Seeking Alpha identifies ten large-cap energy stocks with strong momentum grades over the past six months. Subsea 7 leads with an A+ grade and 70.18% gain, followed by Ecopetrol (A, +74.73%) and TechnipFMC (A, +49.89%). Other top performers include Tenaris, YPF, Cenovus Energy, Neste, Targa Resources, Valero, and APA Corp, all showing significant price appreciation relative to sector peers.