SAN DIEGO, Sept. 9, 2026 /PRNewswire/ -- The law firm of Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), have until September 14,...