Exhibit 99.1 CRISPR Therapeutics Provides First Quarter 2025 Financial Results and Announces Positive Top-Line Data from Phase 1 Clinical Trial of CTX310™ Targeting ANGPTL3 -Initial CTX310™ Phase 1 clinical data demonstrates dose-dependent decreases in triglycerides (TG) and low- density lipoprotein (LDL), with peak reduction of up to 82% in TG and up to 81% in LDL, with a well-tolerated safety profile; presentation anticipated at a medical meeting in the second half of 2025- -CASGEVY® continues to gain mom ...