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Search›Companies›Patendibüroo KÄOSAAR OÜ
10081689ActivePrivate limited companyEE100019975 · VAT-registered

Patendibüroo KÄOSAAR OÜ

Tartu maakond, Tartu linn, Tartu linn, Tähe tn 94·EMTAK 69109 — Other legal activities·29+ years
Andmed · ···
On this page
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Overview

e-Business Register · 22 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
21.08.1996e-Business Register
Address
Tähe tn 94, Tartu linn, Tartu linn, 50107 Tartu maakondADS · e-Business Register
E-mail address
info@kaosaar.eee-Business Register
Website
www.kaosaar.eee-Business Register · domain active
Telephone
+372 7383051· Telia Eesti ASe-Business Register · TTJA NBA
Principal activity
EMTAK 69109 - Other legal activitiese-Business Register · ETCB
VAT number
ETCB · VAT-registered
Share capital
30 000,00 €e-Business Register
nimistu
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

  • 72 sources
  • Database
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  • MCP

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  • Donate
  • Donation terms
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© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
Data · 13 sourcese-Business Register · 3 min agoMTARTKEUIPOPatendiametBuiltWithWeb tech scanEesti Internet
e-Business Register ↗

Registered 21. august 1996, primary activity: Other legal activities. Main place of business in Tartu linn, Tartu linn, Tartu maakond.

Revenue 2026 (I kv)
256 412 €
▼ 2% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
10
2026 (MTA)
Taxes paid
111 905 €
State + labour taxes · 2026 (I kv)
Tax debt
0 €
As of 06.07.2026 (MTA)
Revenue 2026 (I kv)
256k €
▼ 2% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
10
2026 (MTA)
Taxes paid
112k €
State + labour taxes · 2026 (I kv)
Tax debt
€0
As of 06.07.2026 (MTA)

Officers (3)

e-Business Register · 22 h ago
KK
Kalev Käosaar
Born 1974 · 52 y · board member since 26.10.2007
Board member
AK
Anneli Kapp
Born 1979 · 46 y · board member since 26.03.2014
Board member
KA
Kristiina Aasna
Born 1982 · 43 y · board member since 12.03.2026
Board member

Shareholders (7)

e-Business Register · 22 h ago
0%50%100%
Founder / management
100.0% · 7
#ShareholderType%€
1
Kalev Käosaar
Founder / management

Beneficial owners (2)

e-Business Register · 22 h ago
KK
Kalev Käosaar
Born 1974 · 52 y · ultimate beneficial owner since 09.10.2018
Ultimate beneficial owner
AK
Anneli Kapp
Born 1979 · 46 y · ultimate beneficial owner since 09.10.2018
Ultimate beneficial owner

Subsidiaries

e-Business Register · shareholders · 22 h ago

Patendibüroo KÄOSAAR OÜ is a shareholder or officer in 1 more company.

Patendibüroo KÄOSAAR OÜ
Shareholder 5%

Annual reports (7)

e-Business Register · annual reports · 4 päeva tagasi
Revenue 2025
899k €
↘ -14.8% vs 2024
State taxes 2025
323k €
↘ -9.1% vs 2024
Employees 2025
8
↘ -11.1% vs 2024
YearRevenueProfit

Taxes, revenue and employees

Estonian Tax and Customs Board · 10.04.2026 as of
1,0m €500k €0

Tech stack

BuiltWith · 4 päeva tagasi
Domains (7)
www.kaosaar.ee
SRCÄriregister
droneacademy.ee
NSZone.ee
REGZone Media OÜ
SRCEIS WHOIS
Could not analyse (fetch failed)
drooniakadeemia.ee

Trademarks (2 · 1 ended)

Patendiamet · 17.05.2026
V Minutivalve
5 classes · figurative-word · 27.03.2024 · M202400304
Registered
KÄOSAAR
2 classes · figurative-word · 16.10.2014 · M201401114
Registered
Show ended (1)

State-sector payments (47 · 55k €)

