NSM UK Holdings
B3 Insurance (formerly NSM UK Holdings) is a UK specialist insurance holding company, wholly owned by Ignyte Insurance. Through First Underwriting (MGA), Kingfisher Insurance (broker), and Kingsbridge (contractor and IR35 services), it distributes niche, commercial, and personal insurance lines via brokers and direct channels to UK contractors, small businesses, and high-net-worth individuals.
- Company typePrivate
- Founded-
- HeadquartersLondon, United Kingdom
- Headcount251–500
- GTM typeB2B
- OfferingServices
What NSM UK Holdings does
B3 Insurance Limited (formerly NSM UK Holdings) is a UK-based specialist insurance holding company headquartered at Level 15, The Gherkin, 30 St Mary Axe, London. It operates as a wholly-owned subsidiary of Ignyte Insurance, a global specialist insurance provider, and groups three operating businesses: First Underwriting, a specialist Managing General Agent (MGA) providing niche and commercial products to brokers; Kingfisher Insurance, a specialist broker with a portfolio spanning personal and commercial lines (including Kingfisher Private Client for high-value assets and Peter James Insurance); and Kingsbridge, which delivers insurance and IR35 services to contractors, tradespeople, and small business owners.
The group distributes primarily through insurance broker relationships, supplemented by direct broker operations and direct-to-consumer channels in personal and contractor lines. It employs 121+ people globally and claims 16+ years of industry leadership, with managed premium referenced in marketing materials (though revenue is not publicly disclosed). Underwriting and brokerage workflows are supported by an internal technology platform spanning multiple specialty lines, but no proprietary AI/ML capabilities, patents, or external technology integrations are disclosed in available source material.
The business model is a combination of commission-based brokerage revenue (Kingfisher, Kingsbridge), MGA-style premium and fee income on broker-originated business (First Underwriting), and ancillary service income such as IR35 compliance support. Pricing is quote-based and tied to individual risk profiles rather than standardized rate cards. No funding rounds, key management bios, or regulatory actions beyond a 2026 Claims Excellence Awards shortlisting are disclosed in the source data.
NSM UK Holdings firmographics
Firmographics- Name
- NSM UK Holdings
- Legal name
- B3 Insurance Limited
- Website
- https://nsmgroup.com
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- B3 Insurance (formerly NSM UK Holdings) is a UK specialist insurance holding company, wholly owned by Ignyte Insurance. Through First Underwriting (MGA), Kingfisher Insurance (broker), and Kingsbridge (contractor and IR35 services), it distributes niche, commercial, and personal insurance lines via brokers and direct channels to UK contractors, small businesses, and high-net-worth individuals.
- Ownership category
- akta.pro rank
NSM UK Holdings industry classification
Industry- Product category
- Specialist Insurance
- NAICS
- Agencies, Brokerages, and Other Insurance Related Activities (5242), Insurance Agencies and Brokerages (524210)
- SIC
- Insurance Agents, Brokers & Service (6411)
- akta.pro primary industry
- Specialty Insurance Brokerage (Marine, Aviation, Cyber, Professional Lines) (FSAEADAJ)
Keywords
Where NSM UK Holdings is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
NSM UK Holdings business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D
Revenue model
- Insurance Premium Revenue: Generates revenue through insurance premium collection across specialty and commercial lines, managed premium through MGA and broker operations
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | Custom insurance products tailored to individual risk profiles |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
NSM UK Holdings product offering
Product offeringCore offering
NSM UK Holdings (now operating as B3 Insurance) is a specialist insurance holding company that owns and operates three core subsidiaries: First Underwriting (a Managing General Agent offering niche and commercial insurance products to brokers), Kingfisher Insurance (a broker with personal and commercial lines), and Kingsbridge Insurance (a provider of insurance and IR35 services for contractors, tradespeople, and small business owners). The group distributes insurance products primarily through a network of intermediary brokers and MGA relationships, backed by global parent Ignyte Insurance.
Differentiator
Problem solved
Functional benefit
Products and services
- B3 Insurance
Companies that use NSM UK Holdings
Customer profileNamed customers2 records
Segments3 records
Ideal customer profiles4 records
NSM UK Holdings technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
NSM UK Holdings partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Canford Classic & Supercar SundayminorKingfisher Private Client continues as Official Insurance Partner for Canford Classic and Supercar Sunday 2026 for the second consecutive year. This event sponsorship provides brand visibility to high-net-worth vehicle owners and automotive enthusiasts.
