O3 Technology OÜ

Active Registry code 14062364 OÜ Tallinn Registered 6 Jun 2016

O3 Technology OÜ is a OÜ based in Tallinn, registry code 14062364, status: active. Main activity: Constructional engineering-technical designing and consulting. According to EMTA, turnover for Q3 2026 was €319 542 with 3 employees.

Turnover

319 542 €

↓ 12.1% vs Q2 2026

State taxes

38 939 €

↓ 20.7% vs Q2 2026

Labour taxes

22 121 €

↓ 2.3% vs Q2 2026

Employees

±0 vs Q2 2026

Q3 2026 · data from the Tax and Customs Board (EMTA)

Position in the industry Architectural and engineering activities; technical testing and analysis · EMTAK 71

Turnover · Q3 2026 319 542 €

above 98% of companies

industry median 16 250 € · companies in the industry: 2 781
Labour taxes per employee 7 374 €

above 98% of companies

industry median 1 751 € · companies in the industry: 1 910
Revenue · 2025 1.5 mn €

above 98% of companies

industry median 23 548 € · companies in the industry: 4 824
Net profit margin · 2025 6.9 %

above 40% of companies

industry median 15.1 % · companies in the industry: 3 876

Taxes and turnover

Q4 2023 – Q3 2026

Turnover, € thousand Q3 2026: 319 542 € · −12.1% vs Q2 2026 · industry median 16 250 € · above 98% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Labour taxes per employee, € Q3 2026: 7 374 € · −2.3% vs Q2 2026 · industry median 1 751 € · above 98% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Employees Q3 2026: 3 · +0.0% vs Q2 2026

State taxes, € Q3 2026: 38 939 € · −20.7% vs Q2 2026

Figures by quarter
Quarter	Turnover, €	State taxes, €	Labour taxes, €	Employees
Q3 2026	319 542	38 939	22 121	3
Q2 2026	363 527	49 116	22 641	3
Q1 2026	297 987	40 255	21 500	3
Q4 2025	378 425	53 517	21 183	3
Q3 2025	317 581	40 115	20 834	3
Q2 2025	485 877	67 968	20 652	3
Q1 2025	437 138	51 864	19 977	5
Q4 2024	293 070	11 101	18 328	5
Q3 2024	348 715	54 974	31 499	5
Q2 2024	404 614	80 861	47 511	8
Q1 2024	330 000	58 319	39 914	10
Q4 2023	347 422	58 458	41 659	10
Q3 2023	291 334	40 584	43 415	10
Q2 2023	363 863	50 210	45 275	9
Q1 2023	341 294	50 583	42 623	9
Q4 2022	347 920	47 349	36 293	9
Q3 2022	346 532	72 886	36 800	9
Q2 2022	373 296	44 053	19 172	9
Q1 2022	284 106	33 801	21 166	5

Labour taxes per employee per month

2 458 €

Turnover per employee in the quarter

106 514 €

Q3 2026 · calculated from EMTA data

Financials by year

2016 – 2025

Revenue, € thousand 2025: 1 458 773 € · −0.1% vs 2024 · industry median 23 548 € · above 98% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Net profit, € thousand 2025: 100 105 € · +5 540.5% vs 2024 · industry median 1 536 € · above 98% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Net profit margin, % 2025: 6.9 % · +7.0 pp vs the year before · industry median 15.1 % · above 40% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Assets, € thousand 2025: 455 177 € · −13.1% vs 2024

Equity, € thousand 2025: 285 586 € · +41.7% vs 2024

Employees 2025: 3 · −40.0% vs 2024 · industry median 1 · above 80% of the industry

Company
Industry median

Industry: Architectural and engineering activities; technical testing and analysis (the EMTAK division of the main activity). Median: half of the industry is above, half below.

Financials by year
Year	Revenue, €	Net profit, €	Labour costs, €	Assets, €	Equity, €	Employees
2025	1 458 773	100 105	176 742	455 177	285 586	3
2024	1 460 629	-1 840	289 273	523 516	201 481	5
2023	1 322 122	-43 570	404 923	440 736	211 924	8
2022	1 332 173	144 485	291 402	379 849	256 569	0
2021	911 869	995	175 515	294 613	150 773	0
2020	950 239	45 032	74 946	251 332	150 709	20
2019	897 999	55 199	50 942	210 200	121 028	4
2018	—	—	—	—	—	0
2017	—	—	—	—	—	4
2016	—	—	—	—	—	0

Figures from the company’s own (non-consolidated) balance sheet and income statement. A loss is shown with a minus sign.