RTK Makseandmik · 15.05.2026
Transactions
47
2024–2026 · 3 years
Total amount
55k €
avg 1k €
Buyers
10
State and municipal bodies
Latest
31.03.2026
615,04 € · Tallinna Tehnikaülikool

2026: 9k € · 2025: 25k € · 2024: 22k €

BuyerTxAmountShare
Tartu Ülikool
74001073
15

History

last 2 years · MTA + ÄR + MTR + Procurements
2026
23.04.2026ReportEsitati 2025. aasta aruanne— Käive 899 403 €
31.03.2026OfficerSai osanikuks3×expand ›hide ⌃
  • Patendibüroo KÄOSAAR OÜ · · 5 %
  • Anneli Kapp · · 31 %
  • Aivo Arula · · 10 %
31.03.2026FilingMuutmiskanne

Connected companies

Same-person ties · e-Business Register

Patendibüroo KÄOSAAR OÜ is connected to 13 other companies through 4 people who hold a role here and elsewhere. The strongest tie runs through Kalev Käosaar (10 companies).

Total connections
13
via 4 people
Connecting people
4
Active here
Distinct roles
3
Board member · Shareholder
Strongest tie
Kalev
10 companies
Via personKalev Käosaar
34.00%
10k €
2
Anneli Kapp
Founder / management31.00%9k €
3
Kristiina Aasna
Founder / management10.00%3k €
4
Aivo Arula
Founder / management10.00%3k €
5
Kärt Kuuseväli
Founder / management5.00%2k €
6
Adrien Hanouar Renaudo
Founder / management5.00%2k €
7
Patendibüroo KÄOSAAR OÜ
Founder / management5.00%2k €
Concentration

How tightly the cap table is held. Top-N shows the combined stake of the largest N shareholders; the 80% line is the smallest group that together controls 80%; Gini is 0 when stakes are perfectly equal, 1 when one holder owns everything.

Top 1
34.0%
Top 3
75.0%
Top 5
90.0%
Top 10
100.0%
80% line
4 of 7
Gini
0.41

Dominant holder: 34.0% – non-controlling but blocking.

