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Trackers› Clinical trials› Seoul
Clinical trial register · South Korea

Clinical Trials in Seoul, 2026

Every study on the ClinicalTrials.gov registry that lists a site in South Korea and is open, about to open, active-but-closed, or enrolling by invitation. Filter it, cite it, and take it away as a file.

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Source: ClinicalTrials.gov, U.S. National Library of Medicine. Complete coverage — all 3365 matching records held by the registry are in this view. Synced 11 Oct 2026, 03:17 UTC
3365
Studies in scope
all four open statuses
1831
Recruiting now
open to new participants
500
Lead sponsors
across recruiting studies
Top sites
Seoul 71 Seongnam-si 24 Daegu 23 Gyeonggi-do 23 Goyang-si 19
Narrow the registerReset
Recruitment status
Phase
Lead sponsor
AstraZeneca195 Seoul National University Hospital183 Yonsei University143 Samsung Medical Center142 Merck Sharp & Dohme LLC111 Clear sponsor filter
Site location
Seoul71 Seongnam-si24 Daegu23 Gyeonggi-do23 Goyang-si19
All 29 locations
Target enrolment
to

Trials with a site in Seoul

71 of 3365 studies
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Status
Study
Lead sponsor
Phase
Enrol
Sites in South Korea
Start
Recruiting
Hoffmann-La Roche
Phase 3
380
Jeollanam-do, Seoul
2026-06-23
Recruiting
Hoffmann-La Roche
Phase 2/3
650
Seongnam-si, Daegu, Goyang-si, Gyeonggi-do, Seoul
2026-05-21
Recruiting
Hoffmann-La Roche
Phase 2
80
Dongnam-gu, Cheonan-si, Namdong-Gu, Seongnam-si, Seoul
2026-04-07
Recruiting
Hoffmann-La Roche
Phase 3
1,600
Seongnam-si, Daejeon, Gangwon-do, Gwangju, Gyeonggi-do, Seoul
2026-03-23
Recruiting
Hoffmann-La Roche
Phase 3
2,000
Daegu, Seongnam-si, Daejeon, Gwangju, Gyeonggi-do, Incheon, Seoul
2026-03-16
Recruiting
Hoffmann-La Roche
Phase 2
100
Seongnam-si, Seoul
2026-03-11
Recruiting
Hoffmann-La Roche
Phase 3
250
Daegu, Gyeonggi-do, Seoul
2025-11-27
Recruiting
Hoffmann-La Roche
Phase 3
900
Seoul
2025-11-24
Active, closed
Hoffmann-La Roche
Phase 3
1,060
Busan, Gwangju, Gyeonggi-do, Incheon, Seongnam-si, Seoul
2025-11-12
Recruiting
Hoffmann-La Roche
Phase 3
600
Busan, Cheongju-si, Daegu, Seoul
2025-10-24
Recruiting
Hoffmann-La Roche
Phase 2
120
Seoul
2025-09-09
Recruiting
Hoffmann-La Roche
Phase 3
80,000
Gwangju, Gyeonggi-do, Incheon, Namdong-gu, Seongnam-si, Seoul, Suwon
2025-07-02
Recruiting
Hoffmann-La Roche
Phase 3
425
Ansan-si, Daegu, Gwangju, Seoul
2025-05-12
Recruiting
Hoffmann-La Roche
Phase 3
450
Daegu, Dongnam-gu, Cheonan-si, Goyang-si, Seongnam-si, Seoul
2025-04-09
Recruiting
Hoffmann-La Roche
Phase 3
600
Busan, Daegu, Daejeon, Gangwon-do, Guri-si, Seoul
2025-03-17
Active, closed
Hoffmann-La Roche
Phase 4
274
Busan, Daegu, Seongnam-si, Seoul
2025-03-14
Recruiting
Hoffmann-La Roche
Phase 2
130
Seongnam-si, Seoul
2025-03-05
Active, closed
Hoffmann-La Roche
Phase 2
62
Seongnam-si, Seoul
2024-12-09
Active, closed
Hoffmann-La Roche
Phase 3
338
Gyeonggi-do, Incheon, Jeollanam-do, Seongnam-si, Seoul
2024-09-23
Active, closed
Hoffmann-La Roche
Phase 1
30
Seoul
2023-12-11
Active, closed
Hoffmann-La Roche
Phase 3
1,050
Daegu, Seongnam-si, Seoul, Ulsan
2023-12-11
Recruiting
Hoffmann-La Roche
Phase 1/2
200
Seoul
2023-11-14
Recruiting
Hoffmann-La Roche
Phase 3
182
Daejeon, Seoul
2023-10-22
Active, closed
Hoffmann-La Roche
Phase 3
1,130
Busan, Daegu, Daejeon, Goyang-si, Jeollanam-do, Seoul
2023-09-18
Active, closed
Hoffmann-La Roche
Phase 3
687
Goyang-si, Gyeonggi-do, Jeollanam-do, Seoul, Ulsan
2023-09-14
Recruiting
Hoffmann-La Roche
Phase 3
230
Goyang-si, Seoul
2023-09-08
Active, closed
Hoffmann-La Roche
Phase 3
459
Anyang-si, Bucheon-si, Cheongju-si, Gyeonggi-do, Seongnam-si, Seoul
2023-08-08
Active, closed
Hoffmann-La Roche
Phase 2
83
Seoul
2023-07-18
Active, closed
Hoffmann-La Roche
