NPK International Inc. (NPKI) Ownership
NPKI ownership summary
as of October 18, 2026- Institutions
- 94.5% of shares outstanding
- Insiders
- 4.60% of shares outstanding
- Shares outstanding
- 84.9M
- Float
- 80.7M shares available to trade
- Short interest
- 3.01% 2.5M shares short
- Days to cover
- 3.10 short interest down 23.7% vs prior month
- Institutions 94.51%
- Insiders 4.60%
- Other investors 0.89%
NPKI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 9.35% | 7.9M | $85.5M | +737,798 (+10.2%) | June 30, 2026 |
| 2 | Ameriprise Financial Inc | 5.28% | 4.5M | $48.3M | −1.1M (−20.2%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 4.29% | 3.6M | $39.2M | −342,111 (−8.6%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.25% | 3.6M | $38.8M | +179,881 (+5.3%) | June 30, 2026 |
| 5 | American Century Companies Inc | 3.68% | 3.1M | $33.7M | +84,889 (+2.8%) | June 30, 2026 |
| 6 | Wasatch Advisors LP | 3.31% | 2.8M | $30.3M | −87,428 (−3.0%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.79% | 2.4M | $25.5M | +125,550 (+5.6%) | June 30, 2026 |
| 8 | Royce & Associates, LP | 2.53% | 2.1M | $23.1M | +78,090 (+3.8%) | June 30, 2026 |
| 9 | State Street Corp | 2.37% | 2.0M | $21.7M | +59,384 (+3.0%) | June 30, 2026 |
| 10 | Punch & Associates Inv Mgmt Inc | 2.05% | 1.7M | $18.7M | −79,933 (−4.4%) | June 30, 2026 |
| 11 | Emerald Advisers, LLC | 1.85% | 1.6M | $16.9M | +1.6M (0.0%) | June 30, 2026 |
| 12 | Thrivent Financial For Lutherans | 1.78% | 1.5M | $16.3M | −152,261 (−9.1%) | June 30, 2026 |
| 13 | Massachusetts Financial Services Company | 1.71% | 1.5M | $15.6M | +1.5M (0.0%) | June 30, 2026 |
| 14 | Arnhold & S. Bleichroeder Advisers, LLC | 1.70% | 1.4M | $15.5M | +1.2M (+426.6%) | June 30, 2026 |
| 15 | Morgan Stanley - Brokerage Accounts | 1.48% | 1.3M | $13.6M | −563,628 (−30.9%) | June 30, 2026 |
| 16 | Electron Capital Partners, LLC | 1.38% | 1.2M | $12.6M | +69,361 (+6.3%) | June 30, 2026 |
| 17 | Loomis, Sayles & Company LP | 1.36% | 1.2M | $12.4M | −27,359 (−2.3%) | June 30, 2026 |
| 18 | Arrowstreet Capital Limited Partnership | 1.34% | 1.1M | $12.2M | −404,536 (−26.3%) | June 30, 2026 |
| 19 | Prudential Financial Inc | 1.31% | 1.1M | $12.0M | −570,250 (−33.8%) | June 30, 2026 |
| 20 | Qube Research & Technologies | 1.29% | 1.1M | $11.8M | −42,565 (−3.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 5.5M shares and 10 cut 3.4M.
