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KLIC KULICKE & SOFFA INDUSTRIES INC Insider Trading

Latest: Interim CEO and CFO Sold $7.3M of Shares · Jun 2026

Multiple insiders have been active at KULICKE & SOFFA INDUSTRIES INC (KLIC): 7 distinct insiders account for 0 buy filings and 14 sell filings as of Jun 2026. Its highest-significance filing in the last 90 days: Interim CEO and CFO Lester A Wong sold $7.3M, transaction dated Jun 2026.

14 filings analyzed · Latest 2026-06-22

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Buys
0
Sells
14
Insiders
7
Direction
Net selling

KULICKE & SOFFA INDUSTRIES INC leadership

CEO
Lester Wong — Chief Executive Officer
CFO
Lester Wong — Executive Vice President, Finance and IT and Chief Financial Officer
General Counsel
Zi Yao Lim — Vice President, Legal Affairs and General Counsel and Corporate Secretary
Chair
Peter T. Kong — Chairman

Historically, stocks have lagged the S&P 500 by a median ~4% over the 90 days after a high insider sell (n ≈ 3,996, 2024-2026). Past results don't predict the future. How we measure this ↗

June 2026
2026-06-22
high
Interim CEO and CFO
60,000 shares
$7,302,552
@ $121.71
Significance 7

Interim CEO/CFO Lester A Wong sold 60,000 KLIC shares at $121.71 for $7.3M, reducing holdings 54.2%

Lester A Wong, serving as both Interim CEO and CFO, executed a substantial open-market sale on 2026-06-18, liquidating 60,000 shares (54.2% of his pre-transaction holdings) at $121.71 per share. The stock's current price of $123.15 is only 1.6% below the 52-week high of $125.14, suggesting the sale occurred near peak valuation. Notably, Wong's prior trades at KLIC show a 2-of-2 pattern of well-timed sells at the 90-day mark (prior sales on 2024-11-20 and 2023-12-14 both resulted in negative 90-day returns), indicating a consistent ability to exit before downturns. Against the backdrop of flat-to-negative annual revenue growth (-7.4%) and an exceptionally elevated P/E ratio of 30787.50, this large reduction in executive stakes by the sitting interim CEO warrants investor attention to whether fundamental risks are being reflected in the market valuation.

2026-06-15
medium
Senior Vice President
15,000 shares
$1,705,788
@ $113.72
Significance 4

SVP Nelson Munpun Wong sold 15,000 KLIC shares at $113.72 for $1.7M; holdings fell 17.4% to 71.4K shares.

Nelson Munpun Wong sold 15,000 shares (15.0K shares) at $113.72 on 2026-06-12, reducing his holdings from 86.4K to 71.4K shares (-17.4%). The stock has since traded to $116.16, putting the sale just 1.5% from the 52-week high of $117.96. Reviewing Wong's same-ticker history at KLIC, his prior 5 sales have produced mixed results: only 2 of those 5 sales were well-timed at the 90-day mark (40% win rate), with some prior sales followed by gains ranging from +0.8% to +53.8% over 30 days. The current fundamentals show revenue of $242,621,000.00 and net income of $35,148,000.00, though annual revenue growth is -7.4% and the P/E of 29040.00 reflects significant earnings pressure. The transaction occurs in a strong price environment—stock up +13.8% over 30 days and +75.0% over 90 days—yet involves a moderate-sized reduction of a still-substantial remaining position, leaving room to assess whether this signals portfolio management rather than distress.

May 2026
2026-05-21
medium
20,000 shares
$2,000,000
@ $100.00
Significance 4

Director Mui Sung Yeo sold 20,000 shares of KLIC at $100.00 on 2026-05-20, reducing holdings by 25.3%

Director Mui Sung Yeo executed a $2,000,000.00 open-market sale of 20,000 shares at $100.00, reducing his position from 79,197 shares to 59,197 shares (a -25.3% reduction). The stock currently trades at $101.09, near its 52-week high of $107.01, and has gained 20.5% over 30 days and 42.7% over 90 days. His prior sale at this ticker on 2026-02-13 was followed by a 90-day return of +44.6%, indicating that sale was poorly timed as the stock rose afterward. Across his broader open-market history, his timing on sells has been uniformly unsuccessful (0.00% well-timed rate), with prior sales followed by an average 90-day return of +44.6%. The current sale occurs at elevated valuations (P/E 25272.50) and in a period of strong near-term momentum.

February 2026
2026-02-17
medium
19,143 shares
$1,377,974
@ $71.98
Significance 4

Director Yeo Mui Sung sells 19,143 shares of KLIC at $71.98, reducing stake to 78,522 shares (-19.6%)

Yeo Mui Sung sold 19,143 shares at $71.98, a price approximately 0.2% above the current market price of $71.77 and near the 52-week high of $74.87. The stock has gained 24.7% over the past 30 days and 103.4% over the past 90 days, placing the transaction in a strong uptrend. The sale reduced the director's holdings by 19.6%, a material reduction in personal stake. The company is trading at an elevated P/E of 17942.50, though this appears driven by depressed earnings rather than valuation exuberance, with net income at $16.8M on $199.6M in quarterly revenue and annual revenue declining 7.4% year-over-year. The transaction occurs after significant recent gains and does not appear driven by a scheduled 10b5-1 plan.

2026-02-11
medium
Senior Vice President
7,098 shares
$520,116
@ $73.28
Significance 5

Senior VP Chylak sells 7.1K KLIC shares at $73.28; stock at 52-wk high; 90d prior sale well-timed

Chylak sold 7,098 shares for $520,115.89, reducing holdings by 23.6% to 22,987 shares. The sale occurred at $73.28, just below the current price of $74.87, which sits at the 52-week high of $74.87; the stock has gained 32.9% in 30 days and 99.0% in 90 days. Notably, Chylak's prior sale at KLIC on 2024-12-09 achieved a 90-day return of -23.2%, placing it within his cross-ticker track record of 100% well-timed sells (1 of 1 prior sells were well-timed at the 90-day mark). However, this sell executes near the peak of the recent rally, with no scheduled trading plan FLAG noted, leaving the timing relative to current momentum as a potential signal worth monitoring.

