| 100% | EXXON | 5 | Merger with Mobil in 1999 |
| 72% | EXXON | 5 | It merged with Mobil in 1999 |
| 71% | EXXON | 5 | Company that merged with Mobil in 1999 |
| 70% | EXXON | 5 | Oil corporation that merged with Mobil in 1999 |
| 70% | EXXON | 5 | Oil giant that merged with Mobil in 1999 |
| 46% | CHER | 4 | Singer who made a comeback in 1999 with "Believe" |
| 46% | EXXON | 5 | Company in a 1999 merger |
| 45% | MOBIL | 5 | Oil company in a 1999 merger |
| 45% | MOBIL | 5 | It merged with Exxon in 1999 |
| 45% | HULL | 4 | Rod —, entertainer who died in 1999, associated with the puppet Emu |
| 42% | MOBIL | 5 | Company that merged with Exxon in 1999 |
| 42% | CHER | 4 | One-named singer with #1 hits in 1965 and 1999 |
| 41% | JEWEL | 5 | Singer-actress who played Sue Lee Shelley in 1999 film drama Ride with the Devil |
| 41% | ONO | 3 | Loser, with Bono, to Fabio, in a 1999 "Celebrity Deathmatch" episode |
| 40% | JEWEL | 5 | Singer and actress who played Sue Lee Shelley in 1999 film drama Ride with the Devil |
| 40% | MOBIL | 5 | Oil company that merged with Exxon in 1999 |
| 39% | TEXACO | 6 | Company in a 2001 merger with Chevron |
| 39% | CITICORP | 8 | Party in a 1998 merger with Travelers |
| 38% | FRIENDS | 7 | "Graduation (___ Forever)," 1999 song by Vitamin C, with a music video set in school |
| 38% | PGA | 3 | ___ Tour (org. that announced a planned merger with LIV, in June, 2023) |
| 38% | ALEROS | 6 | Car models introduced in 1999 |
| 38% | MACAO | 5 | Reverted to China in 1999 |
| 38% | TIVO | 4 | DVR brand introduced in 1999 |
| 38% | TIVO | 4 | Show recorder released in 1999 |
| 38% | TIVOS | 5 | Program savers introduced in 1999 |
| 38% | TWA | 3 | Co. in a 2001 merger with American |
| 37% | AOL | 3 | Company in a 2011 merger with the Huffington Post |
| 37% | AOL | 3 | Co. in a 2001 merger with Time Warner |
| 36% | FOSSE | 5 | Tony-winning musical in 1999 |
| 36% | SANTANA | 7 | Starting in 1999, rock band with a song in the top 10 of the Billboard Hot 100 for 42 consecutive weeks |