We know about Druckenmiller’s investing activities because no later than 45 days into every quarter, any fund that manages more than $100 million in assets has to file a Form 13-F with the SEC.\u00a0That form details the fund’s holdings as of the end of the prior quarter. This gives the public a snapshot of how these funds’ portfolios are changing from quarter to quarter. <\/p>\n If you’re looking at a fund that trades frequently in and out of positions from day to day or week to week, then this information is useless. However, when you’re looking at the portfolios of fund managers who take a longer-term approach, it can be a useful tool. <\/p>\n Druckenmiller is one of the more successful long-term investors that I follow, and his fund reducing its Sandisk stake in Q2 makes a ton of sense, because the stock went on a major run to start the year. Taking some gains off the table after such a run-up is a prudent investing move. <\/p>\n However, the minor trim to his Sandisk position was outweighed by the amount he deployed to load up on shares of Taiwan Semiconductor, Alphabet, and Amazon, and those buys are what investors should be more focused on. <\/p>\n These three are no-brainer winners in the AI arms race <\/p>\n Taiwan Semiconductor, Alphabet, and Amazon all have one thing in common: They are clear winners from the AI infrastructure build-out. Taiwan Semiconductor is the most obvious, as more AI computing will require more chips. Taiwan Semiconductor is the largest logic chip producer<\/a> on Earth by a wide margin, and as long as there is increased AI spending, TSMC will continue to be a winning investment. Druckenmiller increased the fund’s stake in TSMC by 19% in Q2, making it Duquesne’s second-largest holding. <\/p>\n Amazon and Alphabet are in similar boats, even if their primary businesses are different. From an AI standpoint, they are both benefiting from the AI arms race via their cloud computing divisions<\/a>, which are helping meet the huge demand for processing power to run AI workloads. Both plan to spend at least $200 billion on capital expenditures this year, primarily to build and equip new data centers. That’s a ton of money being invested, and it shows how much computing demand there is. As these two hyperscalers bring more computing power online, their cloud revenues will expand, allowing them to post rapid growth with high profitability. <\/p>\n That makes Amazon and Alphabet smart stocks to invest in now, because the growth that will derive from their massive investments this year (and next year as well) hasn’t started impacting their finances yet. Druckenmiller knows this, which explains why he dramatically increased his firm’s Amazon stake in Q2. It now occupies a nearly 3% position in its portfolio. Alphabet was a new addition to the Duquesne Family Office portfolio, and makes up a slightly smaller position at 2.75%. <\/p>\n Given that the bulk of the effects from the latest round of AI build-outs are still not being felt by these three, they have plenty more room for upside. <\/p>\n Should you buy stock in Alphabet right now? <\/p>\n Before you buy stock in\u00a0Alphabet, consider this: <\/p>\n The Motley Fool\u00a0Stock Advisor\u00a0analyst team just identified what they believe are the\u00a010 best stocks<\/a>\u00a0for investors to buy now\u2026 and\u00a0Alphabet\u00a0wasn’t one of them.\u00a0The 10 stocks that made the cut are built for long-term growth and could produce monster returns in the coming years. <\/p>\n Consider when\u00a0Netflix\u00a0made this list on December 17, 2004… if you invested $1,000 at the time of our recommendation,\u00a0you’d have $429,223!*\u00a0Or\u00a0when\u00a0Nvidia\u00a0made this list on April 15, 2005… if you invested $1,000 at the time of our recommendation,\u00a0you’d have $1,318,055!* <\/p>\n That performance is why people listen. With a track record of\u00a0beating the S&P 500 by nearly 5x,\u00a0Stock Advisor\u00a0offers a distinct advantage. Don’t miss the latest top 10 list, available with\u00a0Stock Advisor, and join an investing community built for the long haul. <\/p>\n See the 10 stocks \u00bb<\/a> <\/p>\n *Stock Advisor returns as of August 22, 2026. <\/p>\n Keithen Drury<\/a> has positions in Alphabet, Amazon, and Taiwan Semiconductor Manufacturing. The Motley Fool has positions in and recommends Alphabet, Amazon, and Taiwan Semiconductor Manufacturing. The Motley Fool has a disclosure policy<\/a>. <\/p>\n<\/a> Image source: Getty Images. Was selling Sandisk a good idea? <\/p>\n