AMKR AMKOR TECHNOLOGY, INC. Insider Trading

Director Tily Gil C. sells 15,000 AMKR shares for $1.16M as stock rallies sharply from lows

Director Tily Gil C. divested roughly 12% of her holdings in a single open-market sale as AMKR shares climbed steeply over the past quarter, recovering from weakness to trade modestly below their 52-week high. The company is profitable with consistent revenue growth and a large market footprint, but trades at a stretched valuation. This is the director's first open-market sale at AMKR in the filing window, following a track record of regular share dispositions across her broader portfolio. The timing—selling into strength after a significant rally—is a common pattern for insiders managing concentrated positions, though without prior purchase price data, the profit motive cannot be confirmed from the filing alone. The sale itself does not suggest financial distress, but it does represent meaningful reduction in her ownership stake during a period of rising stock price momentum.

Director Rutten sells 50,000 shares of Amkor as stock rallies; mixed prior timing at this ticker.

Rutten Guillaume Marie Jean, a board member at Amkor, sold a significant stake on a day when the stock was trading near its 52-week high after a substantial recent rally. This marks his 18th open-market sale in the past three years, continuing a pattern of consistent liquidation with no offsetting open-market purchases during that window. His prior sales at Amkor show conflicting timing results: over a longer three-month horizon, all five prior exits preceded declines in the stock, suggesting solid exit timing on a longer timeframe; however, over the near term, those sales were mixed, with two preceding immediate gains in the stock. The company itself is profitable and growing rapidly, which could suggest Rutten is selling a fundamentally sound business rather than bailing out of a deteriorating situation. His persistent selling activity regardless of company performance or price level may reflect portfolio management or liquidity decisions unrelated to views on the business itself.

Director Carolin Roger Anthony exercised and sold shares on same day; stock near 52-week high after sharp recent rally.

On May 5, 2026, director Carolin Roger Anthony acquired shares through exercise and immediately sold the same quantity in a single-day transaction. The sale generated proceeds of approximately $1.52 million at prices well aligned with the stock's current trading level near its 52-week high, following a sharp rally over the prior quarter. Amkor is a profitable chipmaking services company with strong recent revenue growth and expanding earnings. The paired acquire-and-sell structure—exercised shares sold the same day—is characteristic of a net-neutral equity conversion, where the proceeds offset the exercise cost and eliminate stock-price risk exposure. This pattern is routine for directors managing equity compensation and does not signal any particular conviction about the company's near-term outlook.

AMKR CEO Kevin K. Engel sold 12,500 shares at $48.75 on 2026-02-24; holds 2,953 shares post-transaction, down 80.9%

Kevin K. Engel, the President and CEO of AMKOR TECHNOLOGY, executed a substantial sale of 12,500 shares at $48.75, reducing his shareholding from 15,453 shares to 2,953 shares—an 80.9% reduction in position size. The trade occurred at a price near the 52-week midpoint and 13.6% below the recent 52-week high of $56.17. Engel's same-ticker history at AMKR shows one prior sale on 2025-12-12 that posted a 30-day return of +13.2%, providing limited insight into this insider's typical timing acuity at this specific stock. The company's fundamentals remain solid with $2.0B in quarterly revenue, $126.6M in net income, and annual revenue growth of 6.2%, though the elevated P/E of 36.76 reflects high market expectations. This material reduction in the CEO's ownership stake warrants monitoring, though the absence of a scheduled trading plan notation and lack of broader insider activity limits the broader narrative inference.

EVP Haghighi sells 15,624 shares (65.2% of holdings) at $50.50; stock now at $48.52, -13.6% from 52-week high.

Haghighi sold a substantial portion of his AMKR stake—15,624 shares (15.6K shares)—representing a 65.2% reduction in his holdings from 23,978 shares to 8,354 shares. The sale occurred at $50.50 per share, yielding $789,012.00 in proceeds, while the current market price of $48.52 is 13.6% below the 52-week high of $56.17. The stock has rallied 33.3% over the past 90 days and is up 6.2% in annual revenue growth, yet this substantial insider reduction came as AMKR trades at a P/E of 36.76—elevated relative to its growth rate. The timing and magnitude of the sale warrants attention given the executive's material reduction in personal exposure.

KIM JOHN T, 10% owner, sold 10,000,000 shares of AMKR at $48.49 ($484.9M) on 2026-02-12, reducing stake from 39.59M to 29.59M.

