** Shares of furniture retailer Wayfair W.N fall as much as 16% to $76.83, lowest since October

** Expects first-quarter gross margin to come in at the lower end of its 30% to 31% range, due to rising investments including marketing and advertising spends

** Forecasts Q1 revenue to grow in mid–single-digits year-over-year

** Reports Q4 net loss of $116 million, compared with loss of $128 million a year ago; analysts estimated a profit of $4.1 million - LSEG data

** Co's total active customers for fourth quarter dip 0.5% to 21.3 million from a year ago

** "We expect the slightly softer additions in active customers could be an area of focus for investors with concerns about the sustainability of (average order value (AOV) growth" - Phillip Blee, analyst with William Blair

** Posts Q4 revenue of $3.30 billion, in line with analysts’ estimates

** Stock rose over 126% in 2025

(Reporting by Anuja Bharat Mistry and Krisha Bhatt in Bengaluru)

((Krisha.Bhatt@thomsonreuters.com;))