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Byggefirmaet Mastrup ApS

Private limited companyCVR 25053079HerlufmagleActive

Byggefirmaet Mastrup ApS is a private limited company, based in Herlufmagle, active in joinery installation, founded in 1999. Equity was negative at the end of 2025 (−DKK 360k). The company went from a profit in 2024 to a loss of DKK 442k in 2025.

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Key figures · financial year 2025

Gross profitDKK 859k−45.9% vs. 2024
Net profit−DKK 442k−862.4% vs. 2024
Equity−DKK 360k−534% vs. 2024
Employees4latest month from CVR

What has changed

calculated from recorded figures and dates

Financials: 2025 against 2024

  • Gross profit fell 46% (2024 → 2025), to DKK 859k.
  • Net profit went from a profit of DKK 58,022 to a loss of DKK 442k (2024 → 2025).
  • Equity turned negative: −DKK 360k (2024 → 2025).

Employees

  • 1 fewer employees than a year earlier: 4 (08/2026) against 5 (08/2025).

Registrations, last 24 months

  • 01/01/2025: Industry changed to Joinery installation (433200)

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 800k−DKK 600k−DKK 400k−DKK 200kDKK 0DKK 200kDKK 400k202020212022202320242025
EquityNet profit
Financial figures for Byggefirmaet Mastrup ApS
202020212022202320242025Change
Revenuenot statednot statednot statednot statednot statednot stated–
Gross profit2,4391,3162,0971,8881,587859−45.9%
Operating profit (EBIT)−97−69610014359−442−851.9%
Profit before tax−165−6987710358−442−862.4%
Net profit−122−6477710358−442−862.4%
Total assets3,4042,4173,2072,5231,232884−28.3%
Equity492−155−782583−360−534%
Liabilities2,8602,5713,2852,4981,1501,243+8.1%
Cash and cash equivalents–232540119226138−38.7%
Average number of employees667543−25%

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 2mDKK 2.5m202020212022202320242025
Gross profitMedian, the industry (3,429 companies)

Signals from the financial statements

calculated from the 2025 figures

  • Negative equity

    Equity was −DKK 360k at the end of 2025.

    How is this calculated?

    Equity in the latest annual report is below zero.

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 Byggefirmaet Mastrup ApS
Financial yearPeriodPublishedFigures forDocuments
202501/10/2024 – 30/09/202501/04/2026The companyPDF not statedXBRL
202401/10/2023 – 30/09/202409/03/2025The companyPDFXBRL
202301/10/2022 – 30/09/202303/04/2024The companyPDFXBRL
202201/10/2021 – 30/09/202212/04/2023The companyPDFXBRL
202101/10/2020 – 30/09/202124/03/2022The companyPDFXBRL
202001/10/2019 – 30/09/202005/03/2021The 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
012345609/2310/2311/2312/2301/2402/2403/2404/2405/2406/2407/2408/2409/2410/2411/2412/2401/2502/2503/2504/2505/2506/2507/2508/2509/2510/2511/2512/2501/2602/2603/2604/2605/2606/2607/2608/26
Employees

Position in the industry

3,429 companies in the database

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

Gross profitDKK 859kNo. 2677 of 3,428
Better than 22% of the companies in the industry
Equity−DKK 360kNo. 3311 of 3,429
Better than 3% of the companies in the industry
Number of employees4No. 1757 of 3,429
Better than 49% of the companies in the industry

Industry median: gross profit DKK 2m, net profit DKK 133k, equity DKK 623k, 4 employees.

DKK 100kDKK 780kDKK 6.1mDKK 47.5mDKK 186.9mHere
Distribution of gross profit for 3,347 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. 47,369of 69,742
Better than 32%
No. 65,009of 69,964
Better than 7%
Same industry and fewer than 20 employees3,046 companies in the comparison
No. 2,301of 3,045
Better than 24%
No. 2,936of 3,046
Better than 4%
Companies that are between 15 and 29 years old24,910 companies in the comparison
No. 19,492of 24,791
Better than 21%
No. 23,857of 24,909
Better than 4%
All companies of type ApS66,508 companies in the comparison
No. 45,594of 66,379
Better than 31%
No. 61,445of 66,505
Better than 8%

