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4558

寶緯 Electric Machinery As of 2026-06-17 Updated daily after market close

steady quality, premium valuation.

1 active signal
Revenue ≥20%
This page refreshes daily after the close. Add 寶緯 to your watchlist to track signal changes on your next visit.
Valuation 32Quality 34Growth 78Momentum 20Chips 59

Is 寶緯 a buy? Fundamentals and valuation first

  • Above-average profitability.Operating margin is in the 40th market percentile. Latest quarterly ROE ≈ 0.3%.

  • Valuation is high.PE is in the 100th market percentile.

  • Foreign investors are net buying.Foreign 20-day net flow ≈ 1.5% of volume (net buy).

  • Strong revenue growth.Latest monthly revenue YoY ≈ 36.1%, above the 20% growth threshold.

  • Signals are active now.On the latest data, signals such as Revenue YoY ≥ 20% are active — see the historical forward returns after each occurrence below.

Chip flow

Bullish +0.34
BearishNeutralBullish

Institutional rotation, concentration steady — bullish

  • Institutional rotation, concentration steady — bullish
  • 光和-溪湖 holds 375 lots
  • sellers have 50 lots left, ~30 sessions to clear

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

  • Largest holder 光和-溪湖 has accumulated 375 lots since the start (sold 0%), still adding.
  • Main distributor 元大-頭份 peaked at 68 lots, has sold 90%, 7 left, paused recently.
  • TDCC big holders (absolute) >1000-lot holders -0.62pp, mid holders +2, retail -1.10pp — little change.
  • Foreign hedge-desk net short Net short -111 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
光和-溪湖元大-大同光和華南永昌-台中光和-田中口袋證券
Distributing
元大-頭份富邦-青埔富邦-台南富邦-永和凱基統一-竹南
Desks
own scale
富邦-南員林華南永昌-林口元大-中壢土銀-和平
Price Accumulating & Distributing share one scale (comparable); Desks is independent. Zero is the baseline
Branch details Unit: lots

Accumulating

  • 光和-溪湖 +375
    sold 0%· still adding
  • 元大-大同 +166
    sold 0%
  • 光和 +88
    sold 0%· still adding
  • 華南永昌-台中 +86
    sold 1%
  • 光和-田中 +71
    sold 0%· still adding
  • 口袋證券 +64
    sold 2%

Distributing

  • 元大-頭份 7 left
    sold 90%· paused recently
  • 富邦-青埔 23 left
    sold 44%· ~13 sessions to clear
  • 富邦-台南 7 left
    sold 67%· ~23 sessions to clear
  • 富邦-永和 3 left
    sold 84%· paused recently
  • 凱基 10 left
    sold 44%· paused recently
  • 統一-竹南 5 left
    sold 67%· paused recently

Desks

  • 富邦-南員林 -395
    unclassified
  • 華南永昌-林口 -122
    unclassified
  • 元大-中壢 -115
    unclassified
  • 土銀-和平 -94
    unclassified
Still selling 50 lots ~30 sessions to bottom at most
Recent buy/sell force +386 absorbed / -35 sold buyers slightly ahead
Hedge-desk net short -2 lots potential cover-buying, not selling pressure
TDCC big holders · absolute-holding cross-check
>1000-lot holder share Retail (<400 lots) share Price (right axis)

Mixed direction: big-holder and retail changes are not aligned.

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

Signals active now

These signals are true on the latest data, with this stock's own historical forward-return stats after each occurrence.

Monthly revenue YoY ≥ 20% (from filing deadline)

Active · now 36.06%

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

41 historical occurrences (since 2022-03-17)
Average forward return after Monthly revenue YoY ≥ 20% (from filing deadline)。20-day: Win 27.3%, Sample 11, Median -5.07%, Excess -2.03%, Beat mkt rate 45.5%；60-day: Win 30%, Sample 10, Median -19.56%, Excess -16%, Beat mkt rate 20%；120-day: Win 0%, Sample 10, Median -19.15%, Excess -36.88%, Beat mkt rate 0%

120 days after: historical avg -19.7%

20-day -2.94%
60-day -11.49%
120-day -19.7%
20-day
60-day
120-day
Win
27.3%
30%
0%
Sample
11
10
10
Median
-5.07%
-19.56%
-19.15%
Excess
-2.03%
-16%
-36.88%
Beat mkt rate
45.5%
20%
0%

Over 10 occurrences, 120-day forward avg declined 19.7%, lagged the market by 36.88 pts; win rate 0%.

