SOUTH KOREA · OPENDART
SAMSUNG SDI CO.,LTD
삼성SDI · 006400 · KOSPI · Industrials · Electrical Equipment & Parts
Score
37.1
Insider timeline
One insider bought, once (13 Jul). The share closed at 440,000.00 that day and at 530,000.00 most recently (+20.5%).
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.
Blue line: this share's price, −17.8% over these six months
The closing price of each day, from 645,000.00 on 2026-04-21 to 530,000.00 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 −17.8%, the typical one −20.4%, 2.6 points ahead. It is not an index and not a comparison within one industry.
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 |
|---|---|---|---|---|---|---|
| Yunjae Kim | Executive | 1 | — | 800.0k KRW | 2026-07-13 | +20.5% |
Insiders' buying price vs the latest close
Insiders paid 346,295.44 KRW a share on average (3 purchase lines, 3 buyers, 2026-01-09 – 2026-07-13). The close on 2026-10-16 was 53.0% above that price.
The latest purchase (2026-07-13) was at 400,000.00 KRW; the close was 32.5% above that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.
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.
Other changes in holdings · 60
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 |
|---|---|---|---|---|---|
| 2026-08-21 | Yi Hyun Chang | Vice president | Others(+) | 679 | DART ↗ |
| 2026-07-20 | Jin Wook Kim | Managing director | Others(+) | 463 | DART ↗ |
| 2025-11-25 | Jae-Hong Choi | Managing director | New appointment(+) | 36 | DART ↗ |
| 2025-06-02 | Ha Youngki | Managing director | Others(-) | 36 | DART ↗ |
| 2025-06-02 | Ha Youngki | Managing director | Acquisition of paid-in new shares(+) | 41 | DART ↗ |
| 2025-06-02 | Chung Hoon | Managing director | Others(-) | 7 | DART ↗ |
| 2025-06-02 | MI HWA LIM | Managing director | Others(-) | 4 | DART ↗ |
| 2025-06-02 | MI HWA LIM | Managing director | Acquisition of paid-in new shares(+) | 4 | DART ↗ |
| 2025-06-02 | Lim Jong Hoon | Managing director | Others(-) | 4 | DART ↗ |
| 2025-06-02 | Lim Jong Hoon | Managing director | Acquisition of paid-in new shares(+) | 4 | DART ↗ |
| 2025-06-02 | Jin Woong LEE | Managing director | Others(-) | 4 | DART ↗ |
| 2025-06-02 | Jin Woong LEE | Managing director | Acquisition of paid-in new shares(+) | 4 | DART ↗ |
| 2025-06-02 | Chonghoon Lee | Managing director | Others(-) | 4 | DART ↗ |
| 2025-06-02 | Chonghoon Lee | Managing director | Acquisition of paid-in new shares(+) | 4 | DART ↗ |
| 2025-06-02 | LEE Seungjun | Managing director | Others(-) | 32 | DART ↗ |
| 2025-06-02 | LEE Seungjun | Managing director | Acquisition of paid-in new shares(+) | 35 | DART ↗ |
| 2025-06-02 | Jaebeom Park | Managing director | Others(-) | 16 | DART ↗ |
| 2025-06-02 | Jaebeom Park | Managing director | Acquisition of paid-in new shares(+) | 16 | DART ↗ |
| 2025-06-02 | Park Yong Chul | Managing director | Others(-) | 16 | DART ↗ |
| 2025-06-02 | Park Yong Chul | Managing director | Acquisition of paid-in new shares(+) | 9 | DART ↗ |
| 2025-06-02 | Chulhwan Moon | Managing director | Others(-) | 47 | DART ↗ |
| 2025-06-02 | Chulhwan Moon | Managing director | Acquisition of paid-in new shares(+) | 54 | DART ↗ |
