NPK International Inc. (NPKI)
SERVICES-MISCELLANEOUS EQUIPMENT RENTAL & LEASING
NPK International Inc. (NPKI) is listed on the New York Stock Exchange, where it has traded since September 6, 1990.
- Listed On
- the New York Stock Exchange
- Listed Since
- September 6, 1990
- Employees
- 510
- Market Cap
- $995M
About NPK International Inc.
NPK International Inc is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. The company generates majority of revenue from the rental of recyclable composite matting systems, along with related site construction and services to customers in various markets including power transmission, oil and natural gas exploration and production, pipeline, renewable energy, petrochemical, construction and other industries within the United States and United Kingdom. It generates maximum revenue from United States.
Institutional ownership
In 13F filings for the quarter ended June 30, 2026, 247 institutions reported holding NPKI, with 78.5 million shares worth $1.2 billion in aggregate. The largest reported holder was BlackRock, with 7.9 million shares worth $126.3 million. Of the 5 largest holders listed below, 3 added shares and 2 reduced their positions during the quarter.
| Institution | Shares | Value | Quarter change |
|---|---|---|---|
| BlackRock | 7,940,503 | $126M | Added 10.24% |
| Vanguard | 5,316,133 | $85M | Added 7.29% |
| Ameriprise Financial | 4,486,433 | $71M | Reduced 20.22% |
| Dimensional Fund Advisors | 3,641,547 | $58M | Reduced 8.59% |
| American Century Companies | 3,128,652 | $50M | Added 2.79% |
Form 13F is a quarterly report that institutional investment managers with at least $100 million in qualifying securities file with the SEC. It lists long positions as of the last day of the quarter and is due within 45 days of quarter end, so these holdings describe that date rather than today.
Frequently asked questions
What is NPKI?
NPK International Inc. (NPKI) is listed on the New York Stock Exchange, where it has traded since September 6, 1990.
Who are the largest institutional holders of NPKI?
In 13F filings for the quarter ended June 30, 2026, the largest reported holders of NPKI were BlackRock, Vanguard and Ameriprise Financial.
How many institutions own NPKI?
247 institutions reported a position in NPKI for the quarter ended June 30, 2026, worth $1.2 billion in total.
Did institutions buy or sell NPKI last quarter?
Of the 5 largest reported holders, 3 added shares and 2 reduced their positions during the quarter. Every reported holder and its change is on the SentiSense ownership page for NPKI.
Every reported institutional holder, plus insider and congressional trades in NPKI, on SentiSense.