** Shares of 3D Systems DDD.N slump 25% to $1.92 after co's qtrly rev misses expectations and it withdraws full-yr guidance due to tariff impacts

** DDD's stock on course for biggest daily drop since Oct 2018

** Rock Hill, South Carolina-based 3D printer maker late Mon said Q1 rev fell 8% y/y to $94.5 mln, while analysts had modeled rev of $99.5 mln, according to LSEG data

** “Our first quarter revenues reflect a continuation of challenging top-line pressures as many customers are delaying their capital investments in order to get greater clarity around potential tariff impacts on their manufacturing and distribution strategies," CEO Jeffrey Graves said in the statement

** Adj loss/sh in qtr of 21 cents was wider than the 14 cents loss analysts expected

** Co also said it's withdrawing 2025 outlook citing protracted weakness in customer spending

** Conversely, shares of peer Stratasys SSYS.O rose 14.5% on Thurs after it reported Q1 rev beat and reiterated its 2025 rev outlook of $570-$585 mln, assuming impacts of tariff policy, global inflationary pressures, high interest rates and supply chain costs don't further impede economic activity

** With move on Tues, DDD's shares down 41% YTD following 48% plunge in 2024

(Lance Tupper is a Reuters market analyst. The views expressed are his own)

((lance.tupper@tr.com 1-646-279-6380))