15 Best Performing Stocks in S&P 500 Last 3 Months

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2. Arista Networks, Inc. (NYSE:ANET)

3-Month Performance: 50.08%

Number of Hedge Fund Holders: 81

Arista Networks, Inc. (NYSE:ANET) ranks among the best performing S&P 500 stocks in the last 3 months. On August 27, Arista Networks, Inc. (NYSE:ANET) spoke at Deutsche Bank’s 2025 Technology Conference, offering a strategic perspective of its cloud-based network and AI infrastructure breakthroughs. The company raised its revenue projection significantly, while simultaneously addressing market difficulties and operational efficiency.

Arista Networks, Inc. (NYSE:ANET) increased its revenue outlook by about $550 million, with the latest VeloCloud acquisition accounting for $50 million. In that line, the company sees enormous potential for expansion in the campus market, and intends to use the VeloCloud purchase to expand branch products.

Additionally, the company revealed alliances with major clients and a focus on software-defined networking during the presentation.

Arista Networks, Inc. (NYSE:ANET) is an American computer networking company headquartered in Santa Clara, California. The company specializes in developing and providing multilayer network switches that enable software-defined networking in large-scale data centers, cloud computing, high-performance computing, and high-frequency trading environments.

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