The S&P 500 is projected to achieve its highest net profit margin since FactSet began tracking data in 2009, reaching approximately 15.7% for the second quarter of 2026. This would surpass the previous record of 14.8% from the first quarter. This strong performance, marking the 10th consecutive quarter of year-over-year earnings growth for the S&P 500, is largely influenced by a significant contribution from Alphabet.
Alphabet's exceptional earnings-per-share (EPS) of $9.11, compared to an estimate of $2.88, was the primary driver of the S&P 500's Q2 earnings growth rate, which surged to 37.9%. Alphabet's results included a net gain of $98.0 billion, predominantly from unrealized gains on equity investments like its stake in SpaceX. Without Alphabet, the S&P 500's blended net profit margin would drop to 14.4% from 15.7%, and its earnings growth rate would fall to 25.9% from 37.9%. Even with this adjustment, the S&P 500 would still show strong earnings growth, marking its second consecutive quarter above 20% and seventh consecutive quarter of double-digit growth.
At the sector level, Communication Services and Information Technology continue to exhibit strong margins. The Communication Services sector, driven by Alphabet, saw its net profit margin increase to 28.0% in Q2 2026, up from 15.2% in Q2 2025 and 20.7% in Q1 2026. Conversely, sectors like Health Care experienced a decline in net profit margins. Analysts project S&P 500 net profit margins to remain around 15% for the remainder of 2026.
Despite the impressive headline figures, the concentration of profits is notable. The 10 largest S&P 500 companies account for approximately 34% of all S&P 500 profits, double their share from the mid-1990s. The common thread behind much of the market's strength is the AI investment thesis, with companies supplying AI infrastructure, cloud providers, and software companies monetizing AI services, and semiconductor leaders like Nvidia benefiting from surging data center investments. Roughly 86% of reporting companies have exceeded EPS estimates, and 80% have topped revenue expectations, both above long-term averages.
However, some analysts express caution, noting that Alphabet's outsized profit gain relies heavily on "illusory security of a series of unrealized investment returns." Concerns also exist regarding the significant capital expenditures by tech giants like Alphabet, Amazon, Meta, and Microsoft, which could collectively outlay upwards of $700 billion this year, largely driven by data center costs for AI infrastructure.
