KOS Insider Margin Call: Kosy Deputy CEO's 309,400 Shares Force-Sold

Overview

Capital Securities has notified the market that it will force-sell 309,400 KOS shares owned by Nguyen Thi Phuong Thao, Deputy CEO of Kosy (HOSE: KOS), under a margin call. The sale is scheduled to begin on 22/9/2026 and may continue until the client restores the required margin ratio or repays all outstanding debt to the broker. The disclosure lands as KOS shares hit the floor, falling nearly 7% to VND 26,000 in the session referenced by the filing.

Key Facts

• Capital Securities (CTCK Capital) announced a forced margin sale of 309,400 KOS shares.
• The shares belong to Nguyen Thi Phuong Thao, Deputy CEO of Kosy in charge of the Northwest region, born 1978.
• Thao holds 7.225 million KOS shares, equal to 3.34% of the company’s capital, per the H1 2026 governance report.
• The forced sale is expected to start on 22/9/2026 and may extend until the margin ratio is restored or all debts are settled.
• KOS fell to the floor, down nearly 7%, to VND 26,000 per share in the session cited by the article.
• KOS closed at VND 27,950 on 21/9/2026, per the price-context block.
• H1 2026 consolidated revenue reached VND 723 billion, up 9% year on year, with after-tax profit of approximately VND 15 billion, up 50%.

What Happened

Capital Securities issued a public notice that it intends to liquidate a margin position held by an insider and related person of an insider at Kosy Corporation. The broker identified the account holder as Nguyen Thi Phuong Thao, Deputy CEO of Kosy, and set the start of the forced sale at 22/9/2026. Under the notice, the sale can continue until the client satisfies Capital Securities’ required margin ratio or clears the full outstanding loan balance.

The margin call follows a sharp decline in KOS. The article states the stock fell to the floor, down almost 7%, to VND 26,000 per share, a move that eroded the collateral value behind the leveraged position. The filing does not disclose the size of the loan, the margin ratio at the time of the call, or the price at which the shares will be sold. The article also does not state whether Thao has added cash or collateral to cure the margin shortfall.

Market Context

KOS trades on the Ho Chi Minh City Stock Exchange (HOSE) in the real estate sector. The price-context block shows a close of VND 27,950 on 21/9/2026, while the article cites a floor-price session at VND 26,000, indicating a rapid, high-volatility move in the days around the disclosure. Forced selling by a broker is a mechanical, price-insensitive flow: it adds supply regardless of fundamentals and can pressure the order book further if the position is large relative to daily liquidity. The event also fits a broader pattern in the Vietnamese market where leveraged insider accounts at securities firms become visible during sharp single-stock drawdowns, particularly in real estate names sensitive to credit conditions.

Strategic Significance

For long-term holders, the key issue is not the 309,400 shares themselves, which represent a small fraction of Thao’s 7.225 million-share holding, but what the margin call signals about leverage inside the Kosy ownership structure. A Deputy CEO being forced to sell at floor prices suggests the insider’s personal balance sheet, not necessarily the company’s, is under stress. That distinction matters: Kosy’s H1 2026 results show revenue of VND 723 billion, up 9%, and after-tax profit of about VND 15 billion, up 50%, so the operating trend is improving even as the share price weakens. Investors should weigh whether further forced sales by insiders or related parties could follow, since additional margin calls would create repeated, unpredictable supply overhangs that can cap any fundamental re-rating.

What to Watch

• Whether Capital Securities completes the 309,400-share sale and at what average price, via subsequent disclosure.
• Any additional margin-call notices involving Thao or other Kosy insiders and related persons.
• KOS trading volume and whether the stock holds above the VND 26,000 floor level in the sessions after 22/9/2026.
• Kosy’s Q3 2026 earnings release for confirmation of the H1 revenue and profit trend.
• Any insider registration to buy or sell KOS shares filed with HOSE after the forced-sale period ends.