Was Additive Manufacturing hit by ransomware?

Additive Manufacturing was listed by the thegentlemen ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the thegentlemen ransomware group?

thegentlemen is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Additive Manufacturing breach?

thegentlemen published data attributed to Additive Manufacturing. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Additive Manufacturing LLC

listed as Additive Manufacturing · Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedJul 31, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: United States
Sector: Manufacturing
Listed on leak site: Jul 31, 2026

About the victim

AI dossier — public-source company profile

Additive Manufacturing LLC is a US-based contract manufacturer headquartered in Las Vegas, Nevada, specializing in 3D printing, rapid prototyping, and short- to mid-run production of metal and plastic parts. The company offers CNC machining, production tooling, and assembly services supported by a global partner network and on-demand digital factories.

Industry: 3D Printing & Rapid Prototyping; Contract Manufacturing
Address: Las Vegas, Nevada, US

Attack summary

Severity: low — The leak post contains only a listing and company description with no stated proof files, screenshots, or detailed claims about data exfiltration or encryption. No specific sensitive data categories are mentioned.

The ransomware group claims to have attacked Additive Manufacturing LLC and published data. No specific details are provided regarding whether encryption occurred, what data was exfiltrated, or the nature of the disclosure.

low

What the group claims

additivemanufacturingllc.com zoominfo.com/c/additive-manufacturing-llc/369228736 Additive Manufacturing LLC is a U.S.-based company headquartered in Las Vegas, Nevada, specializing in 3D printing, rapid prototyping, and short- to mid-run production of metal and plastic parts. Backed by over a century of combined industry experience, the company bridges digital fabrication and traditional manufacturing, offering services like CNC machining, production tooling, and assembly. By leveraging a global network of partners and on-demand digital factories, they ensure scalable, high-quality, and cost-effective solutions with reliable lead times

Sources

Victim siteadditivemanufacturingllc.com

Source

Indexed 4 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 696 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 31, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 31, 2026Additive Manufacturing listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 696 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,684 disclosures indexed across all operators we track. Geographically, Additive Manufacturing is reported in United States, a country with 3,138 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Additive Manufacturing appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.