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Address: Parda tn 8, 10151 Tallinn, Estonia
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Search›Companies›R-S OSA Service OÜ
14715151ActivePrivate limited companyEE102167090 · VAT-registered

R-S OSA Service OÜ

Harju maakond, Tallinn, Lasnamäe linnaosa, Suur-Sõjamäe tn 50a·EMTAK 72101 — Research and experimental development on natural sciences and engineering·7+ years
Andmed · ···
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Overview

e-Business Register · 15 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
02.05.2019e-Business Register
Address
Suur-Sõjamäe tn 50a, Lasnamäe linnaosa, Tallinn, 11415 Harju maakondADS · e-Business Register
E-mail address
kai.realo@ragnsells.come-Business Register
Principal activity
EMTAK 72101 - Research and experimental development on natural sciences and engineeringe-Business Register · ETCB
VAT number
ETCB · VAT-registered
Share capital
2600,00 €e-Business Register
Estonia's public business register
HomeViewsIndustriesBlogSourcesAbout

Public registry of Estonian companies — every fact traceable to a source and a date. Free and ad-free for everyone.

Nimistu MTÜ
Address: Parda tn 8, 10151 Tallinn, Estonia
E-mail: info@nimistu.ee

Browse

  • Home
  • Views
  • Industries
  • Activity licences
  • Recent registrations

Data

  • 79 sources
  • Database
  • Extensions
  • MCP

Organisation

  • About
  • FAQ
  • For journalists
  • Donate
  • Donation terms
  • Refunds
  • Terms
  • Privacy
  • Contact
© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
Data · 10 sourcese-Business Register · 8 min agoMTARTKEIS · PRIAKohesioPatendiamet
e-Business Register ↗

Registered 2. mai 2019, primary activity: Research and experimental development on natural sciences and engineering. Main place of business in Lasnamäe linnaosa, Tallinn, Harju maakond.

Revenue 2026 II kv
94 551 €
▼ 50% vs 2025 II kv
As of 10.07.2026 (MTA)
Employees
8
2026 (MTA)
Taxes paid
59 828 €
State + labour taxes · 2026 II kv
Tax debt
0 €
As of 11.08.2026 (MTA)
Revenue 2026 (I-II kv)
125k €
▼ 75% vs 2025 I-II kv
As of 10.07.2026 (MTA)
Employees
8
2026 (MTA)
Taxes paid
174k €
State + labour taxes · 2026 (I-II kv)
Tax debt
€0
As of 11.08.2026 (MTA)

Officers (2)

e-Business Register · 15 h ago
AS
Alar Saluste
Born 1985 · 40 y · board member since 27.04.2021
Board member
Kai Realo
Kai Realo
Born 1967 · 58 y · board member since 01.09.2021
Board member

Founders

e-Business Register · 15 h ago
RA
RAGN-SELLS ASLEGAL PERSON
Legal person · 10306958 · founder since 30.04.2019
Founder · 3k €

Shareholders

e-Business Register · 15 h ago
RA
RAGN-SELLS ASLEGAL PERSON
Legal person · 10306958 · shareholder since 01.09.2023
Shareholder 100% · 3k €

Annual reports (7)

e-Business Register · annual reports · 6 päeva tagasi
Revenue 2025
110 €
↘ -99.8% vs 2024
State taxes 2025
239k €
↗ +19.2% vs 2024
Employees 2025
6
0.0% vs 2024
YearRevenueProfit

Taxes, revenue and employees

Estonian Tax and Customs Board · 10.07.2026 as of
1,0m €500k €0

Patents (3 · 2 active)

Estonian Patent Office · patents, utility models, EU validations
EU patent1(0 active)Utility model2
01613Active

A method for synthesizing precpitated calcium carbonate

Utility model · IPC C01F 11/18,B01D 53/62,B09B 3/80,B09B 101/30,B09B 101/55
Filed 31.05.2020
01614Active

A multistage method for producing precipitated calcium carbonate and silica concentrate from calcium and silica containing waste and by-products

Utility model · IPC C01F 11/18,B01D 53/62,B09B 3/80
Filed 31.05.2020

Grants (7 · 5,2m €)

EIS + PRIA + Kohesio + Estonian Unemployment Insurance Fund
FunderGrantsTotalShare
EIS
5
4,0m €
Kohesio
2
1,2m €
R-S OSA Service OÜ Applied Research for the production of PCC from Deposited Oil Shale Ash
KohesioÜhtekuuluvuspoliitika fond (JTF)Just Transition Fund2024
1 004 229 €

Public procurements (16 · 4,1m €)

Procurement Register · 14 h tagasi
Awards
16
2019–2025 · 7 years
Total amount
4,1m €
avg 255k €
Suppliers
15
top: OÜ OTTER AG
Latest
02.12.2025
50k € · R-S OSA Service OÜ
SuppliersAll16OÜ OTTER AG2RVT Ehitus OÜ1

