Kang Sun

Director Kang Sun sold 67,796 shares of AMPX at $14.79; stock now $17.83, down 13.7% in 30 days despite +61.2% 90-day surge.

Kang Sun sold 67,796 shares (67.8K shares) on 2026-05-21 at $14.79, reducing his holdings by 5.0% to 1,280,854 shares (1.28M shares). The stock has since risen to $17.83, placing the transaction 21.8% below the 52-week high. At the same-ticker level, his prior 5 trades at AMPX showed 3 of 5 were well-timed at the 90-day mark, suggesting contextual skill in identifying downturns, though this sale occurred during a period of strong recent momentum (90-day change: +61.2%) following a recent 13.7% decline over 30 days. The company reported $28.5M in quarterly revenue with annual growth of +202.1%, but remains unprofitable (net loss $5.0M in the latest quarter). The sale leaves substantial remaining exposure (1.28M shares still held), indicating continued conviction despite the transaction.

Director Sun Kang sold 1,500,000 shares (1.50M) for $23,860,713.76 at Amprius (AMPX), reducing stake by -52.8%.

Sun Kang, a Director at Amprius Technologies, executed 2 separate sales totaling 1,500,000 shares for $23,860,713.76 on 2026-04-01, reducing his holdings from 2,842,400 to 1,342,400 shares (-52.8% vs pre-transaction holdings). The blended average price of $15.91 occurred while the stock trades at $16.00 (current price), within 17.4% of its 52-week high of $19.38, and substantially above the 52-week low of $2.07. The company posted $21,426,000.00 in latest quarterly revenue (+202.1% annual growth) but recorded net income of $-3,892,000.00, indicating continued operating losses despite rapid topline expansion. Kang's cross-ticker track record shows 7 prior open-market sells with a 90-day well-timed rate of 50.00%, and at AMPX specifically his prior 4 measurable same-ticker sales posted mixed timing, with outcomes ranging from -9.9% to +10.0% over 30 days post-sale. The absence of any 90-day measurable outcomes on his same-ticker history limits visibility into whether this stock's recent 83.1% gain over 90 days follows a pattern established by his prior insider activity.

Director Sun Kang sells 217,869 shares at avg $18.80 for $4.1M, retaining 56,406 shares; AMPX stock up 86.6% in 30 days after trailing decline.

Sun Kang, a Director at Amprius Technologies (AMPX), executed 2 separate sales totaling 217,869 shares for $4,095,401.63 at a blended average price of $18.80 on 2026-03-23, reducing his holdings by 79.4% from 274,275 shares to 56,406 shares. The timing is notable: the insider sold near the 52-week high of $19.38 (just -8.4% away), yet the stock has rallied +86.6% over the prior 30 days and +108.2% over 90 days, suggesting the sale occurred after substantial recent momentum rather than in anticipation of a decline. His same-ticker history at AMPX shows mixed predictiveness—among 5 prior sales, only 1 of 2 measurable 90-day outcomes were well-timed (negative return post-sale), with recent January sales showing both gains (+10.0% at 30 days) and losses (-9.9% at 30 days). The company remains unprofitable (net income of -$3.9M in the latest quarter), though it is growing revenue rapidly (+202.1% year-over-year), a contrast that leaves the fundamental picture ambiguous. The large scale of this transaction—reducing a director's stake by nearly four-fifths—combined with the lack of a clear directional signal from his prior trading record at this ticker, makes this a material filing warranting investor attention.

Director Sun Kang sold 993,733 shares ($11.0M) across 2 transactions; holdings reduced 41.5% to 1,403,651 shares.

Sun Kang, a Director, executed two separate sales totaling 993,733 shares for $10,994,943.52 at a blended average price of $11.06, reducing his holdings by 41.5% from 2,397,384 to 1,403,651 shares. The sales occurred on 2026-01-16 and 2026-01-20, slightly above current market price of $11.17 but well below the 52-week high of $14.61. Amprius is growing revenue at +167.0% annually but remains unprofitable with quarterly revenue of $21.4M and net income of -$3.9M. Against his cross-ticker track record of 3 prior sells averaging -12.2% 30-day returns, his prior sales at this specific ticker have not yet demonstrated a measurable 90-day pattern (most recent comparable 30-day returns were -7.2% and -17.1%), making the directional signal from this large position reduction difficult to conclusively classify without additional context on the seller's reasoning.

AMPX director Sun Kang sold 506,267 shares for $5.1M; stock now 29.1% below 52-week high amid unprofitable operations.

Director Sun Kang sold 506,267 shares (26.5% of pre-transaction holdings) at $10.10, reducing his stake from 1.91M to 1.40M shares. The sale occurred when the stock trades at $10.36, down 29.1% from its 52-week high of $14.61, and while the company reported $21.4M in quarterly revenue and negative $3.9M net income with 167.0% annual revenue growth, it remains unprofitable on a full-year basis. Kang's two prior trades at AMPX (November 2025 sales) both showed negative 30-day returns of -7.2% and -17.1%, suggesting a pattern of selling into or ahead of weakness. The cross-ticker track record shows an average 30-day return of -12.2% following his prior two open-market sales, indicating his past sale decisions have typically preceded near-term declines.

CEO Sun Kang sold 68,655 shares of AMPX at $10.08 on 2025-11-21 for $692,131.65; stock now at $10.73, down 26.6% from 52-week high.

CEO Sun Kang sold 68,655 shares (4.7% of pre-transaction holdings) for a total value of $692,131.65, reducing his stake from 1,472,306 shares to 1,403,651 shares. The sale occurred at $10.08, and the stock has since recovered modestly to $10.73 (current), though it remains well below its 52-week high of $14.61. This is Kang's second consecutive sale at AMPX within five days (following a sell on 2025-11-17), and across his entire open-market history, he has executed only 1 prior sell transaction total, making this pattern of sequential dispositions noteworthy. The company reported a net loss of $3,892,000 in its latest quarter and remains unprofitable on a full-year basis, despite strong revenue growth of 167.0% year-over-year and a market capitalization of $1.4B—a backdrop of expansion amid continued operational losses.

CEO Sun Kang sells 1,000,000 shares (1.00M shares) of AMPX at $10.60; holdings drop 40.4% to 1,472,306 shares (1.47M shares).

CEO Sun Kang divested 1,000,000 shares (1.00M shares) at $10.60 on 2025-11-17, reducing his holdings by 40.4% from 2,472,306 shares (2.47M shares) to 1,472,306 shares (1.47M shares). The sale occurred near the 52-week high ($14.61), with current price $10.81 now -26.0% from that peak and -20.1% over the past 30 days. Amprius is growing revenue at +167.0% year-over-year but remains unprofitable with a -$3,892,000.00 ($-3.9M) net loss in the latest quarter and negative full-year net income. A CEO sale of this magnitude—reducing holdings by over two-fifths—during a period of sharp recent price decline and sustained operating losses warrants investor scrutiny of capital allocation priorities and insider conviction in the company's near-term trajectory.