** Shares in ice cream maker Magnum Ice Cream Company MICCT.AS rise 10.4%, pares gains after rising as much as 12.3%, after the group posted "better than expected" Q1 results, says J.P. Morgan
** "Overall, we expect today's top-line beat to support the shares," says the broker
** The group posted organic sales growth of 4.5% to 1.77 billion euros ($2.07 billion)
** Jefferies sees the group as a modest outperformer
** Shares on track for best day since listing on Dec. 8, if gains hold
** Up to the previous session's close, shares were down 18% YTD
($1 = 0.8561 euros)
(Reporting by Dimitri Rhodes in Gdansk)
((dimitri.rhodes@thomsonreuters.com))