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Help me set up FinLab and analyze 4305 世坤. Please read: https://finlab.finance/en/setup?stock=4305

4305

世坤 Plastics As of 2026-06-17 Updated daily after market close

strong quality, discounted valuation, no active signal today.

This page refreshes daily after the close. Add 世坤 to your watchlist to track signal changes on your next visit.
Valuation 79Quality 85Growth 13Momentum 40Chips 20

Is 世坤 a buy? Fundamentals and valuation first

  • Top-tier profitability.Operating margin beats ~86% of the market. Latest quarterly ROE ≈ 4.8%.

  • Valuation is low.PE is in the 11th market percentile; within its own history, PE is around the 26th percentile.

  • Foreign investors are net selling.Foreign 20-day net flow ≈ -2.5% of volume (net sell).

Chip flow

Bullish +0.54
BearishNeutralBullish

Single-sided accumulation, concentration rising — bullish

  • Single-sided accumulation, concentration rising — bullish
  • 統一-新竹 holds 22 lots
  • sellers have 8 lots left, ~60 sessions to clear

Window from 2026-01-17 · Price +5% · branches to 2026-06-17· TDCC to 2026-06-12

  • Largest holder 統一-新竹 has accumulated 22 lots since the start (sold 0%), holding.
  • Main distributor 元大-土城學府 peaked at 9 lots, has sold 33%, 6 left, ~60 sessions to clear at the recent pace.
  • TDCC big holders (absolute) >1000-lot holders +1.32pp, mid holders +0, retail -0.01pp — concentration shifting upward.
  • Foreign hedge-desk net short Net short -20 lots (inferred from branch profile, mostly hedging — not necessarily bearish, not case-confirmed).
Branch inventory reconstruction
Accumulating holders Branches that accumulated shares during the window and still hold positive inventory; they are the absorbing side.
Distributing sellers Branches that built inventory earlier and have been selling it down; the remaining number estimates what has not cleared.
Net-short desks Trading-desk branches with negative inventory or net selling, often hedge, offsetting, or short-term flow. It is not automatically a bearish view.
Accumulating
統一-新竹元大-佳里兆豐-台中港富邦-台南永豐金證券玉山-嘉義
Distributing
元大-土城學府新光-高雄國泰-台南元富-城中元大-永和凱基-信義
Desks
own scale
富邦-彰化玉山-雙和大昌-安康玉山-桃園
Price Accumulating & Distributing share one scale (comparable); Desks is independent. Zero is the baseline
Branch details Unit: lots

Accumulating

  • 統一-新竹 +22
    sold 0%
  • 元大-佳里 +16
    sold 0%· still adding
  • 兆豐-台中港 +16
    sold 0%
  • 富邦-台南 +14
    sold 0%
  • 永豐金證券 +12
    sold 0%
  • 玉山-嘉義 +11
    sold 0%· still adding

Distributing

  • 元大-土城學府 6 left
    sold 33%· ~60 sessions to clear
  • 新光-高雄 1 left
    sold 89%· ~1 sessions to clear
  • 國泰-台南 6 left
    sold 25%· paused recently
  • 元富-城中 2 left
    sold 33%· paused recently
  • 元大-永和 1 left
    sold 50%· paused recently
  • 凱基-信義 1 left
    sold 50%· ~10 sessions to clear

Desks

  • 富邦-彰化 -25
    unclassified
  • 玉山-雙和 -23
    unclassified
  • 大昌-安康 -17
    unclassified
  • 玉山-桃園 -15
    unclassified
Still selling 8 lots ~60 sessions to bottom at most
Recent buy/sell force +65 absorbed / -10 sold buyers slightly ahead
TDCC big holders · absolute-holding cross-check
>1000-lot holder share Retail (<400 lots) share Price (right axis)

Direction matches: big-holder share rose while retail share fell.

Describes chip flow, not investment advice. Branch data discloses only high-volume branches with ~1-day lag; TDCC is weekly. Inventory is a relative reconstruction from the window start, not absolute holdings.

Historical evidence

Valuation regime and subsequent returns

Each day's PE is converted to its own-history percentile (as of that day), then we look at adjusted-close returns over the next 240 trading days by valuation regime.

PE percentile bandSample days240-day avg returnMedianWin rateAvg excess (vs index)
0-20 732+18.8% +18% 97.3% +0.9%
20-40 You are here615+10.1% +11.7% 83.1% -7.4%
40-60 567+11.6% +7.8% 69.3% +0.5%
60-80 972+7.7% +3.6% 69.3% -8.6%
80-100 149+4.4% +5.1% 89.9% -22.4%

Percentiles use an expanding own-history window (no look-ahead); forward return is 240 trading days on adjusted close. Sample days overlap; distribution is indicative only.

Current PE ≈ 11.34, at the 26.1th percentile of its own history (20-40 band).

Valuation × momentum historical grid

Every day in its own history is bucketed by valuation tercile (own-history PE) and 60-day momentum sign into six cells; we show adjusted-close returns over the next 120 trading days per cell.

