Siguion Reyna Montecillo & Ongsiako

What Siguion Reyna Montecillo & Ongsiako does

Siguion Reyna Montecillo & Ongsiako (SRMO) is a full-service Philippine law firm founded in 1901 and headquartered at BDO Towers Paseo, 8741 Paseo de Roxas, Makati City. It is described as the oldest continuously operating law office in the Philippines and operates as a private partnership with 51–100 employees organized across General Partners, Senior Partners, Partners, Associates, and Of Counsel. The firm serves two principal client cohorts: (i) Fortune 500 multinational corporations from the United States, Canada, the United Kingdom, Germany, Sweden, Italy, Japan, Malaysia, Singapore, and Hong Kong doing business in or with the Philippines, and (ii) the Philippines' Top 200 domestic corporations across industries including airlines, banking, manufacturing, telecommunications, media, mining, and power/utilities. The firm states that some client relationships have been continuous since the early 1900s.

The firm's practice spans twelve named areas: Arbitration/Alternative Dispute Resolution and Litigation; Aviation; Banking and Insurance; Computer, Internet and Data Privacy; Corporate, Project Development, Securities and Finance; Commercial Litigation and Financial Rehabilitation; Immigration; Intellectual Property; Labor and Employment; Energy, Mining and Natural Resources; Real Estate Transactions; and Tax and Estate Planning. Selected mandates include Issuer's Counsel for Toyota Financial Services Philippines' ₱5-billion Fixed Rate Bond issuance and listing on PDEx (the first draw under a ₱20-billion bond programme), CIAC construction disputes with commercial values of ₱125 million to ₱3 billion, and representation of a German airport operator before the ICSID. There is no proprietary technology platform; the firm's product is professional legal expertise delivered through partner- and associate-led engagements.

SRMO operates as a professional services partnership on a fee-for-matter basis, with fees determined by matter complexity, lawyer seniority, and time required — no fee schedule is publicly disclosed. Revenue figures are not publicly reported. The go-to-market is enterprise field sales: long-tenured client relationships, direct business development into corporates, referral networks, and ecosystem participation (Integrated Bar of the Philippines, where Senior Partner Antonio C. Pido served as President from July 2023 to June 2025; ALB In-House Legal Summit; TMAP forums; SCLP and PDRC conferences). Strategic alliances include a 2026 MoA with the Department of Migrant Workers (the first such partnership with a private firm) and partnerships with international arbitration bodies (PDRC, CIAC, ICSID, PCA).

Name

Siguion Reyna Montecillo & Ongsiako

Legal name

Siguion Reyna, Montecillo & Ongsiako

Website

https://srmo-law.com

Company type

Private

Founded year

1901

Operating status

Operating

Headcount range

51–100 employees

Short description

Siguion Reyna Montecillo & Ongsiako (SRMO) is the oldest continuously operating Philippine law firm (founded 1901), providing full-service legal counsel to Fortune 500 multinationals and the country's Top 200 corporations across corporate, litigation, arbitration, labor, tax, IP, banking, aviation, mining, and real estate matters.

Ownership category

akta.pro rank

Product category

Legal Services

NAICS

Offices of Lawyers (541110), Offices of Lawyers (54111), Legal Services (5411)

SIC

Services-Legal Services (8111)

akta.pro primary industry

IP Litigation & Dispute Resolution (BPAHAMAE)

akta.pro secondary industries

Patent Prosecution & Portfolio Management (BPAHAMAA), Family & Private Client (Trusts & Estates) Law (BPAHAAAK), Tax Planning & Compliance for Family Offices (FSAAADAE)

Keywords

• Corporate legal services
• Commercial litigation
• Arbitration and dispute resolution
• Mergers and acquisitions law
• Intellectual property law

Headquarters

HQ city

Makati

HQ country

Philippines

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Legal Services - Professional Fees: SRMO generates revenue through professional legal fees for comprehensive legal services covering corporate and commercial law, litigation, arbitration, labor law, tax, intellectual property, banking, insurance, real estate, aviation, mining, and more. Fees are structured based on the nature, complexity, and duration of legal matters handled.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

SRMO is a full-service law firm providing comprehensive legal services across corporate and commercial law, litigation, arbitration, labor and employment, tax, intellectual property, banking, insurance, real estate, aviation, mining, immigration, and data privacy. The firm serves Philippine Top 200 corporations and Fortune 500 multinational clients through advisory, transactional, and contentious representations before Philippine courts, quasi-judicial bodies, and international arbitration forums. Fees are structured based on the nature, complexity, and duration of each legal matter.

Product overview

Siguion Reyna Montecillo & Ongsiako (SRMO) is a full-service law firm offering a comprehensive portfolio of legal practice areas rather than a unified software product or platform. The firm's services are organized as distinct practice groups covering Arbitration/Litigation, Aviation, Banking & Insurance, Data Privacy, Corporate/M&A, Commercial Litigation, Immigration, Intellectual Property, Labor & Employment, Energy/Mining, Real Estate, and Tax & Estate Planning. Clients engage SRMO for specialized legal expertise across these domains, with lawyers serving as advisors, advocates, and counsel in both advisory and contentious matters.

Differentiator

Problem solved

Functional benefit

Products and services

• Arbitration, Alternative Dispute Resolution and Litigation Services
• Aviation Law Practice
• Banking and Insurance Practice
• Computer, Internet and Data Privacy Law Practice
• Corporate, Project Development, Security and Finance Practice
• Commercial Litigation and Financial Rehabilitation Practice
• Immigration Law Practice
• Intellectual Property Law Practice
• Labor and Employment Law Practice
• Energy, Mining and Natural Resources Practice
• Real Estate Transactions Practice
• Tax and Estate Planning Practice

Quantifiable outcome

• Some clients have been with SRMO since the early part of last century (since early 1900s)

Named customers8 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Eleven partnerships are on record, tiered major, core and minor.

