Billionaire David Tepper Cut Micron 41% and Kept Buying This AI Chip Stock for a Sixth Quarter

Billionaire David Tepper Cut Micron 41% and Kept Buying This AI Chip Stock for a Sixth Quarter Habib Ur Rehman Thu, September 3, 2026 at 12:01 AM GMT+2 3 min read MU TSM TSM Billionaire David Tepper used the second quarter to make a striking trade within the AI hardware chain. Appaloosa Management cut its Micron Technology, Inc. (NASDAQ: MU ) share count by 41.

4%, while increasing Taiwan Semiconductor Manufacturing Company Limited (NYSE: TSM ) for a sixth consecutive quarter. The filing does not disclose Tepper's rationale. The positions instead contrast a cyclical HBM supplier with a diversified advanced foundry serving nearly every major chip designer.

That makes the comparison about earnings durability as much as exposure to total AI demand. George Soros Increased Micron Nearly Eightfold. Is AI Memory Still the Best Contrarian Chip Trade?

Charles Knowles / Shutterstock. com Micron Technology, Inc. (NASDAQ:MU) has a powerful rebuttal.

It reported record fiscal third-quarter results as high-bandwidth memory became critical to AI accelerators. HBM requires more capacity and technical sophistication than conventional memory, potentially supporting stronger pricing and margins. If supply remains disciplined while demand expands, Micron's cycle may be structurally better than the old commodity pattern.

The bear case is its planned capital spending of more than $25 billion and the possibility that today's shortages invite too much future supply. Taiwan Semiconductor Manufacturing Company Limited (NYSE:TSM) offers a broader toll-road thesis. Its second-quarter gross margin reached 67.

7%, and the ongoing 2-nanometer ramp can deepen its lead in advanced manufacturing. It benefits whether customers favor Nvidia, AMD, custom accelerators, or other designs. However, that dominance brings enormous fabrication costs, customer concentration, geopolitical exposure, and the difficulty of maintaining exceptional margins while new capacity comes online.

The two holdings do not necessarily predict weaker AI demand. They simply provide two different ways to monetize it. Micron has greater operating leverage if HBM prices stay tight, but Taiwan Semiconductor has more diversified exposure across the entire computing stack.

The first offers a sharper cyclical upside; the second offers a more durable platform with risks investors cannot ignore. That tradeoff explains why reducing one position need not invalidate its thesis. Broader hedge-fund activity increased in both.

Micron ownership jumped to 184 funds in the second quarter from 154, while Taiwan Semiconductor ownership increased to 249 funds from 234. AQR Capital Management reduced its Micron stake 16% but retained 3. 8 million shares, while Fisher Asset Management raised its Taiwan Semiconductor position 2% to 18.

9 million shares. As of August 14, 30 million Micron shares were sold short, 2. 66% of the float and only 0.

9 days of average volume. Institutional participation increased in both names, while Micron's days-to-cover reading showed limited mechanical short-covering pressure. Neither tells us why Tepper made the trade.

Story Continues While we acknowledge the potential of MU and TSM as investments, we believe certain other AI stocks offer greater upside potential and carry less downside risk. If you're looking for an extremely undervalued AI stock that also stands to benefit significantly from Trump-era tariffs and the onshoring trend, see our free report on the best short-term AI stock . READ NEXT: NVIDIA (NVDA): What Foxconn and Super Micro Are Telling Us about the AI Boom   and Pony AI Is Scaling Robotaxis Fast—Can the Stock Reach BofA's $17 Target?

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