active Legal form GmbH

Stackforest GmbH

Villingen-Schwenningen ·HRB 730791 Freiburg ·stackforest.de

Part 1 / 2

Structured data

Parsed, typed and queryable directly through the API.

Overview

Legal form: GmbH
Address: Luisenstraße 7
78048 Villingen-Schwenningen
Commercial register: HRB 730791, Freiburg
Registration date: May 22, 2023
Industry: Ingenieurbüros für Fachplanung von technischer Gebäudeausrüstung
Erbringung von Dienstleistungen für Forstwirtschaft und Holzeinschlag
Wärme- und Kältehandel
Purpose: Die Einbindung von Hochleistungsrechnern (Bitcoin Mining) als Wärmequelle für Industriegebäude, insbesondere die Planung, den Bau, die Wartung und den Betrieb dieser. Hauptaugenmerk liegt auf einer hocheffizienten Abwärmenutzung. Darüber hinaus bietet das Unternehmen umfassende Ingenieurdienstleistungen in den Bereichen Energieberatung, Prozessmanagement, dezentrale Energieerzeugung und Energiespeicherung an. Schließlich bietet es Leasing (Gebrauchüberlassung) und den Verkauf von Hochleistungsrechnern und zugehöriger Hardware an.

Financials

Why are there no figures?

German corporations such as GmbH, UG and AG must file their annual statement with the Unternehmensregister (the federal company register) within twelve months of the end of the fiscal year. For this company, however, no statement from which key figures could be derived is on file there.

Who has to publish what?

What must be published depends on company size, measured by total assets, revenue and headcount: a company belongs to a size class when it stays below two of the three limits on two consecutive balance-sheet dates. Current limits:

Micro-companies up to €450,000 total assets · €900,000 revenue · 10 employees
Only deposit a balance sheet, which is not publicly viewable. No figures appear here.
Small companies up to €7.5 million total assets · €15 million revenue · 50 employees
Publish an abridged balance sheet without a profit and loss statement. Revenue and net income are then missing.
Medium-sized companies up to €25 million total assets · €50 million revenue · 250 employees
Publish the balance sheet and an abridged profit and loss statement.
Large companies (above that)
Publish the full annual statement including the management report.

Sole traders and partnerships with a natural person as fully liable partner (such as GbR, OHG or a classic KG) are not required to disclose at all. Figures then only exist if they were published voluntarily.

Other typical reasons:

The company was dissolved, merged, liquidated or is insolvent. After that, statements are usually no longer published.
The filing was missed or is late. The Federal Office of Justice then imposes fines, but publication often still happens years later.

As soon as a statement is published, it will appear here.

No annual statement from which key figures could be derived has been published for this company. For small companies that is the normal case – not every company has to disclose figures.

Authorized representatives

Dominik Frank Stegmann since 2024 Managing Director
Mark Kempa since 2025 Managing Director
Tim Kempa since 2024 Managing Director

Ownership & holdings

Shareholders

Coincidence UG (haftungsbeschränkt) DEU Amtsgericht Freiburg i.Br., HRB 727570 50.0 % 13k €
Wandafitz & Friends UG (haftungsbeschränkt) DEU Amtsgericht Freiburg i.Br., HRB 727461 25.0 % 6k €
Mark Kempa 25.0 % 6k €

Ultimate beneficial owners (UBOs)

2 hold ≥ 25%

T** K**** ≥25% 25.5 %
M*** K**** ≥25% 25.0 %

3 more beneficial owners · viewable with an API key Get API key →

History

2025
07.01.

Member entry

Mark Kempa · Managing Director
07.01.

Change of representation scheme

Ist nur ein Geschäftsführer bestellt, vertritt er allein. Sind mehrere Geschäftsführer bestellt, vertreten zwei gemeinsam oder ein Geschäftsführer mit einem Prokuristen. Einzelvertretungsbefugnis kann erteilt werden. Die Geschäftsführer können von den Beschränkungen des § 181 BGB allgemein befreit werden.
2024
11.04.

Change of legal form

Gesellschaft mit beschränkter Haftung
11.04.

Change of company name

Stackforest GmbH
11.04.

Member entry

Dominik Frank Stegmann · Managing Director
11.04.

Member entry

Tim Kempa · Managing Director
11.04.

Change of seat

Stackforest GmbH
11.04.

Incorporation

Stackforest GmbH

4 more entries Get API key →

Part 2 / 2

Raw data & documents

Original filings, full-text markdown and PDFs — full content via the API.

