** Cloud and software platform provider Calix's CALX.N stock falls 7.1% to $46.05 premarket
** Gross margins to fall by 50 to 150 bps in 2026 vs 100 to 200 bps expansion expected earlier - co
** Q2 adj. gross margin between 54.25% to 57.25%, down from 59% in Q1, primarily due to memory component surcharge - co
** J.P.Morgan cuts PT to $65 from $70 on margin headwinds lowering near-term earnings expectations, but expects better flow-through to revenue once memory-related headwinds
** Co hikes its stock repurchase authorization by $100 mln after Q1 profit beat estimates
** Seven analysts rate stock "buy" or higher, one "hold", median PT at $70 - LSEG-compiled data
** YTD, till last close, CALX down over 6%
(Reporting by Purvi Agarwal in Bengaluru)
((Purvi.Agarwal@thomsonreuters.com;))