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Welcome to Pennbrook | CAIB Insurance!

Pennbrook/CAIB Insurance Services is a full service insurance brokerage located in downtown San Francisco who caters to business and personal clients. We anticipate their needs via risk management services and insurance products including property, general liability, directors & officers’ liability, errors & omissions, bonds, workers compensation, employee benefits, individual auto, home & health.


Since 1982, we have assisted our clients to understand their risks. We provide each client with a team of professionals including a single point of contact, risk manager, account manager and your own claims specialist. Every client receives individualized exceptional treatment.


HR & Employee Benefits Portal

Our Providers


We have utilized the brokerage services of Pennbrook Insurance Services for many years for our various insurance requirements, Pennbrook has a wealth of knowledge concerning various types of insurance and have been very analytical in finding us the best, most reasonable coverage available. Other firms have tried to talk us into switching our coverage to them, but I have found the other firms to be unreliable. We appreciate the technical services (e.g., exposure analysis; policy design etc.) provided by the entire Pennbrook staff as they continue to assist us in our risk management administration.
Kim Boyce
Reflect Scientific, Inc.
GC International, Inc. is a $6 million annual revenue Southern California non-ferrous casting company. We have utilized the Brokerage services of Pennbrook Insurance services for over 10 years. We have found the staff and owners, especially Clay Wiens, President, and Mark Sarjeant C.P.C.U., our Managing Broker, to be the best and most resourceful people in the insurance industry that we have dealt with in the past 32 years.
Bill Griffith
GC International, Inc.
Pennbrook has been instrumental in helping Java Detour with a series of insurance issues. We are a growing company and we really look at Pennbrook as a partner in our current and future success. I would highly recommend Pennbrook as your insurance broker.
Ron Sands
Java Detour
We have multiple policies across many different entities and Pennbrook not only saved us money overall, but has kept us on track on all the little details needed to help run our business. They are a true partner!
Connie Wilcox
PB Development
Our business, Sapphire Ventures, Inc., owns and manages Supercuts shops in Southern California. We have had Clay Wiens and Pennbrook Insurance as our business "partners" for more than 25 years. Not only have they been great insurance brokers for our business, Clay has given us invaluable advice and insured our house, through an earthquake and our cars, through 3 teen aged drivers. He has also supported, advised and insured many other Supercuts franchisees through his relationship with the Supercuts Franchisee Association.
Joey and Cheryl Robinson
Sapphire Ventures, Inc.
Jude and Pennbrook are one of the most details oriented, results driven agencies I have ever had the pleasure of working with. They are tremendously resourceful and an asset to my business.
Renee Engelen
HRH Real Estate Services Inc.
We have multiple policies across many different entities and Pennbrook not only saved us money overall, but has kept us on track on all the little details needed to help run our business. They are a true partner!
Jessie Rhodes
PB Real Estate Development
Pennbrook Insurance has been an indispensable resource for Earth Island Institute. The extensive experience of Clay Wiens and his staff with a wide range of exposures for nonprofit clients has helped us navigate through dozens of "special situations" over the years, as we supported more than 100 projects under our fiscal sponsorship in our first 25 years. It's hard to imagine how we could have accomplished all this without always courteous and competent help from Pennbrook.
John Knox
Earth Island Org

Our Location

Pennbrook/CAIB Insurance Services

300 Montgomery Street, Suite 450
San Francisco, CA 94104

Phone Number:

Main office:415-231-5523

Office Hours:

Mon: 7:00 AM - 6:00 PM
Tues: 7:00 AM - 6:00 PM
Wed: 7:00 AM - 6:00 PM
Thurs: 7:00 AM - 6:00 PM
Fri: 7:00 AM - 6:00 PM
Sat: Closed
Sun: Closed