Reporting Manager
American Century Investment Management, Inc.
Symbol
MSM
Shares outstanding
56M shares
Disclosed Ownership
2.69M shares
Ownership
4.8%
Form type
SCHEDULE 13G/A
Filing time
14 Nov 2025, 09:50:15 UTC
Date of event
30 Sep 2025

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
American Century Investment Management, Inc. 4.8% 2.69M 2.59M 0 American Century Investment Management, Inc. /s/ John Pak / Senior Vice President
American Century Companies, Inc. 4.8% 2.69M 2.59M 0 American Century Companies, Inc. /s/ John Pak / Senior Vice President
Stowers Institute for Medical Research 4.8% 2.69M 2.59M 0 Stowers Institute for Medical Research /s/ Joselyn Verschelden / Authorized Signer