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

Joinery installation
Gross profit
  1. Byggefirmaet Mastrup ApSDKK 859k
  2. Egil Rasmussen A/SDKK 370.7m
  3. Jakon A/SDKK 197.1m
Net profit
  1. Byggefirmaet Mastrup ApS−DKK 442k
  2. Egil Rasmussen A/SDKK 65.4m
  3. Jakon A/SDKK 66.1m
Equity
  1. Byggefirmaet Mastrup ApS−DKK 360k
  2. Egil Rasmussen A/SDKK 212.5m
  3. Jakon A/SDKK 205.4m
Employees
  1. Byggefirmaet Mastrup ApS4
  2. Egil Rasmussen A/S523
  3. Jakon A/S446

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
  • Frank Mastrup Holding ApS100%
Byggefirmaet Mastrup ApS

Management

1 active registrations

Executive management

Executive management at Byggefirmaet Mastrup ApS
NameRoleAppointed
Frank Birger MastrupDirector29/08/2000
Founders
ApS KBUS 38 nr.3117
Former management (4)
Former management at Byggefirmaet Mastrup ApS
NameRoleAppointedResigned
Kim MadsenDirector15/11/199930/03/2000
Peter Andreas StakemannBoard member15/11/199930/03/2000
Teddy Brian MastrupBoard member29/08/200029/08/2000
Teddy Brian MastrupDirector29/08/200001/10/2016

Signing rule: Selskabet tegnes af en direktør alene

Address and production units

1 active production units

Helgesvej 19
4160 Herlufmagle

Næstved Municipality · Postcode 4160

Production units
Production unitAddressEmployeesP number
BYGGEFIRMAET MASTRUP ApSHelgesvej 19, 4160 Herlufmagle41007257062

Purpose

Selskabets formål er at drive håndværksvirksomhed, opføre og sælge fast ejendom samt dermed beslægtet virksomhed

The purpose is quoted from the register in Danish.

Changes year by year

29 registered events
20261 changeaccounts 1
  • Annual report for 2025 published
20252 changesaccounts 1 · industry 1
  • Annual report for 2024 published
  • Industry changed to Joinery installation (433200)
20241 changeaccounts 1
  • Annual report for 2023 published
20231 changeaccounts 1
  • Annual report for 2022 published
20221 changeaccounts 1
  • Annual report for 2021 published
20212 changesaccounts 1 · address 1
  • Annual report for 2020 published
  • Moved to Helgesvej 19, 4160 Herlufmagle
20172 changescapital 1 · ownership 1
  • Share capital changed from 125,000 DKK to 62,500 DKK
  • Frank Birger Mastrup is no longer registered as owner
20162 changesmanagement 1 · ownership 1
  • Teddy Brian Mastrup stepped down as director
  • Teddy Brian Mastrup is no longer registered as owner
20152 changesownership 2
  • Frank Birger Mastrup registered as owner (100%)
  • Teddy Brian Mastrup registered as owner (50%)
20081 changeindustry 1
  • Industry changed to Joinery installation (433200)
20071 changeaddress 1
  • Moved to Helgesvej 19, 4160 Herlufmagle
20009 changesmanagement 6 · name 1 · industry 1 · address 1
  • Teddy Brian Mastrup appointed board member
  • Teddy Brian Mastrup stepped down as board member
  • Teddy Brian Mastrup appointed director
  • Frank Birger Mastrup appointed director
  • Name changed from ApS KBIL 17 NR. 1173 to BYGGEFIRMAET MASTRUP ApS
  • Industry changed to Tømrer- og bygningssnedkerforretninger (454200)
  • Moved to Helgesvej 19, 4160 Herlufmagle
  • Kim Madsen stepped down as director
  • Peter Andreas Stakemann stepped down as board member
19994 changesfounded 1 · management 2 · ownership 1
  • Registered as ApS KBIL 17 NR. 1173
  • Kim Madsen appointed director
  • Peter Andreas Stakemann appointed board member
  • FRANK MASTRUP HOLDING ApS registered as owner (100%)

Related companies

Same people in management

Largest in the industry

See all →

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.

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