Valuation
Momentum
Cheap (own-history bottom 1/3)
Mid
Expensive (own-history top 1/3)
60-day momentum up
+7.4%
Win rate 88.3% Excess -3%
710d
+7.2%
Win rate 72.4% Excess -0.9%
717d
+0.7%
Win rate 47.7% Excess -6.2%
365d
60-day momentum down
Now
+10.5%
Win rate 89.7% Excess +1.7%
310d
+3.7%
Win rate 59% Excess -2.8%
329d
+0.6%
Win rate 56.8% Excess -8.3%
324d

Currently in “Cheap (own-history bottom 1/3) × 60-day momentum down”: across 310 historical days, 120-day forward avg gained 10.5%, win rate 89.7%, beat the market by 1.7%.

Days = trading days in this bucket; returns use adjusted prices, ex-costs. 60-day momentum: direction of this stock's price over the past 60 trading days.

Signals not active (historical stats for reference)

These are not occurring now; historical samples shown for comparison.

252-day price high (breakout)

Pending

Adjusted close makes a new 252-day high; repeats within 20 days counted once.

41 times historically; 60-day forward avg +2.42%, win rate 41.5%, beating the market by -1.8 pts on average.

Monthly revenue YoY ≥ 20% (from filing deadline)

Pending

Monthly revenue YoY ≥ 20%; event date is the first trading day after the filing deadline (no look-ahead).

49 times historically; 60-day forward avg -1.58%, win rate 47.7%, beating the market by -3.25 pts on average.

Foreign net buying for 5 straight days

Pending

Foreign net flow (ex-dealer) positive for 5 straight days; event on day 5; repeats within 20 days counted once.

What does 世坤 do? Company profile

塑膠工業 上櫃

Overview

4305 為櫃買中心上櫃普通股,證券簡稱世坤;公司正式年報與官網使用「世堃塑膠股份有限公司」,英文名 SHIH-KUEN PLASTICS CO., LTD.。公司成立於 1986 年 10 月,1986 年創立於台南市麻豆區,2000 年 9 月 28 日股票正式上櫃交易。總部與工廠地址為台南市麻豆區麻口里麻工三路 125 號、127 號。董事長為林璋賦,總經理與發言人為陳俊成。股本為新台幣 550,140,000 元,已發行普通股 55,014,000 股。員工規模:2024 年 102 人,截至 2025 年 4 月 30 日 101 人,其中營業行政 22 人、生產製造 71 人、研發 8 人。主要股東截至 2025 年 4 月 21 日包括陳俊成 6.64%、洪志成 6.60%、洪志明 5.66%、鴻博投資 5.36%、林璋賦 4.74%、偉固投資 4.66%、玉山銀行信託財產專戶 4.54%、林子峻 4.34%、林杰縈 4.34%、洪惠斌 3.33%。公司土地面積約 9,726 坪、廠房約 5,508 坪;2004 年通過 ISO 9001,2017 年更新 ISO 9001:2015 並取得德國萊因 TÜV 企業營運能力認證,2019 年通過 ISO 14001:2015。2025 年 4 月官網公告 ISO 14001:2015 續證,效期至 2028 年。

Business

世坤為專業 PVC 軟質膠布與塑膠布製造商,主要從事各種塑膠皮、塑膠布、乳膠皮、印刷乳膠皮、塑膠製品、布類貼膠、塑膠原料之製造加工買賣與進出口。2024 年營收新台幣 1,043,282 仟元,產品營收結構為一般塑膠布 707,748 仟元、67.84%;加壓塑膠布 89,585 仟元、8.59%;貼合塑膠布 62,763 仟元、6.02%;半硬質塑膠布 183,113 仟元、17.55%;其他 73 仟元。銷售地區以內銷為主,2024 年內銷 929,184 仟元、89.06%,外銷 114,098 仟元、10.94%,外銷區域包括東亞、東南亞、中東、歐美澳等地。公司商業模式偏向少量多樣、客製化 PVC 膠布量產,服務中小企業、小訂單客戶,同時開發大型企業產品認證以爭取訂單;主要客戶群為貿易經銷商及下游產品二次加工製造商。產品應用包含雨衣、浴簾、桌巾、文具、吹氣玩具、棉被袋、傢俱套、汽車窗簾、電腦割字、廣告招牌、噴墨廣告、夾網雨帆、電氣膠帶、包裝膠帶、桌墊、靜電貼膜、木紋建材、地磚、貼鋼板、運動安全頭盔、相片護貝、蓄光貼紙、醫療用尿袋、嬰兒車風雨罩、媽媽袋等。2025 年全年營收為新台幣 1,080,249 仟元,年增 3.54%;2026 年 1 至 5 月累計營收 425,840 仟元,較去年同期 454,464 仟元衰退約 6.30%。