State-sector payments (6 · 876k €)

RTK Makseandmik · 15.05.2026
Transactions
6
2024–2025 · 2 years
Total amount
876k €
avg 146k €
Buyers
1
State and municipal bodies
Latest
23.12.2025
321k € · MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM

2025: 520k € · 2024: 356k €

20254 transactions · 520k €
23.122025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158

History

last 2 years · MTA + ÄR + MTR + Procurements
2026
14.07.2026ReportEsitati 2025. aasta aruanne— Käive 110 €
2025
30.06.2025ReportEsitati 2024. aasta aruanne— Käive 50 176 €

Connected companies

Same-person ties · e-Business Register

R-S OSA Service OÜ is connected to 4 other companies through 1 person who hold a role here and elsewhere. The strongest tie runs through Kai Realo (4 companies).

Total connections
4
via 1 person
Connecting people
1
Active here
Distinct roles
1
Board member
Strongest tie
Kai
4 companies
Via personKai Realo
Equity
Assets
Employees
2025110 €−763 066 €2,5m €2,7m €614.07.2026
202450 176 €−864 726 €474k €695k €630.06.2025
2023400 €−1 157 341 €339k €469k €531.05.2024
2022125 €−1 160 614 €106k €404k €329.06.2023
2021–−975 812 €317k €466k €108.09.2022
2020–−81 721 €743k €775k €128.06.2021
2019–−55 571 €87k €169k €131.10.2020
Original files in PDF – the full register on e-Business Register.View reports on e-Business Register
20222023202420252026
YearRevenue (a)State taxesTaxes on workforceEmployees (Q4)
2026I-II Q124 681 €54 956 €118 902 €8
20251 604 433 €238 529 €256 809 €6
2024619 912 €200 053 €199 566 €7
2023762 268 €164 246 €172 621 €5
2022506 045 €83 216 €84 021 €5
Quarterly breakdown
YearQ1Q2Q3Q4
Revenue 202630k €95k €––
State taxes 202655k €0 €––
Taxes on workforce 202659k €60k €––
Employees 202668––
Revenue 2025300k €189k €985k €129k €
State taxes 202555k €72k €56k €56k €
Taxes on workforce 202558k €78k €60k €60k €
Employees 20257776
Revenue 2024182k €134k €70k €234k €
State taxes 202441k €42k €65k €52k €
Taxes on workforce 202443k €44k €57k €56k €
Employees 20245667
Revenue 2023201k €114k €59k €388k €
State taxes 202336k €42k €48k €39k €
Taxes on workforce 202337k €44k €51k €41k €
Employees 20235555
Revenue 202248k €112k €227k €119k €
State taxes 202210k €22k €24k €27k €
Taxes on workforce 202211k €20k €25k €28k €
Employees 20221345
E024809

A TWO STAGES EXTRACTION METHOD FOR SYNTHESIZING PRECIPITATED CALCIUM CARBONATE

EU patent · IPC C01D 7/12,C01F 11/18
Filed 31.05.2020
R-S OSA Service OÜ Demo plant for the production of PCC from Oil Shale Ash
EISIda-Viru ettevõtjate teadmusmahukate tegevuste (piloottaristu rajamine) toetusÕiglase ülemineku fond (ÕÜF)2023
1 327 262 €
R-S OSA Service OÜ Applied Research for the production of PCC from Deposited Oil Shale Ash
EISIda-Viru ettevõtjate teadmusmahukate tegevuste (rakendusuuringud ja tootearendus) toetusÕiglase ülemineku fond (ÕÜF)2023
1 004 229 €
Applied research on Magnesium reduction from PCC production residuals
EISRakendusuuringute toetusRiigieelarve (RE)2022
225 376 €
Applied research on PCC production from deposited ash
EISRakendusuuringute toetusEuroopa Regionaalarengu fond (ERDF)2021
1 214 325 €
Piloting OSA-PCC technology
EISRakendusuuringute toetusEuroopa Regionaalarengu fond (ERDF)2021
252 754 €
Show remaining (1)
R-S OSA Service OÜ põlevkivituha väärindamise ja ringlusse suunamise võimaluste rakendusuuring
KohesioÜhtekuuluvuspoliitika fond (ERDF)European Regional Development Fund2019
204 191 €
AFRY Finland Oy1
SPX Flow Technology Danmark A/S1
ENVITES spol. s r.o.1
Nordpipe Composite Engineering Oy1
Metso Outotec Finland Oy1
Tallinna Tehnikaülikool1
Show all buyers (7)
SIA Alfa Laval1Laitex Oy1Tholander Ablufttechnik GmbH1IBC International Handling AB1OÜ SKEEM1Nomine Consult OÜ1Aktsiaselts Teramet1

