California Districts

  • Bakersfield
  • Bay Area Region (serving South San Francisco, Colma, Broadmoor, San Mateo, San Carlos, Lucerne, Duncan Mills, Guerneville, Dillon Beach, Noel Heights, and portions of Santa Rosa)
  • Bear Gulch (serving portions of Menlo Park, Atherton, Woodside, and Portola Valley)
  • Dixon
  • East Los Angeles
  • Kern River Valley
  • Livermore
  • Los Altos (including portions of Cupertino, Los Altos Hills, Mountain View, and Sunnyvale)
2024499,400 2025500,000
  • Los Angeles County Region (serving Palos Verdes Estates, Rancho Palos Verdes, Rolling Hills, Rolling Hills Estates, Fremont Valley, Lake Hughes, Leona Valley, and Lancaster)
  • Marysville
  • North Valley Region (serving Chico, Hamilton City, and Oroville)
  • Salinas Valley Region (including Salinas and King City)
  • Selma
  • South Bay Region (serving Hermosa Beach, Redondo Beach, Carson, and portions of Compton, Harbor City, Long Beach, Los Angeles, and Torrance)
  • Stockton
  • Visalia
  • Westlake
  • Willows
Estimated population 1926 vs 2025
Estimated
population
1926 85,000
2025 2,100,000
Service areas with customer connections for 2024 and 2025
Customer Connections
Hawaii Serving the communities of Ka‘anapali, Kapalua, Pukalani, Waikoloa, North Kona Coast, Keauhou, Kalaeʻloa, and Poipu on the islands of Maui, Hawaii, O‘ahu, and Kauai 20246,700 20256,800
New Mexico Serving the communities of Meadow Lake, Cypress Gardens, Rio Communities, Rio Del Oro, Elephant Butte, Sandia Knolls, Indian Hills, Woodland Hills, Squaw Valley, Cedar Crest, Crouch Mesa/Morningstar, and Monterey Park in the counties of Sierra, Valencia, Torrance, Bernalillo, and San Juan 202411,500 202511,800
Texas Serving communities near Castroville, New Braunfels, Uhland, Kyle, Buda, Mustang Ridge, Creedmoor, and Niederwald in the counties of Medina, Guadalupe, Hays, Caldwell, and Travis 20244,200 20254,900
Washington Serving more than 425 neighborhoods and small communities in the counties of Clallam, Jefferson, Kitsap, Mason, Pierce, King, San Juan, and Thurston 202438,300 202538,500

Eight-year
financial review

Dollars in thousands, except per common share data and as otherwise noted.