KK
Kalev Käosaar
Born 1974 · 52 y · shareholder since 09.06.2025
Shareholder 34% · 10k €
AK
Anneli Kapp
Born 1979 · 46 y · shareholder since 31.03.2026
Shareholder 31% · 9k €
KA
Kristiina Aasna
Born 1982 · 43 y · shareholder since 08.04.2025
Shareholder 10% · 3k €
AA
Aivo Arula
Born 1963 · 62 y · shareholder since 31.03.2026
Shareholder 10% · 3k €
KK
Kärt Kuuseväli
Born 1986 · 40 y · shareholder since 01.09.2023
Shareholder 5% · 2k €
AH
Adrien Hanouar Renaudo
Born 1979 · 47 y · shareholder since 09.09.2024
Shareholder 5% · 2k €
PK
Patendibüroo KÄOSAAR OÜLEGAL PERSON
Legal person · 10081689 · shareholder since 31.03.2026
Shareholder 5% · 2k €
Equity
Assets
Employees
2025899 403 €32 875 €771k €844k €823.04.2026
20241 056 091 €118 777 €848k €934k €929.04.2025
20231 098 635 €192 650 €894k €990k €1028.02.2024
20221 076 347 €131 654 €796k €897k €1021.02.2023
20211 157 058 €62 779 €703k €776k €902.04.2022
20201 225 970 €129 843 €840k €898k €1322.06.2021
20191 304 718 €207 444 €875k €961k €1330.06.2020
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 Q256 412 €65 230 €46 675 €10
20251 123 001 €322 681 €195 587 €11
20241 487 791 €354 957 €187 181 €11
20231 340 600 €299 866 €176 817 €10
20221 453 334 €289 034 €172 602 €14
Quarterly breakdown
YearQ1Q2Q3Q4
Revenue 2026256k €–––
State taxes 202665k €–––
Taxes on workforce 202647k €–––
Employees 202610–––
Revenue 2025263k €260k €278k €322k €
State taxes 202570k €101k €71k €81k €
Taxes on workforce 202548k €49k €50k €50k €
Employees 202511111111
Revenue 2024443k €414k €312k €320k €
State taxes 2024102k €97k €72k €83k €
Taxes on workforce 202450k €41k €46k €51k €
Employees 202410111211
Revenue 2023350k €332k €328k €331k €
State taxes 202396k €66k €69k €69k €
Taxes on workforce 202348k €42k €43k €44k €
Employees 202314131210
Revenue 2022309k €308k €330k €506k €
State taxes 202263k €77k €63k €86k €
Taxes on workforce 202243k €46k €41k €43k €
Employees 202215141414
NSZone.ee
REGZone Media OÜ
SRCEIS WHOIS
Could not analyse (fetch failed)
kaosaar.ee
SPFDMARC
NSZone.ee
REGZone Media OÜ
SRCEIS WHOIS
Detected technologies
OtherOpen Graph · Schema.org
JavaScript libraryjQuery
AnalyticsGoogle Analytics
Tag managerGoogle Tag Manager
Web serverApache
techno.ee
SPF
MXMicrosoft 365
NSAzure DNS
REGZone Media OÜ
SRCEIS WHOIS
Detected technologies
OtherOpen Graph · Schema.org
E-commerceWooCommerce
JavaScript libraryjQuery
AnalyticsGoogle Analytics
Web serverApache
Content management (CMS)WordPress
technotln.ee
MXGoogle Workspace
NSZone.ee
REGZone Media OÜ
SRCEIS WHOIS
Could not analyse (fetch failed)
xn--kosaar-bua.ee
NSZone.ee
REGZone Media OÜ
SRCEIS WHOIS
Detected technologies
OtherOpen Graph · Schema.org
JavaScript libraryjQuery
AnalyticsGoogle Analytics
Tag managerGoogle Tag Manager
Web serverApache
Mobile carrier
+372 7383051Telia Eesti AS
Widgets14JavaScript libraries10CDN5Mobile technologies4Analytics4Programming language4Email server3Linked services3Mapping2SSL certificate2Ads1CDN1RSS / feeds1Web server1Content management (CMS)1Frameworks1Hosting1Web Master1Ns1Payment system1
Category breakdown
Widgets (14)
WordPress Plugins · Translation · Localization Software · SEO Management · Content Modification · Site Search · Search API · Semantic Search · Content Optimization · Website Performance · Tag Management · Link Management · Content Management System · Marketing Automation · Data Management Platform · Digital Experience Optimization · Privacy Compliance · Data Protection · Compliance Software · API Management · Feedback Forms and Surveys · Form Management
JavaScript libraries (10)
Animation · JavaScript Library · Performance Optimization · Polyfill · DOM Manipulation · Event Handling · Ajax Library · Resource Loader · Compatibility · Browser Feature Detection · Responsive Design Utility
CDN (5)
–
Mobile technologies (4)
–
Analytics (4)
Audience Measurement · Tag Management · Conversion Tracking · Advertiser Tracking · Social Management · Conversion Optimization
Programming language (4)
–
Email server (3)
Secure Email · DMARC
Linked services (3)
AI
KÄOSAAR & CO
1 class · figurative-word · 02.06.1993 · 9305124
Expired
26k €
Tallinna Tehnikaülikool
74000323
9
9k €
Tallinna Tehnoloogiakolledž
70003767
3
7k €
Tartu Linnavalitsus
75006546
5
4k €
Eesti Rahvakultuuri Keskus
70001024
2
3k €
SA Tartu Ülikooli Kliinikum
90001478
4
2k €
Lääneranna Vallavalitsus
77000298
3
2k €

Top 7 buyers account for 53k € — 96% of total. The remaining 3 buyers split the rest.