2026-02-09 10b5-1 Plan
medium
Senior Vice President
39,800 shares
$2,426,837
@ $60.98
Significance 5

SVP Nelson Wong sold 39.8K KLIC shares at $60.98; stock now at $72.92, up 31.7% in 30 days.

Nelson Wong, Senior Vice President, sold 39,800 shares of KULICKE & SOFFA INDUSTRIES INC at $60.98 on 2026-02-05, reducing his holdings by 31.5% from 126,169 to 86,369 shares. The sale occurs while the stock trades at $72.92 current price, representing significant divergence: the stock has risen 31.7% over the prior 30 days and 88.7% over 90 days, but the sale was executed at a price 16.4% below the 52-week high of $72.92 — suggesting the insider sold ahead of recent momentum. Examining prior KLIC-specific trades, Wong achieved negative 90-day returns (well-timed) in 2 of 3 measurable prior sells at this ticker; his cross-ticker track record shows a 66.67% well-timed rate on sells, indicating a historical pattern of selling before subsequent declines. The current sale occurs in a stock showing strong recent price appreciation, with annual revenue declining 7.4% year-over-year despite near-term share price strength, warranting observation of whether this sell precedes a reversal of recent gains.

January 2026
2026-01-14 10b5-1 Plan
medium
Senior Vice President
30,000 shares
$1,695,780
@ $56.53
Significance 5

SVP Nelson Wong sells 30,000 KLIC shares at $56.53 (52-week high); stock up 42.2% in 90 days, 18.2% in 30 days

Nelson Wong, Senior Vice President, sold 30,000 shares (19.2% of his pre-transaction holdings of 156.4K shares) at $56.53 on 2026-01-12, bringing his holdings to 126.4K shares. The sale occurred at the 52-week high (+0.0% from peak), after the stock has appreciated 42.2% over the prior 90 days and 18.2% over the prior 30 days. At KLIC specifically, Wong's three prior open-market sales (2025-08-12, 2024-11-21, 2023-12-01) show mixed timing: two of three were well-timed at the 90-day horizon. The broader cross-ticker track record across three prior sales shows an average 90d return of -3.8% with a 66.67% well-timed rate. Meanwhile, KLIC's fundamentals show contraction: net income of $-3.3M (latest quarter), annual revenue decline of -7.4%, and a elevated P/E of 39.26 against a market cap of $3.0B. The sale at peak valuation amid operational headwinds and significant recent appreciation warrants tracking of subsequent price action relative to these historical patterns.

August 2025
2025-08-14
high
Senior Vice President
30,000 shares
$1,111,971
@ $37.07
Significance 6

Senior VP Wong sells 30,000 KLIC shares at $37.07; unprofitable company with -4.9% annual revenue decline

Senior Vice President Nelson Munpun Wong sold 30,000 shares of Kulicke & Soffa Industries (KLIC) at $37.07 on 2025-08-12, reducing his holdings from 177,533 to 147,533 shares. The timing aligns with KLIC's challenging fundamentals: the company reported negative net income of $-3,289,000.00 over its most recent full fiscal year and posted an annual revenue decline of -4.9%. The current stock price of $37.40 is -26.0% from the 52-week high of $50.54, suggesting recent deterioration from higher valuations. Wong's cross-ticker track record shows a 100.00% well-timed sell rate across prior trades, and his two previous KLIC sales (2024-11-21 and 2023-12-01) both registered negative 90-day returns, indicating he has historically exited this stock ahead of declines. This sale occurs in an environment where the company trades at a P/E of 340.00, reflecting compressed profitability relative to market valuation.

December 2024
2024-12-10
medium
30,000 shares
$1,443,306
@ $48.11
Significance 6

Director Lim Chin Hu sold 30,000 shares of KLIC at $48.11 (12/6/24), reducing holdings to 59,701 shares amid -4.9% annual revenue decline and full-year losses.

Lim Chin Hu sold 30,000 shares, representing a -33.4% reduction in his stated holdings, at a price $0.73 below the current market price of $48.84. The timing follows a strong 90-day rally of +23.3% from which the stock has since declined 12.6% from its 52-week high of $55.85. The company has faced headwinds: annual revenue contracted -4.9% year-over-year, and the firm reported a negative full-year net income in its most recent fiscal year despite posting $12.3M in latest quarterly net income. This sale by a director coincides with operational challenges and follows substantial near-term price appreciation, but the current stock price remains below the transaction execution point, making post-sale performance assessment uncertain.

2024-12-10
high
Senior Vice President
11,391 shares
$564,121
@ $49.52
Significance 6

SVP Robert Nestor sold 11,391 shares of KLIC at $49.52, reducing holdings 35.3%; firm posted negative full-year net income.

Robert Nestor, Senior Vice President, sold 11,391 shares at $49.52 on 2024-12-09, reducing his holdings from 32,229 shares to 20,838 shares—a 35.3% reduction. The transaction occurs in a context of concerning financial fundamentals: the company was unprofitable over its most recent full fiscal year, and year-over-year annual revenue declined 4.9% to $181.6M. While the latest quarter showed $12.3M in net income, this masks the full-year loss. The stock is trading -12.6% below its 52-week high of $55.85, having risen 23.3% over the past 90 days—near the top of its recent range. This sale by a senior executive of a material portion of holdings warrants investor review of management's forward outlook.

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