Financial ratios for 2025

Net profit margin

6.9 %

Net profit / revenue

Return on equity (ROE)

35.1 %

Net profit / equity

Return on assets (ROA)

22.0 %

Net profit / assets

Equity ratio

62.7 %

Equity / assets

Debt ratio

37.3 %

Liabilities / assets

Current ratio

2.00

Current assets / current liabilities

Revenue per employee

486 258 €

Revenue / average full-time employees

Labour cost per employee per month

4 910 €

Labour costs / employees / 12 months (incl. employer taxes)

Annual reports

PDFs from e-Äriregister

Annual reports
Year	Period	Filed	Report	Documents
2025	1 Jan 2025 – 31 Dec 2025	30 Jun 2026	Consolidated	e-Äriregister
2024	1 Jan 2024 – 31 Dec 2024	30 Jun 2025	Consolidated	e-Äriregister
2023	1 Jan 2023 – 31 Dec 2023	16 Apr 2024	Consolidated	e-Äriregister
2022	1 Jan 2022 – 31 Dec 2022	29 Jun 2023	Consolidated	e-Äriregister
2021	1 Jan 2021 – 31 Dec 2021	5 May 2022	Consolidated	e-Äriregister
2020	1 Jan 2020 – 31 Dec 2020	11 Jun 2021	Consolidated	e-Äriregister
2019	1 Jan 2019 – 31 Dec 2019	17 Apr 2020	Consolidated	e-Äriregister

Board

Mats Viisileht
Board member · since 24 Apr 2024
Mihkel Hiielaid
Board member · since 24 Apr 2024

Right of representation

Any member of the management board may represent the private limited company in all transactions.

Owners

Hiimek OÜ
Legal person · 16232043 · 1 500 €

25%
Martin Kiil
Natural person · 1 500 €

25%
MAVI OÜ
Legal person · 16925384 · 1 500 €

25%
Mikk Tasa
Natural person · 1 500 €

25%

Owner in

O3 Energy OÜ
100%
O3 Inseneribüroo OÜ
100%

Beneficial owners

Martin Kiil
Direct ownership · since 16 Oct 2018
Mikk Tasa
Direct ownership · since 16 Oct 2018

Founders and other persons

Martin Kiil
Founder · 1 000 € · 6 Jun 2016
Mikk Tasa
Founder · 1 000 € · 6 Jun 2016
Targo Pomerants
Founder · 1 000 € · 6 Jun 2016

shared board members, owners or beneficial owners

Activities (EMTAK)

71121Constructional engineering-technical designing and consulting Main

Rulings 18

All rulings (PDF)

Rulings
Number, date	Title	Deadline	State	Document
Ä 50031558 / 14 15 Jul 2026	Amendment under Code of Civil Procedure § 595¹ (1)		In force 15 Jul 2026	PDF
Ä 50031558 / 13 25 Apr 2025	Amendment entry		In force 25 Apr 2025	PDF
Ä 50031558 / 12 24 Apr 2024	Amendment entry		In force 24 Apr 2024	PDF
Ä 50031558 / 11 19 Apr 2024	Amendment entry		In force 19 Apr 2024	PDF
Ä 50031558 / 10 14 Sep 2023	Amendment entry		In force 14 Sep 2023	PDF
Ä 50031558 / 9 2 Sep 2023	Amendment entry		In force 2 Sep 2023	PDF
Ä 50031558 / 9 2 Sep 2023	Amendment entry		In force 2 Sep 2023	PDF
Ä 50031558 / 8 1 Feb 2023	Amendment under Code of Civil Procedure § 595¹ (1)		In force 1 Feb 2023	PDF
Ä 50031558 / 7 8 Sep 2022	Amendment entry		In force 8 Sep 2022	PDF
Ä 50031558 / M3 25 Aug 2022	Ruling to eliminate deficiencies	8 Sep 2022	Deficiencies eliminated 8 Sep 2022	PDF
Ä 50031558 / 6 2 Mar 2020	Amendment entry		In force 2 Mar 2020	PDF
Ä 50031558 / M2 14 Feb 2018	Ruling to eliminate deficiencies	28 Feb 2018	Deficiencies eliminated 20 Feb 2018	PDF
Ä 50031558 / 5 14 Feb 2018	Amendment entry		In force 14 Feb 2018	PDF
Ä 50031558 / 4 20 Jan 2018	Amendment entry		In force 20 Jan 2018	PDF
Ä 50031558 / 3 12 Dec 2017	Amendment entry		In force 12 Dec 2017	PDF
Ä 50031558 / M1 7 Jul 2017	Ruling to eliminate deficiencies	21 Jul 2017	Deficiencies eliminated 7 Jul 2017	PDF
Ä 50031558 / 2 7 Jul 2017	Amendment entry		In force 7 Jul 2017	PDF
Ä 50031558 6 Jun 2016	First entry		In force 6 Jun 2016	PDF

Sources: e-Äriregister and EMTA. Data updated 31 Oct 2026. Open at the source ↗ · Report an error in the data

O3 Technology OÜ

Position in the industry Architectural and engineering activities; technical testing and analysis · EMTAK 71

Taxes and turnover

Financials by year

Financial ratios for 2025

Annual reports

Board

Right of representation

Owners

Owner in

Beneficial owners

Founders and other persons

Related companies

Activities (EMTAK)

Rulings 18