# NPK INTERNATIONAL INC COM SHS

NPK INTERNATIONAL INC COM SHS is a security (CUSIP 651718504) tracked across SEC portfolio filings. 250 institutional managers reported $1.0B on Form 13F as of 2026-06-30; 21 registered fund positions totaling $77.4M via N-PORT as of 2026-05-31.

## Summary

- Issuer: NPK INTERNATIONAL INC
- Class: COM SHS
- CUSIP: 651718504
- Asset category: EC
- 13F holders: 250
- 13F value: $1.0B
- 13F period: 2026-06-30
- N-PORT fund positions: 21
- N-PORT value: $77.4M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 250 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $104.4M | 7,202,705 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $57.7M | 3,983,658 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $56.1M | 4,706,012 |
| [WASATCH ADVISORS LP](https://search.stillhousedata.com/firm/6081) | SALT LAKE CITY, UT | $44.7M | 2,811,593 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $44.1M | 3,043,763 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $32.5M | 2,244,164 |
| [ROYCE & ASSOCIATES LP](https://search.stillhousedata.com/firm/107689) | New York, NY | $30.0M | 2,071,010 |
| STATE STREET CORP | BOSTON, MA | $28.3M | 1,955,319 |
| MORGAN STANLEY | NEW YORK, NY | $26.4M | 1,823,060 |
| [PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC.](https://search.stillhousedata.com/firm/117962) | EDINA, MN | $26.4M | 1,818,790 |
| [EMERALD ADVISERS, LLC](https://search.stillhousedata.com/firm/107496) | LEOLA, PA | $25.0M | 1,573,597 |
| PRUDENTIAL FINANCIAL INC | NEWARK, NJ | $24.4M | 1,686,629 |
| [MASSACHUSETTS FINANCIAL SERVICES CO /MA/](https://search.stillhousedata.com/firm/110045) | Boston, MA | $23.1M | 1,452,984 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | BOSTON, MA | $22.3M | 1,539,088 |
| Russell Investments Group, Ltd. | Seattle, WA | $22.2M | 1,394,632 |

## Top fund holders (N-PORT)

_Showing 15 of 21 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Thrivent Small-Mid Cap Equity ETF](https://search.stillhousedata.com/fund/S000075337) | Thrivent ETF Trust | $17.1M | 198.73% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $13.6M | 1.67% |
| ROYCE MICRO-CAP TRUST, INC. | ROYCE MICRO-CAP TRUST, INC. | $9.1M | 131.55% |
| [Oberweis Micro-Cap Fund](https://search.stillhousedata.com/fund/S000010231) | OBERWEIS FUNDS | $7.2M | 68.50% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $6.9M | 9.26% |
| [Ancora/Thelen Small-Mid Cap Fund](https://search.stillhousedata.com/fund/S000039307) | ANCORA TRUST | $6.6M | 314.00% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $6.1M | 3.49% |
| [Embark Small Cap Equity Fund](https://search.stillhousedata.com/fund/S000083503) | Harbor Funds II | $2.6M | 45.43% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $2.0M | 4.13% |
| [Perritt MicroCap Opportunities Fund](https://search.stillhousedata.com/fund/S000039929) | Perritt Funds Inc | $1.7M | 265.93% |
| [Russell Investments U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000089990) | Russell Investments Exchange Traded Funds | $1.4M | 277.29% |
| [VANGUARD U.S. MOMENTUM FACTOR ETF](https://search.stillhousedata.com/fund/S000061302) | VANGUARD WELLINGTON FUND | $983K | 5.35% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $624K | 0.11% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $611K | 6.20% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $571K | 0.19% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/651718504.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.