| 2025-06-02 | Nah JaeHou | Managing director | Others(-) | 2 | DART ↗ |
| 2025-06-02 | Nah JaeHou | Managing director | Acquisition of paid-in new shares(+) | 2 | DART ↗ |
| 2025-06-02 | KIM HUN KYU | Managing director | Others(-) | 3 | DART ↗ |
| 2025-06-02 | Hyunwook Kim | Managing director | Others(-) | 4 | DART ↗ |
| 2025-06-02 | Hyunwook Kim | Managing director | Acquisition of paid-in new shares(+) | 4 | DART ↗ |
| 2025-06-02 | Iksoo Kim | Managing director | Others(-) | 3 | DART ↗ |
| 2025-06-02 | Iksoo Kim | Managing director | Acquisition of paid-in new shares(+) | 3 | DART ↗ |
| 2025-06-02 | Seol Kim | Managing director | Others(-) | 21 | DART ↗ |
| 2025-06-02 | Oujung Kwon | Managing director | Others(-) | 1 | DART ↗ |
| 2025-06-02 | Oujung Kwon | Managing director | Acquisition of paid-in new shares(+) | 1 | DART ↗ |
| 2025-06-02 | Yonghui Cho | Vice president | Others(-) | 28 | DART ↗ |
| 2025-06-02 | Lee ByungWoo | Vice president | Others(-) | 14 | DART ↗ |
| 2025-06-02 | Lee ByungWoo | Vice president | Acquisition of paid-in new shares(+) | 14 | DART ↗ |
| 2025-06-02 | Seo Heon | Vice president | Others(-) | 28 | DART ↗ |
| 2025-06-02 | Seo Heon | Vice president | Acquisition of paid-in new shares(+) | 31 | DART ↗ |
| 2025-06-02 | NAM JooYoung | Vice president | Others(-) | 4 | DART ↗ |
| 2025-06-02 | Heonjoon Kim | Vice president | Others(-) | 11 | DART ↗ |
| 2025-06-02 | Heonjoon Kim | Vice president | Acquisition of paid-in new shares(+) | 12 | DART ↗ |
| 2025-06-02 | PANBAE KIM | Vice president | Others(-) | 14 | DART ↗ |
| 2025-06-02 | PANBAE KIM | Vice president | Acquisition of paid-in new shares(+) | 15 | DART ↗ |
| 2025-06-02 | Yoon Tae KIM | Vice president | Others(-) | 14 | DART ↗ |
| 2025-06-02 | Yoon Tae KIM | Vice president | Acquisition of paid-in new shares(+) | 15 | DART ↗ |
| 2025-06-02 | KIM, YOON CHANG | Vice president | Others(-) | 9 | DART ↗ |
| 2025-06-02 | KIM, YOON CHANG | Vice president | Acquisition of paid-in new shares(+) | 9 | DART ↗ |
| 2025-06-02 | Yunjae Kim | Vice president | Others(-) | 8 | DART ↗ |
| 2025-06-02 | Yunjae Kim | Vice president | Acquisition of paid-in new shares(+) | 8 | DART ↗ |
| 2025-06-02 | Kim Sangkyun | Vice president | Others(-) | 14 | DART ↗ |
| 2025-06-02 | Kim Sangkyun | Vice president | Acquisition of paid-in new shares(+) | 15 | DART ↗ |
| 2025-06-02 | Bong Ok Kim | Vice president | Others(-) | 3 | DART ↗ |
| 2025-06-02 | Bong Ok Kim | Vice president | Acquisition of paid-in new shares(+) | 3 | DART ↗ |
| 2025-06-02 | JOO YOUNG GO | Vice president | Others(-) | 28 | DART ↗ |
| 2025-06-02 | JOO YOUNG GO | Vice president | Acquisition of paid-in new shares(+) | 31 | DART ↗ |
| 2025-06-02 | CHOI JOO SUN | CEO | Others(-) | 141 | DART ↗ |
| 2025-06-02 | CHOI JOO SUN | CEO | Acquisition of paid-in new shares(+) | 162 | DART ↗ |
| 2025-05-31 | Samsung Electronics | 10% shareholder | Acquisition of paid-in new shares(+) | 2,201,295 | DART ↗ |
| 2025-05-14 | Jaebeom Park | Managing director | Acquisition in exchange(+) | 8 | DART ↗ |
| 2025-05-12 | Sungwook Choi | Managing director | Disposal in exchange(-) | 28 | DART ↗ |
| 2025-05-08 | Ha Youngki | Managing director | Acquisition in exchange(+) | 26 | DART ↗ |