4|5|3 Law Firm

What 4|5|3 Law Firm does

4|5|3 Law Firm (legally FOUR FIVE THREE LAW FIRM, SAP) is an independent Spanish professional law firm headquartered in Barcelona with a secondary office in Madrid, founded in March 2000 under the original name Marco Legal and rebranded to its current identity in 2018. The firm operates as a Sociedad Anónima Profesional under Spanish law, structured as a partner-led professional services corporation with no parent company, external investors, or external funding. It delivers legal advisory services across nine practice areas — Corporate & M&A, Tax, Labour and Employment Law, Litigation and Arbitration, Entrepreneurship and Innovation, White Collar Crime, Intellectual Property, IT/Privacy/Data Protection, and International Law — and serves seven dedicated industry sectors including Family Business, Venture Capital, TMT, Life Sciences, Energy, Real Estate & Construction, and Foundations/NGO. The firm is governed by Managing Partner Toni Fitó with a partner group that has been selectively expanded through lateral hires from larger Spanish firms such as Sagardoy, Garrigues, Roca & Junyent, and RSM.

The firm generates revenue on a per-engagement professional services billing model across a diversified client base of Spanish and international companies, public organizations, and institutions. Pricing is not publicly disclosed; engagements are quoted based on complexity, scope, and seniority of attorneys assigned. Documented mandates include advisory on the cross-border sale of Infinitec Activos to Evonik (2021), the sale of Netmind to Stockholm-listed BTS Group (2021), and the acquisition of BODEBOCA by client Decántalo Vinos (2025), demonstrating an active M&A advisory practice for SME and mid-market transactions. The firm is associated with the Alliuris international legal alliance since 2011/2012 to service clients with multi-jurisdictional needs. Recognized by Best Lawyers (Top Tier Firm 2026) and Legal 500, the firm operates standard legal practice management and document systems with a Virtual Office portal (Microsoft-based remote access for AML-compliance registered office services), a multi-language website (English, Spanish, Catalan, French), and pro bono engagements as part of its corporate social responsibility program.

Name

4|5|3 Law Firm

Legal name

FOUR FIVE THREE LAW FIRM, SAP

Website

https://453legal.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

4|5|3 Law Firm is an independent Spanish law firm headquartered in Barcelona with a second office in Madrid, providing corporate, tax, labor, litigation, IP, and international legal advisory to Spanish and international mid-market and enterprise clients across nine practice areas and seven sector desks.

Ownership category

akta.pro rank

Product category

Legal Services

NAICS

Offices of Lawyers (541110)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Corporate & Commercial Law (BPAHAAAA)

akta.pro secondary industries

Mergers & Acquisitions (M&A) & Securities Law (BPAHAAAI), Employment & Labor Law (BPAHAAAD), White-Collar Defense & Investigations (BPAHAAAJ)

Keywords

• Legal advisory services
• Corporate law
• Mergers and acquisitions
• Intellectual property law
• Tax advisory

Headquarters

HQ city

Barcelona

HQ country

Spain

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Infrastructure, Others

Revenue model

1. Legal Advisory Services: The firm generates revenue through providing comprehensive legal advisory services across multiple practice areas including Corporate & M&A, Tax, Labour and Employment Law, Litigation and Arbitration, Entrepreneurship and Innovation, White Collar Crime, Intellectual Property, IT Privacy and Data Protection, and International Law. Services are provided to national and international clients on a fee-for-service basis.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

4|5|3 Law Firm is a Spanish independent law firm (SAP) that provides comprehensive legal advisory services across nine practice areas: Corporate & M&A, Tax, Labour and Employment Law, Litigation and Arbitration, Entrepreneurship and Innovation, White Collar Crime, Intellectual Property, IT/Privacy and Data Protection, and International Law. The firm advises national and international businesses, public organizations, and institutions on transactional, advisory, and dispute resolution matters, with offices in Barcelona and Madrid and international reach through the Alliuris network.

