43212Installation of signalling systems

209 companies

This activity has special requirements (e.g. a licence or notice).

Largest companies by revenue

1.Optimus Systems AS
11096397, Kesklinna linnaosa
Revenue 2025
€18.7M
+6.1%
Net profit
€123.2K
−76%
Employees
80
2.OÜ SELKO SECURITY
10086646, Tartu linn
Revenue 2025
€3.4M
−26%
Net profit
€145K
−78%
Employees
18
3.Nõrkvoolu Paigalduse OÜ
11072221, Tänassilma küla
Revenue 2025
€3.2M
+4.9%
Net profit
€23.7K
−43%
Employees
45
4.Alarmest Osaühing
10614111, Pirita linnaosa
Revenue 2025
€2.9M
+7.1%
Net profit
€255K
+141%
Employees
14
5.aktsiaselts Salalux
10216020, Viljandi linn
Revenue 2025
€1.8M
+10%
Net profit
€73.7K
−28%
Employees
18
6.osaühing HENERT GRUPP
10782185, Kristiine linnaosa
Revenue 2025
€1.2M
−7.7%
Net profit
€44.9K
−64%
Employees
19
7.OÜ SECURER
11499043, Tartu linn
Revenue 2025
€861.2K
+9%
Net profit
€65.7K
−6.6%
Employees
6
8.CitySecurity OÜ
11882061, Kristiine linnaosa
Revenue 2025
€754K
+2.8%
Net profit
−€4.5K
−119%
Employees
9
9.Osaühing Hedengren Eesti
10256870, Peetri alevik
Revenue 2025
€741.9K
+12%
Net profit
−€39K
−1,620%
Employees
8
10.NANO Turvasüsteemide Osaühing
10313272, Viljandi linn
Revenue 2025
€733.8K
−15%
Net profit
€51.4K
−51%
Employees
12

#	Company	Reg.	Revenue	Change	Net profit	Change	Employees
1	Optimus Systems AS 11096397, Kesklinna linnaosa	2005	€18,653,614 2025	+6.1%	€123,165	−76%	80 annual average (FTE)
2	OÜ SELKO SECURITY 10086646, Tartu linn	1996	€3,428,194 2025	−26%	€144,991	−78%	18 annual average (FTE)
3	Nõrkvoolu Paigalduse OÜ 11072221, Tänassilma küla	2004	€3,191,340 2025	+4.9%	€23,735	−43%	45 annual average (FTE)
4	Alarmest Osaühing 10614111, Pirita linnaosa	1999	€2,895,077 2025	+7.1%	€255,025	+141%	14 annual average (FTE)
5	aktsiaselts Salalux 10216020, Viljandi linn	1997	€1,823,770 2025	+10%	€73,699	−28%	18 annual average (FTE)
6	osaühing HENERT GRUPP 10782185, Kristiine linnaosa	2001	€1,178,756 2025	−7.7%	€44,948	−64%	19 annual average (FTE)
7	OÜ SECURER 11499043, Tartu linn	2008	€861,204 2025	+9%	€65,719	−6.6%	6 annual average (FTE)
8	CitySecurity OÜ 11882061, Kristiine linnaosa	2010	€753,974 2025	+2.8%	−€4,491	−119%	9 annual average (FTE)
9	Osaühing Hedengren Eesti 10256870, Peetri alevik	1997	€741,882 2025	+12%	−€38,963	−1,620%	8 annual average (FTE)
10	NANO Turvasüsteemide Osaühing 10313272, Viljandi linn	1997	€733,811 2025	−15%	€51,371	−51%	12 annual average (FTE)

Includes

This class includes the installation, repair and maintenance of signalling systems in all types of buildings and civil engineering structures. This class includes: - installation of: fire alarms; burglar-alarm systems - electrical signalling systems

Also includes

installation of emergency and security alarms without subsequent monitoring service installation of smoke detectors

Excludes

construction of distribution lines for electricity and telecommunication, see 42221 construction of solar and wind energy farms, see 42221 construction of stations for distribution of electricity (e.g. for electrical vehicles), see 42221 installation of lightning conductors, see 43241 monitoring and remote monitoring of electronic security systems (e.g. burglar alarms and fire alarms, including their installation and maintenance), see 80091