AMPX Amprius Technologies, Inc. Insider Trading

Director Donald R Dixon sold 85,000 AMPX shares at $17.17; stock down 36.0% from 52-week high, company unprofitable.

Donald R Dixon, a director at Amprius Technologies, sold 85,000 shares at $17.17 on 2026-06-15, reducing his holdings by 19.1% to 359,380 shares and generating $1,459,212.00. The transaction occurs at a significant discount to the 52-week high of $24.22, with the stock currently trading 36.0% below that peak and down 18.0% over the past 90 days. Despite impressive annual revenue growth of +202.1%, Amprius remains unprofitable with a net loss of $5,046,000.00 in its latest full fiscal year, creating tension between growth trajectory and operational losses. The director's material reduction in position at a depressed valuation level warrants investor review of whether the company's growth can be sustained or whether losses are widening relative to revenues.

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 Wen Hsuan Hsieh sold 413,146 shares at blended average $18.44; post-sale holding 44,444 shares (-90.3% reduction)

HSIEH Wen Hsuan, a Director at Amprius Technologies, executed 2 separate sales on 2026-03-12 totaling 413,146 shares for $7,620,033.19 at an average price of $18.44 per share. This represents a 90.3% reduction in holdings, leaving the Director with only 44,444 shares post-transaction. The sales occurred as the stock trades near its 52-week high of $18.59 (current price $17.95, -3.4% from peak) and on the heels of strong recent momentum (+61.6% in 30 days, +64.5% in 90 days). Against the company's fundamental backdrop—unprofitable in its most recent full fiscal year with net income of $-3,892,000.00 despite strong revenue growth of +202.1% year-over-year—a near-complete liquidation of a director's position warrants investor attention, particularly given the timing relative to recent price strength.

Director Chu Steven sold 322,197 shares at blended $18.20 for $5,863,983.95, reducing stake by 71.7% to 127,339 shares

Director Chu Steven executed four separate sales totaling 322,197 shares for $5,863,983.95, reducing his holdings from 449,536 shares to 127,339 shares (-71.7% of pre-transaction holdings). The sales occurred on 2026-03-10 and 2026-03-12 at prices ranging from $17.92 to $18.65 per share, with a blended average of $18.20, within 1.6% of the current price of $18.29. This substantial equity reduction by a board member comes during a period of significant stock appreciation (30-day change: +58.4%, 90-day change: +67.6%), while the company remains unprofitable (net income: $-3,892,000) despite strong revenue growth of +202.1% year-over-year. The scale of the disposition—eliminating nearly three-quarters of his position—warrants investor attention to understand his conviction level regarding the company's profitability trajectory at current valuations.

CTO Stefan Constantin Ionel sold 567,707 shares in 3 transactions (Jan 21–23) at blended avg $12.03 for $6,830,523.49

Stefan Constantin Ionel, Chief Technology Officer of Amprius Technologies (AMPX), executed 3 separate sales totaling 567,707 shares for $6,830,523.49 ($6.8M) at prices ranging from $12.00 to $12.04, reducing his holdings by 43.1% from 1,316,403 to 748,696 shares. The company is unprofitable (latest quarter net income: $-3,892,000.00; full-year negative) yet growing rapidly (annual revenue growth +167.0%) with a $1.5B market cap. The stock currently trades at $11.17, down 23.6% from its 52-week high of $14.61, suggesting the insider sold near cycle peaks; his cross-ticker track record shows 1 prior sell with 30-day return -9.8%, providing limited predictive context. The near-simultaneous three-day sell pattern and magnitude (567.7K shares) warrants examination of whether this reflects a specific liquidity need or strategic repositioning, particularly given the company's cash-burn profile despite strong top-line growth.

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.

CTO Stefan Constantin Ionel sold 198,255 shares (198.3K) of AMPX at $10.51, reducing stake 20.9% to 748,696 shares.

Stefan Constantin Ionel, Chief Technology Officer, executed a substantial sale of 198,255 shares on 2025-12-11, reducing his holdings by 20.9% from 946,951 shares to 748,696 shares. The transaction occurred at $10.51, a price that sits between the current market price of $10.05 and the 52-week high of $14.61, suggesting the sale was neither executed during a spike nor at a depressed level. The company's financial backdrop shows mixed signals: annual revenue growth accelerated 167.0% year-over-year, but the firm remains unprofitable with net income of $-3,892,000 in the latest quarter and negative full-year results. The stock has declined 31.2% from its 52-week high and 11.0% over the past 30 days, a period that includes this insider sale.

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.