This is the 12196th most frequent Russian word.
инициаторами
"Initiators."
'Инициаторами' is used as a plural instrumental case of the noun 'инициатор' (initiator), describing the entities who initiated an action.
Инициаторами новой политики стали члены правительства.
The initiators of the new policy were members of the government.
'Инициаторами' again functions in instrumental case, highlighting who took the main active role in the subject of the sentence.
В научном проекте инициаторами всех экспериментов выступили молодые исследователи.
In the scientific project, the initiators of all experiments were young researchers.
Utilized in plural instrumental, 'инициаторами' identifies the group advocating for changes.