Does this signal hold up across the market

Over the past 242 months, on average ~404 stocks per month met “monthly revenue YoY ≥ 20%”; their adjusted-close return over the next 60 trading days averaged 6.94% (equal-weighted), beating the market by 2.37 points on average, and outperformed the TAIEX total-return index in 64.5% of months.

Each month, equal-weighted 60-day forward adjusted return of all signal-matching stocks, then averaged across months; excess vs the TAIEX total-return index.

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.

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 寶緯 do? Company profile

電機機械；鋁擠型、鋁加工與建築鋁材 上櫃

Overview

4558 對應證券為寶緯工業股份有限公司，英文簡稱 Alformer，為櫃買中心上櫃普通股，非 ETF、ETN、權證或特別股。公司設立於 1989 年 3 月 9 日，總部及北斗廠位於彰化縣北斗鎮財神路 30 號，另有田尾廠位於彰化縣田尾鄉。董事長為詹勳霖，總經理為詹勳國，發言人為詹俊毅。公司於 2014 年 8 月公開發行、2014 年 11 月興櫃、2022 年 3 月 17 日上櫃。實收資本額約新台幣 5 億元，已發行普通股 50,000,000 股。公司官網揭露北斗廠約 6,501 坪、田尾廠約 2,000 坪，工廠包含鋁擠型、陽極處理、鋁窗、CNC、鍛造等；歷史沿革顯示 2011 年員工增至約 200 人，但本次未取得 2026 年最新員工人數。董監及內部人方面，資料庫顯示董事長詹勳霖、總經理詹勳國、董事劉振銘、詹俊毅及關係投資公司為主要可辨識持股者，董監持股約 8% 左右；完整前十大股東與最新持股比例未能在本次可公開擷取資料中逐項確認。

Business

寶緯為專業鋁擠型與鋁加工廠，商業模式以接單製造、客製化設計、生產加工及部分工程/系統產品服務為主，強調從模具開發、鋁擠型、陽極處理、CNC 加工、鍛造到鋁門窗/鋁模板系統的一貫化能力。主要產品包含工業鋁擠型、鋁門窗、建築材料、鋁合金模板、太陽能板框與支架、鋁鍛造件、鋁材電解/陽極處理、CNC 加工件等。公司可生產 1000、2000、5000、6000、7000 系鋁擠產品，官網稱年產能約 15,000 噸；2022 年新增擠型線後，媒體報導年產能目標提升至約 18,000 噸。2026 年 6 月法說資料顯示，產品分類營收占比：2024 年工業料 57%、建築料 36%、工程收入 5%、其他 2%；2025 年工業料 69%、建築料 24%、工程收入 2%、其他 5%；2026 年第一季工業料 63%、建築料 25%、工程收入 1%、其他 11%。依應用產業，2026 年第一季為半導體 18%、健身器材 1%、車用零配件 8%、建材 29%、鋁模板 8%、其他 36%。主要終端應用包含半導體廠自動搬運/設備軌道與模組支架、建築鋁門窗與帷幕牆、公共工程與社會住宅、鋁模板租賃/製造、太陽能結構件、汽機車與自行車零組件、健身器材等。媒體報導指出，半導體領域客戶鏈包含台灣大福、富泰空調等設備供應商，終端連結日本大福、村田機械及晶圓代工廠；運動休閒客戶包括期美公司，為 Peloton 在台子公司。

