Check out some of the companies making the biggest moves midday: Amentum Holdings — The defense contractor tumbled about 12% after fiscal first-quarter revenue and adjusted EBITDA missed Wall Street analysts’ consensus estimates, according to FactSet data. BP Plc — The British oil major suspended its buyback program , deciding to use the cash instead to strengthen its balance sheet. BP ADRs sank 6% in the U.S. ZoomInfo Technologies — The cloud-based sales and marketing platform slumped 10% after forecasting first-quarter earnings per share excluding one-time items of 25 cents to 27 cents per share. Analysts expected 27 cents for the quarter, according to FactSet data. Fourth-quarter billings and adjusted gross margin were also light. Datadog — Shares of the software company rose 16% as both fourth-quarter results and its first-quarter outlook topped estimates. The bounceback puts Datadog shares up 2% month-to-date. The company said AI adoption is driving greater use of its cloud security products, with customers using four or more of its products. Ichor Holdings — Shares soared 37% to a 52-week high after the maker of semiconductor equipment parts said strong demand for etch and deposition intensity services fueled a fourth-quarter earnings beat. A first-quarter forecast was above what analysts were expecting, according to FactSet. Ichor also said it expects its gross profit to accelerat …