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

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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 · 12 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
  • Recent registrations

Data

  • 72 sources
  • Database
  • Extensions
  • MCP

Organisation

  • About
  • For journalists
  • Donation terms
  • Refunds
  • Terms
  • Privacy
  • Contact
© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
Data · 11 sourcese-Business Register · 6 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 (I kv)
30 130 €
▼ 90% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
6
2026 (MTA)
Taxes paid
114 030 €
State + labour taxes · 2026 (I kv)
Tax debt
0 €
As of 27.06.2026 (MTA)
Revenue 2026 (I kv)
30k €
▼ 90% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
6
2026 (MTA)
Taxes paid
114k €
State + labour taxes · 2026 (I kv)
Tax debt
€0
As of 27.06.2026 (MTA)

Officers (2)

e-Business Register · 12 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 · 12 h ago
RA
RAGN-SELLS ASLEGAL PERSON
Legal person · 10306958 · founder since 30.04.2019
Founder · 3k €

Shareholders

e-Business Register · 12 h ago
RA
RAGN-SELLS ASLEGAL PERSON
Legal person · 10306958 · shareholder since 01.09.2023
Shareholder 100% · 3k €

Beneficial owners (3)

e-Business Register · 12 h ago
ER
Erik Ragnar Sellberg
Born 1954 · 71 y · ultimate beneficial owner since 26.04.2021
Ultimate beneficial owner
GR
Gertrud Ragnhil Jackson
· ultimate beneficial owner since 26.04.2021
Ultimate beneficial owner
KA
Kristina Axelia Östlund
· ultimate beneficial owner since 26.04.2021
Ultimate beneficial owner

Annual reports (6)

e-Business Register · annual reports · 14 h tagasi
Revenue 2024
50k €
↗ +12444% vs 2023
State taxes 2025
239k €
↗ +19.2% vs 2024
Employees 2024
6
↗ +20.0% vs 2023
YearRevenueProfit

Taxes, revenue and employees

Estonian Tax and Customs Board · 10.04.2026 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 · 11 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 OÜ1AFRY Finland Oy1SPX Flow Technology Danmark A/S1ENVITES spol. s r.o.1Nordpipe Composite Engineering Oy1Metso Outotec Finland Oy1Tallinna 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
20242 awards289k €
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 €
Award value
Show remaining 11 awards+
20248 awards1,6m €
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
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

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
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 13 other companies through 4 people who hold a role here and elsewhere. The strongest tie runs through Kai Realo (4 companies).

Total connections
13
via 4 people
Connecting people
4
Active here
Distinct roles
2
Board member · Ultimate beneficial owner
Strongest tie
Kai
4 companies
Via personKai Realo
Equity
Assets
Employees
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 Q30 130 €54 956 €59 074 €6
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 €–––
State taxes 202655k €–––
Taxes on workforce 202659k €–––
Employees 20266–––
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 €
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
Erik Ragnar Sellberg3
Gertrud Ragnhil Jackson3
Kristina Axelia Östlund3
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
ER
Erik Ragnar Sellberg
ultimate beneficial owner
3 other companies›
CompanyRoleReg. code
OÜ Pandipakendi Automatiseeritud Käitlussüsteem
Ultimate beneficial owner
11237975
R-S Packing OÜ
Ultimate beneficial owner
11532533
GR
Gertrud Ragnhil Jackson
ultimate beneficial owner
3 other companies›
CompanyRoleReg. code
OÜ Pandipakendi Automatiseeritud Käitlussüsteem
Ultimate beneficial owner
11237975
R-S Packing OÜ
Ultimate beneficial owner
11532533
KA
Kristina Axelia Östlund
ultimate beneficial owner
3 other companies›
CompanyRoleReg. code
OÜ Pandipakendi Automatiseeritud Käitlussüsteem
Ultimate beneficial owner
11237975
R-S Packing OÜ
Ultimate beneficial owner
11532533
RAGN-SELLS AS
Supervisory board memberUltimate beneficial owner
10306958
RAGN-SELLS AS
Ultimate beneficial owner
10306958
RAGN-SELLS AS
Ultimate beneficial owner
10306958