Phase 3
2,000
Bucheon-si, Daegu, Gyeonggi-do, Incheon, Jeollabuk-do, Seoul, Wŏnju
2023-06-28
Recruiting
Hoffmann-La Roche
Phase 1/2
320
Busan, Seoul
2023-06-20
Recruiting
Hoffmann-La Roche
Phase 3
420
Daegu, Goyang-si, Gyeonggi-do, Incheon, Seoul
2023-06-07
Recruiting
Hoffmann-La Roche
Phase 3
100
Goyang-si, Gyeonggi-do, Seongnam-si, Seoul
2023-06-01
Active, closed
Hoffmann-La Roche
Phase 2
199
Goyang-si, Jeollanam-do, Seoul
2023-04-21
Active, closed
Hoffmann-La Roche
Phase 2
204
Gyeonggi-do, Incheon, Seoul
2023-04-13
Active, closed
Hoffmann-La Roche
Phase 3
1,290
Bucheon-si, Daegu, Gyeonggi-do, Seoul, Wŏnju
2022-12-29
Recruiting
Hoffmann-La Roche
Phase 1/2
65
Seoul
2022-11-16
Active, closed
Hoffmann-La Roche
Phase 3
68
Daegu, Gyeongsangnam-do, Jeollanam-do, Seongnam-si, Seoul
2022-11-01
Active, closed
Hoffmann-La Roche
Phase 3
122
Seoul
2022-09-27
Active, closed
Hoffmann-La Roche
Phase 3
132
Goyang-si, Seoul
2022-08-30
Active, closed
Hoffmann-La Roche
Phase 3
922
Daegu, Goyang-si, Seoul
2022-07-18
Active, closed
Hoffmann-La Roche
Phase 3
208
Busan, Daejeon, Seoul
2022-04-25
Recruiting
Hoffmann-La Roche
Phase 1
332
Seoul
2022-03-07
Active, closed
Hoffmann-La Roche
Phase 3
660
Cheongju-si, Daegu, Gyeongsangnam-do, Seongnam-si, Seoul, Ulsan
2021-11-18
Active, closed
Hoffmann-La Roche
Phase 3
478
Busan, Seongnam-si, Seoul
2021-10-27
Recruiting
Hoffmann-La Roche
Phase 1
542
Goyang-si, Jeollanam-do, Seongnam-si, Seoul
2021-10-22
Active, closed
Hoffmann-La Roche
Phase 2
176
Seoul
2021-10-07
Active, closed
Hoffmann-La Roche
Phase 1/2
42
Seoul
2021-09-14
Active, closed
Hoffmann-La Roche
Phase 3
451
Busan, Daegu, Incheon, Seongnam-si, Seoul
2021-07-14
Recruiting
Hoffmann-La Roche
Phase 1/2
316
Goyang-si, Seoul
2021-06-22
Active, closed
Hoffmann-La Roche
Phase 3
1,188
Daegu, Goyang-si, Seongnam-si, Seoul
2021-05-04
Active, closed
Hoffmann-La Roche
Phase 3
761
Goyang-si, Seoul
2021-05-03
Active, closed
Hoffmann-La Roche
Phase 3
557
Goyang-si, Gyeonggi-do, Seoul
2021-04-26
Active, closed
Hoffmann-La Roche
Phase 3
751
Daegu, Goyang-si, Seoul
2021-03-24
Active, closed
Hoffmann-La Roche
Phase 1/2
241
Incheon, Seoul
2021-03-15
Active, closed
Hoffmann-La Roche
Phase 3
270
Busan, Goyang-si, Seongnam-si, Seoul
2021-02-23
Active, closed
Hoffmann-La Roche
Phase 2
920
Gyeonggi-do, Seoul
2021-01-18
Active, closed
Hoffmann-La Roche
Phase 2
303
Dongnam-gu, Cheonan-si, Goyang-si, Seoul
2020-11-27
Active, closed
Hoffmann-La Roche
Phase 1/2
518
Gyeonggi-do, Seoul
2020-11-01
Active, closed
Hoffmann-La Roche
Phase 3
992
Cheongju-si, Daegu, Gyeonggi-do, Incheon, Seoul, Ulsan
2020-10-09
Active, closed
Hoffmann-La Roche
Phase 3
210
Seoul
2020-10-08
Active, closed
Hoffmann-La Roche
Phase 3
190
Seoul, Ulsan
2020-09-30
Active, closed
Hoffmann-La Roche
Phase 2/3
325
Busan, Daegu, Gyeonggi-do, Seoul
2020-01-29
Active, closed
Dose Escalation Study of a PD1-LAG3 Bispecific Antibody in Patients With Advanced and/or Metastatic Solid Tumors
NCT04140500Solid Tumors, Metastatic Melanoma, Non-small Cell Lung Cancer, Esophageal Squamous Cell Carcinoma
DrugTobemstomig
Hoffmann-La Roche
Phase 1/2
170
Seongnam-si, Seoul
2019-11-11
Active, closed
Hoffmann-La Roche
Phase 1/2
498
Busan, Seoul
2019-08-13
Active, closed
Hoffmann-La Roche
Phase 3
1,000
Seoul
2019-02-28
Active, closed
Hoffmann-La Roche
Phase 3
257
Gyeonggi-do, Incheon, Jeollanam-do, Seoul
2018-08-16
Recruiting
Hoffmann-La Roche
Phase 1/2
1,132
Goyang-si, Seoul
2018-03-30
Active, closed
Hoffmann-La Roche
Phase 2/3
1,000
Gyeonggi-do, Jeollanam-do, Seoul
2017-09-22
Active, closed
Hoffmann-La Roche
Phase 3
382
Gyeonggi-do, Jeollanam-do, Seoul
2017-09-20
Active, closed
Hoffmann-La Roche
Phase 2
534
Seoul
2015-11-19
Active, closed
Hoffmann-La Roche
Phase 3
154
Seoul
2015-02-02
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Cite this view