Register documents

PDF documents straight from the court register — fetched on demand via the :code endpoint.

Current extract (AD)
Chronological extract (CD)
Structured content (SI, XML)
Shareholders list
Articles of association

Unlock with API key Get API key →

Website content

Structured markdown rendering of the company's public website — perfect for enrichment and AI pipelines.

stackforest.de AI

Unlock with API key Get API key →

Live API

GEThandelsregister.ai/api/v1/fetch-organization

?q=2c98ba7ef164d131fc5f6debc7bb034e

&features=related_persons

&features=shareholders

&features=ubos

&features=history

curl -H 'X-API-KEY: YOUR_API_KEY' \
  "https://handelsregister.ai/api/v1/fetch-organization?q=2c98ba7ef164d131fc5f6debc7bb034e&features=related_persons&features=shareholders&features=ubos&features=history"

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
organization = client.fetch_organization(
    q="2c98ba7ef164d131fc5f6debc7bb034e",
    features=[
        "related_persons",
        "shareholders",
        "ubos",
        "history",
    ],
)
print(organization["name"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const organization = await client.fetchOrganization({
  q: '2c98ba7ef164d131fc5f6debc7bb034e',
  features: [
    'related_persons',
    'shareholders',
    'ubos',
    'history',
  ],
});
console.log(organization.name);

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const organization = await client.fetchOrganization({
    q: '2c98ba7ef164d131fc5f6debc7bb034e',
    features: [
      'related_persons',
      'shareholders',
      'ubos',
      'history',
    ],
  });
  console.log(organization.name);
})();

{
    "entity_id": "<32-char hex>",
    "name": "<string>",
    "status": "<enum: ACTIVE | TERMINATED | DISSOLVED | INSOLVENT>",
    "legal_form": "<string>",
    "address": {
        "house_number": "<string>",
        "street": "<string>",
        "postal_code": "<string>",
        "city": "<string>",
        "county": "<string>",
        "state": "<string>",
        "country": "<ISO country>",
        "coordinates": {
            "latitude": "<float>",
            "longitude": "<float>"
        }
    },
    "registration": {
        "court": "<string>",
        "register_type": "<string>",
        "register_number": "<string>"
    },
    "registration_date": "<ISO date>",
    "purpose": "<string>",
    "keywords": [],
    "products_and_services": [],
    "contact_data": {
        "website": "<URL>",
        "phone_number": null,
        "email": null
    },
    "industry_classification": {
        "WZ2008": [],
        "WZ2025": [
            {
                "code": "<string>",
                "label": "<string>"
            }
        ]
    },
    "seat": {
        "city": "<string>"
    },
    "shareholders": {
        "total_capital": {
            "amount": "<float>",
            "currency": "<ISO currency>"
        },
        "entries": [
            {
                "shareholder": {
                    "entity_id": "<32-char hex>",
                    "entity_name": "<string>",
                    "address": "<string>",
                    "country_code": "<ISO country>",
                    "registration_reference": "<string>"
                },
                "contribution": {
                    "amount": "<float>",
                    "currency": "<ISO currency>"
                },
                "contribution_ratio": "<float>",
                "role": {
                    "label": "<string>",
                    "en": {
                        "long": "<string>",
                        "short": "<string>"
                    },
                    "de": {
                        "long": "<string>",
                        "short": "<string>"
                    }
                }
            }
        ],
        "history": {
            "redacted": "<bool>"
        }
    },
    "annual_financial_statements__html": [],
    "balance_sheet_accounts": [],
    "financial_kpi": [],
    "ubos": {
        "beneficial_owners": [
            {
                "person": {
                    "entity_id": "<32-char hex>",
                    "name": "<string>",
                    "birth_date": null,
                    "name_parts": {
                        "given": "<string>",
                        "family": "<string>",
                        "canonical_name": "<string>"
                    },
                    "location": {
                        "home": {
                            "city": "<string>",
                            "county": "<string>",
                            "state": "<string>",
                            "country": "<ISO country>"
                        }
                    }
                },
                "ownership_percentage": "<float>",
                "paths": [
                    {
                        "percentage": "<float>",
                        "via": [
                            {
                                "depth": "<int>",
                                "name": "<string>",
                                "entity_id": "<32-char hex>",
                                "step_percentage": "<float>"
                            }
                        ]
                    }
                ]
            }
        ],
        "unresolved_beneficial_owners": [],
        "coverage": {
            "resolved_percentage": "<float>",
            "unresolved_percentage": "<int>"
        }
    },
    "profit_and_loss_account": [],
    "shareholdings": null,
    "representation_scheme": {
        "current": [
            "<string>"
        ],
        "history": [
            {
                "value": [
                    "<string>"
                ],
                "effective_from": "<string>",
                "effective_to": null
            }
        ]
    },
    "related_persons": {
        "current": [
            {
                "entity_id": "<32-char hex>",
                "label": "<string>",
                "role": {
                    "en": {
                        "long": "<string>",
                        "short": "<string>"
                    },
                    "de": {
                        "long": "<string>",
                        "short": "<string>"
                    }
                },
                "name": "<string>",
                "start_date": "<ISO date>",
                "end_date": null,
                "birth_date": null,
                "name_parts": {
                    "given": "<string>",
                    "family": "<string>",
                    "maiden": null,
                    "canonical_name": "<string>",
                    "previous_names": null
                },
                "location": {
                    "home": {
                        "city": "<string>"
                    }
                },
                "organization_representation_scheme": {
                    "current": [
                        "<string>"
                    ],
                    "history": [
                        {
                            "value": [
                                "<string>"
                            ],
                            "effective_from": "<string>",
                            "effective_to": null
                        }
                    ]
                },
                "role_representation_scheme": {
                    "current": [
                        "<string>"
                    ],
                    "history": [
                        {
                            "value": [
                                "<string>"
                            ],
                            "effective_from": "<string>",
                            "effective_to": null
                        }
                    ]
                }
            }
        ],
        "past": []
    },
    "capital": {
        "current": {
            "amount": "<float>",
            "currency": "<ISO currency>",
            "kind": "<string>"
        },
        "history": [
            {
                "value": {
                    "amount": "<float>",
                    "currency": "<ISO currency>",
                    "kind": "<string>"
                },
                "effective_from": "<string>",
                "effective_to": null
            }
        ]
    },
    "history": [
        {
            "entity_type": "<string>",
            "name": {
                "en": "<string>",
                "de": "<string>"
            },
            "description": {
                "short": {
                    "en": "<string>",
                    "de": "<string>"
                }
            },
            "start_date": "<ISO date>",
            "details": {
                "value": "<string>",
                "linked_entities": {
                    "organization": {
                        "name": "<string>"
                    }
                }
            }
        }
    ]
}

