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Gathering insights about Costello & Sons Insurance Brokers

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Costello & Sons Insurance Brokers Tech Stack

Costello & Sons Insurance Brokers uses 8 technology products and services including AppNexus, WordPress, RSS, and more. Explore Costello & Sons Insurance Brokers's tech stack below.

  • AppNexus
    Advertising
  • WordPress
    Content Management System
  • RSS
    Content Management System
  • MySQL
    Database
  • Twemoji
    Font Scripts
  • Font Awesome
    Font Scripts
  • jQuery Migrate
    Javascript Libraries
  • Modernizr
    Javascript Libraries

Media & News

Costello & Sons Insurance Brokers's Email Address Formats

Costello & Sons Insurance Brokers uses at least 1 format(s):
Costello & Sons Insurance Brokers Email FormatsExamplePercentage
FLast@costelloandsons.comJDoe@costelloandsons.com
43%
Last@costelloandsons.comDoe@costelloandsons.com
7%
FLast@costelloandsons.comJDoe@costelloandsons.com
43%
Last@costelloandsons.comDoe@costelloandsons.com
7%

Frequently Asked Questions

Where is Costello & Sons Insurance Brokers's headquarters located?

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Costello & Sons Insurance Brokers's main headquarters is located at 1752 Lincoln Avenue, San Rafael, CA 94901, US. The company has employees across 3 continents, including North AmericaEuropeAsia.

What is Costello & Sons Insurance Brokers's phone number?

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You can contact Costello & Sons Insurance Brokers's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Costello & Sons Insurance Brokers's official website and social media links?

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Costello & Sons Insurance Brokers's official website is costelloandsons.com and has social profiles on LinkedIn.

What is Costello & Sons Insurance Brokers's SIC code NAICS code?

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Costello & Sons Insurance Brokers's SIC code is 6411 - Insurance Agents, Brokers, and Service NAICS code is 524 - Insurance Carriers and Related Activities.

How many employees does Costello & Sons Insurance Brokers have currently?

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As of December 2025, Costello & Sons Insurance Brokers has approximately 13 employees across 3 continents, including North AmericaEuropeAsia. Key team members include Owner: P. H. A.Senior Vice President Sales: J. H.Operations Manager: S. D.. Explore Costello & Sons Insurance Brokers's employee directory with LeadIQ.

What industry does Costello & Sons Insurance Brokers belong to?

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Costello & Sons Insurance Brokers operates in the Insurance industry.

What technology does Costello & Sons Insurance Brokers use?

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Costello & Sons Insurance Brokers's tech stack includes AppNexusWordPressRSSMySQLTwemojiFont AwesomejQuery MigrateModernizr.

What is Costello & Sons Insurance Brokers's email format?

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Costello & Sons Insurance Brokers's email format typically follows the pattern of FLast@costelloandsons.com. Find more Costello & Sons Insurance Brokers email formats with LeadIQ.

When was Costello & Sons Insurance Brokers founded?

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Costello & Sons Insurance Brokers was founded in 1939.

Costello & Sons Insurance Brokers

InsuranceUnited States11-50 Employees

History: 
    Costello & Sons Insurance (CSI) is a third generation brokerage originally opened in downtown San     Francisco. We have grown to over 2,000 clients and over $45,000,000 in insurance premium, which puts us in the top 15% of insurance brokers in the nation.  

Specialization:
While most brokers are “generalists” who attempt to be all things to all people, CSI specializes in these distinct  areas:
       1) Venture Capital & Private Equity Firms

       2) Technology Companies

       3) Personal Asset & Income Protection

CSI is a full service insurance brokerage firm, and we offer a wide range of products and services to meet the needs of our clients including property and casualty insurance, group health, 401(k), life, disability and long-term care.

CSI is also one of 20 members of TechAssure, a global group of elite  brokers endorsed by the National Venture Capital Association (NVCA) to deliver “best of breed” solutions and products for their members and portfolio companies. 

With offices in Northern and Southern California, CSI is a regional insurance broker that is small enough to know its clients by name and large enough to insure clients with worldwide operations.

CSI is successful because we represent every major insurance carrier in each of our niches, while maintaining personal relationships with these carriers due to our volume of business.

Section iconCompany Overview

Headquarters
1752 Lincoln Avenue, San Rafael, CA 94901, US
Phone number
SIC Code
6411 - Insurance Agents, Brokers, and Service
NAICS Code
524 - Insurance Carriers and Related Activities
Founded
1939
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $50M$100M

    Costello & Sons Insurance Brokers's revenue is estimated to be in the range of $50M$100M

Section iconFunding & Financials

  • $50M$100M

    Costello & Sons Insurance Brokers's revenue is estimated to be in the range of $50M$100M

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