TOP TIERMARKET NEWSWIRE
Movers explained · November 9, 2026

Why Is KNIFE RIV CORP (KNF) Stock Moving Today?

By the Top Tier Newswire AI Desk · September 24, 2026 at 10:01 AM ET · reviewed against 0 wire stories

KNIFE RIV CORP (KNF) is drawing unusual attention today.

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KNF stock is up 4.99% at $54.00 as activist investor Starboard Value has reportedly built a significant stake and is pushing for strategic changes at Knife River. The stock opened with a 5.0% gap up, driven by a Wall Street Journal report that Starboard is urging the company to explore a sale or improve its margins. Oppenheimer has lowered its price target for KNF to $80 from $90, while other analysts have expressed caution or skepticism about the company’s path to profitability.

What Happened

Starboard Value delivered a letter to Knife River’s CEO and board, criticizing the company’s failure to meet promised margin improvements and arguing it has fallen behind peers. The activist investor is calling for a strategic review and a path to achieving 22% adjusted EBITDA margins by fiscal year 2029. The Wall Street Journal reported that Starboard has taken a “significant” position in the company and is pushing for a sale or operational turnaround. This news has triggered a sharp intraday rally, with KNF reaching a session high of $54.13 shortly after the market opened.

What The Data Shows

KNF opened at $54.00, a 5.0% gap up from the previous close of $51.43. The stock has traded between $52.72 and $54.13 during the session, with a last price of $53.83. Volume so far is 0.2 million shares, or 0.3 times the 3-month daily average. The stock has also printed one fresh 52-week low and three 52-week highs on September 24. Knife River has a market cap of $3.1 billion, a P/E ratio of 22.5, and trailing twelve-month revenue growth of 12.1%. Its net margin is 4.2%, and it has a beta of 0.52.

What To Watch

The company is scheduled to hold its Q2 2026 earnings call, which may provide further insight into its strategic direction and performance. Investors should also monitor the breadth of analyst coverage and any follow-up from Starboard Value.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

KNF by the numbers

Mkt cap: $3.1BP/E: 22.552w: $50.66 to $96.28
KNF · Sep 24 session (5-min) · +3.77% vs prior close · updated 8:44 PM ET
$51.27$52.78$54.30prev close $51.43$53.377:25 AM10:18 AM1:12 PM4:06 PM7:00 PM7:25 AM · $54.007:45 AM · $54.007:50 AM · $53.958:10 AM · $53.878:25 AM · $53.669:10 AM · $53.739:30 AM · $53.349:35 AM · $53.159:40 AM · $53.009:45 AM · $53.139:50 AM · $53.599:55 AM · $53.9910:00 AM · $53.8310:05 AM · $53.8210:10 AM · $53.9110:15 AM · $53.5610:20 AM · $53.7510:25 AM · $53.7810:30 AM · $53.0310:35 AM · $53.4210:40 AM · $53.3110:45 AM · $53.4410:50 AM · $53.6910:55 AM · $54.1311:00 AM · $54.0111:05 AM · $53.8511:10 AM · $53.5511:15 AM · $53.5111:20 AM · $53.3111:25 AM · $53.1311:30 AM · $52.8311:35 AM · $53.0211:40 AM · $52.7711:45 AM · $52.7711:50 AM · $52.6811:55 AM · $52.8412:00 PM · $52.8212:05 PM · $52.9112:10 PM · $52.8912:15 PM · $53.5412:20 PM · $53.4812:25 PM · $53.3012:30 PM · $53.1812:35 PM · $53.0712:40 PM · $53.1612:45 PM · $52.9412:50 PM · $52.9312:55 PM · $52.971:00 PM · $52.871:05 PM · $53.381:10 PM · $53.521:15 PM · $53.471:20 PM · $53.461:25 PM · $53.371:30 PM · $53.331:35 PM · $53.361:40 PM · $53.261:45 PM · $53.301:50 PM · $53.141:55 PM · $53.262:00 PM · $53.002:05 PM · $53.412:10 PM · $53.432:15 PM · $53.162:20 PM · $52.882:25 PM · $52.762:30 PM · $52.492:35 PM · $52.882:40 PM · $52.782:45 PM · $52.762:50 PM · $52.932:55 PM · $53.123:00 PM · $53.033:05 PM · $53.253:10 PM · $52.843:15 PM · $52.793:20 PM · $52.693:25 PM · $52.663:30 PM · $52.893:35 PM · $53.183:40 PM · $53.213:45 PM · $53.443:50 PM · $53.843:55 PM · $53.374:00 PM · $53.374:10 PM · $53.374:40 PM · $53.376:30 PM · $53.377:00 PM · $53.37

The headlines behind the move

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Earlier KNF move explainers: 2026-09-24