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Seoul Electronics & Telecom Co., Ltd. Stock: price and insider trades · South Korea

서울전자통신

KR·Mcap ₩26BTechnology

No insider purchase over the last 90 days. The latest, by 에스이티 제2호 투자조합, was filed 29 May 2026.

Seoul Electronics & Telecom Co., Ltd.: what insiders have been doing

Seoul Electronics & Telecom Co., Ltd. belongs to the Technology sector. Filings by its managers are published through DART (FSS). Between 10 November 2025 and 10 November 2026, 6 insiders published 10 filings.

Open-market activity splits into 7 purchases totalling €4.2M and 3 sales; 4 insiders sit on the buying side and 2 insiders on the selling side. The totals do not cover 8 filings with an undisclosed amount. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. The buyers include 3 major shareholders and 1 board member. At €2.2M, the purchase published on 29 May 2026 by 다온인터내셔널 is the largest of the period.

With 10 filings in twelve months, the company is more active than the median of 7 filings across the 2,630 companies we follow on the same exchange. Over the whole record (from 2021), the tally stands at 9 purchases and 5 sales.

Within a 30-day window, 5 purchases overlapped with buying by a second insider. Such overlaps are known as a cluster signal: distinct people reaching the same decision at about the same time. The most recent open-market purchase was published on 20 July 2026, 113 days ago. Filings reach the DART (FSS) feed a median of 8 days after the trade. This delay matters because a trade only becomes useful information once it is public.

Other companies in the same sector with recent insider buying flagged by our signals: Core Scientific, Inc./tx and Gitlab Inc. Source: insider filings from DART (FSS). Past trades are no guide to future returns.

Insider Decl.
22
Thresholds
n/a
Buy Volume
€4M
9 ops. · all time
Sell Volume
n/a
5 ops. · all time

Who traded when

BuySale
김원우2 sales
다온인터내셔널2 buys
에스이티 제2호 투자조합2 buys
김택수1 buy
에스이티 제1호 투자조합1 buy

Since the insiders bought

Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.

This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.

Fundamental score
Ranked 23,741 of 26,911 companies
23.7
score / 100
Value
12
Quality
35
FCF yld-13%
Earn yld-22%
EV/EBITDA·
ROE13%
Gross mgn17%
Net mgn-16%
Debt/EBITDA·
Pillars2/3

Transparent value + quality ranking, distinct from the insider signal.

Financial data

as of FY 2025

FY ended December 2025 · cache

₩1,870
Analyst consensus
·
Income statement
Revenue₩33.7B
Gross profit₩5.6B17% margin
EBITDA-₩2.3B-7% margin
Net income-₩5.3B4.6% margin
Valuation
Beta0.06
Balance sheet & cash
Market cap₩26B
Total debt₩16.3B
Free Cash Flow-₩3.3B
Debt / Equity66%
Profitability & ownership
ROE13.0%
ROA-4.6%
% insiders41.9%
% institutions0.0%
Last declaration on 29 May 2026
Declarations23 total
  • Other
    Other(filed)
    0DART
  • ▲
    Executives
    4B KRW22DART
    2,073,196 shares@ ₩1,864.00100.0% of flowShareKRXDART:20260529002338
    Canonical exit: 19 Aug 2026 (T+90)
  • ▲
    Related company / holdingExecutives
    3B KRW22DART
    1,876,675 shares@ ₩1,864.00100.0% of flowShareKRXDART:20260529002359
    Canonical exit: 19 Aug 2026 (T+90)
  • ●
    Executives
    Executives
    0DART
  • ▲
    Related company / holdingExecutives
    0DART
    1,876,675 sharesKRXDART:20260529002354
    Canonical exit: 19 Aug 2026 (T+90)
  • ▲
    Related company / holdingExecutives
    0DART
    1,876,675 sharesKRXDART:20260529002345
    Canonical exit: 19 Aug 2026 (T+90)
  • ▲
    대량보유자Executives
    0DART
    2,073,196 sharesKRXDART:20260529002335
    Canonical exit: 19 Aug 2026 (T+90)
  • ▲
    Executives
    0DART
    55,200 sharesShareKRXDART:20260522000576
    Canonical exit: 29 Jul 2026 (T+90)
  • ▼
    Executives
    0DART
    21,164,389 sharesShareKRXDART:20260521000731
  • ▼
    Executives
    0DART
    29,492,741 sharesKRXDART:20260521000741
  • ●
    Executives
    Executives
    0DART
  • ▼
    대량보유자Executives
    0DART
    460,000 sharesKRXDART:20240108000421
  • ●
    Executives
    Executives
    0DART
  • ▼
    Executives
    0DART
    1,397 sharesShareKRXDART:20230915000434
  • ▼
    Executives
    0DART
    23,974 sharesShareKRXDART:20230731000388
  • ▲
    Executives
    0DART
    20,000 sharesShareKRXDART:20230502000862
    Canonical exit: 27 Jul 2023 (T+90)
  • ▲
    Executives(filed)
    0DART
    395,000 sharesKRXDART:20230321000078
    Canonical exit: 19 Jun 2023 (T+90)
  • ▲
    Executives(filed)
    0DART
    5,000 sharesKRXDART:20220321001042
    Canonical exit: 19 Jun 2022 (T+90)
  • ●
    Executives
    Executives(filed)
    0DART
  • ●
    Executives
    Executives(filed)
    0DART
  • ●
    Executives
    Executives(filed)
    0DART
  • ●
    Executives
    Executives(filed)
    0DART
  • ●
    Executives
    Executives(filed)
    0DART

23 of 23 declarations

About Seoul Electronics & Telecom Co., Ltd.

서울전자통신 is a company specializing in the technology sector, listed on the XKRX. It focuses on the development and provision of electronic and communication solutions.