• Department of Migrant Workers (DMW)majorStrategic or Co-development Partner · 10 April 2026MoA partnership dedicated to expanding legal aid for Overseas Filipino Workers (OFWs). SRMO committed to providing timely legal assistance, rights protection, and institutional support to OFWs. First partnership of its kind between DMW and a private law firm for this purpose.
• Philippine Dispute Resolution Center (PDRC)coreStrategic or Co-development Partner · 21 July 2025SRMO lawyers Broderick C. Arcilla and Maria Luisa J. Sebastian inducted as regular members and trained arbitrators of PDRC. Firm committed to improving arbitration and mediation services in construction, insurance, securities, and intellectual property.
• Construction Industry Arbitration Commission (CIAC)coreStrategic or Co-development PartnerSRMO has represented clients in CIAC disputes involving termination of construction contracts, EOT claims, delays, variation costs, payments, quality of works, liquidated damages, and completion costs with commercial values ranging from Php125 million to Php3 billion.
• Society of Construction Law Philippines (SCLP)coreStrategic or Co-development PartnerSRMO actively participates in SCLP events including National Conventions and seminars. Partners regularly attend to enhance expertise in construction law and arbitration. Firm represented at conferences covering BIM, collaborative contracting, dispute avoidance, and foreign contractor regulations.
• Tax Management Association of the Philippines (TMAP)coreStrategic or Co-development PartnerSRMO Tax Department participates in TMAP events including the 2025 Tax Forum and first International Tax Summit. Attys. Raegan L. Capuno and Carlos Nicole J. Recto represent the firm. TMAP is the premier organization of tax practitioners in the Philippines.
• Asian Patent Attorneys Association (APAA)minorStrategic or Co-development PartnerSRMO participated in the 76th Council Meeting of APAA (2024 APAA Conference) held at Conrad Hotel, Pasay City. Firm engages with patent attorneys from North America, Europe, and Japan for intellectual property matters.
• International Centre for Settlement of Investment Disputes (ICSID)coreStrategic or Co-development PartnerSRMO served as Philippine counsel for an international German airport operator pursuing investment arbitration through the ICSID process of the World Bank.
• Permanent Court of Arbitration (PCA)coreStrategic or Co-development PartnerPCA and PDRC signed a cooperation agreement to promote resolution of international disputes through arbitration and ADR methods in the Philippines and Southeast Asia. SRMO attended the forum where this agreement was signed.
• Securities and Exchange Commission (SEC)coreStrategic or Co-development PartnerSRMO supports SEC's eSECnature Campaign and third wave of digital initiatives. Attys. Jocelyn R. Esguerra-Dee and Raymond Lim represented the IBP and SRMO at SEC events. Firm advises on securities regulation and corporate matters.
• Integrated Bar of the Philippines (IBP)coreStrategic or Co-development PartnerSRMO Senior Partner Atty. Antonio C. Pido elected as IBP President (July 2023 - June 2025). Firm regularly participates in IBP activities including legal aid programs and the 20th National Convention of Lawyers.
• Toyota Financial Services PhilippinescoreStrategic or Co-development PartnerSRMO acted as Issuer's Counsel for the issuance and listing of ₱5-billion Fixed Rate Bonds by TFSPH on PDEx. This was the first issuance under TFSPH's ₱20-billion Bond Programme.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Puno & Puno: Philippine full-service firm with comparable M&A, corporate, and litigation practices; another legacy Manila-based firm competing with SRMO for Top 200 corporate mandates.
• Quisumbing Torres: Member firm of Baker McKenzie International in the Philippines, offering full-service corporate and dispute resolution capabilities. A direct competitor for cross-border mandates involving multinational clients served by SRMO.
• Cruz Marcelo & Tenefrancia: Full-service Philippine law firm recognized by Chambers for corporate, M&A, and dispute resolution work, frequently cited alongside SRMO in international rankings.
• ACCRALAW (Angara Abello Concepcion Regala & Cruz): Major Philippine full-service firm consistently ranked in Chambers and ALB top tiers across corporate, M&A, and dispute resolution. Competes directly with SRMO for Fortune 500 and Top 200 mandates.
• Villaraza & Angangco (Villaraza Law): Full-service Philippine firm with strong corporate, M&A, and dispute resolution practices, regularly appearing in the same Chambers/ALB tiers as SRMO.
• SyCip Salazar Hernandez & Gatmaitan: One of the largest and oldest full-service law firms in the Philippines, frequently co-ranked alongside SRMO by Chambers and ALB across M&A, banking, and dispute resolution. Direct head-to-head competitor for Top 200 corporate clients.
• Romulo Mabanta Buenaventura Sayoc & De Los Angeles: Full-service Philippine firm with comparable corporate, M&A, and litigation practices; recognized alongside SRMO in international legal directories. Direct competitor in the same enterprise segment.
• Fortun Narvasa & Salazar: Philippine full-service firm providing corporate, banking, and dispute resolution services; competes with SRMO for institutional and corporate clients in Metro Manila.
• Picazo Buyong Tanato & Balbin: Established Philippine law firm with comparable full-service capabilities across corporate, banking, and litigation; co-listed with SRMO in international directories.
• Gatmaytan Tan Acut & Lopez: Philippine full-service firm focused on corporate, M&A, banking, and dispute resolution; often co-ranked with SRMO in Chambers and ALB for transactional and contentious work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/search/results/all/?keywords=%23srmolaw&origin=HASH_TAG_FROM_FEED

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 Siguion Reyna Montecillo & Ongsiako