Preheat oven to 425°F (220°C). Pat beef dry and tie with kitchen twine for even cooking.
In a bowl, mix butter, garlic, rosemary, thyme, salt, and pepper.
Heat olive oil in a skillet over medium-high. Sear tenderloin on all sides until browned, about 2–3 minutes per side.
Remove from heat and spread the garlic herb butter all over the beef.
Transfer to a roasting pan or oven-safe skillet. Roast for 25–30 minutes or until internal temp reaches 130°F (54°C) for medium-rare.
Let rest 10–15 minutes before slicing.