Form SC 13G/A NATUS MEDICAL INC Filed by: VANGUARD GROUP INC Feb 10, 2022 09:20AM
Form SC 13G/A NATUS MEDICAL INC Filed by: VANGUARD GROUP INC Feb 10, 2021 11:31AM
Form SC 13G/A NATUS MEDICAL INC Filed by: VANGUARD GROUP INC Feb 12, 2020 09:27AM