Attorneys at Almeida Law Group are investigating whether a class action lawsuit can be filed on behalf of individuals affected by a possible Argentem Creek Partners (investment firm) data breach. According to dark web monitoring sources, a hacker group calling itself N0n claimed responsibility for a cyberattack on Argentem Creek Partners (investment firm) in a post first observed in September 2026, alleging it had gained access to internal company systems. As of this writing, Argentem Creek Partners (investment firm) has not issued a public confirmation of the incident, and the exact scope of any exposed data remains unknown. If you believe you were affected, contact Almeida Law Group.
About Argentem Creek Partners (investment firm)
Argentem Creek Partners is an emerging markets specialist investment firm founded in 2015 by Daniel Chapman. It is an SEC-registered investment adviser focused on special situations, private credit, high yield, trade finance, and structured capital solutions, with a concentration in Latin America, Emerging Asia, and Eastern Europe. The firm is 100% employee-owned and employs approximately 10–50 people, with its primary office in New York, NY, and regional offices in Abu Dhabi, Buenos Aires, and London.
What Happened?
Argentem Creek Partners was listed in a ransomware leak-site allegation reported by Ransomware.live on September 18th, 2026. The claim is attributed to a group calling itself N0n, which posted the listing on a dark web leak site. According to the attacker’s claims, the alleged compromise involves more than 2.5 million connection records, an internal systems map reportedly covering Active Directory, SharePoint, MSP tooling, and office-security integrations, as well as tax-season document workflows and the firm’s investor document delivery platform. The listing carried a stated payment deadline of September 21st, 2026 at 03:01 UTC and claimed that corporate connectivity remained severed pending settlement. These are attacker-side allegations only and have not been confirmed by Argentem Creek Partners, any regulator, or any independent cybersecurity source.
N0n appears to be a newly emerging ransomware group. As of September 18th, 2026, RansomLook data shows the group had posted only nine total claims, including several posted on the same date targeting other organizations such as AstraZeneca Türkiye and the United Federation of Teachers — a pattern consistent with initial burst activity by new or rebranded groups. Ransomware.live itself flagged N0n as an emerging group and stated that its claims should be treated with caution until independently verified. RedPacket Security reported the same listing and noted that no separate compromise date was provided and that no confirmed encryption impact was identified. No independent corroborating sources have confirmed any compromise of Argentem Creek Partners. No class action or litigation connected to this ransomware claim has been identified.
Key Facts at a Glance
- Company or Organization: Argentem Creek Partners (investment firm)
- Industry: Financial Services — Investment Management / Private Credit
- Location: New York, NY (primary); additional offices in Abu Dhabi, Buenos Aires, and London
- Incident type: Ransomware leak-site allegation (unconfirmed)
- Date claim first observed: September 18th, 2026
- Prior breach: No prior cybersecurity incidents found in public reporting
- Litigation status: No litigation connected to this incident; prior unrelated lawsuit (Republic of Kazakhstan, filed June 2020) was dismissed in August 2022 and upheld on appeal in June 2023
- Source: Ransomware.live – Victim: Argentem Creek Partners; RedPacket Security – N0N Ransomware Victim: Argentem Creek Partners; RansomLook – N0n group page
What Should You Do?
Because this incident has not been confirmed by Argentem Creek Partners, there is currently no identity protection enrollment being offered. Even so, it is prudent to take protective steps now. Place a fraud alert or credit freeze with the three major credit bureaus — Equifax, Experian, and TransUnion — and monitor your financial accounts closely for any unauthorized activity. You are entitled to free annual credit reports at AnnualCreditReport.com. If you discover signs of identity theft or fraud, report it and get a recovery plan at IdentityTheft.gov. Continue to watch for any official notice from Argentem Creek Partners, which may provide additional guidance if the incident is confirmed.
Your Legal Rights
If your personal information was involved in this breach, you may have legal rights depending on the facts of the incident and the law in your state. Almeida Law Group represents consumers in data breach and privacy litigation and can help you evaluate whether you may have a claim. Contact us at (708) 529-5418 or through our contact page for a free case evaluation.
