CAllCrmCompany::GetTopIDsInCategory

static function GetTopIDsInCategory($categoryId, $top, $sortType = 'ASC', $userPermissions = null)
{
	$top = (int)$top;
	if ($top <= 0)
	{
		return [];
	}

	$sortType = mb_strtoupper($sortType) !== 'DESC' ? 'ASC' : 'DESC';

	return \Bitrix\Crm\Entity\Company::getInstance()->getTopIDs([
		'order' => ['ID' => $sortType],
		'limit' => $top,
		'filter' => ['@CATEGORY_ID' => $categoryId, '=IS_MY_COMPANY' => 'N'],
		'userPermissions' => $userPermissions
	]);
}