SOUTH KOREA · OPENDART
SAMSUNG SDS CO., LTD.
삼성에스디에스 · 018260 · KOSPI · Technology · Information Technology Services
Score
90.8
Insider timeline
40 insiders bought within 15 days, 23 Jun to 7 Jul: 40 Executive. 4 of them bought again later. 4 more bought afterwards. The share closed at 191,600.00 on the first of those days and at 199,900.00 most recently (+4.3%).
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
▮Purple band: several insiders bought within 15 days
The band marks the stretch with the most different buyers: at most 15 days long and at least two people. Here it is 23 Jun – 7 Jul, with 40 insiders. Only the strongest stretch is marked. Several people deciding the same thing is harder to explain by one person's private reasons, but insiders often buy together just after a closed period ends, so compare it with the grey weekly bars.
Blue line: this share's price, +10.9% over these six months
The closing price of each day, from 180,200.00 on 2026-04-21 to 199,900.00 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.
Dashed line: the typical stock on the same exchange, −20.4%
Taken from the 685 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share +10.9%, the typical one −20.4%, 31.3 points ahead. It is not an index and not a comparison within one industry.
36 more insiders traded in the window and are not drawn.
This company: insiders buying per month, last 12 months
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since |
|---|---|---|---|---|---|---|
| GUM KI HO | Executive | 1 | — | 86.8M KRW | 2026-04-23 | +12.1% |
| Lee Jun-hui | Executive | 1 | — | 17.9M KRW | 2026-04-23 | +12.1% |
| LEE HOJOON | Executive | 3 | — | 164.0M KRW | 2026-04-24 | +17.7% |
| Kim Min | Executive | 3 | — | 54.2M KRW | 2026-05-20 | +21.3% |
| Min Dae-hong | Executive | 5 | — | 65.4M KRW | 2026-05-20 | +21.3% |
| Soonmin Bae | Executive | 3 | — | 49.8M KRW | 2026-06-15 | −16.5% |
| Kaeyoung Shin | Executive | 2 | — | 41.7M KRW | 2026-06-16 | −16.0% |
| Park sok hwan | Executive | 2 | — | 29.4M KRW | 2026-06-23 | +4.3% |
| Han Ho-jeon | Executive | 1 | — | 19.1M KRW | 2026-06-25 | +4.9% |
| Kim Jeong-uk | Executive | 2 | — | 37.2M KRW | 2026-06-25 | +4.9% |
| Lee Tae-hui | Executive | 1 | — | 98.7M KRW | 2026-06-25 | +4.9% |
| Ahn Dae-jung | Executive | 1 | — | 44.8M KRW | 2026-06-26 | +5.3% |
| Choi Gyu-hwang | Executive | 1 | — | 20.4M KRW | 2026-06-26 | +5.3% |
| Han Sang-won | Executive | 1 | — | 21.3M KRW | 2026-06-26 | +5.3% |
| Jupyung Lee | Executive | 1 | — | 22.0M KRW | 2026-06-26 | +5.3% |
| Kim Beom-su | Executive | 1 | — | 19.9M KRW | 2026-06-26 | +5.3% |
| Kim Chang-min | Executive | 2 | — | 77.8M KRW | 2026-06-26 | +5.3% |
| Kim Eun-yeong | Executive | 2 | — | 140.6M KRW | 2026-06-26 | +5.3% |
| Kim Hak-gil | Executive | 1 | — | 95.0M KRW | 2026-06-26 | +5.3% |
| Kim Seong-gon | Executive | 1 | — | 18.4M KRW | 2026-06-26 | +5.3% |
| Kim Seung-gi | Executive | 1 | — | 19.1M KRW | 2026-06-26 | +5.3% |
| Moon Sin-jeong | Executive | 1 | — | 19.2M KRW | 2026-06-26 | +5.3% |
| Park In-seok | Executive | 1 | — | 38.7M KRW | 2026-06-26 | +5.3% |
| Shin Chang-min | Executive | 2 | — | 19.2M KRW | 2026-06-26 | +5.3% |
| Baek Chang-hyeon | Executive | 1 | — | 19.3M KRW | 2026-06-29 | +0.6% |
