Reporting Manager
Dimensional Fund Advisors LP
Symbol
NPK
Shares outstanding
7,106,604 shares
Disclosed Ownership
341,117 shares
Ownership
4.8%
Form type
SCHEDULE 13G/A
Filing time
15 Apr 2025, 12:18:00 UTC
Date of event
31 Mar 2025

Reporting Managers (1)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Dimensional Fund Advisors LP 4.8% 341,117 329,824 0 Selwyn Notelovitz Global Chief Compliance Officer