Weekly Winners | Palantir Stock Rockets 21%; Arista Networks Pops 18%; Apple, Micron Surge over 13%

This week, which stocks lagged or dragged? Weekly Winners column keeps up with market trends, helping Tigers sort out the week's hottest sectors, stock winners and important news.

Below are top 10 S&P 500 stock gainers for the week ended Aug 8:

Palantir Stock Rockets 21% This Week After Reporting Sales up 48%

Palantir Technologies Inc. reported a 48% increase in revenue for the second quarter to more than $1 billion, citing the “astonishing impact” of artificial intelligence technology on its business.

The data software company also raised its revenue outlook for the full year to a range of $4.14 billion to $4.15 billion, exceeding analysts’ prior expectation of $3.91 billion.

The shares gained about 9% in Tuesday's trading, hitting a record high. Denver-based Palantir has seen its stock price surge more than 500% over the past year — buoyed by high expectations from investors, growth in demand for AI tools, and a deep reach into both the private and public sectors.

Arista Networks Stock Soars 18% Amid Strong Earnings

Arista Networks has experienced a significant surge in its stock price, climbing 15.65% over the past week. This impressive movement can be attributed to the company’s strong quarterly financial results, which exceeded Wall Street expectations. Arista reported a record revenue of $2.2 billion for Q2 2025, marking a 30.4% increase from the previous year. The company’s robust performance was further bolstered by strategic advancements and a confident outlook for future growth, particularly in the AI and cloud sectors.

Analysts have responded positively to Arista Networks’ financial achievements, with several raising their price targets and maintaining Buy ratings. Notably, Needham increased its price target to $155, while Goldman Sachs and JPMorgan Chase also reiterated Buy ratings with similar targets. The company’s strategic focus on AI innovations and its strong market position have made it a key player in the AI data center boom, with major clients like Microsoft and Meta Platforms driving demand for its network switches.

Micron Soars 13% as President Trump Announced a 100% Tariff on Imported Semiconductors

Micron Technology, one of the world's foremost makers of computer memory, is climbing the charts this morning as investors try to make heads or tails of President Donald Trump's latest tariffs announcement, which slaps 100% tariffs on imported semiconductors such as those Micron manufactures abroad.

As CNBC reports, the president wants a 100% tariff on imported chips, but with caveats. "We're going to be putting a very large tariff on chips and semiconductors," Trump said. But he also said that "if you're building in the United States or have committed to build ... there will be no charge."

Apple Notches Best Week In Years After Dodging Tariff Bullet, Investment Pledge

Apple stock surged on expectations that the consumer electronics giant will be exempt from U.S. tariffs after appeasing President Trump with its hefty domestic spending plan. Shares surged over 13% for the week, marking their strongest performance since 2020.

Apple has risen for three straight trading sessions. The gains came on news that it is hiking its domestic investment in U.S. manufacturing, by $100 billion, to a total $600 billion over the next four years. Apple Chief Executive Tim Cook made the formal announcement at the White House with President Donald Trump late Wednesday.

"Apple's stock has reacted nicely to tariff news, but we see focus starting to move toward new products and systematic increases in value for iPhones that drives growth for the next 3+ years," Melius Research analyst Ben Reitzes said in a client note Friday.