Priya Life Science (2026). Clinical trial register: studies with a South Korean investigative site, filtered. Derived from ClinicalTrials.gov. Retrieved 11 October 2026. https://priyalifescience.com/clinical-trials-south-korea/city/seoul

Query this register directly
GET /api/trials?country=in&status=recruiting&format=json Try it now →

About this register

This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every study on the registry that lists at least one investigative site in South Korea and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 3,365 studies in total at the last sync on 11 Oct 2026, 03:17 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.

This page shows the 71 of those studies with a site in Seoul that also match the filters currently applied.

How many clinical trials are recruiting in Seoul?

26 of the 71 studies on this page are recruiting new participants as of the 11 Oct 2026, 03:17 UTC sync. A further 0 have not yet opened recruitment, 45 are active but closed to new participants, and 0 are enrolling by invitation only. Eligibility for any study is decided by its study team.

Summary by phase

Studies by phase (Seoul), 71 studies
PhaseStudiesRecruitingShare
Phase 3421459.2%
Phase 212416.9%
Phase 1/210514.1%
Phase 1324.2%
Phase 2/3314.2%
Phase 4101.4%

Most active sponsors

Lead sponsors with the most studies (Seoul)
Lead sponsorStudiesRecruiting
Hoffmann-La Roche7126
Listing here is informational and not medical advice; eligibility is determined by each study team. See also the Ireland, UK, EU, USA and China registers.