SOUTH KOREA · OPENDART
RF Materials Co., Ltd.
RF머트리얼즈 · 327260 · KOSDAQ · Technology · Electronic Components
Score
Not ranked: no net buying on the exchange by an individual insider in the last 180 days.
Insider timeline
No purchase in the last 180 days; 1 insiders sold.
Tap an item for what it means.
×A sale
A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.
Blue line: this share's price, −14.0% over these six months
The closing price of each day, from 52,010.32 on 2026-04-21 to 44,750.00 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, −31.9%
Taken from the 1525 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 −14.0%, the typical one −31.9%, 17.9 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 |
|---|---|---|---|---|---|---|
| SI-NAM KIM | Executive | — | 1 | — | — | — |
Insiders' buying price vs the latest close
No purchase price could be compared with the share price (price or share count missing, another currency, or far from that day's close).
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 |
|---|---|---|---|---|---|---|---|
| 2026-09-10 | SI-NAM KIM | Division head | Sold on the exchange | 10,000 | ₩43,925 | ₩439.2M | DART ↗ |
| 2026-02-09 | SI-NAM KIM | Division head | Bought on the exchange | 269 | ₩41,054 | ₩11.0M | DART ↗ |
| 2026-02-09 | SI-NAM KIM | Division head | Sold on the exchange | 9,000 | ₩40,800 | ₩367.2M | DART ↗ |
| 2026-02-09 | JOUNG-GI KIM | Division head | Sold on the exchange | 904 | ₩41,493 | ₩37.5M | DART ↗ |
| 2026-02-06 | SI-NAM KIM | Division head | Sold on the exchange | 6,755 | ₩40,335 | ₩272.5M | DART ↗ |
| 2026-02-06 | Park Geun Young | Division head | Sold on the exchange | 1,600 | ₩40,150 | ₩64.2M | DART ↗ |
| 2026-02-06 | Kim Ju Hyun | Inside director | Sold on the exchange | 3,184 | ₩40,155 | ₩127.9M | DART ↗ |
| 2026-02-06 | DONG-WOO NAM | CEO | Sold on the exchange | 31,000 | ₩40,343 | ₩1.3B | DART ↗ |
| 2026-01-05 | Kim Ju Hyun | Inside director | Sold on the exchange | 240 | ₩26,250 | ₩6.3M | DART ↗ |
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 |
|---|---|---|---|---|---|
| 2026-07-27 | Park Geun Young | Division head | Acquisition of new shares without compensation(+) | 2,542 | DART ↗ |
| 2026-07-27 | SI-NAM KIM | Division head | Acquisition of new shares without compensation(+) | 26,309 | DART ↗ |
| 2026-07-27 | JOUNG-GI KIM | Division head | Acquisition of new shares without compensation(+) | 6,000 | DART ↗ |
| 2026-07-27 | Kim Ju Hyun | Inside director | Acquisition of new shares without compensation(+) | 4,776 | DART ↗ |
| 2026-07-27 | DONG-WOO NAM | CEO | Acquisition of new shares without compensation(+) | 46,600 | DART ↗ |
| 2026-07-27 | RFHIC CORPORATION | 10% shareholder | Acquisition of new shares without compensation(+) | 3,736,749 | DART ↗ |
| 2026-07-09 | SI-NAM KIM | Division head | Acquisition of paid-in new shares(+) | 289 | DART ↗ |
| 2026-06-26 | SI-NAM KIM | Division head | Others(-) | 1,446 | DART ↗ |
| 2026-06-26 | SI-NAM KIM | Division head | Acquisition of paid-in new shares(+) | 1,446 | DART ↗ |
| 2026-06-26 | RFHIC CORPORATION | 10% shareholder | Others(-) | 207,742 | DART ↗ |
| 2026-06-26 | RFHIC CORPORATION | 10% shareholder | Acquisition of paid-in new shares(+) | 207,742 | DART ↗ |
| 2026-06-09 | JOUNG-GI KIM | Division head | Disposal in exchange(-) | 353 | DART ↗ |
| 2026-06-08 | DONG-WOO NAM | CEO | Disposal in exchange(-) | 94 | DART ↗ |
| 2026-06-05 | Park Geun Young | Division head | Disposal in exchange(-) | 149 | DART ↗ |
| 2026-06-05 | Kim Ju Hyun | Inside director | Disposal in exchange(-) | 281 | DART ↗ |
| 2026-06-05 | DONG-WOO NAM | CEO | Disposal in exchange(-) | 2,649 | DART ↗ |
