Matthew S. Lanigan owns 1.21% of NPK International
1,024,948 shares as of the June 3, 2026 filing, worth $11M at the latest close.
NPKI · $914M market capGet an email when Matthew S. Lanigan’s stake moves.
Free.
The stake
1.21%
worth $11M at the latest close
Stake rank
#1,651
by dollar value of the stake
Last sale
138 days ago
Jun 3, 2026
Last buy
1,536 days ago
Aug 5, 2022 · $48,435
Matthew S. Lanigan owns 1.21% of NPK International Inc.: 1,024,948 of 84,909,894 shares, worth about $11M at the 2026-10-16 close. The stake has moved from 0.06% in 2016 to 1.21% on 2026-07-28, across 3 sales and 1 purchase that moved it since 2016. The last trade that moved it was a planned sale of $2.4M on 2026-06-03.
How the stake is held
as of the Jun 3, 2026 filing
SHARES
OF THE STAKE
COMMON STOCK · stated Jun 3, 2026 · Form 4 ↗
HELD DIRECTLY
254,699
24.8%
HELD INDIRECTLY · by Trust
770,249
75.2%
THE STAKE
1,024,948
1.21%