Outlook 2025–2028

2025 至 2028 年展望可分為兩條主線。第一是 AI 與半導體擴廠帶動的工業鋁材需求：公司在 2026 年 6 月法說相關資料中表示，半導體相關訂單能見度已達 2027 年，受惠 AI 晶片需求、晶圓廠新建與自動化搬運系統投資，半導體設備軌道、模組化支架及精密鋁合金零組件有機會維持成長。第二是綠色營建與鋁模板：公司規劃鋁模板一貫化新廠於 2026 年第三季完工/投產，整合設計、製造、維修、倉儲與回收，並以租賃模式降低營造商持有成本；鋁模板相較傳統木模可重複使用、減少營建廢棄物，契合缺工、工期縮短、ESG 與低碳建築趨勢。中長期至 2028 年，若新廠順利放量，鋁模板滲透率提高，且半導體資本支出循環延續，寶緯有機會從傳統鋁擠型加工提升至較高附加價值的精密工業材與系統化建材服務。主要風險包括：鋁錠等原料價格波動、LME 鋁價與匯率波動、毛利率受產品組合與加工價差壓縮、建築景氣與政府公共工程進度、半導體擴廠節奏遞延、客戶集中或終端需求波動、國際關稅與地緣政治、鋁模板租賃模式的資金占用與回收管理、國內外鋁模板競爭者與專利/公平交易爭議。公司表示以安全庫存、年約採購、公式化報價等方式降低鋁價波動，但無法完全消除短單與價格急變風險。

Supply Chain

Upstream
  • 鋁錠、鋁棒及鋁合金原料供應商 主要原料類別；公開資料確認鋁為公司核心原料且價格受期貨市場波動影響，但本次未取得寶緯最新主要供應商名單，因此不臆測個別公司。
  • 模具、擠型機、CNC、陽極處理與鍛造設備供應商 製程設備與耗材供應鏈；公司具擠型、陽極、CNC、鍛造一貫化產線，個別設備供應商未在本次來源中明確揭露。
  • 再生鋁與回收鋁料供應/回收體系 鋁模板與低碳鋁材策略相關；法說摘要提及提升再生鋁使用與循環經濟，但未確認特定掛牌供應商。
Downstream
  • 台灣大福高科技設備股份有限公司 半導體自動搬運系統供應鏈客戶；媒體報導寶緯供應鋁合金零件予台灣大福，台灣大福再供應日本大福等半導體設備搬運系統，未上市。
  • 富泰空調科技股份有限公司 半導體設備/搬運系統相關客戶；媒體報導其供應鏈連結村田機械，未上市。
  • 台積電等晶圓代工廠 2330 終端應用客戶；媒體與法說摘要以全球晶圓代工龍頭/台積電擴廠作為需求來源，寶緯多透過設備商進入終端供應鏈，非必然直接銷售。
  • 期美科技股份有限公司 健身器材應用客戶；媒體報導為 Peloton 在台子公司，未上市。
  • Peloton Interactive, Inc. 健身器材終端品牌，美國上市公司，非台股掛牌；寶緯透過期美等供應鏈參與。
  • 營造商、公共工程與社會住宅業主 鋁門窗、建材與鋁模板系統下游客戶群；包含公共工程、社宅與一般營建案，公開來源未逐案確認最新客戶名稱。
  • 太陽能系統與支架通路/工程商 太陽能邊框、支架與鋁擠型應用下游；本次未取得特定上市櫃客戶名單。

Competitors

  • 廷鑫 2358 股感列為寶緯鋁鋅/鋁材相關競爭對手；實際競爭範圍與營運狀態需另查最新公開資訊。
  • 高鋁 股感列為同業競爭對手；業務同屬鋁材加工相關。
  • 峰安 股感列為同業競爭對手；是否屬上市櫃或興櫃狀態需以櫃買/公開資訊觀測站最新資料確認。
  • 紐新 股感列為同業競爭對手；是否屬上市櫃或興櫃狀態需以櫃買/公開資訊觀測站最新資料確認。
  • 泰銘 9927 股感列為鋁鋅相關競爭對手；與寶緯產品線並非完全相同，屬廣義金屬材料同業。
  • 進口鋁模板與國內未上市鋁模板業者 鋁模板新業務的競爭來源包含海外模板供應商與國內未上市營建模板廠商；未確認具體公司名單。
Sources（16）

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.