| 100% | SCOTUS | 6 | Group at 1 First Street NE in DC |
| 37% | BTS | 3 | Group whose song “Butter” spent ten weeks at No. 1 in 2021 |
| 33% | SPICEGIRLS | 10 | First British group since the Beatles to have two albums in the U.S. top 10 at the same time |
| 32% | ERST | 4 | At first, in Frankfurt |
| 31% | WITCHES | 7 | First group seen in "Macbeth" |
| 31% | ORIG | 4 | At first, in the OED |
| 30% | SERIESI | 7 | First group in a product run |
| 30% | BIGGIRLSDONTCRY | 15 | 1962 #1 hit by the group hinted at in this puzzle's theme |
| 30% | RHODA | 5 | First TV show to debut at #1 in the Nielsen ratings |
| 30% | BETATHETAPI | 11 | Group formed at Miami University in 1839 |
| 30% | OMEGAPSIPHI | 11 | Group formed at Howard University in 1911 |
| 30% | ALPHACHIRHO | 11 | Group formed at Trinity College in 1895 |
| 30% | ROSA | 4 | First name in December 1, 1955 headlines |
| 29% | SOUP | 4 | First in a group leader to 28-Down |
| 29% | TSA | 3 | Group in charge of screenings at airports: Abbr. |
| 29% | CANNESOPENER | 12 | First showing at a film festival in France? |
| 29% | FLORENCE | 8 | First city in Europe with paved streets (1339) |
| 29% | LEX | 3 | First name in DC Comics villainy |
| 29% | DINER | 5 | Royal racket at first in bistro |
| 29% | BTS | 3 | First K-Pop group to perform at the Grammys |
| 29% | BOOKOFHOSEA | 11 | First of a group of 12 in the Bible |
| 29% | NBW | 3 | First bank established in Washington, DC: Abbr. |
| 29% | RHESUS | 6 | Blood group system first observed in monkeys |
| 29% | NSC | 3 | Policy group in DC: Abbr. |
| 29% | OUTSET | 6 | Not in group at start |
| 28% | IFELL | 5 | "___ in love with him at first sight...": 2 wds. |
| 28% | RYDERCUP | 8 | Golf contest first held at Worcester in 1927 |
| 28% | ATOM | 4 | It was first split at Cambridge in 1932 |
| 28% | BLISS | 5 | Delight in fifty-one ships, British at first |
| 28% | WHO | 3 | Player at first base in a famous routine |