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LIGHTRON FIBER-OPTIC DEVICES INC.

빛과전자069540KOSDAQSector: Electronics & Semiconductors
₩2,8400.18%Market cap ₩320.0BAs of Sep 1, 2026 close · updated once daily
Market cap
₩320.0B
#257 in KOSDAQ
Loss
PER not computable
5.53x
Sector median 1.20x
0.0%
Sector median 0.0%
D
Grade D27.2 ptsBottom 11% of 2,523 graded stocksMethodology v2.0
Financial strength
27.3/100
Growth momentum
33.7/100
Price attractiveness
21.4/100
Shareholder Return
33.6/100

As of Sep 1, 2026 close · This grade is not a buy/sell recommendation — it is information mechanically scored from public data using a fixed formula.

How to read this grade
SABCDCurrentF

Toward S means a higher total-score band; toward F, a lower band. Badges are distinguished by ink intensity and shape (fill, outline, dashed) — never by hue.

Maegim maps a total score — built from sector-relative percentile scoring — onto fixed, predefined thresholds to assign one of six bands, S to F. This stock is scored by the same formula as all 2,523 graded stocks and is currently in band D with a total score of 27.2 points.

How grades are computed →What grades do and don’t mean →What the grade does not reflect →

Position within sector

Mechanically selected indicators in the top or bottom 30% of sector percentiles · among 492 stocks in Electronics & Semiconductors

1-year closing price

Loading closing price history…
 
Low ₩592High ₩6,990
Latest close
Price change by period
1W
4.00%
1M
51.20%
3M
30.70%
1Y
188.00%

As of the Sep 1, 2026 close · updated once daily · a factual record computed from closing prices only; dividends are not included, and this is not a buy or sell signal.

1

Financial strength

27.3/100
How much debt does it carry relative to equity?
57.3%
Sector median 61.3%
Sector lowhighTop 48.4% in sector
Can it cover what's due within a year?
124.5%
Sector median 185.8%
Sector lowhighBottom 31.9% in sector
How much of revenue becomes profit?
-52.0%
Sector median 2.0%
Sector lowhighBottom 9.8% in sector
How much did it earn on its own capital?
-33.4%
Sector median 2.1%
Sector lowhighBottom 15.8% in sector

Source filing: annual report (consolidated) — view original ↗

2

Growth momentum

33.7/100
How much did revenue grow in a year?
75.2%
Sector median 4.4%
Sector lowhighTop 4.6% in sector
Has it grown steadily over three years?
-15.4%
Sector median 0.7%
Sector lowhighBottom 11.3% in sector
Did core profits grow in a year?
-60.9%
Sector median 2.2%
Sector lowhighBottom 25.8% in sector
Are core profits higher than three years ago?
-1454.7%
Sector median -28.7%
Sector lowhighBottom 2.2% in sector

Financial trend

Revenue

Growth & margin

Revenue growth Operating margin

Year over year — alongside the sector median

This stock Sector median

A factual chart of confirmed annual results from annual reports — the same source as the grading indicators. Not a buy or sell signal.

Source filing: annual report (consolidated) — view original ↗

3

Price attractiveness

21.4/100
Is the price expensive relative to earnings?
Loss-making (P/E not computable)
Sector median P/E of profitable peers 17.6x · 43% loss-making
Sector lowhighBottom 29.2% in sector
Is the price expensive relative to book value?
5.53x
Sector median 1.20x
Sector lowhighBottom 13.5% in sector

Valuation uses the Sep 1, 2026 close and market cap

4

Shareholder Return

Single-indicator axis33.6/100
Does the company actually pay dividends?
0.0%
Sector median 0.0%
Sector lowhighBottom 33.6% in sector

Source filing: annual report (consolidated) — view original ↗

Financial checklist

Based on the FY2025 annual report · year-over-year comparison · determined on Sep 1, 2026

Of 9 items: 4 met · 5 not met · 0 not computable

Not metMetNot computable

Positive net income
Whether net income (attributable to owners where available) is above zero.
Not met
-₩19.7B
Positive operating cash flow
Whether cash flow from operations is above zero.
Not met
-₩3.4B
Return on assets up
Whether net income over beginning total assets rose from the prior year.
Met
-26.5% → -24.1%
Operating cash flow exceeds net income
Whether operating cash flow is greater than net income.
Met
-₩3.4B vs -₩19.7B
Liabilities-to-assets ratio down
Whether total liabilities as a share of total assets fell from the prior year.
Not met
23.4% → 36.4%
Current ratio up
Whether current assets over current liabilities rose from the prior year.
Not met
285.2% → 124.5%
Shares outstanding not increased
Whether common shares issued did not increase from the prior year. Increases from bonus issues and stock dividends are also counted.
Not met
46,037,579 → 60,990,153
Operating margin up
Whether operating income over revenue rose from the prior year.
Met
-56.6% → -52.0%
Asset turnover up
Whether revenue over beginning total assets rose from the prior year.
Met
0.26x → 0.39x

A record of facts determined by fixed rules from the financial statements in the latest annual report. Not used in grading, and not a buy or sell signal. Source filing: annual report (consolidated) — view original ↗

Grade change history

Jul 23, 2026D

Methodology version change (v2.0 applied)

Jul 15, 2026DVersion v1

First calculation

Grade changes are a factual record produced from public data by a fixed formula; they do not signal future changes.

Disclosure & financial badges

Factual records determined from public filings and periodic reports by fixed rules — not buy/sell signals.

Negative-evidence group (dilution, loss, dispute)Mixed interpretationPositive-evidence group (shareholder return)Dots classify the disclosure type by the direction of research evidence — not an assessment or investment judgment about this company.

Disclosure event history

Large paid-in capital increase resolved

Disclosed a paid-in capital increase (제3자배정증자) issuing 36,124,794 new shares, equal to 59.2% of shares outstanding before the increase (filed 2026-02-10). 3 filings meeting the same criteria were disclosed in the past 24 months. View filing ↗

Private CB/BW issuance resolutions (past 36 months)

7 private-placement convertible bond (CB) / bond-with-warrants (BW) issuance resolutions were disclosed in the past 36 months (latest filing 2026-07-29). View filing ↗

CB with conversion-price adjustment clause (past 36 months)

7 convertible bond (CB) issuance resolutions including a downward conversion-price adjustment (refixing) clause were disclosed in the past 36 months (latest filing 2026-07-29). View filing ↗

Largest-shareholder changes (past 36 months)

The largest shareholder changed 3 times in the past 36 months (latest change 2025-08-27, per annual report).

Financial fact combinations

Operating losses for 3 consecutive fiscal years

Recorded operating losses in three consecutive fiscal years, FY2023–FY2025 (per annual reports).

Determined as of 2026-09-01

Recent filings for this stock

Last 120 days · monitored filing types only
Periodic report filedAug 14, 2026Source ↗
Convertible bond issuanceJul 29, 2026Source ↗
Convertible bond issuanceMay 15, 2026Source ↗
Periodic report filedMay 15, 2026Source ↗

View in the filings calendar →