Awards by year

12 yr · total 4,1m €
250k €
251k €
49k €
1,9m €
1,6m €
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
20253 awards1,6m €
02.122025
Lab tests for the study of plateau ash valorisation
ServicesNotice 324cb88e-52fe-41fe-a109-31a16b40451d
OÜ OTTER AG
10993663
50 000 €
Award value
25.082025
PCC DEMO PLANT ERECTION AND INSTALLATION
ServicesNotice 829da6f0-aad3-413a-aadf-d39ba5eabba6
RVT Ehitus OÜ
12587683
1 534 151 €
Award value
16.012025
Lab tests for the study of plateau ash valorisation
ServicesNotice ac7366c7-9d1a-4920-aee6-4e56b8aff6d2
OÜ OTTER AG
10993663
50 000 €
Award value
202410 awards1,9m €
05.112024
PCC Dewatering – Decanter Centrifuge
ServicesNotice 66eb91fa-a3eb-4706-b1d6-d313931502c4
SIA Alfa Laval
40003320092
154 220 €
Award value
05.112024
Ash Pre-Treatment – Crusher, Coarse Step
ServicesNotice 565724dc-382e-42f7-ad1a-8f359978199d
Laitex Oy
0634322-3
135 154 €
20221 award49k €
06.052022
Owners engineering services for R-S OSA project ITB demo plant feed study
ServicesNotice ted-2022-5-259
Nomine Consult OÜ
14232790
48 950 €
Award value
20211 award251k €
01.042021
Piloting for scaling up main processes of synthetic calcium carbonate production from oil shale ash
ServicesNotice ted-2021-5-1168
Metso Outotec Finland Oy
1094259-5
251 000 €
Award value
20191 award250k €
10.122019
Põlevkivituha väärindamise ja ringlusse suunamise võimaluste rakendusuuring
ServicesNotice ted-2020-5-1008
Tallinna Tehnikaülikool
74000323
250 000 €
Award value
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
321 411 €
01.122025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
82 593 €
15.042025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
42 189 €
13.032025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
73 672 €
20241 transaction · 101k €
04.072024
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
101 099 €
Show remaining 1 transactions+
20241 transaction · 255k €
29.022024
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus muudes majandusharudes
254 838 €
4
KR
Kai Realo
board member
4 other companies›
CompanyRoleReg. code
OÜ Pandipakendi Automatiseeritud Käitlussüsteem
Board member
11237975
R-S Packing OÜ
Board member
11532533
RAGN-SELLS AS
Board member
10306958
Swedbank AS
Supervisory board member
10060701
Award value
30.102024
Process Pumps
ServicesNotice 50170bb7-6327-4acb-a637-c19dda2e029f
Aktsiaselts Teramet
10282076
15 899 €
Award value
29.102024
Pressure Filters
ServicesNotice 270fd308-211e-4552-86a5-e05151433193
ENVITES spol. s r.o.
CZ13690035
332 890 €
Award value
28.102024
Vent Gas Scrubber System
ServicesNotice cb258b34-23ec-4336-aa20-9e0ba43de486
Tholander Ablufttechnik GmbH
61151
101 969 €
Award value
23.102024
PCC Dryer
ServicesNotice beab9afa-d5d2-4c2a-ac27-3bd69666ddb7
SPX Flow Technology Danmark A/S
CVR 24730018
338 911 €
Award value
21.102024
Tanks and Agitators
ServicesNotice 98e688e6-3f70-4334-a134-c50e09cee931
Nordpipe Composite Engineering Oy
FI09372986
271 000 €
Award value
21.102024
Screw Conveyors
ServicesNotice e88ab38f-7c5d-4008-ad89-167abb7682cf
IBC International Handling AB
5562472091
81 208 €
Award value
07.032024
R-S OSA OÜ OWNER'S ENGINEERING SERVICES
ServicesNotice ca092723-bac6-46d6-9021-e1d0ba15eac3
OÜ SKEEM
12089956
73 500 €
Award value
09.022024
Demo plant detailed engineering
ServicesNotice ee074b8a-1ee7-44a7-ad03-337e1df39119
AFRY Finland Oy
0625905-6
383 482 €
Award value

Analysis · 2025

computed from annual reports
Revenue110 €median 22k €0% of the sector median
Net margin-693,696.4%median 22.4%-693,718.8 pp vs sector median
Revenue per employee18,33 €median 42k €0% of the sector median
Revenue change-99.8%median -0.6%-99.1 pp vs sector median
Equity ratio91.5%
Current ratio4.04
Labour cost of revenue540,374.5%
Profit per employee−127 178 €
Compared with2024revenue 50k €

Peer group: Teadus- ja arendustegevus loodus- ja tehnikateaduste vallas, 400 trading companies that filed a report in the last three years.

Founded 2019. That year 16,302 osaühing were registered; 15,709 are still trading, or 96.4%.