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O3 Inseneribüroo OÜ

Legal form:

Private limited company

Registry code:

12321790

VAT no.:

EE101632351

Fiscal-year period:

01.01 - 31.12

Established:

30.07.2012 (13)

Capital:

2 500 EUR

Address:

Tolli tn 7, Kuressaare linn, Saaremaa vald, Saare maakond, 93813

Status:

Registered

E-arvete vastuvõtmine:

Telema

Contacts

Email:

info@o3.ee

Phone:

+372 53870338

Phone:

+372 53870338

Industries

PROFESSIONAL, SCIENTIFIC AND TECHNICAL ACTIVITIES
Architectural & engineering activities; technical testing and analysis
Architectural & engineering activities and technical consultancy
Engineering activities and related technical consultancy
71121 - Construction engineering design and consultancy

VAT liability

	Start	End
EE101632351	01.05.2013

Annual reports

Aggregate data

	Period	Submitted
2025	01.01.2025 - 31.12.2025	30.06.2026	Valid
2024	01.01.2024 - 31.12.2024	30.06.2025	Valid
2023	01.01.2023 - 31.12.2023	16.04.2024	Valid
2022	01.01.2022 - 31.12.2022	29.06.2023	Valid
2021	01.01.2021 - 31.12.2021	05.05.2022	Valid
2020	01.01.2020 - 31.12.2020	11.06.2021	Valid
2019	01.01.2019 - 31.12.2019	17.04.2020	Valid
2018	01.01.2018 - 31.12.2018	12.04.2019	Valid
2017	01.01.2017 - 31.12.2017	02.03.2018	Valid
2016	01.01.2016 - 31.12.2016	27.02.2017	Valid
2015	01.01.2015 - 31.12.2015	02.02.2016	Valid
2014	01.01.2014 - 31.12.2014	01.07.2015	Valid
2013	30.07.2012 - 31.12.2013	18.06.2014	Valid

Unsubmitted declarations

No unsubmitted declarations found

No unsubmitted declarations as of 22.07.2026.

???

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020406080100

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Tax data

	State taxes	Labour taxes	Taxable turnover	Employees
2026 Q2	97 773 €	63 903 €	162 595 €2.9%	17
2026 Q1	96 960 €	61 687 €	167 446 €13.9%	16
Kokku 2026:	194 733 €	125 590 €	330 041 €
2025 Q4	94 252 €	64 082 €	146 997 €17.5%	15
2025 Q3	110 452 €	74 145 €	178 272 €3.8%	16
2025 Q2	129 115 €	86 573 €	171 754 €3.0%	18
2025 Q1	110 999 €	73 991 €	176 976 €5.5%	18
Kokku 2025:	444 818 €	298 791 €	673 999 €1.1%
2024 Q4	68 446 €	46 367 €	187 297 €1.6%	18
2024 Q3	103 655 €	57 789 €	184 364 €29.7%	20
2024 Q2	103 842 €	76 074 €	142 177 €7.1%	14
2024 Q1	56 535 €	40 149 €	152 962 €8.5%	15
Kokku 2024:	332 478 €	220 379 €	666 800 €8.7%
2023 Q4	79 193 €	55 270 €	140 954 €13.9%	14
2023 Q3	93 675 €	65 986 €	163 782 €6.7%	14
2023 Q2	83 468 €	57 605 €	153 564 €0.9%	16
2023 Q1	88 218 €	62 051 €	155 024 €2.8%	15
Kokku 2023:	344 554 €	240 912 €	613 324 €9.5%
2022 Q4	76 607 €	50 343 €	150 874 €47.2%	14
2022 Q3	70 917 €	55 297 €	102 479 €37.6%	15
2022 Q2	82 759 €	55 586 €	164 272 €15.4%	15
2022 Q1	76 831 €	53 652 €	142 341 €14.2%	19
Kokku 2022:	307 115 €	214 878 €	559 966 €40.4%
2021 Q4	67 314 €	49 351 €	124 594 €85.2%	17
2021 Q3	55 150 €	47 790 €	67 268 €25.2%	16
2021 Q2	55 602 €	45 642 €	89 939 €23.2%	16
2021 Q1	60 465 €	45 460 €	117 066 €18.3%	16
Kokku 2021:	238 530 €	188 242 €	398 867 €27.7%
2020 Q4	62 277 €	39 485 €	143 322 €3.2%	12
2020 Q3	63 640 €	40 987 €	138 892 €1.8%	12
2020 Q2	63 087 €	32 467 €	141 424 €10.3%	13
2020 Q1	47 816 €	38 755 €	128 260 €13.4%	13
Kokku 2020:	236 820 €	151 694 €	551 898 €8.0%
2019 Q4	62 439 €	48 297 €	113 137 €28.1%	12
2019 Q3	67 383 €	44 934 €	157 373 €13.3%	15
2019 Q2	63 625 €	42 228 €	138 858 €36.3%	14
2019 Q1	50 721 €	35 795 €	101 872 €6.9%	14
Kokku 2019:	244 168 €	171 254 €	511 240 €6.1%
2018 Q4	57 095 €	39 218 €	109 389 €24.1%	13
2018 Q3	58 766 €	42 143 €	144 072 €84.0%	14
2018 Q2	39 661 €	34 353 €	78 316 €47.8%	15
2018 Q1	63 412 €	44 658 €	150 029 €42.2%	15
Kokku 2018:	218 934 €	160 372 €	481 806 €32.1%
2017 Q4	79 156 €	44 443 €	259 765 €42.0%	13
2017 Q3	72 038 €	43 308 €	182 874 €24.2%	18
2017 Q2	56 787 €	37 203 €	147 244 €23.3%	18
2017 Q1	48 549 €	34 520 €	119 453 €24.6%	17
Kokku 2017:	256 530 €	159 474 €	709 336 €53.1%
2016 Q4	47 017 €	33 081 €	158 411 €38.6%	15
2016 Q3	37 678 €	23 869 €	114 299 €12.0%	15
2016 Q2	28 874 €	21 311 €	102 047 €15.1%	15
2016 Q1	31 726 €	18 522 €	88 693 €7.6%	15
Kokku 2016:	145 295 €	96 783 €	463 450 €84.0%
2015 Q4	21 610 €	14 425 €	95 996 €54.0%	1
2015 Q3	19 499 €	9 365 €	62 321 €24.5%	1
2015 Q2	16 437 €	7 520 €	50 046 €15.0%	1
2015 Q1	10 816 €	6 540 €	43 522 €	1
Kokku 2015:	68 362 €	37 850 €	251 885 €