A 10% owner executed a substantial $484.9M sale, offloading 10,000,000 shares (-25.3% of his pre-transaction holdings) at $48.49 per share. The stock has since declined 16.6% from its 52-week high of $56.17 and currently trades at $46.84, suggesting the sale occurred near a relative peak. Across his prior same-ticker activity at AMKR, the insider bought on 2025-08-01 (which delivered a 90d return of +46.1%) and bought on 2025-02-24 (which returned -16.4% over 90 days), showing mixed precision in past entries. The company's fundamentals remain challenged: annual revenue contracted -2.8% year-over-year and the P/E ratio stands at 37.47, suggesting limited margin of safety at current valuations despite recent momentum (90-day gain of +49.0%). A substantial reduction in a major shareholder's stake, combined with moderating near-term price action post-sale, warrants close attention to whether this signals a shift in insider sentiment or portfolio positioning at AMKR.

915 Investments, LP sold 10,000,000 shares of AMKR for $484.9M on 2026-02-12; holdings reduced 25.3% to 29.59M shares

915 Investments, LP executed a substantial open-market sale of 10,000,000 shares at $48.49, reducing its AMKR stake by 25.3% from 39.59M to 29.59M shares. The sale occurred near the 52-week high of $56.17 (current price $46.84 is -16.6% from that peak), yet the prior trade at this ticker on 2023-09-06 showed a 90-day return of +21.2%, indicating the insider's prior sell did not precede a material decline. Across the insider's full cross-ticker history, the 90d well-timed rate is 0.00%, meaning prior sells have consistently been followed by positive returns rather than declines. The sale magnitude and timing relative to AMKR's current price action (down 2.4% over 30 days despite strong 90-day gains of 49.0%) merit investor scrutiny given the company's mixed fundamentals—flat revenue growth (Annual FY revenue growth -2.8%), elevated P/E of 37.47, and the insider's historical pattern of selling into strength rather than ahead of weakness.

EVP & General Counsel Mark N Rogers sold 20,000 AMKR shares at $42.95, reducing holdings by 45.6% to 23,862 shares; stock now down 17.4% from 52-week high despite 25.8% 30-day gain.

Mark N Rogers, EVP & General Counsel of Amkor Technology, divested 20,000 shares (45.6% of his pre-transaction holdings) at $42.95 on 2025-12-16, raising $859,000.00. The timing is noteworthy: the sale occurred near the 52-week high but stock has since declined 17.4% from that peak, suggesting the sale preceded weakness. Rogers' cross-ticker track record shows 1 prior sell with a +22.7% 30-day return (poorly timed for that prior trade), and at AMKR specifically, he sold on 2025-11-17 with a 30-day return of +22.7%. The current valuation context—P/E of 31.10 and annual revenue decline of -2.8%—may warrant attention relative to the magnitude of the reduction in his holdings.

EVP & General Counsel MARK N ROGERS sold 20,000 shares of AMKR at $31.69; holdings reduced to 23,862 shares.

MARK N ROGERS, EVP & General Counsel, liquidated 20,000 shares (45.6% of pre-transaction holdings) at $31.69 per share on 2025-11-17, reducing his equity stake from 43,862 to 23,862 shares. The sale occurred at a price $0.26 above the current market price of $31.43, though the stock remains 16.9% below its 52-week high of $37.84 and has gained 35.4% over the past 90 days. Amkor is trading at a P/E of 25.14 with annual revenue decline of 2.8% year-over-year, despite quarterly revenue of $2.0B and net income of $126.6M. The substantial reduction in the executive's holdings—cutting his position by nearly half—combined with the company's recent 90-day gains and elevated valuation multiple merits investor review of the transaction's context and timing.

SUJODA Investments buys 441,589 shares of AMKR at $21.85; cluster activity includes 4 other insiders in past 14 days.

SUJODA Investments purchased 441,589 shares at $21.85 on 2025-08-01, increasing holdings to 3,789,479 shares (a 13.2% increase). The current price of $22.17 represents a modest gain from the transaction price, though the stock remains 33.6% below its 52-week high of $33.37. Notably, this transaction is part of a cluster pattern with 4 other insiders buying within the past 14 days, which may indicate collective reassessment by the leadership group. However, the insider's cross-ticker track record shows negative average returns (avg 30d return -11.4%, avg 90d return -16.4%), and the prior buy at this same ticker in February 2025 also underperformed (30d -11.4%, 90d -16.4%), suggesting limited predictive value from historical timing patterns.