Product overview

4|5|3 Law Firm is an independent Spanish law firm offering comprehensive legal services through multiple practice areas and sector specializations. The firm operates as a unified legal services provider with practice areas including Corporate & M&A, Tax, Labor and Employment Law, Litigation and Arbitration, Intellectual Property, IT/Privacy, and International Law. Services are organized by both practice areas and industry sectors (Family Business, Venture Capital, TMT, Life Sciences, Energy, Real Estate, and Foundations/NGO). The firm also provides ancillary services including a newsletter subscription, virtual office services, and pro bono legal work. Founded in Barcelona in 2000, the firm has offices in Barcelona and Madrid and serves both national and international clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Corporate & M&A Legal Advisory Legal advisory for mergers and acquisitions, corporate restructuring, commercial transactions, and cross-border deals, advising buyers, sellers, and shareholders through the full deal lifecycle.

Quantifiable outcome

• 100% service quality guarantee as stated by the firm

Named customers3 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Alliuris GroupcoreStrategic or Co-development Partner · 1 January 20124|5|3 Law Firm partnered with the Alliuris international network in 2012, expanding its global reach and capabilities to serve clients with international operations across multiple jurisdictions through the alliance of independent law firms.

Scale indicators4 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• CMS Albiñana & Suárez de Lezo: Spanish arm of CMS global law firm network offering full-service corporate, M&A, tax, and disputes work. Comparable multi-disciplinary offering but with the international network depth that 4|5|3 seeks to access through Alliuris.
• Garrigues: Largest Spanish law firm and a leading Iberian player, offering full corporate, tax, labor, litigation, and IP services. Former employer of several 4|5|3 partners; competes for the same Spanish mid-market and upper-mid-market clients but at materially greater scale.
• Uría Menéndez: Top-tier Iberian law firm with strong corporate, M&A, tax, and disputes practices across Spain and Portugal. Competes for premium Spanish mid-market M&A and tax mandates that 4|5|3 also targets, but at significantly greater scale and with broader international network.
• Cuatrecasas: One of Spain's largest law firms with deep corporate, M&A, tax, labor, and disputes practices, plus offices across Iberia and Latin America. Competes for the same Spanish enterprise and mid-market mandates as 4|5|3 but with substantially larger bench and broader geographic footprint.

Direct peers

• Andersen Tax & Legal (Spain): Spanish arm of Andersen Global's tax and legal network, offering corporate, M&A, tax, and labor services with strong mid-market focus. Comparable in service offering and target segment, with international affiliation similar to 4|5|3's Alliuris alliance.
• Gómez-Acebo & Pombo: Spanish full-service independent law firm serving corporate, M&A, tax, labor, and disputes work for national and international clients. Comparable mid-to-upper mid-market Spanish boutique positioning with similar practice area diversity and Iberian focus.
• Pérez-Llorca: Madrid-based Spanish law firm with strong corporate, M&A, tax, and disputes practices serving Spanish and international clients. Comparable boutique-to-mid-tier positioning with similar partner-led model and full-service offering.
• Ramón y Cajal Abogados: Madrid-headquartered Spanish independent law firm providing corporate, M&A, tax, labor, and litigation services. Similar full-service independent model and mid-market focus targeting Spanish enterprises and family businesses.
• Roca Junyent: Barcelona-based independent Spanish law firm of comparable size and full-service model, with similar practice area breadth and Catalan/Spanish market focus. Most directly comparable peer to 4|5|3 in terms of boutique positioning, independence, and multi-disciplinary offering in the Spanish mid-market.
• Sagardoy Abogados: Spain's leading employment and labor law specialist firm, and prior employer of 4|5|3's current Labor practice head Jorge Caballero Álvarez. Comparable Spanish boutique with deep specialist practice; partial overlap in labor practice area.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/453legal
• LinkedInlinkedin.com/company/453lawfirm

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

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 4|5|3 Law Firm