The teams still in the UEFA Champions League depend on which stage you mean, but the latest source available here says the 2025/26 competition had reached the semi-final stage, and UEFA also notes the next season, 2026/27, starts on 7 July 2026.

Current season status

The most recent remaining-team roundup I found is for the 2025/26 Champions League semi-finalists. It does not list the names in the snippet I have, so I can’t reliably name all four from that source alone without risking an error.

Next season

For context, the 2026/27 UEFA Champions League will feature 36 teams in the league phase and begins in July 2026.

Best next step

If you want the exact clubs still alive right now, I need the specific season or round you mean, because “still in” changes fast as the knockout stages move on.