Base fields

entity_id string

Stable handelsregister.ai identifier (32-char hex string).

name string

Registered legal name of the entity.

status enum

ACTIVE, TERMINATED, DISSOLVED or INSOLVENT.

legal_form string

Legal form (GmbH, AG, KG, …) when available.

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates.

registration object

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

representation_scheme object

General representation scheme: { current: [...], history: [...] } with effective_from/effective_to per version.

capital object

Registered capital: { current, history }. current carries amount, currency and kind (STAMMKAPITAL, GRUNDKAPITAL, HAFTSUMME, GENEHMIGTES_KAPITAL, BEDINGTES_KAPITAL, VARIABLES_KAPITAL — open enum); each history entry has value, effective_from and effective_to (null = still in force). change_amount on a history entry is unsigned and does not always equal the difference between two consecutive amounts, so derive increases and decreases from the amounts. Partnerships and other entities without registered capital return current: null and an empty history.

contact_data object

website, phone_number and email when available.

industry_classification object

Industry codes per WZ2008 and WZ2025 with labels.

keywords array<string>

Keywords derived from the business purpose.

products_and_services array<string>

Product and service descriptions when available.

history array<object>

Chronological log of all register changes (name, seat, capital, representation, …).

features=financial_kpi

financial_kpi array<object>

Per fiscal year: revenue, employees, active_total (balance-sheet total), net_income, material_expenses, personnel_expenses.

features=balance_sheet_accounts

balance_sheet_accounts array<object>

Per fiscal year: hierarchical balance-sheet line items from the published annual statement.

features=profit_and_loss_account

profit_and_loss_account array<object>

Per fiscal year: hierarchical profit-and-loss line items.

features=related_persons

related_persons object

Authorized representatives: { current: [...], past: [...] } — managing directors, board members, signatories. Each person carries organization_representation_scheme and role_representation_scheme (current scheme + history).

