← United States · Coverage record
US · SEC FORM 4
Knife River Corp
KNF · NYSE · CIK 0001955520 · Basic Materials · Building Materials
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
6 Form 4 transaction lines observed in the same window
0 sales · 6 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
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Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-02-29 · Gray Brian R..
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 4,464,180
- Previous report
- 4,506,854
- Avg daily volume
- 1,279,596
- Days to cover
- 3.5
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2024-02-29 | Gray Brian R. | Purchase (P) | Common Stock - 401(k) | 1 | USD 73.65 | USD 74 | SEC filing ↗ |
Form 4 evidence
23 transaction lines in the latest 365-day window; 76 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-05-20 | SANDBROOK WILLIAM J | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | MOSS PATRICIA L | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Hill Thomas W. | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (19 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-05-20 | SANDBROOK WILLIAM J | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | MOSS PATRICIA L | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Hill Thomas W. | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Fagg Karen B | Award / grant (A) | Common Stock | 2,380 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Chiodo Patricia | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Carmona-Alvarez German | Award / grant (A) | Common Stock | 2,040 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-06 | Gray Brian R. | Award / grant (A) | Common Stock | 20,955 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Ring Nathan W | Award / grant (A) | Common Stock | 5,211 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Pladsen Glenn R. | Award / grant (A) | Common Stock | 2,950 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Liepitz Karl A | Award / grant (A) | Common Stock | 4,611 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | LaChapelle Sarah L. | Award / grant (A) | Common Stock | 2,713 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Kadrmas Marney L. | Award / grant (A) | Common Stock | 1,199 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Hastings Trevor J | Award / grant (A) | Common Stock | 6,130 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-12 | Ring Nathan W | Tax withholding (F) | Common Stock | 6,258 | USD 81.74 | USD 511,529 | SEC filing ↗ |
| 2026-02-12 | Pladsen Glenn R. | Tax withholding (F) | Common Stock | 2,954 | USD 81.74 | USD 241,460 | SEC filing ↗ |
| 2026-02-12 | Liepitz Karl A | Tax withholding (F) | Common Stock | 8,648 | USD 81.74 | USD 706,888 | SEC filing ↗ |
| 2026-02-12 | Kadrmas Marney L. | Tax withholding (F) | Common Stock | 1,232 | USD 81.74 | USD 100,704 | SEC filing ↗ |
| 2026-02-12 | Hastings Trevor J | Tax withholding (F) | Common Stock | 7,479 | USD 81.74 | USD 611,333 | SEC filing ↗ |
| 2026-02-12 | Gray Brian R. | Tax withholding (F) | Common Stock | 29,644 | USD 81.74 | USD 2,423,101 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | KNF |
| CIK | 0001955520 |
| Sector | Basic Materials |
| Industry | Building Materials Yahoo Finance |
| SEC SIC | 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels) |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 76 transaction lines from 2023-05-31 to 2026-05-20 1 P purchase lines · 0 S sale lines · 75 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.