NPK INTERNATIONAL INC (NPKI): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in NPKI · Energy. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
22
13F filers
Aggregate Value
$134.9M
Across holders
Last Price
$13.16
2026-08-24
Sector
Energy
GICS
Quarterly fund activity10 increased11 reduced2 exited
Full exits: Man Group plc, Walleye Capital LLC
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 0001164508 | Hedge Fund | 1.13M | $18.1M | 13.4% | 0.0% | Reduced | $-6.4M | Q2 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 1.10M | $17.5M | 13.0% | 0.0% | Reduced | $-677K | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 1.05M | $16.7M | 12.4% | 0.0% | Added | +$14.2M | Q2 2026 |
| First Eagle Investment Management, LLC CIK 0001325447 | Institutional Manager | 721K | $11.5M | 8.5% | 0.0% | Added | +$7.1M | Q2 2026 |
| AXIOM INVESTORS LLC /DE CIK 0001109147 | Hedge Fund | 696K | $11.1M | 8.2% | 0.1% | Reduced | $-665K | Q2 2026 |
| Ancora Advisors, LLC CIK 0001446114 | Hedge Fund | 679K | $10.8M | 8.0% | 0.2% | Reduced | $-12.0M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 559K | $8.9M | 6.6% | 0.0% | Reduced | $-8.0M | Q2 2026 |
| ArrowMark Colorado Holdings LLC CIK 0001483859 | Hedge Fund | 400K | $6.4M | 4.7% | 0.3% | Reduced | $-2.6M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 364K | $5.8M | 4.3% | 0.0% | Added | +$4.8M | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 336K | $5.3M | 4.0% | 0.0% | Added | +$4.0M | Q2 2026 |
Reduced
Hedge Fund
$18.1M· 13.4% of total· 0.0% port· 1.13M sh· $-6.4M QoQ· Q2 2026
Reduced
Hedge Fund
$17.5M· 13.0% of total· 0.0% port· 1.10M sh· $-677K QoQ· Q2 2026
Added
Hedge Fund
$16.7M· 12.4% of total· 0.0% port· 1.05M sh· +$14.2M QoQ· Q2 2026
Added
Institutional Manager
$11.5M· 8.5% of total· 0.0% port· 721K sh· +$7.1M QoQ· Q2 2026
Reduced
Hedge Fund
$11.1M· 8.2% of total· 0.1% port· 696K sh· $-665K QoQ· Q2 2026
Reduced
Hedge Fund
$10.8M· 8.0% of total· 0.2% port· 679K sh· $-12.0M QoQ· Q2 2026
Reduced
Hedge Fund
$8.9M· 6.6% of total· 0.0% port· 559K sh· $-8.0M QoQ· Q2 2026
Reduced
Hedge Fund
$6.4M· 4.7% of total· 0.3% port· 400K sh· $-2.6M QoQ· Q2 2026
Added
Hedge Fund
$5.8M· 4.3% of total· 0.0% port· 364K sh· +$4.8M QoQ· Q2 2026
Added
Hedge Fund
$5.3M· 4.0% of total· 0.0% port· 336K sh· +$4.0M QoQ· Q2 2026
Added
Hedge Fund
$5.2M· 3.9% of total· 0.0% port· 328K sh· +$4.5M QoQ· Q2 2026
Added
Hedge Fund
$4.9M· 3.6% of total· 0.0% port· 306K sh· +$4.7M QoQ· Q2 2026
Reduced
Hedge Fund
$3.6M· 2.7% of total· 0.0% port· 225K sh· $-2.2M QoQ· Q2 2026
Reduced
Institutional Manager
$3.4M· 2.5% of total· 0.0% port· 213K sh· $-317K QoQ· Q2 2026
Reduced
Hedge Fund
$1.9M· 1.4% of total· 0.0% port· 122K sh· $-253K QoQ· Q2 2026
Added
Hedge Fund
$1.2M· 0.9% of total· 0.0% port· 73K sh· +$996K QoQ· Q2 2026
Reduced
Hedge Fund
$961K· 0.7% of total· 0.0% port· 60K sh· $-3.9M QoQ· Q2 2026
Added
Hedge Fund
$734K· 0.5% of total· 0.0% port· 46K sh· — QoQ· Q2 2026
Added
Hedge Fund
$494K· 0.4% of total· 0.0% port· 31K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$265K· 0.2% of total· 0.0% port· 17K sh· $-277K QoQ· Q2 2026
Added
Hedge Fund
$174K· 0.1% of total· 0.0% port· 11K sh· — QoQ· Q2 2026
Unchanged
Hedge Fund
$113K· 0.1% of total· 0.0% port· 7K sh· $-68K QoQ· Q2 2026
1–10 of 22
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