20265 transactions · 3k €
31.032026
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
615 €
16.032026
Tallinna Tehnoloogiakolledž70003767
MAJANDAMISKULUD · Kutseharidus
502 €
13.032026
SA Tartu Ülikooli Kliinikum90001478
MAJANDAMISKULUD · Üldhaigla teenused
670 €
13.032026
Ida-Tallinna Keskhaigla AS10822068
MAJANDAMISKULUD · Üldhaigla teenused
443 €
13.032026
Rahvusooper Estonia74000033
MAJANDAMISKULUD · Teatrid
393 €
Show remaining 42 transactions+
20266 transactions · 6k €
27.022026
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
1054 €
13.022026
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
410 €
05.022026
Tartu Ülikool74001073
2×
expand ›
hide ⌃
  • Ä 20000855 / 21 · Olek: Jõustunud
  • Kanne nr 20 · kanne
12.03.2026OfficerAstus juhatusse— Kristiina Aasna
12.03.2026FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 20000855 / 20 · Olek: Jõustunud
  • Kanne nr 19 · kanne
2025
09.06.2025OfficerSai osanikuks— Kalev Käosaar · · 34 %
09.06.2025FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 20000855 / 19 · Olek: Jõustunud
  • Kanne nr 18 · kanne
20.05.2025FilingMuutmiskanne— Ä 20000855 / 18 · Olek: Jõustunud
20.05.2025FilingOsanike muutmine— Ä 20000855 / M8 · Olek: Jõustunud
20.05.2025FilingMuutmiskanne— Kanne nr 17 · kanne
29.04.2025ReportEsitati 2024. aasta aruanne— Käive 1 056 091 €
25.04.2025FilingOsanike muutmine— Ä 20000855 / M7 · Olek: Jõustunud
08.04.2025OfficerSai osanikuks— Kristiina Aasna · · 10 %
08.04.2025FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 20000855 / 17 · Olek: Jõustunud
  • Kanne nr 16 · kanne
28.03.2025FilingOsanike muutmine— Ä 20000855 / M6 · Olek: Jõustunud
2024
17.10.2024FilingOsanike muutmine— Ä 20000855 / 16 · Olek: Jõustunud
09.09.2024OfficerSai osanikuks— Adrien Hanouar Renaudo · · 5 %
09.09.2024FilingMuutmiskanne— Ä 20000855 / 15 · Olek: Jõustunud
09.09.2024FilingOsanike muutmine— Ä 20000855 / M5 · Olek: Jõustunud
09.09.2024FilingMuutmiskanne— Kanne nr 15 · kanne
10
Kristiina Aasna1
Adrien Hanouar Renaudo1
Aivo Arula1
KK
Kalev Käosaar
board member, shareholder 34%, ultimate beneficial owner
10 other companies›
CompanyRoleReg. code
Kolmvara OÜ
Board memberFounderUltimate beneficial ownerShareholder 33%
11498256
Patendivolinike Koda
Legal representative of the institution
77000826
PEPPERMINT Ventures and IP (EE Holding) OÜ
Ultimate beneficial ownerBoard member
16040438
peppermint.one OÜ
Ultimate beneficial ownerBoard member
16520701
peppermint.services OÜ
Ultimate beneficial ownerBoard member
16704231
Purtse Pruulikoda OÜ
Board memberUltimate beneficial ownerFounder
12856870
Seven Est OÜ
Board memberUltimate beneficial ownerShareholder 100%Founder
12157646
Tallinn, Suur-Patarei tn 2 korteriühistu
Board member
80500863
Windrox Grupp OÜ
Supervisory board member
11966473
Windrox Kapital OÜ
Supervisory board member
11374888
KA
Kristiina Aasna
board member, shareholder 10%
1 other company›
CompanyRoleReg. code
KVeeb OÜ
LiquidatorFounderUltimate beneficial ownerShareholder 50%
14423847
AH
Adrien Hanouar Renaudo
shareholder 5%
1 other company›
CompanyRoleReg. code
Ploomi Consult OÜ
Board memberUltimate beneficial ownerShareholder 50%Founder
16614550
AA
Aivo Arula
shareholder 10%
1 other company›
CompanyRoleReg. code
Tartu linn, Haraka tn 1 korteriühistu
Board member
80270788
Mapping (2)
Maps
SSL certificate (2)
Root Authority
Ads (1)
Ad Server · Ad Network · Ad Analytics · Demand-side Platform · Ad Exchange
CDN (1)
–
RSS / feeds (1)
–
Web server (1)
–
Content management (CMS) (1)
