NPK International Inc.
Total Trades
14
Buys
2
Sells
9
Largest Trade
$1M+
Insiders
6
Institutional Funds
178
Inst. Value
$1M+
Activist Filings
21
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Piontek Gregg | Senior Vice Presid… | EXERCISE | $100K–$500K | 74K | $4.32 | Mar 5, 2026 |
| Piontek Gregg | Senior Vice Presid… | SELL | $1M+ | 109K | $14.07 | Mar 5, 2026 |
| Lewis Michael A | Director | SELL | $15K–$50K | 2K | $14.31 | Feb 25, 2026 |
| Lewis Michael A | Director | SELL | $15K–$50K | 2K | $12.00 | Nov 25, 2025 |
| LANIGAN MATTHEW | President & CEO | SELL | $1K–$15K | 1K | $10.38 | Sep 4, 2025 |
| LANIGAN MATTHEW | President & CEO | EXERCISE | $1K–$15K | 1K | $4.32 | Sep 4, 2025 |
| Lewis Michael A | Director | SELL | $15K–$50K | 2K | $10.33 | Aug 26, 2025 |
| LANIGAN MATTHEW | President & CEO | SELL | $500K+ | 69K | $10.34 | Aug 26, 2025 |
| LANIGAN MATTHEW | President & CEO | EXERCISE | $100K–$500K | 69K | $4.32 | Aug 26, 2025 |
| Briggs Lori | VP & President | SELL | $50K–$100K | 8K | $8.57 | Jul 10, 2025 |
| Lewis Michael A | Director | SELL | $15K–$50K | 2K | $8.60 | Jun 17, 2025 |
| Briggs Lori | VP & President | SELL | $50K–$100K | 10K | $8.38 | Jun 10, 2025 |
| Meer Claudia Michel | Director | BUY | $15K–$50K | 4K | $7.92 | May 20, 2025 |
| CUTILLO JOSEPH A | Director | BUY | $50K–$100K | 13K | $8.00 | May 8, 2025 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 178 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 4.2M | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 3.1M | $1M+ | SH |
| WASATCH ADVISORS LP | 2.2M | $1M+ | SH |
| ROYCE & ASSOCIATES LP | 2.2M | $1M+ | SH |
| STATE STREET CORP | 2.0M | $1M+ | SH |
| PRUDENTIAL FINANCIAL INC | 1.7M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.7M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | $1M+ | SH |
| LOOMIS SAYLES & CO L P | 1.1M | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.1M | $1M+ | SH |
| Pennant Select, LLC | 1.0M | $1M+ | SH |
| ArrowMark Colorado Holdings LLC | 978K | $1M+ | SH |
| Tieton Capital Management, LLC | 801K | $1M+ | SH |
| PANAGORA ASSET MANAGEMENT INC | 669K | $1M+ | SH |
| FIRST SABREPOINT CAPITAL MANAGEMENT LP | 650K | $1M+ | SH |
| Roubaix Capital, LLC | 575K | $1M+ | SH |
| Uniplan Investment Counsel, Inc. | 561K | $1M+ | SH |
| Point72 Asset Management, L.P. | 537K | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 519K | $1M+ | SH |
| Allianz Asset Management GmbH | 501K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Nov 14, 2025
6.2%
5.2M shares
SC 13G/A · Oct 9, 2025
5.7%
4.8M shares
SC 13G/A · May 15, 2025
7.7%
6.7M shares
Ameriprise Financial, Inc. IRS No. 13-3180631
SC 13G/A · Nov 14, 2024
8.9%
7.7M shares
The Conversant Opportunity Master Fund LP
SC 13G/A · Feb 14, 2024
5.2%
4.5M shares
Ameriprise Financial, Inc. IRS No. 13-3180631
SC 13G/A · Feb 14, 2024
7.5%
6.4M shares
SC 13G/A · Jan 26, 2024
7.3%
6.2M shares
The Conversant Opportunity Master Fund LP
SC 13G · Oct 13, 2023
5.1%
4.5M shares
SC 13D/A · Oct 4, 2023
1.0%
450K shares
SC 13D/A · Aug 25, 2023
1.0%
590K shares
SC 13D/A · Jul 25, 2023
1.0%
840K shares
Ameriprise Financial, Inc. IRS No. 13-3180631
SC 13G/A · Mar 10, 2023
10.2%
9.1M shares
SC 13G/A · Jan 31, 2023
6.6%
6.2M shares
Ameriprise Financial, Inc. IRS No. 13-3180631
SC 13G/A · Jan 10, 2023
9.7%
9.1M shares
SC 13D/A · Aug 31, 2022
1.1%
1.1M shares
SC 13G · Jul 18, 2022
5.2%
4.8M shares
SC 13D/A · Jul 6, 2022
1.0%
594K shares
SC 13D/A · Apr 21, 2022
1.0%
541K shares
SC 13D/A · Feb 22, 2022
1.0%
235K shares
Ameriprise Financial, Inc. IRS No. 13-3180631
SC 13G/A · Feb 14, 2022
15.3%
14.1M shares
SC 13G/A · Jan 31, 2022
7.0%
6.4M shares