Revenue by industry

	2023	2024	2025
Construction engineering design and consultancy	598 660 €	683 447 €	664 849 €

Tax debts

No tax debt found

No tax debt as of 22.07.2026

Representatives

Name	Personal ID code	Date of birth	Role	Start	End
Mats Viisileht	39001XXXXXX	04.01.1990 (36)	Board member	05.05.2025	-
Mihkel Hiielaid	39307XXXXXX	07.07.1993 (33)	Board member	05.05.2025	-

5 inactive record hidden, extended access to the information portal is required to view history!

1 - 2 / 2 rows

Shareholders

Name	Personal ID code	Date of birth	Role	Share	%	Type	Start	End
O3 Technology OÜ	-	06.06.2016 (10)	Shareholder	2 500,00 EUR	100	Sole ownership	01.09.2023	-

13 inactive record hidden, extended access to the information portal is required to view history!

1 - 1 / 1 rows

Other persons

Name	Personal ID code	Date of birth	Role	Start	End
Mikk Tasa	38705XXXXXX	11.05.1987 (39)	Founder	30.07.2012	-

1 - 1 / 1 rows

Ultimate beneficial owners

Name	Personal ID code	Date of birth	Role	Start	End
Mats Viisileht	39001XXXXXX	04.01.1990 (36)	Member of higher governing body (board or supervisory board)	30.01.2026	-
Mihkel Hiielaid	39307XXXXXX	07.07.1993 (33)	Member of higher governing body (board or supervisory board)	30.01.2026	-

4 inactive record hidden, extended access to the information portal is required to view history!

