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Hartzbyg ApS

Private limited companyCVR 31414938VirumActive

Hartzbyg ApS is a private limited company, based in Virum, active in bricklaying, founded in 2008. Net profit fell 94% from 2024 to 2025, ending at DKK 3,650. Equity fell to DKK 155k in 2025.

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Key figures · financial year 2025

Gross profitDKK 870k+2.9% vs. 2024
Net profitDKK 3,650−93.7% vs. 2024
EquityDKK 155k−45.8% vs. 2024
Employees2latest month from CVR

What has changed

calculated from recorded figures and dates

Financials: 2025 against 2024

  • Gross profit rose 3% (2024 → 2025), to DKK 870k.
  • Net profit fell 94% (2024 → 2025), to DKK 3,650.
  • Equity fell 46% (2024 → 2025), to DKK 155k.

Registrations, last 24 months

  • 01/01/2025: Industry changed to Bricklaying (439100)

Calculated from the latest two annual reports in sequence and from registrations in CVR. A figure that is missing in either year gives no line, and we derive no figures.

Financial statements

Financial years 2020–2025 · amounts in DKK thousand

Equity and net profit

−DKK 200kDKK 0DKK 200kDKK 400kDKK 600kDKK 800kDKK 1m202020212022202320242025
EquityNet profit
Financial figures for Hartzbyg ApS
202020212022202320242025Change
Revenuenot statednot statednot statednot statednot statednot stated–
Gross profit1,7961,1866661,116845870+2.9%
Operating profit (EBIT)554−14240244795−93.3%
Profit before tax702−16617236776−92.7%
Net profit583−1329181584−93.7%
Total assets2,0771,135474605410300−26.7%
Equity946376270351287155−45.8%
Liabilities1,123760204254123145+17.7%
Cash and cash equivalents657429278504305195−36.1%
Average number of employees4412220%

Source: annual reports filed with the Danish Business Authority (XBRL). Figures for the company (not the group); change is the latest year against the year before. “–” means the figure is not stated in the annual report. Revenue is not stated for 2020, 2021, 2022, 2023, 2024, 2025: smaller companies may omit it, and we do not derive it from other figures.

Download the figures as CSV · free with an account, amounts in whole DKK

DKK 0DKK 500kDKK 1mDKK 1.5mDKK 2m202020212022202320242025
Gross profitMedian, the industry (1,156 companies)

Signals from the financial statements

calculated from the 2025 figures

  • Equity fell sharply

    Equity fell 46% from 2024 to 2025 (DKK 287k to DKK 155k).

    How is this calculated?

    Equity has fallen by at least 30% from the previous annual report, and it was positive the year before.

The signals are rules applied to the figures in the annual reports. They are not an assessment or credit rating of the company. See Data and method.

Annual reports

6 financial years
Annual reports for Hartzbyg ApS
Financial yearPeriodPublishedFigures forDocuments
202501/01/2025 – 31/12/202517/01/2026The companyPDF not statedXBRL
202401/01/2024 – 31/12/202406/02/2025The companyPDFXBRL
202301/01/2023 – 31/12/202331/01/2024The companyPDFXBRL
202201/01/2022 – 31/12/202212/01/2023The companyPDFXBRL
202101/01/2021 – 31/12/202113/06/2022The companyPDFXBRL
202001/01/2020 – 31/12/202021/04/2021The companyPDFXBRL

The figures from all the annual reports are shown on this page. The documents themselves (PDF and XBRL, the machine-readable edition) are downloaded with a Pro account: sign in or create a free account, and then choose Pro. XBRL is the edition the figures on the page are read from.

Employees

monthly figures from CVR
011223309/2310/2311/2312/2301/2402/2403/2404/2405/2406/2407/2408/2409/2410/2411/2412/2401/2502/2503/2504/2505/2506/2507/2508/2509/2510/2511/2512/2501/2602/2603/2604/2605/2606/2607/2608/26
Employees

Position in the industry

1,156 companies in the database

Comparison with the other companies in bricklaying based on the latest financial year.

