active Legal form GmbH

CONSTRUQT GmbH

Mainz ·HRB 43850 Mainz

Handelsregister API View JSON Collapse

{
    "name": "CONSTRUQT GmbH",
    "status": "ACTIVE"
}

Live API

GEThandelsregister.ai/api/v1/fetch-organization

?q=6d75d9017b0608b7b203a988417ad2da

&features=financial_kpi

&features=balance_sheet_accounts

&features=related_persons

&features=shareholders

&features=ubos

&features=history

&features=annual_financial_statements__html

curl -H 'X-API-KEY: YOUR_API_KEY' \
  "https://handelsregister.ai/api/v1/fetch-organization?q=6d75d9017b0608b7b203a988417ad2da&features=financial_kpi&features=balance_sheet_accounts&features=related_persons&features=shareholders&features=ubos&features=history&features=annual_financial_statements__html"

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
organization = client.fetch_organization(
    q="6d75d9017b0608b7b203a988417ad2da",
    features=[
        "financial_kpi",
        "balance_sheet_accounts",
        "related_persons",
        "shareholders",
        "ubos",
        "history",
        "annual_financial_statements__html",
    ],
)
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: '6d75d9017b0608b7b203a988417ad2da',
  features: [
    'financial_kpi',
    'balance_sheet_accounts',
    'related_persons',
    'shareholders',
    'ubos',
    'history',
    'annual_financial_statements__html',
  ],
});
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: '6d75d9017b0608b7b203a988417ad2da',
    features: [
      'financial_kpi',
      'balance_sheet_accounts',
      'related_persons',
      'shareholders',
      'ubos',
      'history',
      'annual_financial_statements__html',
    ],
  });
  console.log(organization.name);
})();

JSON preview

{
    "entity_id": "6d75d9017b0608b7b203a988417ad2da",
    "name": "CONSTRUQT GmbH",
    "status": "ACTIVE",
    "legal_form": "GmbH",
    "registration_date": "2012-01-17T00:00:00+00:00",
    "address": {
        "street": "Mombacher Straße",
        "house_number": "68",
        "postal_code": "55122",
        "city": "Mainz",
        "country": "DEU"
    },
    "registration": {
        "register_type": "HRB",
        "register_number": "43850",
        "court": "Mainz"
    }
}

"purpose": "…"

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"representation_scheme": { … }

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"capital": { … }

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"industry_classification": { … }

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"history": [ … ]

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"financial_kpi": [ … ]

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"related_persons": { … }

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"shareholders": { … }

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"ubos": { … }

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"balance_sheet_accounts": [ … ]

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"annual_financial_statements__html": [ … ]

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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

Register record with court, register_type and register_number.

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.

Overview

Legal form: GmbH
Address: Mombacher Straße 68
55122 Mainz
Commercial register: HRB 43850, Mainz
Registration date: January 17, 2012
Industry: Erbringung von Beratungsleistungen auf dem Gebiet der Informationstechnologie
Architekturbüros für Hochbau
Ingenieurbüros für Fachplanung von technischer Gebäudeausrüstung
Registered capital: 50,000.00 EUR
Representation rules: Ist nur ein Geschäftsführer bestellt, so vertritt er die Gesellschaft allein. Sind mehrere Geschäftsführer bestellt, so wird die Gesellschaft durch zwei Geschäftsführer oder durch einen Geschäftsführer gemeinsam mit einem Prokuristen vertreten.
Purpose: Gegenstand des Unternehmens ist die Tätigkeit im Bereich Projektingenieur-, Projektmanagement- und Planungsbüro, Sachverständigen- und Fachplanungsbüro, Ingenieurdienstleister im Bereich Bauwesen (insbesondere mit Fokus auf Brandschutz, Elektro, Lüftung und Leitungsführung), Übernahme, Steuerung und Abwicklung von Projekten im baulichen Brandschutz, insbesondere im Bereich Rechenzentren, Projektmanagement und Koordination komplexer Bau- und Brandschutzprojekte, Entwicklung digitaler Prozesse, Projektmanagement- und Organisationssystem, Aufbau, Koordination und Steuerung von Subunternehmernetzwerken, Vergabe und Management von Projektleistungen an Subunternehmer, Entwicklung, Aufbau, Halten und Lizenzierung von Marken, Rechten und Beteiligungen an anderen Unternehmen, Projektentwicklung, Zusammenarbeit mit Investoren, Finanzierungs- und Beteiligungsstrukturen sowie Business Angels.

Financials

Total assets 2024

584.673 €

Net income 2024

16.258 €

2 previous years · values unlocked with an API key Get API key →

Balance sheet

2024

Assets 584,7 k

Current Assets 97,9 % 572,4 k
Fixed Assets 2,1 % 12,3 k
Prepaid Expenses 0,0 % 0

Liabilities and Equity 584,7 k

Equity 96,0 % 561,3 k
Provisions 3,7 % 21,4 k
Liabilities 0,8 % 4,4 k
Accrued Expenses 0,4 % −2,5 k

Full balance sheet line items with an API key Get API key →

Balance sheet data available for 2 earlier fiscal years.

Authorized representatives

Florian Dehnhard since 2026 Managing Director
Metin Sahin since 2026 Managing Director

3 former representatives · viewable with an API key Get API key →

Ownership & holdings

Shareholders

FALQN Holding GmbH DEU HRB 53065 AG Mainz 50.0 % 25k €
Stonebase Ventures GmbH DEU HRB 53757 AG Mainz 50.0 % 25k €

Ultimate beneficial owners (UBOs)

3 hold ≥ 25%

M**** S**** ≥25% 50.0 %
C****** D****** ≥25% 25.0 %

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

History

2026
08.06.