1 - 2 / 2 rows

Holdings in companies

No holdings in companies found

Company has no holdings in other companies

2026 Q2

Turnover

Amount

162 595 €

Monthly average

54 198 €

Per employee

3 188 €

Equity ratio

2 167,93%

Labour taxes

Turnover ratio

39,30%

Tax ratio

65,36%

Monthly average

21 301 €

Per employee

1 291 €

State taxes

Monthly average

32 591 €

Turnover ratio

60,13%

Estimated salary

Gross salary

2 416 €

Net salary

1 941 €

Aggregate data

	2025	2024	2023	2022	2021	2020	2019
Current assets	138 112 €36.0%	215 665 €71.0%	126 153 €24.4%	101 449 €10.0%	92 244 €54.9%	204 548 €6.2%	192 690 €
Non-current assets	-	2 181 €79.4%	10 597 €18.9%	13 067 €26.3%	17 739 €41.7%	30 443 €29.2%	43 006 €
Total assets	138 112 €36.6%	217 846 €59.3%	136 750 €19.4%	114 516 €4.1%	109 983 €53.2%	234 991 €0.3%	235 696 €
Short-term liabilities	82 216 €50.4%	165 897 €127.6%	72 896 €11.3%	82 155 €4.9%	78 307 €13.7%	68 850 €19.9%	57 425 €
Long-term liabilities	-	-	9 000 €	-	-	-	-
Total liabilities	82 216 €50.4%	165 897 €102.6%	81 896 €0.3%	82 155 €4.9%	78 307 €13.7%	68 850 €19.9%	57 425 €
Share or stock capital	2 500 €	2 500 €	2 500 €	2 500 €	2 500 €	2 500 €	2 500 €
Retained earnings	49 449 €5.5%	52 354 €75.3%	29 861 €2.3%	29 176 €82.2%	163 641 €18.8%	137 696 €10.6%	154 106 €
Net profit	3 947 €235.9%	-2 905 €112.9%	22 493 €3 183.6%	685 €100.5%	-134 465 €618.3%	25 945 €19.8%	21 665 €
Equity	55 896 €7.6%	51 949 €5.3%	54 854 €69.5%	32 361 €2.2%	31 676 €80.9%	166 141 €6.8%	178 271 €
Turnover	664 849 €2.7%	683 447 €14.2%	598 660 €6.6%	561 799 €40.0%	401 292 €26.6%	546 784 €3.3%	529 335 €
Profit margin	0.59%239.7%	-0.43%111.3%	3.76%2 981.5%	0.12%100.4%	-33.51%806.2%	4.75%15.9%	4.09%

Financial ratios

	2025	2024	2023	2022	2021
Profit and cash flow
EBITDA	N PFU	-F JMG	VT CYF	5 354	-121 656
Liquidity
Current ratio	O.M	M.O	E.N	1.2	1.2
Quick ratio	I.Y	L.Y	H.C	1.2	1.2
Cash ratio	E.Y	B.A	S.S	0.9	0.2
Efficiency
Days sales outstanding (dso)	NT.X	EJ.O	LT.Y	34.2	61.8
Asset turnover	Y.Q	P.M	D.R	5.0	2.3
Structure
Debt ratio	A.J	H.R	Y.W	0.7	0.7
Profitability
Operating margin	S.D%	-B.M%	L.E%	0.1%	-33.5%
Net profit margin	P.C%	-V.E%	E.Y%	0.1%	-33.5%
Return on assets (roa)	Z.D%	-R.L%	QM.Z%	0.6%	-78.0%
Return on equity (roe)	P.V%	-P.L%	WY.O%	2.1%	-424.5%

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Licences & notices

Type	Number	Field	Status	Start	End
Notice of economic activity	TTV000053	- > Design, installation and maintenance of alarm systems	Valid	21.04.2025	-
Notice of economic activity	FPR000414	- > Design / engineering	Valid	08.02.2024	-
Notice of economic activity	EEP002617	- > Design / engineering	Valid	03.04.2020	-
Notice of economic activity	TEL002170	- > Electrical works	Valid	12.07.2013	-

1 - 4 / 4 rows

Regulations

Regulation no.	Date	Type	Deadline	Status
Ä 10171940 / 17	05.05.2025	Entry - Amendment entry		Entered into force (05.05.2025)
Ä 10171940 / 16	06.05.2024	Entry - Amendment entry		Entered into force (06.05.2024)
Ä 10171940 / M3	22.04.2024	Order to remedy deficiencies - Amendment entry	07.05.2024	Deficiencies remedied (29.04.2024)
Ä 10171940 / 15	01.09.2023	Entry - Amendment entry		Entered into force (01.09.2023)
Ä 10171940 / 14	11.07.2023	Entry - Amendment entry		Entered into force (11.07.2023)

O3 Inseneribüroo OÜ

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