This week, which stocks lagged or dragged? Weekly Winners column keeps up with market trends, helping Tigers sort out the week's hottest sectors, stock winners and important news.

Below are top 10 S&P 500 stock gainers for the week ended Jun 5:

Humana Stock Leads Health Insurance Rally as Wall Street Cheers Improving Margins and AI Efficiency Potential

Humana (HUM) stock surged 14% this week, leading a broad rally in health insurance stocks.

The trigger was a wave of bullish analyst notes on the managed care sector, built around two ideas:

Medical costs are moderating, and AI could unlock meaningful efficiency gains.

Bank of America upgraded UnitedHealth to Buy and raised its price target to $450, while Truist raised its UnitedHealth target to $440, both citing favorable Q1 medical cost trends and a strong setup heading into Q2 earnings.

HPE Lifts Forecast Past 2028 Goals on Robust AI Demand, Shares Surge

Hewlett Packard Enterprise posted record second-quarter results on Monday, prompting it to accelerate its long-term financial goals by two years, as expansion of AI data centers boosts demand, sending its shares up 14% this week.

HPE, which competes with Dell and Super Micro Computer, is benefiting as customers increasingly buy its servers and networking products to power AI applications such as ChatGPT, amid higher memory chip prices.

Medtronic Beats Quarterly Estimates on Robust Demand for Heart Devices

Medtronic beat Wall Street estimates for fourth-quarter revenue and adjusted profit on Wednesday, riding the wave of steady ​demand for its heart devices used in complex cardiac ‌procedures.

The medical device maker has been pursuing tuck-in acquisitions to strengthen its portfolio following its diabetes business spinoff, focusing on smaller, targeted deals.

Cooper Companies beats quarterly estimates on strong contact lenses demand

Cooper Companies COO.O beat Wall Street estimates for second-quarter profit and revenue on Thursday, helped by sustained demand for its contact lenses.

Contact lens makers, including Cooper and Bausch + Lomb BLCO.TO, are expected to benefit this year from the shift to premium daily disposable lenses and growing global demand for vision correction.