| 2026-05-26 | Park Geun Young | Division head | Others(+) | 149 | DART ↗ |
| 2026-05-26 | JOUNG-GI KIM | Division head | Others(+) | 353 | DART ↗ |
| 2026-05-26 | SI-NAM KIM | Division head | Others(+) | 1,446 | DART ↗ |
| 2026-05-26 | Kim Ju Hyun | Inside director | Others(+) | 281 | DART ↗ |
| 2026-05-26 | DONG-WOO NAM | CEO | Others(+) | 2,743 | DART ↗ |
| 2026-05-26 | RFHIC CORPORATION | 10% shareholder | Others(+) | 207,742 | DART ↗ |
| 2026-01-09 | JOUNG-GI KIM | Division head | Exercise of appraisal rights(+) | 5,904 | DART ↗ |
| 2026-01-09 | DONG-WOO NAM | CEO | Exercise of appraisal rights(+) | 1,600 | DART ↗ |
| 2026-01-09 | Kim Ju Hyun | Inside director | Exercise of appraisal rights(+) | 400 | DART ↗ |
| 2025-03-24 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 4,387 | DART ↗ |
| 2025-03-21 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 2,011 | DART ↗ |
| 2025-03-20 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 2,916 | DART ↗ |
| 2025-03-19 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 10,000 | DART ↗ |
| 2025-03-18 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 6,504 | DART ↗ |
| 2025-03-14 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 5,000 | DART ↗ |
| 2025-03-13 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 234 | DART ↗ |
| 2025-03-12 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 4,785 | DART ↗ |
| 2025-03-11 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 10,000 | DART ↗ |
| 2025-03-10 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 2,774 | DART ↗ |
| 2025-03-07 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 2,389 | DART ↗ |
| 2025-03-05 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 5,000 | DART ↗ |
| 2025-03-04 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 5,000 | DART ↗ |
| 2025-02-28 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 5,000 | DART ↗ |
| 2025-02-27 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 10,000 | DART ↗ |
| 2025-02-25 | RFHIC CORPORATION | 10% shareholder | Acquisition in exchange(+) | 5,000 | DART ↗ |
| 2025-01-23 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 10,000 | DART ↗ |
| 2025-01-22 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 4,530 | DART ↗ |
| 2025-01-21 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 4,578 | DART ↗ |
| 2025-01-20 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 5,000 | DART ↗ |
| 2025-01-17 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 15,000 | DART ↗ |
| 2025-01-16 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 5,000 | DART ↗ |
| 2025-01-15 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 10,000 | DART ↗ |
| 2025-01-14 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 20,000 | DART ↗ |
| 2025-01-13 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 5,000 | DART ↗ |
| 2025-01-10 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 11,669 | DART ↗ |
| 2025-01-09 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 10,575 | DART ↗ |
| 2025-01-08 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 7,749 | DART ↗ |
| 2025-01-07 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 1,240 | DART ↗ |
| 2025-01-06 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 10,082 | DART ↗ |
| 2024-12-30 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 14,584 | DART ↗ |
| 2024-12-27 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 5,000 | DART ↗ |
| 2024-12-26 | RFHIC CORPORATION | 10% shareholder | 장내매수(+) | 8,000 | DART ↗ |
| 2024-12-11 | KI-WOO HAN | 10% shareholder | 증여(-) | 270,000 | DART ↗ |
| 2024-12-11 | KI-WOO HAN | 10% shareholder | 증여(-) | 170,000 | DART ↗ |