Business profile

Topmast Oy

Topmast Oy's registered office is Lahti. It is a limited company. The company was established on 2023-09-28. It operates in the industry of construction of utility projects for electricity and telecommunications. In its latest retained statement for 2025-03-31, revenue was €357,101 and operating profit was €91,607.

Claim profileContact details
Business ID 3392629-9ValidUnclaimed company profile

Trusted core data

Public company details from the trade register.

Business ID
3392629-9
Sector
Construction of utility projects for electricity and telecommunications
Municipality
Lahti
Company form
Limited company
Registration date
2023-09-28
Business ID registration date
2023-09-26
Business status
Valid
Profile ownership
Unclaimed company profile

Contact and location summary

Visiting address: Mustatiaisenkatu 15, 15680, Lahti

About Topmast Oy

Financial position and key figures for the company.

Topmast Oy's location municipality is Lahti. It is a limited company. The company was established on 2023-09-28. It operates in the industry of construction of utility projects for electricity and telecommunications. In its latest retained statement for 2025-03-31, revenue was €357,101 and operating profit was €91,607. The latest retained financial statement for 2025-03-31 shows revenue of €357,101 and profit for the financial year of €72,435. Based on the latest retained statement, revenue growth was +890.6%, operating margin was +25.7%, and equity ratio was +73.3%.

Financial highlights

Key figures from the latest financial period.

Open full statement
Latest financial period

2025-03-31

Imported periods2
PRH parsed2
Profile sourcePRH/XBRL financial statement
Derived indicators
Revenue growth890.6%
Operating margin25.7%
Equity ratio73.3%
Revenue€357,101+€321,053 (+890.6%) vs previous periodPrevious: €36,049
Operating profit (loss)€91,607+€90,823 (+11579.6%) vs previous periodPrevious: €784
Profit (loss) for the financial year€72,435+€71,841 (+12091.6%) vs previous periodPrevious: €594
Assets€99,567+€87,056 (+695.9%) vs previous periodPrevious: €12,511
Balance-sheet contextLatest financial period
Cash and bank€53,111Previous: €792
Retained earnings€594Previous: €0
Equity€73,030Previous: €594
Liabilities€26,537Previous: €11,917
Current assets€99,567Previous: €12,511
Current liabilities€26,537Previous: €11,917
Revenue trend2 periods
€36,049
2024-03-31
€357,101
2025-03-31
Operating profit (loss) trend2 periods
€784
2024-03-31
€91,607
2025-03-31
Profit (loss) for the financial year trend2 periods
€594
2024-03-31
€72,435
2025-03-31
Assets trend2 periods
€12,511
2024-03-31
€99,567
2025-03-31

Financial ratios

Financial ratios based on financial statement data. Source: PRH/XBRL-tilinpäätös.

Equity ratioGood
92/100 · Improving
73.3 %2024-03-31: 4.8 %
Current ratioGood
67/100 · Improving
2.00x2024-03-31: 0.07x
Operating profit marginGood
100/100 · Improving
25.6 %2024-03-31: 2.2 %
Ratio history
Ratio2024-03-312025-03-31
Equity ratio4.8 %73.3 %
Current ratio0.07x2.00x
Operating profit margin2.2 %25.6 %

Registry status and identifiers

Current registry information and identifiers based on YTJ data.

YTJ statusValid
Trade RegisterRegistered
Business ID3392629-9
VAT IDFI33926299
EU IDFIFPRO.3392629-9
MunicipalityLahti
Current registered entries
2023-09-26Registered in Tax Administration (Employer Register)
2023-09-26VAT-liable for business activity in Tax Administration (VAT Register)
2023-09-26Registered in Tax Administration (Prepayment Register)
2023-09-28Registered in Tax Administration (Tax Administration)
2023-09-28Registered in Patent and Registration Office (Trade Register)

Risk certificate

An open-data based company stability and risk signal.

BUSINESS.fi

BUSINESS.fi Luottoluokitus

Profile-specific risk signal based on open data

Automatic gradeNot a credit decision
A3
GoodTopmast Oy
Grade upgradedB3 → A3 · new analysis 2026-09-20
Model score78/100
Assessment confidenceHigh
Evidence qualityStrong financial evidenceFinancial data included
Financial trajectorySeveral key financial indicators show coordinated recovery.
2 comparable periods
RevenueImproving
ProfitabilityImproving
SolvencyImproving
LiquidityImproving
Peer comparisonNational Tier 1 comparisonDescriptive comparison – does not change the model score.
180 peers
Solvency64%
Better than 64% of peers
Profitability84%
Better than 84% of peers
Liquidity68%
Better than 68% of peers
Revenue growth98%
Better than 98% of peers
Financial statement reporting patternRegularBased on observed PRH financial period end and registration dates. This descriptive evidence does not change the v0.14 score.
2 observed filings
Latest registration lag235 days after period end
Typical registration lag193 days after period end
Annual continuity2 consecutive periods
Supporting factors
  • Strong equity ratio
  • Strong operating profitability
  • Healthy short-term liquidity
Risk factors to note
  • Elevated industry distress context
Rating historyAutomatic assessment developmentChanges are derived from evidence differences between persisted automatic assessments.
5 assessments
A3
2026-09-20 06:0478/100 · v0.14
B3 → A3 · +35 points
  • Evidence strengthened: a PRH/XBRL financial statement was added to the assessment (2025-03-31).
  • Assessment confidence: Medium → High.
  • Evidence quality: Registry and statistical evidence → Strong financial evidence.
B3
2026-09-1443/100 · v0.14
B3 → B3
B3
2026-09-1443/100 · v0.13
B2 → B3 · -8 points
  • Assessment confidence: Low → Medium.
  • Evidence quality: Registry and statistical evidence → Registry and statistical evidence.
  • New risk factor: Sufficient structured financial metrics are not available.
B2
2026-09-1351/100 · v0.12
Oldest retained automatic assessment in this comparison
Automatic model gradeA3
Automatic model snapshot2026-09-20
Automatic model versionopen-risk-grade-v0.14
Financial data included

The grade can use open digital financial statement data together with registry signals.

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Risk context

When sufficient source-backed financial metrics are not available for a Tier 1 assessment, BUSINESS.fi shows registry, industry, and regional context.

Industry riskelevated
48/100

Industry context is elevated based on normalized open statistical inputs.

Age and continuityNuori
35/100

The company has about 3 years of registry continuity.

Registry and status signalsRajallinen
44/100

Registry history, filing recency, and active register markings are still limited or mixed.

Events & news

Verified events and sourced external company news in one timeline.

Risk grade updatedRisk gradeEvidence verified
20 Sept 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade B3 → A3.
Risk grade updatedRisk gradeEvidence verified
14 Sept 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade B3.

Registry timeline

Trade register notifications shown on a timeline.

4 register eventsLatest event: 2025-11-21

Financial statements availability

Available financial statement periods and PRH source filings.

2 financial statement periodsLatest financial period: 2025-03-31

Profile source and ownership

Profile based on public registry data
BUSINESS.fi has created this profile from public company information. Source data updated 2026-02-03.

This company profile has not been claimed yet

Topmast Oy shows public core facts. A company representative can claim the profile, update public information, and access owner tools.