California American Water Completes Acquisition of Yerba Buena Water Company

California American Water (NYSE:AWK) completed the acquisition of the Yerba Buena Water Company water system on Dec. 9, 2025.

Rhea-AI Summary

California American Water (NYSE:AWK) completed the acquisition of the Yerba Buena Water Company water system on Dec. 9, 2025. The system serves approximately 250 customers and the transaction was approved by the California Public Utilities Commission. California American Water will begin service immediately and will mail new customer and account information in the coming weeks. Customers gain access to the company's online portal MyWater and a dedicated webpage at californiaamwater.com/yerbabuena.

This is the company's ninth acquisition in five years, bringing more than 13,000 new water and/or wastewater customers since 2020.

Positive

• ~250 customers added to customer base
• Ninth acquisition in five years; 13,000+ customers added since 2020
• Acquisition approved by California Public Utilities Commission
• Immediate service transition and access to MyWater online portal

Negative

• None.

Argus Dec 10 session

+0.44% close to close Open Argus

Details

News Market Reaction – AWK

On Dec 10, the first trading day after this news, AWK closed 0.44% above the previous close.

Data tracked by StockTitan Argus for the Dec 10 session.

Market Context

This announcement highlights California American Water’s continued roll‑up of regulated systems, add...

Analysis

This announcement highlights California American Water’s continued roll‑up of regulated systems, adding the Yerba Buena Water Company’s roughly 250 customers and marking its ninth acquisition in five years, for over 13,000 new connections since 2020. The deal is already approved by the California Public Utilities Commission and focuses on infrastructure investment and customer service integration. Investors may watch how such tuck‑ins feed future rate cases and capital spending efficiency.

Key Figures

Yerba Buena customers: approximately 250 customers Acquisitions in 5 years: 9 acquisitions New customers since 2020: more than 13,000 customers

Yerba Buena customers

approximately 250 customers

Customers served by Yerba Buena Water Company system

Acquisitions in 5 years

9 acquisitions

California American Water acquisitions over the past five years

New customers since 2020

more than 13,000 customers

Water and/or wastewater customers added via nine acquisitions since 2020

Historical Context

5 past events · Latest: Dec 05

5 events

1. Dec 05

   Conservation notice

   24h Move

   -0.8%

   Statewide mandatory conservation notice after upgraded drought warning in New Jersey.

2. Dec 05

   Dividend declaration

   24h Move

   +0.4%

   Quarterly cash dividend of $0.8275 per share with dates for record and payment.

3. Dec 04

   Customer advisory

   24h Move

   +0.4%

   Guidance on preparing pipes for cold weather and promoting conservation tools.

4. Dec 04

   Customer advisory

   24h Move

   -1.6%

   National guidance on avoiding frozen pipes and checking for lead service lines.

5. Dec 04

   Customer advisory

   24h Move

   -1.6%

   Missouri-focused cold weather preparation tips and service line replacement info.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SAN DIEGO, Calif., Dec. 9, 2025 /PRNewswire/ -- California American Water announced today that it has completed its acquisition of the Yerba Buena Water Company water system. The purchase of the system, which serves approximately 250 customers, was previously approved by the California Public Utilities Commission (CPUC) and reflects California American Water's ongoing commitment to strengthening water infrastructure and enhancing service in communities across the state.

"This agreement is a positive step for our community," said Richard Morris, Chairman of the Board of Directors of Yerba Buena Water Company. "By partnering with California American Water, we're ensuring the expertise and investment needed to maintain and improve our water system for years to come. Our customers will benefit from enhanced service and infrastructure improvements."

California American Water will begin providing water service to Yerba Buena Water Company customers immediately. Residents will receive new customer and account information in the mail within the coming weeks to help facilitate the transition. Yerba Buena Water Company customers will be able to take advantage of California American Water's customer service benefits, including its online account management portal, MyWater. Additional information is also available on a dedicated webpage, Yerba Buena Water, at californiaamwater.com/yerbabuena.

"We're excited to welcome Yerba Buena Water Company customers to California American Water," said Sarah Leeper, President of California American Water. "Our team is committed to help ensure a smooth transition and provide safe, clean and reliable water service as well as high-quality customer care that our customers expect and deserve. We look forward to bringing our experience, expertise and resources to support this community."

This marks California American Water's ninth acquisition in the past five years, adding more than 13,000 new water and/or wastewater customers since 2020.

About American Water 
American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States. With a history dating back to 1886, We Keep Life Flowing® by providing safe, clean, reliable and affordable drinking water and wastewater services to more than 14 million people with regulated operations in 14 states and on 18 military installations. American Water's 6,700 talented professionals leverage their significant expertise and the company's national size and scale to achieve excellent outcomes for the benefit of customers, employees, investors and other stakeholders.

For more information, visit amwater.com and join American Water on LinkedIn, Facebook, X and Instagram. 

About California American Water 
California American Water, a subsidiary of American Water, provides safe, clean, reliable and affordable water and wastewater services to approximately 750,000 people.

View original content to download multimedia:https://www.prnewswire.com/news-releases/california-american-water-completes-acquisition-of-yerba-buena-water-company-302637227.html

SOURCE American Water

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

When did California American Water (AWK) complete the Yerba Buena Water Company acquisition?

The acquisition was completed on December 9, 2025.

How many customers does the Yerba Buena Water Company system serve that AWK acquired?

The acquired system serves approximately 250 customers.

Was the Yerba Buena acquisition approved by regulators for AWK (NYSE:AWK)?

Yes, the purchase was approved by the California Public Utilities Commission.

When will Yerba Buena customers start receiving California American Water service and account details?

California American Water began service immediately and customers will receive new account information by mail within the coming weeks.

What customer benefits will Yerba Buena customers gain from AWK (AWK)?

Customers gain access to AWK's customer service benefits, including the MyWater online account portal and a dedicated Yerba Buena webpage.

How does this acquisition affect California American Water's growth since 2020?

This deal is the company's ninth acquisition in five years, increasing its total by more than 13,000 water and/or wastewater customers since 2020.