NEW YORK, June 20, 2026, 14:04 EDT
- Amkor Technology ended the last regular session at $90.46, rising 4.7% before Nasdaq closed Friday for Juneteenth.
- Shares got a bump after TSMC signed a 10-year deal with Amkor Technology to grow advanced packaging and testing work in Arizona.
- Micron’s earnings on June 24 are in focus this week as investors look to gauge whether chip demand and the AI trade can keep their pace.
Amkor Technology (AMKR) wrapped up the holiday week with shares up 4.7%, finishing Thursday at $90.46. There was no regular session Friday due to the Nasdaq closure for Juneteenth. Trading is set to resume on Monday.
Why now? Investors are looking for U.S. names in advanced packaging, the stage after chipmaking where components get assembled and tested as a finished device. That part of the value chain is getting more attention as artificial intelligence chips have become trickier and more complex to package.
TSMC and Amkor announced a 10-year deal this week that will see TSMC buying advanced packaging and testing from Amkor in Arizona. TSMC’s Kevin Zhang said the goal is to “jointly serve our customers.” Amkor CEO Kevin Engel said the agreement pushes toward a “full U.S. supply chain.” Amkor Technology
Chip stocks rallied as the deal hit the market. The Philadelphia Semiconductor Index, or SOX, surged 6.4% Thursday. The Nasdaq Composite added 1.91%. According to Reuters, the S&P 500 finished the week up 0.93% and the Nasdaq gained 2.43% before the holiday break.
Amkor shares jumped from $82.78 at the June 12 close to $90.46 by June 18, up roughly 9.3% in the last few sessions leading into the long weekend. Trading was volatile throughout.
Amkor isn’t alone in the OSAT space. ASE Technology, Powertech Technology and JCET are also key players. What sets Amkor apart here is its Arizona capacity, right next to TSMC’s U.S. fabs.
Amkor entered the week with better results than last year. The company posted record Q1 sales of $1.68 billion, a 27% increase, and diluted earnings of 33 cents a share. For the second quarter, Amkor forecast net sales between $1.75 billion and $1.85 billion. It kept its full-year capital spending range at about $2.5 billion to $3.0 billion. Engel said the quarter saw “broad-based end market demand.” Amkor Technology
Micron is set to test the market in the week ahead. Investors are watching Micron’s June 24 report as a gauge of AI chip demand, according to Reuters. Andy Pratt, director of investment strategy at Burney Company, said there’s “a lot of momentum.” Steve Kolano at Integrated Partners called it a “classic positive feedback loop.” Reuters
But there are risks to the bull case. Amkor warned there’s no guarantee the Arizona campus will meet its projected schedule, cost, or benefits. The company’s filings also note risks from the cyclical chip market, high fixed costs, customer concentration, and short customer commitments.
Amkor isn’t trading just as a chip back-end player with better demand numbers now. Investors want in for its U.S. packaging links to TSMC’s Arizona project. That story helps the stock, but it means every new detail on timing, costs, or orders carries more weight.
