Taihan Fiber Optics Co., Ltd Stock: price and insider trades · South Korea
대한광통신
No insider purchase over the last 90 days. The latest, by 설윤석, was filed 09 Mar 2026.
Who traded when
BuySaleSince the insiders bought
- +150.5%Entry ₩5,510 · Close 30 Oct 2026 ₩13,800
- +150.5%Entry ₩5,510 · Close 30 Oct 2026 ₩13,800
- +331.3%Entry ₩3,200 · Close 30 Oct 2026 ₩13,800
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.
Transparent value + quality ranking, distinct from the insider signal.
Financial data
as of FY 2025FY ended December 2025 · cache
- 772,600 sharesKRXDART:20260714000456
- 357,600 sharesShareKRXDART:20260714000465
- 624,860 sharesShareKRXDART:20260703000614
- 316,640 sharesShareKRXDART:20260703000622
- 1,289,804 sharesKRXDART:20260703000609
- 1,012,000 sharesShareKRXDART:20260625000605
- 1,012,000 sharesKRXDART:20260625000603
- ●Executives0DART
- ●Executives0DART
- 1,510,543 sharesKRXDART:20260401004407
- 0KRXDART:20260316001154
- ●Executives0DART
- 236,268 sharesKRXDART:20260309001888
- 2,126,419 sharesKRXDART:20260309001872Canonical exit: 3 May 2026 (T+90)
- 1,515,835 shares@ ₩2,340.000.079% mcap100.0% of flowShareKRXDART:20260309001908Canonical exit: 7 Jun 2026 (T+90)
- 1,257,702 shares@ ₩2,340.000.065% mcap100.0% of flowShareKRXDART:20260309001903Canonical exit: 7 Jun 2026 (T+90)
- 4,914,004 sharesKRXDART:20260206002010Canonical exit: 3 May 2026 (T+90)
- 761,886 sharesShareKRXDART:20260206002026
- 1,246,137 sharesShareKRXDART:20260206002016
- 1,564,387 sharesShareKRXDART:20260130000623Canonical exit: 30 Apr 2026 (T+90)
- 1,911,979 sharesShareKRXDART:20260130000630Canonical exit: 30 Apr 2026 (T+90)
- 300,000 sharesKRXDART:20260102000137Canonical exit: 26 Jan 2026 (T+90)
- ShareKRXDART:20251224000654
- 0KRXDART:20251212000390
- 1,281,850 sharesKRXDART:20250926000685
25 of 35 declarations
About Taihan Fiber Optics Co., Ltd
Two purchases dated March 9, 2026 stand out at Taihan Fiber Optics Co., Ltd (대한광통신): EUR 968,137 under the executive 설윤석 (대표이사) and EUR 803,272 under 티에프오인더스트리. They are the only purchases with an amount, EUR 1,771,409 in all.
The South Korean technology company has 35 insider filings published between March 4, 2021 and July 14, 2026, from 7 filers. 티에프오인더스트리, filed as 대량보유자, accounts for 14, with 3 purchases and 7 sales. 설윤석 has 7 filings, 2 purchases and 2 sales, and 포커스자산운용 has 4, also 2 purchases and 2 sales. The record holds 8 purchases and 13 sales, 38% purchases, and no sale carries an amount.
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The pace has shifted: 2 filings in 2021, 1 in 2022 and 2023, 3 in 2024, 6 in 2025, then 22 in 2026. From January 30 to February 2, 2026, 3 filers bought. Insiders hold 15.1% of a company capitalised at KRW 2.0 trillion. In the last 12 months there are 24 filings, 7 purchases and 11 sales. Among the 13 filings with a measured delay, the median one appears 2 days after the trade.
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