NPKI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.01% | 2.6M | $27.5M | — | August 31, 2026 |
| 2 | CT (Lux) American Smaller Com 9U USD | 2.88% | 2.4M | $26.4M | +52,279 (+2.2%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.50% | 2.1M | $22.9M | −24,512 (−1.1%) | September 30, 2026 |
| 4 | Avantis US Small Cap Value ETF | 2.14% | 1.8M | $19.5M | — | September 30, 2026 |
| 5 | CT American Smaller Coms(US) InstAccGBP | 1.77% | 1.5M | $16.2M | +25,299 (+1.7%) | August 31, 2026 |
| 6 | Wasatch Micro Cap | 1.61% | 1.4M | $14.7M | — | June 30, 2026 |
| 7 | MFS New Discovery I | 1.46% | 1.2M | $13.4M | +180,941 (+17.1%) | August 31, 2026 |
| 8 | Thrivent Small-Mid Cap Equity ETF | 1.24% | 1.1M | $11.3M | −76,664 (−6.8%) | August 31, 2026 |
| 9 | Fidelity Small Cap Index | 1.07% | 905K | $9.7M | +7,390 (+0.8%) | July 31, 2026 |
| 10 | Emerald Growth A | 1.04% | 887K | $9.6M | +111,241 (+14.3%) | August 31, 2026 |
| 11 | Calamos Timpani Small Cap Growth I | 0.99% | 843K | $9.1M | −146,124 (−14.8%) | August 31, 2026 |
| 12 | First Eagle Small Cap Opportunity I | 0.92% | 783K | $8.4M | +60,022 (+8.3%) | August 31, 2026 |
| 13 | iShares Russell 2000 Growth ETF | 0.91% | 772K | $8.3M | −977 (−0.1%) | September 30, 2026 |
| 14 | Wasatch Micro Cap Value | 0.91% | 769K | $8.3M | — | June 30, 2026 |
| 15 | DFA US Targeted Value I | 0.75% | 638K | $6.9M | — | August 31, 2026 |
| 16 | Invesco Building & Construction ETF | 0.74% | 626K | $6.7M | −1,803 (−0.3%) | September 1, 2026 |
| 17 | Royce Micro-Cap Trust | 0.74% | 625K | $6.7M | — | June 30, 2026 |
| 18 | Nuveen Quant Small Cap Equity R6 | 0.71% | 606K | $6.5M | +185,500 (+44.1%) | August 31, 2026 |
| 19 | Oberweis Micro-Cap | 0.67% | 567K | $6.1M | +70,300 (+14.2%) | June 30, 2026 |
| 20 | Royce Small-Cap Opportunity Invmt | 0.66% | 557K | $6.0M | −2,831 (−0.5%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
NPKI insider transactions
latest 14| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-09 | Gregg Piontek | Sell | $15.04 | 15,000 | $225,600 |
| 2026-04-01 | Gregg Piontek | Sell | $14.51 | 35,000 | $507,850 |
| 2026-03-16 | Mary Celeste Fruge | Sell | $13.56 | 1,000 | $13,560 |
| 2026-03-04 | Gregg Piontek | Sell | $14.07 | 108,590 | $1.5M |
| 2026-02-23 | Michael A Lewis | Sell | $14.31 | 2,013 | $28,806 |
| 2025-11-24 | Michael A Lewis | Sell | $12.00 | 2,013 | $24,156 |
| 2025-09-03 | Matthew Lanigan | Sell | $10.38 | 1,000 | $10,380 |
| 2025-08-25 | Michael A Lewis | Sell | $10.33 | 2,013 | $20,794 |
| 2025-08-22 | Matthew Lanigan | Sell | $10.34 | 68,896 | $712,385 |
| 2025-08-11 | Lori Briggs | Sell | $9.51 | 8,005 | $76,128 |
| 2025-07-09 | Lori Briggs | Sell | $8.57 | 8,005 | $68,603 |
| 2025-06-16 | Michael A Lewis | Sell | $8.60 | 2,013 | $17,312 |
| 2025-06-06 | Lori Briggs | Sell | $8.38 | 9,704 | $81,320 |
| 2025-05-08 | Joseph A Cutillo | Buy | $8.00 | 12,500 | $100,000 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
NPKI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns NPKI
Institutional investors own 94.5% of NPK International's shares and insiders 4.60%. The largest holder is BlackRock Inc with 9.35% of the shares (7.9M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 3.01% of the float, or 3.10 days of average trading volume. The share count fell 14.1% since 2014.
Related: NPKI analyst forecast, NPKI key metrics. See the NPKI stock overview for the latest quote and news.
NPKI ownership FAQ
Who owns the most NPK International stock?
The largest shareholders of NPK International are BlackRock Inc (9.35%), Ameriprise Financial Inc (5.28%), Dimensional Fund Advisors, Inc. (4.29%), Vanguard Capital Management, LLC (4.25%), American Century Companies Inc (3.68%).
What percentage of NPK International is owned by institutions?
Institutions hold 94.5% of NPK International's shares outstanding; insiders hold 4.60%.
Which funds own NPK International?
The largest fund holders of NPK International are Vanguard MStar Total Stk Mkt Idx Invest (3.01%), CT (Lux) American Smaller Com 9U USD (2.88%), iShares Russell 2000 ETF (2.50%), Avantis US Small Cap Value ETF (2.14%), CT American Smaller Coms(US) InstAccGBP (1.77%).
What is NPK International's short interest?
2.5M shares of NPK International were sold short, 3.01% of the float; at the average daily volume it would take 3.10 days to cover.
Are insiders buying or selling NPK International?
Of the latest 14 reported insider transactions in NPK International (since May 8, 2025), 1 were purchases and 13 were sales.
How many shares of NPK International are outstanding?
NPK International has 84.9M shares outstanding, of which 80.7M are in the public float.