| Hong Seong-cheon | Executive | 1 | — | 30.6M KRW | 2026-06-29 | +0.6% |
| Kim Jong-pil | Executive | 1 | — | 98.7M KRW | 2026-06-29 | +0.6% |
| Kim Sang-yong | Executive | 1 | — | 100.5M KRW | 2026-06-29 | +0.6% |
| Kim Tae-ho | Executive | 1 | — | 99.5M KRW | 2026-06-29 | +0.6% |
| Kim, Hyun sung | Executive | 1 | — | 38.5M KRW | 2026-06-29 | +0.6% |
| Lee Dong-seop | Executive | 1 | — | 19.0M KRW | 2026-06-29 | +0.6% |
| Seo Jin-u | Executive | 1 | — | 9.9M KRW | 2026-06-29 | +0.6% |
| Hong Gi-yeong | Executive | 1 | — | 22.9M KRW | 2026-06-30 | +4.8% |
| Kim Geung-hwan | Executive | 1 | — | 19.3M KRW | 2026-06-30 | +4.8% |
| Kim Seung-jin | Executive | 1 | — | 19.1M KRW | 2026-06-30 | +4.8% |
| Moon Gwan-hwi | Executive | 1 | — | 23.3M KRW | 2026-06-30 | +4.8% |
| Noh Hyeon | Executive | 1 | — | 19.5M KRW | 2026-06-30 | +4.8% |
| Hwang Su-yeong | Executive | 1 | — | 47.7M KRW | 2026-07-01 | +1.3% |
| Park Il-u | Executive | 1 | — | 48.9M KRW | 2026-07-01 | +1.3% |
| CHANG YONG MIN | Executive | 1 | — | 22.8M KRW | 2026-07-02 | −0.8% |
| Noh Gwang-bin | Executive | 1 | — | 19.6M KRW | 2026-07-03 | +2.3% |
| Yeo Hyeong-min | Executive | 1 | — | 95.0M KRW | 2026-07-03 | +2.3% |
| Choi Gyu-man | Executive | 1 | — | 39.5M KRW | 2026-07-13 | +5.1% |
| Yoon Min-sik | Executive | 1 | — | 2.0bn KRW | 2026-07-13 | +5.1% |
| Jung Yeong-hun | Executive | 3 | — | 37.4M KRW | 2026-07-15 | +0.3% |
| Lee Gwan-hui | Executive | 1 | — | 18.6M KRW | 2026-07-20 | +7.6% |
Insiders' buying price vs the latest close
Insiders paid 189,373.45 KRW a share on average (78 purchase lines, 50 buyers, 2025-10-23 – 2026-08-21). The close on 2026-10-16 was 5.6% above that price.
The latest purchase (2026-08-21) was at 225,000.00 KRW; the close was 11.2% below that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored. 1 more purchase line could not be compared with the share price and is left out.
Insider trades on the exchange
Purchases and sales on the exchange in the last 12 months. The filing gives the settlement date; the trade date is two trading days earlier.
| Trade date | Insider | Role | Trade | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-21 | Soonmin Bae | Managing director | Bought on the exchange | 100 | ₩225,000 | ₩22.5M | DART ↗ |
| 2026-07-21 | Min Dae-hong | Managing director | Bought on the exchange | 10 | ₩183,500 | ₩1.8M | DART ↗ |
| 2026-07-21 | Jung Yeong-hun | Managing director | Bought on the exchange | 30 | ₩189,100 | ₩5.7M | DART ↗ |
| 2026-07-20 | Lee Gwan-hui | Managing director | Bought on the exchange | 100 | ₩186,500 | ₩18.6M | DART ↗ |
| 2026-07-20 | Min Dae-hong | Managing director | Bought on the exchange | 50 | ₩186,000 | ₩9.3M | DART ↗ |
| 2026-07-20 | Jung Yeong-hun | Managing director | Bought on the exchange | 64 | ₩185,500 | ₩11.9M | DART ↗ |
| 2026-07-20 | Kim Min | Managing director | Bought on the exchange | 100 | ₩186,900 | ₩18.7M | DART ↗ |
| 2026-07-15 | Jung Yeong-hun | Managing director | Bought on the exchange | 100 | ₩198,510 | ₩19.9M | DART ↗ |
| 2026-07-13 | Kim Chang-min | Managing director | Bought on the exchange | 200 | ₩194,500 | ₩38.9M | DART ↗ |
| 2026-07-13 | Choi Gyu-man | Managing director | Bought on the exchange | 200 | ₩197,500 | ₩39.5M | DART ↗ |
| 2026-07-13 | Yoon Min-sik | Managing director | Bought on the exchange | 100 | ₩19,700,000 | ₩2.0B | DART ↗ |