Open Source · Blog · Simple Website Builder · Community CMS · eCommerce Enabled
Frameworks (1)
Schema
Hosting (1)
Server Location
Web Master (1)
–
Ns (1)
–
Payment system (1)
Currency
MAJANDAMISKULUD · Kolmanda taseme haridus
124 €
20.012026
SA Tartu Ärinõuandla90013897
MAJANDAMISKULUD · Üldine majandus- ja kaubanduspoliitika
624 €
16.012026
Tartu Linnavalitsus75006546
MAJANDAMISKULUD · Muud üldised valitsussektori teenused
731 €
14.012026
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
3184 €
202517 transactions · 25k €
18.122025
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
393 €
27.112025
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
397 €
21.112025
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
992 €
14.112025
Tartu Linnavalitsus75006546
MAJANDAMISKULUD · Muud üldised valitsussektori teenused
372 €
15.092025
Tallinna Tehnoloogiakolledž70003767
MAJANDAMISKULUD · Kutseharidus
4236 €
08.092025
Tallinna Tehnoloogiakolledž70003767
MAJANDAMISKULUD · Kutseharidus
2182 €
08.092025
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
1670 €
27.062025
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
848 €
28.052025
Tartu Linnavalitsus75006546
MAJANDAMISKULUD · Muud üldised valitsussektori teenused
903 €
15.042025
MTÜ Tartu Üliõpilasmaja80087452
MAJANDAMISKULUD · Vaba aja üritused
122 €
28.032025
Tartu Linnavalitsus75006546
MAJANDAMISKULUD · Muu vaba aeg, kultuur, religioon, sh haldus
366 €
21.032025
SA Tartu Ülikooli Kliinikum90001478
MAJANDAMISKULUD · Üldhaigla teenused
659 €
17.032025
Eesti Rahvakultuuri Keskus70001024
MAJANDAMISKULUD · Rahvakultuur
293 €
07.032025
Tallinna Tehnikaülikool74000323
MAJANDAMISKULUD · Teadus- ja arendustegevus hariduses
1708 €
07.032025
Tallinna Tehnikaülikool74000323
MUUD TEGEVUSKULUD · Teadus- ja arendustegevus hariduses
225 €
21.022025
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
1623 €
06.022025
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
7913 €
202419 transactions · 22k €
10.122024
MTÜ Tartu Üliõpilasmaja80087452
MAJANDAMISKULUD · Vaba aja üritused
450 €
06.122024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
1159 €
22.112024
Tartu Linnavalitsus75006546
MAJANDAMISKULUD · Muu vaba aeg, kultuur, religioon, sh haldus
1806 €
01.112024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
6649 €
30.102024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
2745 €
10.102024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
979 €
04.102024
Lääneranna Vallavalitsus77000298
PÕHIVARA · Vaba aja üritused
1045 €
18.092024
Eesti Rahvakultuuri Keskus70001024
MAJANDAMISKULUD · Rahvakultuur
2347 €
13.092024
Lääneranna Vallavalitsus77000298
MAJANDAMISKULUD · Valla- ja linnavalitsus
130 €
30.082024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
147 €
22.072024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
154 €
06.062024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
165 €
12.042024
SA Tartu Ülikooli Kliinikum90001478
MAJANDAMISKULUD · Üldhaigla teenused
439 €
08.042024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
769 €
27.032024
SA Tartu Ülikooli Kliinikum90001478
MAJANDAMISKULUD · Üldhaigla teenused
659 €
15.032024
Lääneranna Vallavalitsus77000298
MAJANDAMISKULUD · Valla- ja linnavalitsus
404 €
14.032024
Tartu Linnatransport77000967
MAJANDAMISKULUD · Ühistranspordi korraldus
244 €
21.022024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
1078 €
10.012024
Tartu Ülikool74001073
MAJANDAMISKULUD · Kolmanda taseme haridus
439 €