Scale indicators4 records
Recent moves5 records
Expansion highlights4 records
NSM UK Holdings competitors and assessment
Company assessmentDirect peers
- Aston Lark: UK specialist insurance broker group (now part of Howden) operating a comparable multi-brand model across commercial, personal, and specialty lines. Highly analogous to B3 Insurance's Kingfisher/Kingsbridge/First Underwriting structure.
- CFC Underwriting: London-based specialist MGA focused on niche commercial lines distributed through brokers. Most directly comparable to B3 Insurance's First Underwriting MGA, with similar underwriting-led, broker-distributed specialty insurance model.
- PIB Group: UK specialist insurance broker consolidator with a multi-brand, multi-product strategy very similar to B3 Insurance. Both groups pursue organic growth plus tuck-in M&A of niche brokers and MGAs to build scale in fragmented UK specialty lines.
- Jensten Group: UK insurance broker consolidator building scale through acquisitions of regional broker and MGA businesses. Comparable to B3 Insurance in headcount range and in the use of M&A as a core growth lever.
Broad incumbents
- Howden Group Holdings: Global specialty insurance broker with deep UK presence following the Aston Lark acquisition. Operates a similar multi-brand specialist broker strategy but at materially greater scale than B3 Insurance.
- Marsh McLennan (Marsh): Global insurance broker and risk advisor with substantial UK specialty operations. Comparable to B3 Insurance as a broker-of-record for specialty and commercial risks, though operating at a vastly larger scale.
- Ardonagh Group: Major UK-headquartered insurance broker group with broad specialty and personal lines offerings. Provides a scaled comparator for B3 Insurance's multi-channel broker strategy, though much larger and more diversified.
- Aon plc: Global insurance and reinsurance broker with significant UK specialty and personal lines presence. Comparable to B3 Insurance's broker-distributed specialist model, though at enterprise scale.
- Beazley plc: London-listed specialty insurer with strong Lloyd's franchise covering marine, cyber, and professional lines. Comparable to B3 Insurance's specialty/MGA positioning from a market-positioning standpoint, though at much greater scale and as a carrier.
- Hiscox Group: London-listed specialty insurer underwriting niche commercial and high-net-worth personal lines. Comparable to B3 Insurance's specialty lines focus but operates as a carrier rather than an MGA/broker platform.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
NSM UK Holdings social profiles
Digital presenceNSM UK Holdings financial estimates
Financial estimateRevenue estimate
Valuation estimate
NSM UK Holdings leadership team
Management profileNumber of profiles
NSM UK Holdings subsidiaries and ownership
Company hierarchySubsidiaries3 records
NSM UK Holdings funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
NSM UK Holdings M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about NSM UK Holdings
What does NSM UK Holdings do?
NSM UK Holdings (now operating as B3 Insurance) is a specialist insurance holding company that owns and operates three core subsidiaries: First Underwriting (a Managing General Agent offering niche and commercial insurance products to brokers), Kingfisher Insurance (a broker with personal and commercial lines), and Kingsbridge Insurance (a provider of insurance and IR35 services for contractors, tradespeople, and small business owners). The group distributes insurance products primarily through a network of intermediary brokers and MGA relationships, backed by global parent Ignyte Insurance.
Is NSM UK Holdings a public or private company?
NSM UK Holdings is a private company. It is classified as corporate owned and is currently operating.
When was NSM UK Holdings founded?
NSM UK Holdings was founded in -1. It employs 251 to 500 people.
Where is NSM UK Holdings based?
NSM UK Holdings is headquartered in London, United Kingdom, in the Europe region.
How does NSM UK Holdings make money?
One revenue line is on record: insurance Premium Revenue.
Who are NSM UK Holdings's main competitors?
Direct peers on record are Aston Lark, CFC Underwriting, PIB Group and Jensten Group. Broad incumbents are Howden Group Holdings, Marsh McLennan (Marsh), Ardonagh Group, Aon plc, Beazley plc and Hiscox Group.
Does NSM UK Holdings have an API?
No public API is recorded for NSM UK Holdings.
What industry is NSM UK Holdings in?
NSM UK Holdings's product category is Specialist Insurance. Its primary akta.pro industry code is FSAEADAJ, Specialty Insurance Brokerage (Marine, Aviation, Cyber, Professional Lines). Its NAICS code is 5242 and its SIC code is 6411.