Latest filingSep 10, 2026Most recent Form 4
NPKI
NPK International Inc.
NYSEConsumer DiscretionaryServices-Miscellaneous Equipment Rental & Leasing
Insider activity for last month from 08/11 to 09/11. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$20.3M3 sells
Net open-market-$20.3M3 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period3transactions
- S · Open-market sells · dominant3 · 100%
Activity by reported role
A joint filing can contribute to multiple roles3transactions
- Director · dominant2 · 67%
- CAO1 · 33%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeLewis Michael ACommon Stock · Direct
135,865Aug 17, 2026
Robeson Rose MCommon Stock · Direct
215,147Aug 27, 2026
Warren Matthew JamesCommon Stock · Direct
51,439Sep 09, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 11 → Sep 11
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Top insiders
By absolute net value across the selected period- RM-$134.9k
- WJ-$40.1k
- LA-$28.7k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
NPKI transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| NPKI | Warren Matthew James | CAO | sale10b5-1 | 2.99k | -$4.01M | S | — | 0.0% | 09/10 | 09/09 |
| NPKI | ROBESON ROSE M | DIR | sale10b5-1 | 10.0k | -$13.4M | S | 0.0% | 08/31 | 08/27 | |
| NPKI | Lewis Michael A | DIR | sale10b5-1 | 2.01k | -$2.87M | S | −5.8% | 08/19 | 08/17 |
NPK International Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at NPK International Inc.?
Warren Matthew James, ROBESON ROSE M, Lewis Michael A.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Warren Matthew James reported a sale on Sep 09, 2026 valued at $4.01M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $203,735.08. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.