| 2026-07-09 | Min Dae-hong | Managing director | Bought on the exchange | 101 | ₩187,249 | ₩18.9M | DART ↗ |
| 2026-07-07 | Kaeyoung Shin | Vice president | Bought on the exchange | 111 | ₩188,000 | ₩20.9M | DART ↗ |
| 2026-07-03 | Noh Gwang-bin | Managing director | Bought on the exchange | 100 | ₩195,800 | ₩19.6M | DART ↗ |
| 2026-07-03 | Yeo Hyeong-min | Vice president | Bought on the exchange | 500 | ₩190,000 | ₩95.0M | DART ↗ |
| 2026-07-02 | CHANG YONG MIN | Managing director | Bought on the exchange | 111 | ₩205,500 | ₩22.8M | DART ↗ |
| 2026-07-01 | Hwang Su-yeong | Vice president | Bought on the exchange | 250 | ₩190,800 | ₩47.7M | DART ↗ |
| 2026-07-01 | Park Il-u | Managing director | Bought on the exchange | 250 | ₩195,500 | ₩48.9M | DART ↗ |
| 2026-07-01 | Kim Eun-yeong | Vice president | Bought on the exchange | 200 | ₩191,500 | ₩38.3M | DART ↗ |
| 2026-06-30 | Kim Seung-jin | Managing director | Bought on the exchange | 100 | ₩191,304 | ₩19.1M | DART ↗ |
| 2026-06-30 | Hong Gi-yeong | Managing director | Bought on the exchange | 120 | ₩191,200 | ₩22.9M | DART ↗ |
| 2026-06-30 | Soonmin Bae | Managing director | Bought on the exchange | 100 | ₩190,000 | ₩19.0M | DART ↗ |
| 2026-06-30 | Noh Hyeon | Managing director | Bought on the exchange | 101 | ₩193,500 | ₩19.5M | DART ↗ |
| 2026-06-30 | Kim Geung-hwan | Managing director | Bought on the exchange | 100 | ₩192,900 | ₩19.3M | DART ↗ |
| 2026-06-30 | Moon Gwan-hwi | Managing director | Bought on the exchange | 120 | ₩194,053 | ₩23.3M | DART ↗ |
| 2026-06-29 | Baek Chang-hyeon | Managing director | Bought on the exchange | 100 | ₩193,300 | ₩19.3M | DART ↗ |
| 2026-06-29 | Seo Jin-u | Managing director | Bought on the exchange | 50 | ₩197,600 | ₩9.9M | DART ↗ |
| 2026-06-29 | Kim, Hyun sung | Managing director | Bought on the exchange | 200 | ₩192,500 | ₩38.5M | DART ↗ |
| 2026-06-29 | Kim Tae-ho | Vice president | Bought on the exchange | 520 | ₩191,299 | ₩99.5M | DART ↗ |
| 2026-06-29 | Lee Dong-seop | Managing director | Bought on the exchange | 100 | ₩190,000 | ₩19.0M | DART ↗ |
| 2026-06-29 | Kim Sang-yong | Vice president | Bought on the exchange | 520 | ₩193,254 | ₩100.5M | DART ↗ |
| 2026-06-29 | Kim Jong-pil | Vice president | Bought on the exchange | 500 | ₩197,400 | ₩98.7M | DART ↗ |
| 2026-06-29 | Hong Seong-cheon | Managing director | Bought on the exchange | 160 | ₩191,500 | ₩30.6M | DART ↗ |
| 2026-06-29 | LEE HOJOON | Vice president | Bought on the exchange | 318 | ₩194,398 | ₩61.8M | DART ↗ |
| 2026-06-29 | Shin Chang-min | Managing director | Bought on the exchange | 45 | ₩192,998 | ₩8.7M | DART ↗ |
| 2026-06-26 | Ahn Dae-jung | Vice president | Bought on the exchange | 100 | ₩192,500 | ₩19.2M | DART ↗ |
| 2026-06-26 | Ahn Dae-jung | Vice president | Bought on the exchange | 100 | ₩198,000 | ₩19.8M | DART ↗ |
| 2026-06-26 | Ahn Dae-jung | Vice president | Bought on the exchange | 31 | ₩186,000 | ₩5.8M | DART ↗ |
| 2026-06-26 | Park In-seok | Managing director | Bought on the exchange | 100 | ₩192,875 | ₩19.3M | DART ↗ |
| 2026-06-26 | Park In-seok | Managing director | Bought on the exchange | 100 | ₩193,900 | ₩19.4M | DART ↗ |
| 2026-06-26 | Kim Eun-yeong | Vice president | Bought on the exchange | 500 | ₩204,500 | ₩102.2M | DART ↗ |
