What Sisk & Co. does

Sisk & Co. is a private insurance advisory firm headquartered in Denver, Colorado, founded in 1980. The firm operates with a small headcount of 11-50 employees and maintains a web presence at tjsisk.com. Its core offering is insurance advisory services, positioning it in the relationship-driven segment of the US insurance distribution market where client retention and producer expertise are primary drivers of revenue.

The firm's business model is consistent with a traditional insurance brokerage or advisory structure, where revenue is typically generated through commissions on placed coverage, advisory fees, and carrier relationships, though no specific pricing model, commission schedule, or fee structure is disclosed in the available sources. There is no public information on product breadth (commercial, personal, specialty lines), carrier appointments, or technology platform, and no certifications, awards, patents, or partnerships are documented in the source material.

An important data caveat: several blocks in the input describe an Irish construction contractor pivoting toward mission-critical infrastructure (data centres, grid, life-sciences) and expanding into the US market. These blocks do not reconcile with the firmographic identity of Sisk & Co. as a 1980-founded Denver insurance advisory, and the source ID attached to them is not corroborated by first-party firmographic data. Analysis here relies on the firmographic profile, and any signals drawn from the construction-contractor blocks are flagged as potentially misattributed.

Name

Sisk & Co.

Website

https://tjsisk.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

Sisk & Co. is a private insurance advisory firm based in Denver, Colorado, founded in 1980, serving clients with insurance and risk advisory services through a small team of 11-50 employees.

Ownership category

akta.pro rank

Headquarters

HQ city

Denver

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Core offering

Sisk & Co. is a privately held insurance advisory firm headquartered in Denver, Colorado, providing insurance placement, risk management, and related business consulting services to client organizations. Operating since 1980 with 11-50 employees, the firm functions as a trusted advisory partner helping clients make insurance, risk, and people-related decisions that add value and position their organizations for success.

Differentiator

Problem solved

Functional benefit

Products and services

• Insurance Advisory Services

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves1 record

Expansion highlights2 records

Direct peers

• Brown & Riding Insurance Services: Specialty insurance brokerage focused on niche and hard-to-place commercial risks; comparable to a boutique advisory that prioritizes technical placement expertise over scale.
• Heffernan Insurance Brokers: Mid-size independent insurance brokerage with strong presence across the western U.S., serving mid-market commercial clients — a close structural and operational peer to a Denver-headquartered boutique advisor.
• RPS (a Ryan company): Specialty insurance brokerage focused on complex and niche commercial risks; closely comparable to a boutique advisory that differentiates via technical placement expertise rather than scale.

Regional players

• Hub International: Mid-market insurance brokerage with strong presence across the U.S. and Canada, focused on middle-market commercial and personal lines; comparable to a boutique Denver firm in terms of mid-market focus.

Broad incumbents

• Aon: Global insurance and reinsurance brokerage with strong commercial P&C and risk advisory offerings for middle-market and large clients. Overlaps with a boutique advisory's middle-market book.
• USI Insurance Services: Top-10 U.S. insurance brokerage built largely through roll-up acquisitions; comparable as a competitor targeting the same middle-market commercial segment via local relationship-driven servicing.
• Arthur J. Gallagher & Co. One of the largest U.S. insurance brokerage and risk management firms, with a Denver regional office (the data references a Gallagher location at 4582 S. Ulster St., Denver). Comparable as a directly relevant competitor for mid-market and commercial insurance placements in the same metro, though Gallagher offers a far broader service portfolio.
• Marsh McLennan: Global insurance brokerage and risk advisory leader serving commercial and enterprise clients. Comparable in core function (commercial risk placement and advisory), though at vastly larger scale than a Denver boutique.
• AssuredPartners: U.S. insurance brokerage roll-up platform acquiring regional and middle-market brokerages including Mountain West firms; represents an active acquirer and direct competitor for the same mid-market accounts in Denver and Colorado.
• NFP (an Aon company): Specialty insurance brokerage and benefits advisory serving mid-market and select niche segments across the U.S.; comparable in focus on relationship-driven mid-market accounts, though now owned by Aon.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks5 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sisk & Co.