This is the 12935th most frequent Russian word.
лидерами
"Лидерами" means "leaders" (instrumental plural form).
The word "лидерами" is used in the instrumental plural case, referring to being in a leading position or role in activities.
Мы всегда стараемся быть лидерами в наших начинаниях.
We always strive to be leaders in our endeavors.
The word "лидерами" expresses the role or status of the companies as prominent figures in the specified market, again in instrumental plural.
Эти компании являются лидерами рынка технологий.
These companies are leaders in the technology market.
Here, "лидерами" is used attributively, indicating the athletes playing a leading role in motivating others within the team.