Eight-year financial review — 2025 data
2025
Summary of Operations
Operating revenue $1,000,140
Operating expenses $829,771
Interest expense, other income and expenses, net $42,521
Net income $128,211
Common Share Data
Earnings per share (diluted) $2.15
Dividend declared $1.24
Dividend payout ratio 58%
Book value $28.33
Market price at year end $43.33
Common shares outstanding at year end (in thousands) 59,638
Return on average common stockholders’ equity 7.7%
Interest coverage ratio 5.37
Balance Sheet Data
Net utility plant $4,579,590
Total assets $5,671,365
Long-term debt, including current portion $1,474,238
Common stockholders’ equity 53.5%
Long-term debt 46.5%
Other Data
Water production (in million gallons) 105,741
Customers at year end, including Hawthorne and Commerce 562,000
New customers added 1,900
Operating revenue per customer $1,780
Utility plant per customer $10,515
Employees at year end 1,336
Eight-year financial review — 2024 through 2018 data
2024 2023 2022 2021 2020 2019 2018
Summary of Operations
Operating revenue $949,324 $882,114 $846,431 $790,909 $794,307 $714,557 $698,196
Operating expenses $811,752 $717,497 $718,771 $664,139 $657,641 $615,145 $587,656
Interest expense, net $34,969 $25,759 $32,397 $25,791 $39,835 $36,296 $44,956
Net income $126,827 $115,891 $96,011 $101,125 $96,831 $63,116 $65,584
Common Share Data
EPS (diluted) $2.16 $2.00 $1.77 $1.96 $1.97 $1.31 $1.36
Dividend declared $1.12 $1.04 $1.00 $0.92 $0.85 $0.79 $0.75
Dividend payout ratio 52% 51% 57% 47% 43% 60% 55%
Book value $26.42 $25.82 $23.70 $21.72 $18.08 $15.84 $15.19
Market price $45.33 $51.87 $60.64 $71.86 $54.03 $51.56 $47.66
Shares outstanding (000) 59,484 57,724 55,598 53,716 50,334 48,532 48,065
ROE 8.3% 8.3% 7.7% 9.7% 11.5% 8.4% 9.2%
Interest coverage ratio 5.96 5.94 5.89 5.95 5.95 5.12 5.37
Balance Sheet Data
Net utility plant $4,158,704 $3,773,255 $3,472,931 $2,846,862 $2,650,558 $2,406,370 $2,232,723
Total assets $5,180,293 $4,595,533 $4,264,813 $3,623,271 $3,394,248 $3,111,308 $2,837,704
Long-term debt $1,176,993 $1,053,440 $1,055,797 $1,060,986 $786,227 $808,622 $814,938
Common stockholders’ equity 58.8% 58.7% 55.6% 52.5% 53.7% 49.4% 47.3%
Long-term debt 41.2% 41.3% 44.4% 47.5% 46.3% 50.6% 52.7%
Other Data
Water production (M gal) 106,374 103,484 106,945 110,519 110,742 104,735 107,589
Customers at year end 560,100 556,400 553,000 547,600 543,000 520,600 517,500
New customers added 3,700 3,400 5,400 4,600 22,400 3,100 3,200
Revenue per customer $1,695 $1,585 $1,531 $1,444 $1,463 $1,373 $1,349
Utility plant per customer $9,642 $8,852 $8,203 $7,665 $7,165 $6,820 $6,240
Employees at year end 1,278 1,266 1,225 1,182 1,192 1,207 1,184

*Non-GAAP amounts. See footnote on page 39 and for more information, go to www.calwatergroup.com/investors/financials-filings-reports/non-gaap-info.

Board of
directors

Gregory E. Aliff

Former Vice Chairman and Senior Partner of U.S. Energy & Resources, Deloitte LLP

Director since 2015. Audit Committee; Chair, Finance and Capital Investment Committee; Enterprise Risk Management, Safety and Security Committee.

Shelly M. Esque

Former Vice President and Global Director of Corporate Affairs, Intel Corporation

Director since 2018. Enterprise Risk Management, Safety, and Security Committee; Nominating/Corporate Governance Committee.

Jeffrey Kightlinger

Principal and Owner of Acequia Consulting, LLC, and Former Chief Executive Officer, The Metropolitan Water District of Southern California

Director since 2023. Audit Committee; Enterprise Risk Management, Safety and Security Committee.

Martin A. Kropelnicki

Chairman, President, and Chief Executive Officer of California Water Service Group

Director since 2013.

Thomas M. Krummel, M.D.

Emile Homan and Chair Emeritus, Department of Surgery, Stanford University School of Medicine

Director since 2010. Organization and Compensation Committee; Chair, Nominating/Corporate Governance Committee.

Yvonne A. Maldonado, M.D.

Vice Provost for Faculty Advancement, Taube Professor of Global Health and Infectious Diseases, Stanford University School of Medicine

Director since 2021. Enterprise Risk Management, Safety, and Security Committee; Nominating/Corporate Governance Committee.

Scott L. Morris

Chairman, Avista Corporation

Director since 2019. Lead Independent Director; Nominating/Corporate Governance Committee; Chair, Organization and Compensation Committee.

Charles R. Patton

Former Executive Vice President, External Affairs, American Electric Power Company, Inc.

Director since 2021. Audit Committee; Finance and Capital Investment Committee.

Carol M. Pottenger

Principal and Owner of CMP Global, LLC, and Retired U.S. Navy Vice Admiral

Director since 2017. Enterprise Risk Management, Safety, and Security Committee; Finance and Capital Investment Committee; Chair, Nominating/Corporate Governance Committee.

Lester A. Snow

Former Secretary of California Natural Resources Agency

Director since 2011. Enterprise Risk Management, Safety, and Security Committee; Chair, Finance and Capital Investment Committee; Organization and Compensation Committee.

