Observed Signal · May 15, 2026 · Regulatory Filing · Source: CNBC Investing · Impact: 2/5 · Sentiment: Neutral
Appaloosa Doubles Amazon Stake, Adds Sandisk in Q1
David Tepper’s hedge fund Appaloosa Management substantially changed its disclosed equity holdings in the first quarter, increasing technology and AI-related positions while trimming others. A regulatory filing showed Appaloosa nearly doubled its Amazon stake (a 98% increase), making Amazon its largest disclosed holding at roughly $900 million. The firm also opened a sizable new position in Sandisk (~$179 million), boosted stakes in Uber (+242%), Vistra Energy (+114%), Taiwan Semiconductor (+18%) and Micron (+11%), and increased exposure to the iShares MSCI South Korea ETF (EWY). At the same time Appaloosa reduced holdings in Alibaba (‑33%), trimmed Alphabet (‑3%) and cut Nvidia (‑13%), though Alphabet, Alibaba and Nvidia remained among its top 10 disclosed U.S. equity holdings. The moves underline Tepper’s positioning around AI themes including semiconductors, cloud infrastructure and rising data‑center power demand.
Quarterly regulatory filing reveals large portfolio shifts into AI‑related tech and semiconductors by a prominent hedge fund; notable for market participants but not industry‑shifting policy or product news.
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Key Takeaways & Evidence Grounding
- Appaloosa Management increased its Amazon position by 98% in Q1, making Amazon its largest disclosed equity holding valued at roughly $900 million at quarter-end.
- Appaloosa disclosed a new, sizable Sandisk position valued at roughly $179 million at the end of March.
- The hedge fund boosted its Uber stake by 242% and raised its Vistra Energy holding by 114% during the quarter.
- Appaloosa increased its positions in Taiwan Semiconductor (+18%) and Micron Technology (+11%), and grew its holding in the iShares MSCI South Korea ETF (EWY).
- The fund reduced its Alibaba Group stake by 33%, trimmed Alphabet by 3% and cut Nvidia by 13%; Alphabet, Alibaba and Nvidia remained among Appaloosa’s 10 largest disclosed U.S. equity holdings.
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Tepper’s Appaloosa Loads Magnificent Seven, Sells Memory Stocks
Hedge fund Appaloosa Management, run by David Tepper, shifted its second-quarter portfolio toward large-cap technology names while trimming or exiting high-flying memory-chip positions. Regulatory filings show Appaloosa increased its Amazon stake by over 15% (to nearly $1.2 billion), boosted holdings in Meta Platforms (~55%) and Alphabet (~7%), and created a new Apple position (~$241 million). At the same time, the fund cut Micron Technology by more than 41% (though Micron remained a top holding at about $1.125 billion) and fully sold a SanDisk stake worth over $400 million. Tepper also opened positions in Boeing (~$173 million) and American Airlines (~$136 million) and sold stakes in Corning, L3Harris and RTX. The moves come amid volatile AI-driven demand for memory chips.
D1 Capital Bought Tech Stocks, Exited Meta Stake
D1 Capital, run by Daniel Sundheim, reallocated its portfolio in Q1 2026, adding to several major technology and AI-related stocks while exiting others. Regulatory filings show the hedge fund fully sold its stake in Meta (more than 376,000 shares, a position worth over $240 million), and also exited holdings in Synopsys and Arista Networks. The fund trimmed Spotify by about 14% but increased its Amazon position by more than 34%, making Amazon one of its top holdings (worth roughly $376.5 million). Sundheim expanded exposure to AI and semiconductor names — including Broadcom, Nvidia, Alphabet, ASML and Taiwan Semiconductor — and kept Instacart as the fund’s largest holding (about $845 million). The reporting cites regulatory filings and portfolio data from InsiderScore. The article was published May 15, 2026.
Druckenmiller Bought Amazon and Chip Stocks Pre-Rout
Billionaire investor Stanley Druckenmiller’s Duquesne Family Office increased holdings in AI-linked technology and semiconductor stocks in Q2 2026, according to a regulatory filing. The filing shows the firm raised its Amazon stake to about $129 million and disclosed a new $120 million position in Alphabet. Druckenmiller also boosted positions in Taiwan Semiconductor to $282 million and STMicroelectronics to $232 million, and added smaller stakes in AMD and Palo Alto Networks. Clinical genetic-testing company Natera remained his largest holding at over $800 million as of June 30. The filing covers holdings through June 30, leaving it unclear whether these positions were held or adjusted during the sharp market declines in July.
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