best performing s and p 500 stocks monthly in 2025

Sandisk (SNDK) had the best month last year by a US stock in the S&P 500 (GSPC) in September 2025, returning 120%.

ASSETMONTH% RETURN
Sandisk (SNDK)
September 2025
119.96%
Sandisk (SNDK)
October 2025
76.3%
Warner Bros Discovery (WBD)
September 2025
72.83%
Bloom Energy (BE)
September 2025
69.14%
Bloom Energy (BE)
August 2025
61.7%
Bloom Energy (BE)
October 2025
59.86%
Bloom Energy (BE)
July 2025
59.65%
Advanced Micro Devices (AMD)
October 2025
59.15%
Ciena (CIEN)
September 2025
57.18%
Lumentum (LITE)
November 2025
55.81%
Applovin (APP)
September 2025
54.86%
Western Digital (WDC)
September 2025
53.08%
Super Micro Computer (SMCI)
February 2025
52.43%
Micron Technology (MU)
September 2025
44.42%
Seagate Technology (STX)
September 2025
44.03%
Robinhood Markets (HOOD)
September 2025
42.69%
Robinhood Markets (HOOD)
June 2025
41.8%
Coinbase Global (COIN)
June 2025
41.64%
Palantir Technologies (PLTR)
April 2025
41.18%
Intel (INTC)
September 2025
40.49%
Lam Research (LRCX)
September 2025
40.09%
NRG Energy (NRG)
May 2025
40.08%
Applovin (APP)
May 2025
39.36%
Generac (GNRC)
July 2025
38.32%
Reddit (RDDT)
June 2025
37.94%