Check out the companies making headlines before the bell: UnitedHealth — The largest health insurer by revenue rose more than 1% after beating analysts’ third-quarter expectations. The company, part of the Dow Jones Industrial Average, posted adjusted earnings of $6.56 per share on revenue of $92.4 billion. Analysts polled by LSEG had expected per-share earnings of $6.32 on revenue of $91.37 billion. BlackRock — BlackRock fell by 1.8% premarket after missing third-quarter revenue forecasts. The asset manager reported $4.52 billion in revenue, lower than the consensus estimate of $4.54 billion from LSEG. Blackrock did beat on earnings: $10.91 adjusted per-share earnings, greater than the estimated $8.26 per share. PNC Financial Services Group — Pittsburgh-based PNC dipped by 0.2% after reporting third-quarter results. Revenue came in $5.23 billion, worse than the $5.32 billion expected by analysts polled by LSEG. But earnings topped forecasts: $3.60 per share, better than the anticipated $3.11 per share. Dollar General — Dollar General jumped 7% after Gordon Haskett upgraded shares to buy. The Wall Street firm said the discount chain’s latest leadership change could help stabilize the company. JPMorgan Chase & Co. — The country’s largest bank reported third-quarter financial results Friday , boosting its profit from a year earlier to $4.33 per share – a figure not immediately comparable to LSEG estimates. Revenue came in at $40.69 billion for the quarter, compared to the LSEG estimate of $39.63 billion. The shares were little changed in early morning trading. Wells Fargo — Wells Fargo added nearly 2% after third-quarter earnings and revenue topped expectations . The bank posted revenue of $20.86 billion, more than the $20.11 billion estimated by analysts polled by LSEG. Earnings were not immediately comparable but the bank’s earnings per share of $1.48 in the quarter, or $1.39 excluding discrete tax benefits, appeared to top the LSEG consensus per-share earnings of $1.24. Citigroup — Citigroup was higher by 2% after beating third-quarter revenue expectations. The Jane Fraser-led bank reported revenue of $20.14 billion, more than the consensus estimate of $19.31 billion from LSEG. Earnings was not immediately comparable. JD.com — JD.com shares slid more than 4% in premarket trading. Morgan Stanley downgraded the Chinese e-commerce stock to equal-weight and cut its price target, citing weak consumer demand. Post Holdings — Shares gained 0.5% after JPMorgan initiated coverage of the St. Louis-based breakfast cereal maker with an overweight rating, citing strong cash flow. — CNBC’s Tanaya Macheel contributed reporting