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Siahaan Irdamis Andarumi & Rekan

Indonesia

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Key contacts
Partner: David Siahaan
Partner : Kuntum Apriella Irdam
Partner: Laksmita Andarumi
Quick facts
Number of lawyers

15

Languages

Indonesia, English

Key practice areas
Banking
Project finance
Capital markets : Debt
Capital markets : Equity
Financial and corporate
Investment funds
Restructuring and insolvency
M&A
Project development
Firm overview

SIAHAAN IRDAMIS ANDARUMI & REKAN or SIAR is a boutique legal firm offering comprehensive legal services covering capital markets, merger & acquisition, banking & finance, investment and general corporate matters.

The Firm’s principle is to provide its Clients with practical legal advice which are legally sound and commercially viable for its clients in achieving their business and investment objectives. The Firm delivers results-oriented solutions and offers customized services tailored to clients’ needs. The Firm also specializes in transactional matters that are time sensitive in nature, and require high-level personal attention and a sophisticated approach.

Key transactional practices
  • Banking
  • Capital markets: Debt
  • Capital markets: Equity
  • Capital markets: High yield
  • Financial restructuring
  • M&A
  • Private equity
  • Project finance
  • Restructuring and insolvency
Tel:+6221 - 22513689 Email:Contact Us Web Address:http://www.siarlegal.com/
Rankings published in 2026
M&A
Notable
53 firms ranked
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Tier 1

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Tier 2

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Makarim & Taira S
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Oentoeng Suria & Partners
8 practice areas
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PwC Legal Indonesia
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Tier 3

Armand Yapsunto Muharamsyah & Partners
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Bagus Enrico & Partners
6 practice areas
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Christian Teo & Partners
4 practice areas
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Hutabarat Halim & Rekan Lawyers
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Leks & Co
3 practice areas
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Roosdiono & Partners
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Tier 4

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Suria Nataadmadja & Associates
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William Hendrik & Siregar Djojonegoro
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Project finance
Notable
23 firms ranked
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Tier 1

ABNR Counsellors at Law
11 practice areas
View full profile
Assegaf Hamzah & Partners
11 practice areas
View full profile
HHP Law Firm
11 practice areas
View profile

Tier 2

Hiswara Bunjamin & Tandjung
10 practice areas
View profile
Makarim & Taira S
10 practice areas
View full profile
Oentoeng Suria & Partners
8 practice areas
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SSEK Law Firm
10 practice areas
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Tier 3

Dentons HPRP
10 practice areas
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Hendra Soenardi
10 practice areas
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Makes & Partners
10 practice areas
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Mochtar Karuwin Komar
10 practice areas
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Soemadipradja & Taher
10 practice areas
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UMBRA
9 practice areas
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William Hendrik & Siregar Djojonegoro
6 practice areas
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Notable

Budiarto Law Partnership
8 practice areas
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Hutabarat Halim & Rekan Lawyers
11 practice areas
View full profile
Roosdiono & Partners
8 practice areas
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Siahaan Irdamis Andarumi & Rekan
9 practice areas
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TnP Law Firm
10 practice areas
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Wiriadinata & Saleh
10 practice areas
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Restructuring and insolvency
Tier 4
37 firms ranked
View full list

Tier 1

Assegaf Hamzah & Partners
11 practice areas
View full profile
HHP Law Firm
11 practice areas
View profile
Hiswara Bunjamin & Tandjung
10 practice areas
View profile
SSEK Law Firm
10 practice areas
View profile

Tier 2

ABNR Counsellors at Law
11 practice areas
View full profile
Makarim & Taira S
10 practice areas
View full profile
Makes & Partners
10 practice areas
View full profile

Tier 3

Armand Yapsunto Muharamsyah & Partners
10 practice areas
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Budidjaja International Lawyers
6 practice areas
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Dentons HPRP
10 practice areas
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Hotman Paris & Partners
1 practice area
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Hutabarat Halim & Rekan Lawyers
11 practice areas
View full profile
Mochtar Karuwin Komar
10 practice areas
View profile
Oentoeng Suria & Partners
8 practice areas
View profile
Soemadipradja & Taher
10 practice areas
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UMBRA
9 practice areas
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Tier 4