| 2026-06-26 | Moon Sin-jeong | Managing director | Bought on the exchange | 100 | ₩191,900 | ₩19.2M | DART ↗ |
| 2026-06-26 | Kim Beom-su | Vice president | Bought on the exchange | 100 | ₩198,900 | ₩19.9M | DART ↗ |
| 2026-06-26 | LEE HOJOON | Vice president | Bought on the exchange | 237 | ₩190,000 | ₩45.0M | DART ↗ |
| 2026-06-26 | Jupyung Lee | Managing director | Bought on the exchange | 111 | ₩198,000 | ₩22.0M | DART ↗ |
| 2026-06-26 | Kim Jeong-uk | Vice president | Bought on the exchange | 150 | ₩184,500 | ₩27.7M | DART ↗ |
| 2026-06-26 | Kim Seung-gi | Managing director | Bought on the exchange | 100 | ₩190,900 | ₩19.1M | DART ↗ |
| 2026-06-26 | Shin Chang-min | Managing director | Bought on the exchange | 55 | ₩190,300 | ₩10.5M | DART ↗ |
| 2026-06-26 | Choi Gyu-hwang | Managing director | Bought on the exchange | 100 | ₩204,000 | ₩20.4M | DART ↗ |
| 2026-06-26 | Kim Chang-min | Managing director | Bought on the exchange | 200 | ₩194,607 | ₩38.9M | DART ↗ |
| 2026-06-26 | Han Sang-won | Managing director | Bought on the exchange | 111 | ₩192,100 | ₩21.3M | DART ↗ |
| 2026-06-26 | Kim Seong-gon | Managing director | Bought on the exchange | 100 | ₩184,500 | ₩18.4M | DART ↗ |
| 2026-06-26 | Kim Hak-gil | Managing director | Bought on the exchange | 500 | ₩190,000 | ₩95.0M | DART ↗ |
| 2026-06-25 | Kim Jeong-uk | Vice president | Bought on the exchange | 50 | ₩189,800 | ₩9.5M | DART ↗ |
| 2026-06-25 | Han Ho-jeon | Managing director | Bought on the exchange | 100 | ₩190,500 | ₩19.1M | DART ↗ |
| 2026-06-25 | Lee Tae-hui | Vice president | Bought on the exchange | 500 | ₩197,348 | ₩98.7M | DART ↗ |
| 2026-06-24 | Park sok hwan | Managing director | Bought on the exchange | 37 | ₩187,865 | ₩7.0M | DART ↗ |
| 2026-06-24 | Kim Min | Managing director | Bought on the exchange | 100 | ₩191,300 | ₩19.1M | DART ↗ |
| 2026-06-23 | Park sok hwan | Managing director | Bought on the exchange | 114 | ₩197,228 | ₩22.5M | DART ↗ |
| 2026-06-23 | Min Dae-hong | Managing director | Bought on the exchange | 100 | ₩191,600 | ₩19.2M | DART ↗ |
| 2026-06-16 | Kaeyoung Shin | Vice president | Bought on the exchange | 111 | ₩188,000 | ₩20.9M | DART ↗ |
| 2026-06-15 | Soonmin Bae | Managing director | Bought on the exchange | 34 | ₩243,000 | ₩8.3M | DART ↗ |
| 2026-05-20 | Min Dae-hong | Managing director | Bought on the exchange | 100 | ₩161,900 | ₩16.2M | DART ↗ |
| 2026-05-20 | Kim Min | Managing director | Bought on the exchange | 100 | ₩164,000 | ₩16.4M | DART ↗ |
| 2026-04-24 | LEE HOJOON | Vice president | Bought on the exchange | 333 | ₩171,600 | ₩57.1M | DART ↗ |
| 2026-04-23 | Lee Jun-hui | President | Bought on the exchange | 100 | ₩178,600 | ₩17.9M | DART ↗ |
| 2026-04-23 | GUM KI HO | Vice president | Bought on the exchange | 500 | ₩173,500 | ₩86.8M | DART ↗ |
| 2026-02-26 | Lee Sang-uk | Vice president | Bought on the exchange | 25 | ₩190,000 | ₩4.8M | DART ↗ |
| 2026-02-05 | Lee Tae-hui | Vice president | Bought on the exchange | 255 | ₩171,466 | ₩43.7M | DART ↗ |
| 2026-02-04 | Lee Tae-hui | Vice president | Bought on the exchange | 45 | ₩171,500 | ₩7.7M | DART ↗ |
| 2026-01-23 | Lee Jun-hui | President | Bought on the exchange | 100 | ₩174,600 | ₩17.5M | DART ↗ |