Gross profitDKK 870kNo. 931 of 1,154
Better than 19% of the companies in the industry
EquityDKK 155kNo. 869 of 1,156
Better than 25% of the companies in the industry
Number of employees2No. 715 of 1,156
Better than 38% of the companies in the industry

Industry median: gross profit DKK 2m, net profit DKK 133k, equity DKK 600k, 4 employees.

DKK 100kDKK 618kDKK 3.8mDKK 23.6mDKK 79.6mHere
Distribution of gross profit for 1,130 companies in the industry (latest financial year, logarithmic scale). Amber bar: where this company sits.

Compared with similar companies

size, age and company form
Rank among similar companies
GroupGross profitEquity
Companies with fewer than 20 employees69,967 companies in the comparison
No. 47,183of 69,742
Better than 32%
No. 52,328of 69,964
Better than 25%
Same industry and fewer than 20 employees1,048 companies in the comparison
No. 824of 1,046
Better than 21%
No. 764of 1,048
Better than 27%
Companies that are between 15 and 29 years old24,910 companies in the comparison
No. 19,450of 24,791
Better than 22%
No. 22,505of 24,909
Better than 10%
All companies of type ApS66,508 companies in the comparison
No. 45,417of 66,379
Better than 32%
No. 48,436of 66,505
Better than 27%

The rank is calculated among companies in the database with a figure for the latest financial year, and is shown only for groups of at least ten companies.

Compare with the industry

Bricklaying
Gross profit
  1. Hartzbyg ApSDKK 870k
  2. HMC Byg & Anlæg A/SDKK 146.1m
  3. Renovo ApSDKK 101.3m
Net profit
  1. Hartzbyg ApSDKK 3,650
  2. HMC Byg & Anlæg A/SDKK 6.9m
  3. Renovo ApSDKK 5.9m
Equity
  1. Hartzbyg ApSDKK 155k
  2. HMC Byg & Anlæg A/SDKK 39.5m
  3. Renovo ApSDKK 24.6m
Employees
  1. Hartzbyg ApS2
  2. HMC Byg & Anlæg A/S250
  3. Renovo ApS159

Latest financial year per company. Choose up to three companies from the largest in the industry.

Owners and group

from the Public Ownership Register
Owners
  • Martin Walenthin Hartz100%
Hartzbyg ApS

Management

1 active registrations

Executive management

Executive management at Hartzbyg ApS
NameRoleAppointed
Martin Walenthin HartzDirector28/04/2008
Founders
Martin Walenthin Hartz

Signing rule: Selskabet tegnes af den samlede direktion.

Address and production units

1 active production units

Peder Godskes Vej 16
2830 Virum

Lyngby-Taarbæk Municipality · Postcode 2830

Production units
Production unitAddressEmployeesP number
HARTZBYG ApSPeder Godskes Vej 16, 2830 Virum21014392927

Purpose

Selskabets formål er at drive murer-, entreprenør-, samt salgsvirksomhed, samt al virksomhed, som efter direktionens skøn er beslægtet hermed.

The purpose is quoted from the register in Danish.

Changes year by year

12 registered events
20261 changeaccounts 1
  • Annual report for 2025 published
20252 changesaccounts 1 · industry 1
  • Annual report for 2024 published
  • Industry changed to Bricklaying (439100)
20241 changeaccounts 1
  • Annual report for 2023 published
20231 changeaccounts 1
  • Annual report for 2022 published
20221 changeaccounts 1
  • Annual report for 2021 published
20211 changeaccounts 1
  • Annual report for 2020 published
20191 changeaddress 1
  • Moved to Peder Godskes Vej 16, 2830 Virum
20084 changesindustry 1 · ownership 1 · founded 1 · management 1
  • Industry changed to Murere (439910)
  • Martin Walenthin Hartz registered as owner (100%)
  • Registered as HARTZBYG ApS
  • Martin Walenthin Hartz appointed director

Related companies

Source and updates

The information comes from the Danish Central Business Register (Danish Business Authority) and from annual reports filed with the Danish Business Authority. Last synchronised 24/10/2026. The company is protected against advertising; contact details are not shown, and the data must not be used for marketing.

View in CVRReport a correction