Bank of America research highlights the S&P 500 stocks that have seen the biggest expansion in ownership breadth, meaning the percentage of institutional funds holding each stock over the past year.
The data shows a clear pattern: AI and technology-related names dominate the list, reflecting how investor enthusiasm around artificial intelligence has driven steady inflows into the sector.
Palantir Technologies (PLTR) leads by a wide margin, with ownership rising from just 7% of funds a year ago to 32% today, a jump of 26 percentage points, the largest increase in the entire index.
Other AI-linked or semiconductor-adjacent firms such as Broadcom (AVGO), Arista Networks (ANET), and Amphenol (APH) also saw strong gains in fund participation, underscoring the broad-based institutional pivot into AI infrastructure and data-enabling technologies.
Beyond the core tech names, the inclusion of GE Vernova (GEV) and Gilead Sciences (GILD) shows that investors are diversifying exposure across sectors while still prioritizing growth resilience. Large-cap communication services firms like Meta Platforms (META) and Netflix (NFLX) also attracted new fund ownership
Below is a list of stocks with the largest increase in ownership breadth according to Bank of America global research, ranked by their Seeking Alpha Quant Ratings.
Arista Networks (ANET) and AppLovin (APP) top the list, earning “Strong Buy” ratings from the Quant system with scores of 4.78 and 4.52, respectively. These two names stand out as the only stocks on the list to achieve bullish assessments above the 3.5 threshold.
The remainder of the top five includes Western Digital (WDC), Broadcom (AVGO), and GE Vernova (GEV), all carrying “Hold” ratings. Notably, Western Digital has delivered the strongest year-to-date performance of the group at 54.54%, while GE Vernova has gained 28.40% YTD despite its more neutral Quant assessment.
Here is the list:
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Arista Networks (ANET), Quant Rating: 4.78
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AppLovin (APP), Quant Rating: 4.52
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Western Digital (WDC), Quant Rating: 3.49
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Broadcom (AVGO), Quant Rating: 3.48
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GE Vernova (GEV), Quant Rating: 3.44
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Palantir Technologies (PLTR), Quant Rating: 3.44
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Meta Platforms (META), Quant Rating: 3.37
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Amphenol (APH), Quant Rating: 3.34
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Gilead Sciences (GILD), Quant Rating: 3.26
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Netflix (NFLX), Quant Rating: 3.18