This week, which stocks led? 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 May 2:

Carrier Global Stock Surges on Strong Results, Raised Profit Outlook

Carrier Global shares surged 19.1% this week as the heating, ventilation, and air conditioning company posted better-than-expected results for the first quarter and raised its full-year profit outlook.

The Palm Beach Gardens, Fla.-based company reported adjusted EPS of 65 cents on sales that fell 4% year-over-year to $5.22 billion. Analysts who follow Carrier and were polled by Visible Alpha expected 58 cents and $5.2 billion, respectively.

Carrier raised its full-year adjusted EPS outlook to a range of $3 to $3.10 from the prior $2.95 to $3.05. It also sees 2025 sales of about $23 billion, versus approximately $22.5 billion to $23 billion previously.

Arista Networks Stock Surges on Analyst Upgrade

Arista Networks shares surged 16.83% driven primarily by positive sentiment around an analyst upgrade and stronger-than-expected contract wins.

Rosenblatt Securities prognosticator Mike Genovese became slightly more optimistic on Arista's future, as he upgraded his recommendation to neutral from his previous sell. His price target on the specialty tech company is now $85 per share.

Trane Technologies Jumps on Earnings Guidance, Solid Bookings

Trane Technologies shares surged 14.83% this week after reporting double-digit revenue and earnings growth in the first quarter, fueled by continued strength in its Americas commercial HVAC segment. The company reaffirmed its full-year guidance and indicated results are likely to land toward the high end of its forecast ranges.

“In the first quarter, our global team delivered outstanding performance through our purpose-driven strategy, extending our consistent track record of results,” Dave Regnery, chair and chief executive of Trane Technologies (NYSE:TT), said in a statement.

Regnery added that robust bookings in the Americas heating, ventilation and air-conditioning business set a new record, boosting the company’s backlog and laying the foundation for sustained momentum throughout 2025.

DexCom Announces $750M Buyback and Reiterates 2025 Earnings Guidance

DexCom shares jumped 13.9% this week as the maker of glucose monitoring devices for people with diabetes reported better-than-expected quarterly revenue and announced a $750 million stock buyback program.

The San Diego-based DexCom reported first-quarter revenue that grew 12% year-over-year to $1.04 billion. Analysts surveyed by Visible Alpha expected $1.02 billion. Adjusted earnings per share of 32 cents missed estimates by a penny.

DexCom affirmed its full-year outlook for revenue of $4.6 billion, adjusted operating margin of approximately 21%, and adjusted EBITDA margin of about 30%.

Howmet Aerospace Lifts 2025 Profit Forecast on Strong Demand, Shares Rise

Howmet Aerospace raised its 2025 profit forecast, despite impacts from U.S. tariffs, sending shares up 13.49% this week as the maker of castings and fasteners expects to pass on higher costs and sees strong demand from increased jet production.

The Pittsburgh-based supplier to planemakers Boeing and Airbus in February forecast better-than-expected first-quarter revenue and profits on strong aircraft demand, but had given a conservative outlook for 2025 due to tariffs.

The updated outlook, which includes current assumptions on tariff impacts, projects adjusted profit per share between $3.36 and $3.44, up from the previous forecast of $3.13 to $3.21.

Its adjusted profit per share for the quarter was 86 cents, surpassing Wall Street expectations of 78 cents.

Southwest Airlines Shares Climb for Nine Consecutive Sessions

Southwest Airlines shares rose for nine straight sessions, and jumped 12.68% this week.

Southwest Airlines announced new fare products on Monday and additional benefits for its Rapid Rewards Credit Cardmembers and Tier Members, ahead of the shift to an assigned seating model.

The company plans to increase legroom, charge for checked bags, and eliminate open seating, all of which are in hopes of increasing ancillary fees.

On April 29, Pierre R. Breber, a director at Southwest Airlines, made several acquisitions of the company’s common stock, according to a recent SEC filing. Breber purchased a total of 10,000 shares, with transaction prices ranging from $26.74 to $27.00 per share.

Seagate Technology Stock Jumps as Earnings Underscore Storage Demand

Seagate Technology forecasted fourth-quarter results above Wall Street estimates, signaling steady demand for its storage and cloud devices for mass capacity storage used in personal computers, sending the company's shares up 12.54% this week.

For the fourth-quarter, Seagate expects revenue to be at $2.40 billion, plus or minus $150 million, above analysts' estimate of $2.3 billion, according to data compiled by LSEG.

The company forecast adjusted earnings per share of $2.40 for the fourth quarter, above analysts' estimate of $2.07 per share.

The company posted revenue of $2.16 billion for the third quarter ended March 28, that surpassed estimates of $2.12 billion.

Quanta Services Stock Rises as Q1 Earnings Top Estimates, Guidance Raised

Quanta reported first quarter earnings that exceeded analyst expectations, driving its stock up 11.76% this week. The infrastructure solutions provider also raised its full-year guidance, signaling confidence in its outlook despite macroeconomic uncertainties.

For the first quarter ended March 31, 2025, Quanta Services posted adjusted earnings per share of $1.78, surpassing the analyst consensus of $1.74. Revenue came in at $6.23 billion, beating estimates of $5.88 billion and representing a 23.9% increase YoY from $5.03 billion.

The company’s strong performance was driven by robust demand for its collaborative infrastructure solutions. Quanta Services reported record quarterly backlog of $35.3 billion, indicating a healthy pipeline of future projects.

Microsoft Stock Jumps as Cloud and AI Strength Drives Earnings Growth

Microsoft forecasted stronger-than-expected quarterly growth for its cloud-computing business Azure after blowout results in the latest quarter, calming investor worries in an uncertain economy and lifting its shares 11.08% this week.

Microsoft said revenue at its Azure cloud division rose 33% in the third quarter ended March 31, exceeding estimates of 29.7%, according to Visible Alpha. AI contributed 16 percentage points to the growth, up from 13 points in the previous quarter.

The company also forecast cloud-computing revenue growth of 34% to 35% on a constant currency basis for the fiscal fourth quarter to between $28.75 billion and $29.05 billion, well above analyst estimates, according to data from Visible Alpha.