| 2026-01-22 | Lee Jae-jin | Outside director | Bought on the exchange | 100 | ₩170,600 | ₩17.1M | DART ↗ |
| 2026-01-22 | YI, INSILL | Outside director | Bought on the exchange | 100 | ₩170,400 | ₩17.0M | DART ↗ |
| 2026-01-22 | MOON, MOOIL | Outside director | Bought on the exchange | 100 | ₩170,400 | ₩17.0M | DART ↗ |
| 2026-01-22 | SHIN, HYUNHAN | Outside director | Bought on the exchange | 100 | ₩170,400 | ₩17.0M | DART ↗ |
| 2025-10-23 | Lee Jae-jin | Outside director | Bought on the exchange | 100 | ₩165,000 | ₩16.5M | DART ↗ |
| 2025-10-23 | YI, INSILL | Outside director | Bought on the exchange | 100 | ₩165,200 | ₩16.5M | DART ↗ |
| 2025-10-23 | MOON, MOOIL | Outside director | Bought on the exchange | 100 | ₩166,100 | ₩16.6M | DART ↗ |
| 2025-10-23 | SHIN, HYUNHAN | Outside director | Bought on the exchange | 100 | ₩166,000 | ₩16.6M | DART ↗ |
Other changes in holdings · 25
Option exercises, grants, new shares, inheritance, gifts, off-exchange trades and trades by companies and funds. Not counted in the score.
| Date | Insider | Role | Reason | Shares | Filing |
|---|---|---|---|---|---|
| 2026-07-23 | Jung Yeong-hun | Managing director | Others(+) | 56 | DART ↗ |
| 2026-07-09 | Ahn Dae-jung | Vice president | Others(+) | 57 | DART ↗ |
| 2026-07-02 | Jung U-yong | Managing director | Others(+) | 98 | DART ↗ |
| 2026-07-01 | Kim Tae-ho | Vice president | Acquisition in exchange(+) | 520 | DART ↗ |
| 2026-06-18 | Kaeyoung Shin | Vice president | Acquisition in exchange(+) | 0 | DART ↗ |
| 2026-06-16 | Soonmin Bae | Managing director | New appointment(+) | 66 | DART ↗ |
| 2025-11-25 | Hong Gi-yeong | Managing director | New appointment(+) | 650 | DART ↗ |
| 2025-11-17 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 46,058 | DART ↗ |
| 2025-11-14 | National Pension Service | 10% shareholder | Acquisition in exchange(+) | 2,961 | DART ↗ |
| 2025-11-14 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 7,472 | DART ↗ |
| 2025-11-13 | National Pension Service | 10% shareholder | Acquisition in exchange(+) | 8,716 | DART ↗ |
| 2025-11-13 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 3,089 | DART ↗ |
| 2025-11-12 | National Pension Service | 10% shareholder | Acquisition in exchange(+) | 28,210 | DART ↗ |
| 2025-11-12 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 14,282 | DART ↗ |
| 2025-11-11 | National Pension Service | 10% shareholder | Acquisition in exchange(+) | 2,890 | DART ↗ |
| 2025-11-11 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 677 | DART ↗ |
| 2025-11-10 | National Pension Service | 10% shareholder | Acquisition in exchange(+) | 7,338 | DART ↗ |
| 2025-11-10 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 18,182 | DART ↗ |
| 2025-11-07 | National Pension Service | 10% shareholder | New report(+) | 7,728,206 | DART ↗ |
| 2025-11-07 | National Pension Service | 10% shareholder | New major shareholders(+) | 26,400 | DART ↗ |
| 2025-11-07 | National Pension Service | 10% shareholder | Disposal in exchange(-) | 71 | DART ↗ |
| 2024-12-06 | Noh Gwang-bin | Managing director | 기타(+) | 0 | DART ↗ |
| 2024-12-02 | Noh Gwang-bin | Managing director | 신규선임(+) | 21 | DART ↗ |
| 2024-12-02 | Lee Dong-seop | Managing director | 신규선임(+) | 284 | DART ↗ |
| 2024-12-02 | Lee Gwan-hui | Managing director | 신규선임(+) | 100 | DART ↗ |