Underfolio

Every trading day › 2026

The stock market on September 28, 2026

September 28, 2026, a Monday. Of 3,310 US stocks that traded, 1,004 rose and 2,186 fell.

Stocks that rose1,004of 3,310; 2,186 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Palo Alto Networks (PANW)+4.6%
Burlington Stores Inc (BURL)+4.6%
Twilio Inc (TWLO)+4.0%

Biggest falls among the 500 largest companies

Mongodb Inc (MDB)-18.5%
Roblox (RBLX)-9.9%
Bloom Energy Corp (BE)-8.9%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ September 25, 2026 · Every September 28 · September 29, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.