Hartamulya Andryanus & Siahaan Attorneys at Law



Dispute resolution

Hartamulya Andryanus Siahaan is a litigation boutique that handles the full range of contentious matters. Areas of commercial dispute expertise include business dissolutions, IP rights, real estate, insolvency, tax and private client. The firm is also regularly engaged for white-collar crime cases, such as those related to financial crimes, money laundering, embezzlement, fraud and cyber crimes.

Partner Rio Andre Winter Siahaan runs the disputes team. His focus is on commercial disputes and white-collar crime defence.

The team is currently representing nickel mine repository Aneka Nusantara Internasional in a complex and multifaceted dispute involving the ownership of shares and company control. This case has spiralled into criminal charges and other civil lawsuits brought against its client.

In another high stakes matter, Siahaan and his team are defending domestic insurer Asuransi Central Asia against claims totalling more than $1 billion made by shipping company Gerrindo Surya Makmur relating to lost and damaged cargo.

On the IP side, a startup tech company enlisted the firm for its trademark rights dispute with another local digital-based household service tech company.

Additional active clients include IndoJapan Steel Center and Rahayu Santosa.

Client feedback

“So far this law firm has been consistently providing professional service to us. Its service has been very satisfactory.” – Commercial and transactions

“The partners give very well-constructed advice and solutions. They are able to educate clients regarding the law.” – Commercial and transactions


Rio Andre Siahaan

“He did extremely well in our litigation proceeding. He won our legal case in the court.”

“Well-educated and an expert in multi-disciplined business cases.”