Risk grade updatedRisk gradeEvidence verified
17 Oct 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade A2.Business profile
Arkkitehdit Osara Oy
Arkkitehdit Osara Oy's registered office is Helsingfors. It is a limited company. The company was established on 1983-05-19. It operates in the industry of architectural activities. In its latest retained statement for 2025-12-31, revenue was €625,771 and operating profit was €24,029.
Business ID 0534451-5ValidUnclaimed company profile
Trusted core data
Public company details from the trade register.
- Business ID
- 0534451-5
- Sector
- Architectural activities
- Municipality
- Helsingfors
- Company form
- Limited company
- Registration date
- 1983-05-19
- Business ID registration date
- 1983-12-19
- Business status
- Valid
- Profile ownership
- Unclaimed company profile
Contact and location summary
Visiting address: Huvilakatu 4 A 1, 00150, Helsingfors
Phone: +35896877420Source observation
Website: https://www.osara-ark.fiSource observation
People and decision-makers
Havumäki Tiina KatriinaToimitusjohtaja
Email: Email available for logged-in usersSource: company website
Phone: Phone available for logged-in usersSource: company website
Elina SaarisaloDecision-maker
Email: Email available for logged-in usersSource: company website
Phone: Phone available for logged-in usersSource: company website
Erkki PirttiläRakennusinsinööri
Email: Email available for logged-in usersSource: company website
Phone: Phone available for logged-in usersSource: company website
Direct contact details available for logged-in usersSome person-level contact details are shown only to registered users. The data is based on public sources, such as the company's own website.Log in to view decision-maker contact details
About Arkkitehdit Osara Oy
Financial position and key figures for the company.
Arkkitehdit Osara Oy's location municipality is Helsingfors. It is a limited company. The company was established on 1983-05-19. It operates in the industry of architectural activities. In its latest retained statement for 2025-12-31, revenue was €625,771 and operating profit was €24,029. The latest retained financial statement for 2025-12-31 shows revenue of €625,771 and profit for the financial year of €19,280. Based on the latest retained statement, revenue growth was +19.2%, operating margin was +3.8%, and equity ratio was +75.6%.
Auxiliary business names
Public alternate names materialized from source observations.
Perusparannussuunnittelu Osara
Financial highlights
Key figures from the latest financial period.
Latest financial period
2025-12-31
0
0
Enriched source observation
Derived indicators
Revenue growth19.2%
Operating margin3.8%
Equity ratio75.6%
Revenue€625,771+€100,757 (+19.2%) vs previous periodPrevious: €525,014
Operating profit (loss)€24,029+€69,560 (+152.8%) vs previous periodPrevious: -€45,531
Profit (loss) for the financial year€19,280+€64,474 (+142.7%) vs previous periodPrevious: -€45,194
Assets€113,778+€40,307 (+54.9%) vs previous periodPrevious: €73,471
Balance-sheet contextLatest financial period
Employees3Previous: No comparison value
Revenue trend5 periods
€290,052
2021-12-31
€344,108
2022-12-31
€312,074
2023-12-31
€525,014
2024-12-31
€625,771
2025-12-31
Operating profit (loss) trend5 periods
€19,272
2021-12-31
€29,383
2022-12-31
€24,307
2023-12-31
-€45,531
2024-12-31
€24,029
2025-12-31
Profit (loss) for the financial year trend5 periods
€16,451
2021-12-31
€20,453
2022-12-31
€19,500
2023-12-31
-€45,194
2024-12-31
€19,280
2025-12-31
Assets trend5 periods
€121,858
2021-12-31
€138,350
2022-12-31
€140,539
2023-12-31
€73,471
2024-12-31
€113,778
2025-12-31
Financial ratios
Financial ratios based on financial statement data. Source: Rikastettu lähdehavainto.
Equity ratioGood
95/100 · Declining
Current ratioNot assessable
0/100 · Trend unavailable
Operating profit marginSatisfactory
60/100 · Improving
Ratio history
| Ratio | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|---|
| Equity ratio | 63.2 % | 66.8 % | 79.7 % | 90.9 % | 75.6 % |
| Current ratio | - | - | - | - | - |
| Operating profit margin | 6.6 % | 8.5 % | 7.8 % | -8.7 % | 3.8 % |
Registry status and identifiers
Current registry information and identifiers based on YTJ data.
YTJ statusValid
Trade RegisterRegistered
Business ID0534451-5
VAT IDFI05344515
EU IDFIFPRO.0534451-5
MunicipalityHelsingfors
Current registered entries
1983-05-19Registered in Patent and Registration Office (Trade Register)
1983-12-19Registered in Tax Administration (Tax Administration)
1990-05-01Registered in Tax Administration (Employer Register)
1994-06-01VAT-liable for business activity in Tax Administration (VAT Register)
1995-03-01Registered in Tax Administration (Prepayment Register)
Responsible people
Public role relationships materialized from source observations.
Direct contact details available for logged-in users.
Havumäki Tiina KatriinaToimitusjohtajaSources: 6 · Confidence: 78%
Pirttilä Erkki OlaviPuheenjohtajaSources: 4 · Confidence: 78%
Havumäki Reino KustaaVarsinainen jäsenSources: 4 · Confidence: 78%
Havumäki Tiina KatriinaVarsinainen jäsenSources: 2 · Confidence: 78%
Kotiranta Kare IlariTilintarkastajaSources: 2 · Confidence: 78%
Erkki PirttiläRakennusinsinööriSources: 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
A2
Very goodArkkitehdit Osara Oy
Grade unchangedA2 · new analysis 2026-10-17
80/100
Medium
Usable financial evidenceFinancial data included
Financial development has been volatile across multiple domains.
4 comparable periodsRevenueImproving · 2 consecutive periods
ProfitabilityVolatile
SolvencyVolatile
LiquidityNot enough history
Same industry, size and age groupDescriptive comparison – does not change the model score.
83 peersSolvency64%
Better than 64% of peers
Profitability30%
Below 70% of peers
Revenue growth77%
Better than 77% of peers
Supporting factors
- Strong equity ratio
- Active registered status
- Long registry continuity
Risk factors to note
- Material volatility across multiple financial domains
Automatic assessment developmentChanges are derived from evidence differences between persisted automatic assessments.
2 assessmentsA2
2026-10-1780/100 · v0.15
A2 → A2A2
2026-10-1580/100 · v0.14
Oldest retained automatic assessment in this comparisonA2
2026-10-17
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 riskmedium
62/100
Industry context is medium based on normalized open statistical inputs.
Age and continuityVakiintunut
90/100
The company has about 43 years of registry continuity.
Registry and status signalsVakaa
80/100
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
15 Oct 2026 · BUSINESS.fi / Opterom LuottoluokitusAutomatic grade A2.Registry timeline
Trade register notifications shown on a timeline.
26 register eventsLatest event: 2025-05-17
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
Arkkitehdit Osara Oy shows public core facts. A company representative can claim the profile, update public information, and access owner tools.