Patricia K. Wagner

Former Group President, U.S. Utilities, Sempra Energy

Director since 2019. Finance and Capital Investment Committee; Audit Committee; Organization and Compensation Committee.

Corporate
officers

Shawn C. Bunting

Senior Vice President, General Counsel and Business Development

Shannon C. Dean

Senior Vice President, Customer Service and Chief Sustainability Officer

Kris A. Hamner

Vice President, Chief Human Resources Officer

Sophie M. James

Vice President, Water Quality and Environmental Affairs

Kenneth G. Jenkins

Vice President, Water Resources Planning and Sustainability

Martin A. Kropelnicki

Chairman, President, and Chief Executive Officer

Michael B. Luu

Senior Vice President, Corporate Services and Chief Risk Officer

James P. Lynch

Senior Vice President, Chief Financial Officer and Treasurer

Michael S. Mares

Senior Vice President, Operations

Greg A. Milleman

Vice President, Rates and Regulatory Affairs

Michelle R. Mortensen

Vice President, Corporate Secretary and Chief of Staff

Daryl L. Osby

Vice President, Emergency Preparedness, Safety, and Security

Elissa Y. Ouyang

Vice President, Facilities, Fleet, and Procurement

Shilen M. Patel

Chief Business Development Officer and Vice President Texas Water Service (TWSC, Inc.)

Todd K. Peters

Chief Engineering Officer

Thomas A. Scanlon

Corporate Controller and Principal Accounting Officer

Justin B. Skarb

Vice President, Government and Community Affairs

Corporate
information

To Transfer Stock

A change of ownership of shares (such as when stock is sold or gifted or when owners are deleted from or added to stock certificates) requires a transfer of stock. To transfer stock, the owner must complete the assignment on the back of the certificate and sign it exactly as his or her name appears on the front. This signature must be guaranteed by an eligible guarantor institution pursuant to SEC Rule 17Ad-15. A notary’s acknowledgment is not acceptable. The certificate should then be sent to Computershare Investor Services (Computershare) by registered or certified mail with complete transfer instructions. Alternatively, the Direct Registration System can be utilized, which allows electronic share transactions between your broker or dealer and Computershare.

Annual Report for 2025 on Form 10-K

A copy of the Company’s annual report for 2025 filed with the Securities and Exchange Commission (SEC) on Form 10-K is available and can be obtained by any stockholder at no charge upon written request to the Investor Relations Department. The Company’s filings with the SEC can be viewed via the link to the SEC’s EDGAR system on the Company’s website.

Anticipated Dividend Dates for 2026

Anticipated dividend dates for 2026
Quarter Declaration Record Date Payment Date
First January 28 February 10 February 20
Second April 29 May 11 May 22
Third July 29 August 10 August 21
Fourth October 28 November 9 November 20

Annual Meeting

The Annual Meeting of Stockholders will be held online on Wednesday, May 20, 2026, at 9:30 a.m. PT. Details of the business to be transacted during the meeting will be contained in the proxy material, which will be mailed to stockholders on or about April 8, 2026.

Computershare Investor Services

462 South 4th Street, Suite 1600
Louisville, Kentucky 40202

Bond Registrar

U.S. Bank Trust, N.A.
One California Street
San Francisco, CA 94111
415.273.4580

Executive Office and Stockholder Information

California Water Service Group
Attn: Stockholder Relations
1720 North First Street
San Jose, California 95112
408.367.8200 or
800.750.8200
www.calwatergroup.com

FSC Mix label: Paper | Supporting responsible forestry, www.fsc.org, FSC C016435

This report contains forward-looking statements that are based on currently available information, expectations, estimates, assumptions and projections, and management’s judgment about the Company, the water utility industry, and general economic conditions. Forward-looking statements, which are identified by words such as “will, expect, intend, plan, believe, anticipate, project, will, forecast, are not guarantees of future performance, and actual results may vary materially. Please see our 2025 Annual Report on Form 10-K for more information.

Photo collage: a red fire valve wheel, a vintage 1950s Cal Water fire truck crew, and a modern Cal Water service team

1720 North First Street, San Jose, California 95112-4508
408.367.8200  |  www.calwatergroup.com  |  NYSE: CWT