Outlook 2025–2028

2025 至 2028 年展望以穩健經營、產品客製化、原料與法規管理、外銷拓展為主。成長動能包括:一、PVC 塑膠布因價格便宜、用途廣泛、加工容易,在日常用品、廣告、建材、文具、醫療與包裝等應用仍具需求,公司年報認為替代材質成本高且加工性不足,PVC 用量仍有增加空間;二、少量多樣訂單與快速排產能力有助於避開大廠以大企業、大訂單為主的競爭區隔;三、公司持續參與大型企業產品認證,若認證與客戶導入成功,有機會擴大訂單;四、耐候性、強韌性、硬質塑膠布等技術研發有助於提高附加價值;五、外銷市場持續拓展,產品已銷往東亞、東南亞、中東、歐美澳等地。2025 年營收年增 3.54%,但 2026 年前 5 月累計營收年減 6.30%,顯示短期需求與客戶庫存循環仍有波動。2025 至 2028 年主要風險包括 PVC 粉、DINP 可塑劑、安定劑等原料價格受石化景氣、油價、匯率與供需影響;中國與東南亞低成本競爭者以低價爭取訂單;國內缺工與工資上升;環保與化學品法規如 RoHS、REACH、Non-Phthalate、CHCC 趨嚴;外銷訂單受匯率、貿易環境及終端需求影響。公司因持有大量美元與歐元貨幣性資產,亦有匯率敏感度。整體判斷,2025 至 2028 年較可能呈現低至中度成長、重視高附加價值與合規產品的成熟型營運公司,而非高速擴張型公司;2028 年以前 ISO 14001 續證有效,有利於維持海外客戶 ESG 與品質稽核門檻。

Supply Chain

Upstream
  • 台灣塑膠工業股份有限公司 1301 主要 PVC 粉供應商;2024 年進貨金額 313,212 仟元,占進貨淨額 48.87%,2025 年第一季占 46.04%。
  • 聯成化學科技股份有限公司 1313 DINP 可塑劑主要供應商;年報列示聯成石油化學為供應商,2024 年進貨金額 182,806 仟元,占進貨淨額 28.52%,2025 年第一季占 31.80%。
  • ITOCHU 日本商社,年報列為 PVC 粉進口供應來源之一;非台股掛牌公司。
  • MITSUBISHI 日本商社或化學材料供應來源,年報列為 PVC 粉進口供應來源之一;非台股掛牌公司。
  • PVC 粉、DINP 可塑劑、環氧大豆油、安定劑供應商 世坤主要原料包含 PVC 粉、可塑劑、安定劑與環氧大豆油;除已揭露主要供應商外,其他供應商未逐名揭露。
Downstream
  • 貿易經銷商與塑膠布盤商 主要客戶群之一,負責將 PVC 膠布分銷至下游二次加工與終端應用廠商;年報未揭露個別公司名稱。
  • 下游產品二次加工製造廠商 主要客戶群之一,採購塑膠布後加工為雨衣、文具、玩具、廣告材料、建材、醫療尿袋、桌墊、汽車窗簾等終端產品;年報以 A 公司、B 公司、C 公司匿名揭露主要銷貨客戶。
  • A 公司 年報匿名揭露之最大銷貨客戶,2024 年銷貨 391,414 仟元,占銷貨淨額 37.52%;2025 年第一季占 38.72%,未揭露實際名稱與是否掛牌。
  • B 公司 年報匿名揭露之主要銷貨客戶,2024 年銷貨 104,994 仟元,占銷貨淨額 10.06%;2025 年第一季占 8.28%,未揭露實際名稱與是否掛牌。
  • C 公司 年報匿名揭露之主要銷貨客戶,2024 年銷貨 85,389 仟元,占銷貨淨額 8.19%;2025 年第一季占 7.85%,未揭露實際名稱與是否掛牌。

Competitors

  • 南亞塑膠工業股份有限公司 1303 年報與 MoneyDJ 均列為國內塑膠布主要競爭廠商;大型企業定位,與世坤中小企業、小量多樣定位不同。
  • 華夏海灣塑膠股份有限公司 1305 年報列為國內塑膠布主要供應與競爭廠商之一;台股上市公司簡稱華夏。
  • 大洋塑膠工業股份有限公司 1321 年報與 MoneyDJ 列為國內塑膠布主要競爭廠商之一;台股上市公司簡稱大洋。
  • 中國與東南亞低成本 PVC 塑膠布廠商 年報指出中國與東南亞生產業者以低勞工成本、低價爭取市場訂單;多數個別公司未揭露或非台股掛牌。
Sources(12)

This company profile is compiled from public sources (annual reports, filings, news and analyst reports), not finlab backtest data; the 2025–2028 outlook contains forward-looking estimates and is for reference only.

Method and limitations

  • All returns use adjusted close (etl:adj_close), already adjusted for dividends and splits.
  • Excess return is measured against the TAIEX total-return index (dividends included).
  • Valuation regime and percentile stats use an expanding own-history window (no future data).
  • Revenue-signal event dates align to the first trading day after the filing deadline, avoiding look-ahead.
  • Event samples may overlap in time; stats describe historical distribution only and are less reliable when samples are few.

This page is historical statistics for educational purposes and is not investment advice. Investing involves risk; past performance does not indicate future results. Assess and bear the risk yourself before trading.