NPK International Inc. (NPKI)
NYSE: NPKI · Services-Miscellaneous Equipment Rental & Leasing · The Woodlands, TX · filing with the SEC since 1995
Grade5.8
◀ Past 3.2● Present 6.0▶ Future 7.9
Who owns NPK International Inc.
As filed with the SECHolders of 5% or more
3
Blackrock, Inc. holds 8.4% of Common Stock, as its SCHEDULE 13G/A filed Jul 29, 2026 says.
Directors and officers
13
report now, of 26 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 29, 2026 · Common Stock
Ameriprise Financial, Inc.
SCHEDULE 13G/A · filed Nov 14, 2025 · Common Stock · 7.7% in May 15, 2025
Vanguard Capital Management
SCHEDULE 13G · filed Jul 31, 2026 · Common Stock
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Apr 9, 2026 · Common Stock · reported falling below 5%, from 5.7% in Oct 9, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What NPKI reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Grassform Plant Hire Limited
A company bought · acquisition · Nov 2025 · owns, named in the 10-K filed Feb 27, 2026
Insider tradesForm 4
16sales
1purchases
16sales on a scheduled plan
7people selling
$5.6Msold, in dollars
$100,000bought, in dollars
Open-market trades on Form 4 from Nov 3, 2025 to Nov 3, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 3, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 26 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Piontek Gregg | Senior Vice President and CFO | 5 | $2.5M | 5 | 0 | $0 |
| Lanigan Matthew | President & CEO | 1 | $2.4M | 1 | 0 | $0 |
| Briggs Lori | VP & President, Ind. Solutions | 2 | $300,000 | 2 | 0 | $0 |
| Fruge Mary Celeste | VP, General Counsel | 2 | $200,000 | 2 | 0 | $0 |
| Robeson Rose M | director | 1 | $100,000 | 1 | 0 | $0 |
| Lewis Michael A | director | 4 | $100,000 | 4 | 0 | $0 |
| Minge John C | director | 0 | $0 | 0 | 1 | $100,000 |
| Warren Matthew James | Chief Accounting Officer | 1 | $0 | 1 | 0 | $0 |