features=shareholders

shareholders object

Shareholders: { total_capital, entries: [...], history: { current_as_of, past: [...] } }. Each entry carries shareholder, contribution, contribution_ratio and role; history.past delivers previous shareholder lists with an as_of date. total_capital, contribution and contribution_ratio may be null (e.g. for partnerships).

features=ubos

ubos object

Ultimate beneficial owners: { beneficial_owners, unresolved_beneficial_owners, coverage } as recorded in the transparency register.

features=shareholdings

shareholdings object

Stakes this entity holds in others: { holdings: { current: [...] }, summary }. Each holding links another organization by entity_id.

features=publications

publications array<object>

Official commercial-register publications (date, title, full text).

features=annual_financial_statements__html

annual_financial_statements__html array<object>

Published annual statements with document_html (rendered HTML), document_type, document_title, document_date, language and year.

AI assistants

This company in Claude or ChatGPT

Connect handelsregister.ai to your AI assistant once – then simply ask it about this and any other company.

All MCP tools in the documentation →

In Claude, go to Settings → Connectors → “Add custom connector”.
Enter this server URL: https://mcp.handelsregister.ai/mcp
Sign in with your handelsregister.ai account in the dialog. The connector is then available in every chat under “Tools”.

In ChatGPT, go to Settings → Connectors → Advanced, enable Developer mode and choose “Create”.
Enter the name “handelsregister”, authentication OAuth and this server URL: https://mcp.handelsregister.ai/mcp
Sign in with your handelsregister.ai account in the dialog and enable the connector in the chat under “More”.

Run once in your terminal:

claude mcp add --transport http handelsregister https://mcp.handelsregister.ai/mcp \
  --header "X-API-Key: YOUR_API_KEY"

Done – the server is now available in every Claude Code session.

For your own applications: pass the server as a tool, authenticated with your API key.

from openai import OpenAI

client = OpenAI()
response = client.responses.create(
    model="gpt-6-astra",
    input="Stackforest GmbH: Geschäftsführung, Gesellschafter, Kennzahlen?",
    tools=[{
        "type": "mcp",
        "server_label": "handelsregister",
        "server_url": "https://mcp.handelsregister.ai/mcp",
        "headers": {"X-API-Key": "YOUR_API_KEY"},
        "require_approval": "never",
    }],
)
print(response.output_text)

Cursor, Windsurf and other MCP clients: add this block to the MCP configuration.

{
  "mcpServers": {
    "handelsregister": {
      "url": "https://mcp.handelsregister.ai/mcp",
      "headers": { "X-API-Key": "YOUR_API_KEY" }
    }
  }
}

Replace YOUR_API_KEY with your key – once you are signed in it is filled in here automatically.

Try it in the chat:

What do you know about Stackforest GmbH? Use entity_id 2c98ba7ef164d131fc5f6debc7bb034e and show me the management, shareholders and the latest key figures.

Profile · Financials · People · Documents

Structured data and full text — per company

From annual statements as HTML to UBO lists: enable each field individually via the features parameter. One API, all data.

Key figures Revenue, employee count, total assets, net income — per fiscal year.
Authorized representatives Current and former managing directors, board members, signatories — with roles and date ranges.
Publications Official commercial register publications including date and full text.
Gesellschafter Current shareholder structure with stakes and contributions.
Wirtschaftlich Berechtigte (UBOs) Ultimate beneficial owners as recorded in the German transparency register.
Beteiligungen Stakes this company holds in other entities.
Bilanz Full balance sheet line items from published annual statements.
Gewinn- und Verlustrechnung P&L line items per fiscal year.
Jahresabschlüsse (HTML) Published annual financial statements rendered as HTML.
Insolvenzbekanntmachungen Notices from the official insolvency registers.
News Recent mentions of the company from external news sources.

Unlock every field with an API key Get API key →

Code · AI agents · No-code · Workflows

Plug into any stack

Whether you're building a classical API integration, an AI agent, or a no-code workflow — this data slots in.

REST API Plain GET request with an X-API-KEY header. Works with any HTTP client. Python Works with requests, httpx, or your library of choice. Node.js Standard fetch or axios — no extra SDK required. MCP Server Plug directly into Claude, Cursor, or any MCP-capable AI client. n8n Drop-in custom node for n8n workflow automations. Webhook Callable from Zapier, Make, or any webhook platform.

Use this data in your app

Grab an API key and pull this structured commercial register data straight from your application — no scraping, no PDFs.

Get API key