ANSS Counsellors at Law
4 practice areas
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FKNK Law Firm
7 practice areas
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Kyora Law Firm
4 practice areas
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SIP Law Firm
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Siahaan Irdamis Andarumi & Rekan
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Siregar Setiawan Manalu Partnership
3 practice areas
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2 practice areas
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Bagus Enrico & Partners
6 practice areas
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Dewi Djalal & Partners Law Office
2 practice areas
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Hendra Soenardi
10 practice areas
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KARNA Partnership
3 practice areas
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MHMS Advocates
1 practice area
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Munde Herlambang & Partners
2 practice areas
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Nusantara DFDL
3 practice areas
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Roosdiono & Partners
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Suhardi Somomoeljono & Associates
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Linked Reviews
Financial and corporate

Active since 2015, Siahaan Irdamis Andarumi & Rekan is a boutique law firm with an office in Jakarta. Key figures include partners David Siahaan, Kuntum Apriella Irdam and Laksmita Andarumi.

The firm is noted for its banking and finance, corporate and M&A, project development and restructuring and insolvency work. Sectors of focus include industrial and manufacturing, transport, energy, real estate and healthcare.

 

Highlights 

During the research period, the firm maintained an active M&A practice, handling cross-border and domestic strategic transactions for both buyers and sellers. Key mandates included advising Mineral Mas Abadi and Mitra Mas Investama on a multi-stage corporate group formation and representing Formosa Plastics Indonesia in the sale of a land and factory asset to Sariguna Primatirta.

In project finance, the team primarily advised borrowers, notably assisting Cimanggis Cibitung Tollways in securing a loan facility from Indonesia Infrastructure Finance. This transaction supported the vital JORR S2 toll road, a 110.8 km national strategic project connecting Cengkareng to Tanjung Priok.

 

Key clients 

Mineral Mas Abadi, Mitra Mas Investama, Wahana Newbury Sira, Sariguna Primatirta, Aneka Citra Refrindo, Cimanggis Cibitung Tollways, Air Bandung Timur, O-Bank, Bosowa Multi Finance

 

Testimonials

Banking

“SIAR was among those shortlisted by the lender. We found them to be the most approachable and best aligned with our needs, particularly in terms of commercial sensibility and timely project delivery. Their teams consist of project financing specialists with strong expertise in both commercial and technical.”

“The firm has in-depth understanding of banking and finance transactions, particularly in complex syndicated loan structures for infrastructure projects. Their team demonstrated strong legal expertise, responsiveness, and a solutions-oriented mindset throughout the process. We appreciated their ability to break down complex legal terms into practical advice, which greatly facilitated our internal decision-making.”

“Their professionalism, attention to detail, and ability to coordinate with various stakeholders, including banks, notaries, and our internal departments, ensured the smooth execution of the project. Their familiarity with regulatory frameworks and practical experience made them a valuable legal partner for us in navigating the transaction efficiently and in compliance with all requirements.”

 

M&A

“Has good knowledge of corporate acquisition. Quick and fast response for any inquiries.”

“The team is highly professional, expert, and resourceful, distinguished by their helpful nature, fast response times, and strong sense of responsibility.

The team provides dedicated support to all Bosowa companies for their offshore transactions and IPO preparations.”

 

Fidi Hania

“Fidi Hania was the main contact from SIAR during our financing project. Her knowledge and expertise as the main contact between us as the borrower and the lender was appreciated.”

 

Ella Irdamis

“Expertise in merger and acquisition, banking finance and loan restructuring.”

 

N. R. Zela Syah Putri             

“She is very responsive.”

“She provides fast responses and proper answers to all my inquiries.”

 

David Siahaan

“He demonstrates strong expertise in corporate law and excellent problem-solving skills. He is highly responsible and consistently provides quick, effective responses.”

“Quick response. Good in corporate law acknowledgement.”

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