Risk grade updatedRisk gradeEvidence verified
21 Sept 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade A3.Business profile
TST Asennus Oy
TST Asennus Oy's registered office is Turku. It is a limited company. The company was established on 1996-10-15. It operates in the industry of electrical installation. In its latest retained statement for 2025-12-31, revenue was €182,962 and operating profit was €22,069.
Business ID 1062984-9ValidUnclaimed company profile
Trusted core data
Public company details from the trade register.
- Business ID
- 1062984-9
- Sector
- Electrical installation
- Municipality
- Turku
- Company form
- Limited company
- Registration date
- 1996-10-15
- Business ID registration date
- 1996-10-01
- Business status
- Valid
- Profile ownership
- Unclaimed company profile
Contact and location summary
Visiting address: Kielokuja 10, 20740, Turku
Phone: +358400528030Source observation
Email: [email protected]Source observation
Website: https://www.tst-asennus.fiSource observation
People and decision-makers
Kipinoinen Jyrki JuhaniToimitusjohtaja
About TST Asennus Oy
Financial position and key figures for the company.
TST Asennus Oy's location municipality is Turku. It is a limited company. The company was established on 1996-10-15. It operates in the industry of electrical installation. In its latest retained statement for 2025-12-31, revenue was €182,962 and operating profit was €22,069. The latest retained financial statement for 2025-12-31 shows revenue of €182,962 and profit for the financial year of €18,539. Based on the latest retained statement, revenue growth was -63.3%, operating margin was +11.8%, and equity ratio was +55.1%.
Auxiliary business names
Public alternate names materialized from source observations.
Turun Sähkö- ja Teleasennus
Extended business activity
A longer directory- or registry-backed activity description that complements the short registry industry label.
Yhtiön toimialana on sähkö- ja teleasennustyöt urakalla tai laskuun sekä alan tarvikkeiden kauppa ja maahantuonti. Yhtiö tekee sähkösuunnitelmia. Yhtiö voi toimintaansa varten omistaa kiinteistöjä tai osakkeita.
Financial highlights
Key figures from the latest financial period.
Latest financial period
2025-12-31
0
0
Enriched source observation
Derived indicators
Revenue growth-63.3%
Operating margin11.8%
Equity ratio55.1%
Revenue€182,962-€315,839 (-63.3%) vs previous periodPrevious: €498,801
Operating profit (loss)€22,069+€148,250 (+117.5%) vs previous periodPrevious: -€126,180
Profit (loss) for the financial year€18,539+€164,967 (+112.7%) vs previous periodPrevious: -€146,428
Assets€387,313-€20,406 (-5.0%) vs previous periodPrevious: €407,719
Balance-sheet contextLatest financial period
Profit before taxes€18,539Previous: -€146,428
Employees1Previous: 1
Revenue trend5 periods
€1,047,879
2021-12-31
€763,441
2022-12-31
€688,160
2023-12-31
€498,801
2024-12-31
€182,962
2025-12-31
Operating profit (loss) trend5 periods
€86,241
2021-12-31
-€81,801
2022-12-31
€14,099
2023-12-31
-€126,180
2024-12-31
€22,069
2025-12-31
Profit (loss) for the financial year trend5 periods
€65,476
2021-12-31
-€87,072
2022-12-31
€9,966
2023-12-31
-€146,428
2024-12-31
€18,539
2025-12-31
Assets trend5 periods
€639,007
2021-12-31
€465,780
2022-12-31
€589,322
2023-12-31
€407,719
2024-12-31
€387,313
2025-12-31
Financial ratios
Financial ratios based on financial statement data. Source: Rikastettu lähdehavainto.
Equity ratioGood
69/100 · Improving
Current ratioNot assessable
0/100 · Trend unavailable
Operating profit marginGood
80/100 · Improving
Ratio history
| Ratio | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|---|
| Equity ratio | 71.1 % | 71.1 % | 57.9 % | 47.8 % | 55.1 % |
| Current ratio | - | - | - | - | - |
| Operating profit margin | 8.1 % | -10.7 % | 2.0 % | -25.1 % | 11.8 % |
Registry status and identifiers
Current registry information and identifiers based on YTJ data.
YTJ statusValid
Trade RegisterRegistered
Business ID1062984-9
VAT IDFI10629849
EU IDFIFPRO.1062984-9
MunicipalityTurku
Current registered entries
1996-09-19Registered in Tax Administration (Employer Register)
1996-09-19VAT-liable for business activity in Tax Administration (VAT Register)
1996-09-26Registered in Tax Administration (Prepayment Register)
1996-10-01Registered in Tax Administration (Tax Administration)
1996-10-15Registered in Patent and Registration Office (Trade Register)
Responsible people
Public role relationships materialized from source observations.
Kipinoinen Jyrki JuhaniToimitusjohtajaSources: 5 · Confidence: 78%
Kipinoinen Jyrki JuhaniVarsinainen jäsenSources: 2 · Confidence: 78%
Haavisto Pekka Veli-MarttiTilintarkastajaSources: 2 · Confidence: 78%
Kipinoinen Elina MariaVarajäsenSources: 2 · Confidence: 78%
Outi Marketta Ala-Juusela-HaavistoVaratilintarkastajaSources: 1 · Confidence: 76%
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
GoodTST Asennus Oy
Grade unchangedA3 · new analysis 2026-10-18
70/100
Medium
Usable financial evidenceFinancial data included
Financial development has been volatile across multiple domains.
4 comparable periodsProfitabilityVolatile
SolvencyVolatile
LiquidityNot enough history
Same industry, size and age groupDescriptive comparison – does not change the model score.
279 peersSolvency53%
Close to the peer-group midpoint
Profitability73%
Better than 73% of peers
Revenue growth1%
Below 99% of peers
Supporting factors
- Strong equity ratio
- Strong operating profitability
- Active registered status
Risk factors to note
- Sharp year-over-year revenue drop
- Material volatility across multiple financial domains
- Elevated industry distress context
Automatic assessment developmentChanges are derived from evidence differences between persisted automatic assessments.
2 assessmentsA3
2026-10-1870/100 · v0.15
A3 → A3 · -1 points- Evidence quality: Strong financial evidence → Usable financial evidence.
A3
2026-09-2171/100 · v0.14
Oldest retained automatic assessment in this comparisonA3
2026-10-18
open-risk-grade-v0.15
The grade can use open digital financial statement data together with registry signals.
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
38/100
Industry context is elevated based on normalized open statistical inputs.
Age and continuityVakiintunut
90/100
The company has about 30 years of registry continuity.
Registry and status signalsErittäin vahva
93/100
Long registry history, recent financial statement filings, and active register markings support this signal.
Events & news
Verified events and sourced external company news in one timeline.
Registry timeline
Trade register notifications shown on a timeline.
20 register eventsLatest event: 2026-06-05
Profile source and ownership
Profile based on public registry data
BUSINESS.fi has created this profile from public company information. Source data updated 2025-12-31.
This company profile has not been claimed yet
TST Asennus Oy shows public core facts. A company representative can claim the profile, update public information, and access owner tools.