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中華工程股份有限公司（股票代號：2515，下稱中工）19日正式委請律師向檢調單位遞狀，針對前中工法人董事（常理公司之代表人）、現任大華建設（股票代號：2530，下稱華建）、堡新投資與源通投資董事長鄭斯聰，提出違反《證券交易法》內線交易之刑事告發。中工已將相關犯罪事證全數交予檢調，呼籲主管機關徹查到底。
針對鄭斯聰涉嫌違反證券交易法之具體犯罪事實，說明如下：
一、 悉重大財務預算案利多消息
民國114年12月23日，鄭斯聰以法人董事常理公司代表人身分親自出席中工董事會，於會中確切知悉中工115年度財務預算案大幅成長之重大利多消息。該預算案明確揭露中工預期營收將較前一年成長近93億元、淨利激增逾11億元，增幅約172%，屬足以嚴重影響股價之重大未公開資訊。
二、 於禁止交易期間內違法買進（內線交易）
重大利多簡式財務預測案(損益表內容和115年度財務預算案相同)直至115年2月26日才正式對外公告，依據《證券交易法》規範，內部人於知悉重大消息後至消息正式公開後的18小時內，皆屬於絕對禁止交易期間。鄭斯聰雖於同年1月23日辭去董事職務企圖規避內部人身分規範，卻仍利用其擔任「堡新投資」與「源通投資」董事長之職務之便，在禁售期間內大舉進場買進中工股票。依主管機關公告資料顯示，甚至在2月26日預算及相關資訊發布的前一日（2月25日），堡新投資仍在持續加碼，使其持股自11.363%暴增至13.851%，源通投資亦同步由0.994%增至1.018%，違法交易罪證確鑿。
三、股票爆量異常涉嫌操縱
自鄭斯聰1月23日辭職後，中工股票之每日成交量隨即出現極度異常波動。在短短6個交易日期間，單日成交量從5,137張迅速暴增逾十倍，高達5萬5,832張，出現不合理之爆量，涉嫌人為操縱交易量與股價。
中華工程強調，為維護資本市場交易公平及廣大股東權益，對於任何踐踏法紀之行為絕對「零容忍」。本公司已正式聲請檢調向臺灣證交所函查鄭斯聰及相關投資公司之交易明細，並強烈籲請金管會、證期局、檢調單位等主管機關即刻依職權啟動調查，全面追查龐大購股金流的真正來源與相對成交情況，以揪出幕後黑手並瓦解不法犯罪結構。
BES Engineering files criminal complaint over alleged insider trading
Company accuses former board representative and PJ Group board nominee Cheng Ssu-tsung of unlawful trades and market manipulation
BES Engineering accuses Cheng Ssu-tsung of insider trading at a press conference on March 19, 2026. (BES photo)
TAIPEI (Taiwan News) — BES Engineering Corp. on Thursday filed a criminal complaint against former board representative Cheng Ssu-tsung (鄭斯聰), who is also a board candidate nominated by PJ Group in the company’s ongoing board election, alleging insider trading and potential stock price manipulation in violation of Taiwan’s Securities and Exchange Act.
The company said it submitted supporting evidence to prosecutors on Thursday and urged authorities to conduct a thorough investigation.
According to BES, Cheng, who previously served as a corporate director representative, attended a board meeting on Dec. 23, 2025, during which the board reviewed a major 2026 financial budget plan projecting significant increases in revenue and profitability.
BES stated that the plan forecast revenue growth of nearly NT$9.3 billion (US$290 million), representing year-on-year growth of nearly 45%, along with a net profit increase of more than NT$1.1 billion, representing a rise of about 172%. The company considers this material non-public information.
BES alleges that Cheng later resigned from his board position on Jan. 23, but continued trading the company’s shares during a legally restricted period through entities he chaired, including Baoxin Investment Co. and Yuantong Investment Co.
According to BES, as of Feb. 25, one day before the public announcement of the financial forecast, regulatory disclosures showed that Baoxin had increased its stake from 11.363% to 13.851%, while Yuantong had raised its holdings from 0.994% to 1.018%.
In addition to insider trading allegations, BES said trading volume in its stock surged abnormally after Cheng’s resignation. Daily turnover rose more than tenfold within six trading sessions, from 5,137 shares to as many as 55,832 shares, raising suspicions of market manipulation.
BES said it has requested investigators to obtain detailed trading records from the Taiwan Stock Exchange and called on regulators, including the Financial Supervisory Commission, to launch a full investigation into the source of funds and related transactions.
BES said it maintains “zero tolerance” for conduct that undermines market integrity and shareholder interests.
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