Member entry

Florian Dehnhard · Managing Director
08.06.

Exit of position

Bertan Topuz · Managing Director
08.06.

Change of purpose

Gegenstand des Unternehmens ist die Tätigkeit im Bereich Projektingenieur-, Projektmanagement- und Planungsbüro, Sachverständigen- und Fachplanungsbüro, Ingenieurdienstleister im Bereich Bauwesen (insbesondere mit Fokus auf Brandschutz, Elektro, Lüftung und Leitungsführung), Übernahme, Steuerung und Abwicklung von Projekten im baulichen Brandschutz, insbesondere im Bereich Rechenzentren, Projektmanagement und Koordination komplexer Bau- und Brandschutzprojekte, Entwicklung digitaler Prozesse, Projektmanagement- und Organisationssystem, Aufbau, Koordination und Steuerung von Subunternehmernetzwerken, Vergabe und Management von Projektleistungen an Subunternehmer, Entwicklung, Aufbau, Halten und Lizenzierung von Marken, Rechten und Beteiligungen an anderen Unternehmen, Projektentwicklung, Zusammenarbeit mit Investoren, Finanzierungs- und Beteiligungsstrukturen sowie Business Angels.
08.06.

Change of share capital

CONSTRUQT GmbH
08.06.

Member entry

Metin Sahin · Managing Director
08.06.

Change of bylaws

CONSTRUQT GmbH
25.03.

Correction of personal data

Semih Pektas · Managing Director
16.03.

Exit of position

Semih Pektas · Managing Director

25 more events including all details Get API key →

Annual statements

Original published statements, ordered by fiscal year.

3 documents

Fiscal year	Document	Published	Access
2024	Jahresabschluss	Published September 10, 2026	Via the API
2023	Jahresabschluss	Published March 26, 2025	Read full text
2022	Jahresabschluss	Published June 17, 2024	Via the API

All financial statements via the API

2023 Jahresabschluss Full text

CONSTRUQT GmbH (vormals: Redgon GmbH)

Mainz

Jahresabschluss zum Geschäftsjahr vom 01.01.2023 bis zum 31.12.2023

Bilanz

Aktiva
	31.12.2023 EUR	31.12.2022 EUR
A. Anlagevermögen	16.722,08	83.957,08
I. Immaterielle Vermögensgegenstände	3.766,00	6.166,00
II. Sachanlagen	5.434,00	70.269,00
III. Finanzanlagen	7.522,08	7.522,08
B. Umlaufvermögen	547.885,70	513.725,02
I. Forderungen und sonstige Vermögensgegenstände	547.885,70	494.404,07
II. Kassenbestand, Bundesbankguthaben, Guthaben bei Kreditinstituten und Schecks		19.320,95
C. Rechnungsabgrenzungsposten	127,92	1.062,87
Aktiva	564.735,70	598.744,97

Passiva
	31.12.2023 EUR	31.12.2022 EUR
A. Eigenkapital	546.106,26	476.506,89
I. eingefordertes Kapital	12.500,00	12.500,00
1. Gezeichnetes Kapital	25.000,00	25.000,00
2. nicht eingeforderte ausstehende Einlagen	-12.500,00	-12.500,00
II. Gewinnvortrag	464.006,89
III. Jahresüberschuss	69.599,37
IV. Bilanzgewinn / Bilanzverlust		464.006,89
davon Gewinn-/Verlustvortrag		360.689,75
B. Rückstellungen	13.296,16	10.849,42
C. Verbindlichkeiten	5.333,28	111.388,66
davon mit einer Restlaufzeit bis zu einem Jahr	5.333,28	111.388,66
Summe Passiva	564.735,70	598.744,97

sonstige Berichtsbestandteile

Mainz, den 18.2.2025

gez. Metin Sahin

Angaben zur Feststellung:
Der Jahresabschluss wurde am 18.02.2025 festgestellt.

Register documents

Bring original register extracts and company documents into your application as PDF or XML.

GET/v1/fetch-document

View the document API

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

Explore more companies

Handelsregister API · MCP

Company data in your AI chat

Ask about directors, ownership and financial figures. Our MCP server connects your assistant to the Handelsregister API.

MCP documentation

Connect your assistant

Open Connectors in Claude and add a custom connector.
Enter this server URL and add the connector:
https://mcp.handelsregister.ai/mcp
Connect with your handelsregister.ai account, then enable the connector in your chat via “+” → “Connectors”.

In ChatGPT on the web, open Settings → Apps and create a custom app. Developer mode must be enabled for your account.
Use “handelsregister” as the name, OAuth for authentication and this server URL:
https://mcp.handelsregister.ai/mcp
Sign in with your handelsregister.ai account, create the app and select it from the tools menu in your chat.

Run once in your terminal:

Terminal

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

Replace YOUR_API_KEY with your handelsregister.ai API key.

Add this MCP server as a tool in your application:

Python

from openai import OpenAI

client = OpenAI()
response = client.responses.create(
    model="gpt-6-astra",
    input="Show me the directors, shareholders and latest available financial figures for CONSTRUQT GmbH. Include fiscal years and sources.\n\nentity_id: 6d75d9017b0608b7b203a988417ad2da",
    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)

Replace YOUR_API_KEY with your handelsregister.ai API key.

Add this configuration to your MCP client:

JSON

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

Replace YOUR_API_KEY with your handelsregister.ai API key.

Ask about this company

Once connected, ask your assistant this question:

Show me the directors, shareholders and latest available financial figures for CONSTRUQT GmbH. Include fiscal years and sources.

entity_id6d75d9017b0608b7b203a988417ad2da

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