BUZZ-U.S. STOCKS ON THE MOVE -Marvell, Allbirds, Immunic

March 31 (Reuters) - Wall Street's main indexes advanced on Tuesday, as investors cheered a report signaling potential de-escalation in the Middle East conflict that has set the S&P 500 and the Dow on track for their biggest monthly decline in nearly four years. .N

At 13:30 EDT, the Dow Jones Industrial Average .DJI was up 2.05% at 46,146.22. The S&P 500 .SPX was up 2.41% at 6,496.37, and the Nasdaq Composite .IXIC was up 3.39% at 21,498.62.

The top three S&P 500 .PG.INX percentage gainers:

** ON Semiconductor Corp ON.O, up 9.1%

** Sandisk Corp SNDK.O, up 9.0%

** Monolithic Power Systems Inc MPWR.O, up 8.3%

The top three S&P 500 .PL.INX percentage losers:

** Constellation Energy Corp CEG.O, down 7.4%

** CF Industries Holdings Inc CF.N, down 7.3%

** McCormick & Company Inc MKC.N, down 5.0%

The top three NYSE .PG.N percentage gainers:

** Virgin Galactic Holdings Inc SPCE.N, up 15.4%

** Tamboran Resources Corp TBN.N, up 14.3%

** LiveWire Group Inc LVWR.N, up 14.1%

The top three NYSE .PL.N percentage losers:

** Phreesia Inc PHR.N, down 30.1%

** JJill Inc JILL.N, down 25.7%

** T1 Energy Inc TE.N, down 23.0%

The top three Nasdaq .PG.O percentage gainers:

** Apellis Pharmaceuticals Inc APLS.O, up 135.6%

** 3 E Network Technology Group Ltd MASK.O, up 101.6%

** Bullfrog AI Holdings Inc BFRG.O, up 65.2%

The top three Nasdaq .PL.O percentage losers:

** Neo-Concept International Group Holdings Ltd NCI.OQ, down 77.9%

** IO Biotech Inc IOBT.OQ, down 74.0%

** PepGen Inc PEPG.OQ, down 63.7%

** McCormick & Company Inc MKC.N:BUZZ - Falls after Unilever agrees to $65 billion food-business merger nL6N40J19Z

** Phreesia Inc PHR.N:BUZZ - Stock tumbles on lowered 2027 revenue outlook nL6N40J0WG

** Emerson Electric Co EMR.N:BUZZ - Gains after Jefferies assumes coverage with 'buy' rating nL4N40J1JY

** Amphenol Corp APH.N:BUZZ - Rises after Jefferies assumes coverage with 'buy' rating nL4N40J1K6

** Allbirds Inc BIRD.O:BUZZ - Soars on $39 million deal nL6N40J11G

** Rockwell Automation Inc ROK.N:BUZZ - Edges lower after Jefferies cuts to 'hold' nL4N40J0X3

**Affinity Bancshares Inc AFBI.O:BUZZ - Climbs after Fidelity takeover deal nL6N40J13D

** Immunic Inc IMUX.O:BUZZ - Rises after board hire of MS drug veteran nL4N40J0WQ

** Constellation Energy Corp CEG.O:BUZZ - Slips after forecasting 2026 profit below estimates nL6N40J1FA

** Vertiv Holdings Co VRT.N:BUZZ - Falls after Jefferies cuts to 'hold' nL4N40J0YS

** Centessa Pharmaceuticals PLC CNTA.O:BUZZ - Hits record high on up to $7.8 billion Eli Lilly buyout nL4N40J1JU

** Apellis Pharmaceuticals Inc PLS.O:BUZZ - Jumps as Biogen agrees $5.6 bln buyout nL4N40J0YD

** APA Corp APA.O:

** Occidental Petroleum Corp OXY.N:

** Marathon Petroleum Corp MPC.N:

** Valero Energy Corp VLO.N:

BUZZ - US energy stocks face fifth month of gains as MidEast conflict strains supply nL4N40J0ZK

** Newmont Corp NEM.N:

** Gold Fields Ltd GFI.N:

** AngloGold Ashanti PLC AU.N:

** Harmony Gold Mining Co Ltd HMY.N:

BUZZ - Gold miners gain as bullion prices tick higher nL4N40J10N

** TE Connectivity PLC TEL.N:BUZZ - Jefferies assumes coverage on TE Connectivity, cites strong AI demand nL4N40J11A

** ImmunityBio Inc IBRX.O:BUZZ - Rises as biotech secures $100 mln to fund global expansion nL4N40J11B

** Canadian Solar Inc CSIQ.O:BUZZ - Up after e‑STORAGE wins 420‑MWh UK battery deal with Drax nL4N40J10D

** Lennar Corp LEN.N:BUZZ - Truist cuts Lennar's PT, cites shift to land-light strategy nL4N40J138

** Colgate-Palmolive Co CL.N:BUZZ - TD Cowen cuts rating on Colgate to 'hold', flags resin cost risks nL4N40J147

** Scholar Rock Holding Corp SRRK.O:BUZZ - Up after refiling FDA application for genetic disorder drug nL4N40J12H

** Caribou Biosciences Inc CRBU.O:BUZZ - Rises on FDA's regenerative medicine advanced therapy tag for blood cancer therapy nL4N40J142

** Stryker Corp SYK.N:BUZZ - Rises after naming veteran as VP of investor relations nL4N40J14S

** TD Synnex Corp SNX.N:BUZZ - Shares climb after Q1, forecast beat nL6N40J17P

** Marvell Technology Inc MRVL.O:BUZZ - Rises on Nvidia's $2 billion investment nL4N40J162

** Factset Research Systems Inc FDS.N:BUZZ - Climbs after lifting 2026 outlook nL6N40J16G

** Ramaco Resources Inc METC.O:BUZZ - Rises after board authorizes internal reorganization nL4N40J1GZ

** Alaska Air Group Inc ALK.N:BUZZ - Raymond James cuts Alaska Air's PT, cites fuel costs nL4N40J198

** Unilever PLC UL.N:BUZZ - Shares fall on food business merger deal with McCormick nL6N40J0GC

** Satellogic Inc SATL.O:BUZZ - Descends on $50 mln stock sale plans nL6N40J1AK

** Service Properties Trust SVC.O:BUZZ - Plunges to record low after launching $500 mln stock offering nL6N40J1BC

** Shake Shack Inc SHAK.N:BUZZ - Rises after BofA upgrades stock to 'neutral' rating nL4N40J1FJ

** Perpetua Resources Corp PPTA.O PPTA.O:BUZZ - Gains as US EXIM board advances proposed loan to congressional notice nL4N40J1EB

** Southwest Airlines Co LUV.N:BUZZ - Raymond James cuts PT on Southwest Airlines, trims earnings forecast on energy volatility nL4N40J1KQ

** Snap Inc SNAP.N:BUZZ - Climbs after activist investor Irenic discloses stake in co nL6N40J18X

** Virgin Galactic Holdings Inc SPCE.N:BUZZ - Jumps on upbeat forecast nL6N40J1GK

** Dell Technologies Inc DELL.N:BUZZ - Down; Truist Securities starts with 'hold' on memory cost inflation nL4N40J1P2

(Compiled by Rajarshi Roy and Harshita Mary Varghese in Bengaluru)

((Rajarshi.Roy@thomsonreuters.com))