Ten companies fell sharply on Thursday, defying an overall market optimism, as investors digested mostly corporate earnings and disappointing outlooks for the rest of the year. Of the firms in the list, two fell to an all-time low, while one was just a few cents shy of its lowest 52-week price.

Meanwhile, Wall Street’s main indices all finished in the green, led by Nasdaq, up 0.89 percent, followed by the S&P 500, rising 0.58 percent, and the Dow Jones, growing 0.31 percent.

In this article, we spotlight the 10 worst performers on Thursday and break down the reasons behind their drop.

To come up with the list, we focused on companies with more than $2 billion in market capitalization and 5 million shares in trading volume.

10. Southwest Airlines Co. (NYSE:LUV)

Southwest Airlines declined by 6.25 percent on Thursday to finish at $31.65 apiece after reporting a dismal earnings performance in the third quarter of the year.

In an updated report, Southwest Airlines Co. (NYSE:LUV) said net income during the period dropped by 19.4 percent to $54 million from $67 million in the same period last year, while total operating revenues inched up by only 1.1 percent to $6.95 billion from $6.87 billion year-on-year.

Despite the results, Southwest Airlines Co. (NYSE:LUV) maintained its EBIT outlook for full-year 2025 at $600 million to $800 million.

For the fourth quarter alone, the company expects available seat miles (ASM) to increase by 6 percent, while operating revenues per ASM (RASM) are expected to grow between 1 and 3 percent.

Commenting on the results, Southwest Airlines Co. (NYSE:LUV) President and CEO Bob Jordan said he was pleased with the company’s results, which are expected to ramp up in the fourth quarter of the year and into next year.

“And while early, indicators for our new assigned and extra legroom seating products are in line with expectations. We are encouraged by our momentum and confident in our direction. Our people continue to lead the way, and I couldn’t be more excited about 2026 and beyond,” he noted.

9. Energy Fuels Inc. (NYSEAmerican:UUUU)

Energy Fuels dropped its share prices by 6.51 percent on Thursday to end at $21.26 apiece as investors repositioned portfolios ahead of the release of its third quarter earnings performance.

In an updated report, Energy Fuels Inc. (NYSEAmerican:UUUU) said it is scheduled to announce its financial and operating highlights during market hours on November 4, 2025. A conference call will be held to elaborate on the results.

In other developments, Energy Fuels Inc. (NYSEAmerican:UUUU) said it secured the backing of Export Finance Australia for an A$80 million ($52.1 million) financing support for the development of its A$520 million Donald Rare Earth project, as well as the Mineral Sands development.

Energy Fuels Inc. (NYSEAmerican:UUUU) said it expects to raise more funds from a 50:50 combination of debt and equity from Export Credit Agencies and senior lenders.

Already set for groundbreaking, the Donald Project is expected to be one of Australia’s most advanced sources of rare earth elements. Materials will then be shipped to the company’s mineral processing facility in the US for production of advanced REE materials and zircon-rich heavy mineral concentrates for global supply chains.

The project is targeted for full operations in the second half of 2027, subject to project financing and completion of a final investment decision.

8. Knight-Swift Transportation Holdings Inc. (NYSE:KNX)

Knight-Swift extended its losing streak to a third straight session on Thursday as investor sentiment was dented by a 74.2 percent slump in attributable net income in the third quarter of the year.

During the period, Knight-Swift Transportation Holdings Inc. (NYSE:KNX) said net income fell to $7.86 million from $30.46 million, despite total revenues inching up by 2.7 percent to $1.93 billion from $1.88 billion year-on-year.

The current quarter included $34.8 million of impairment charges, a loss contingency amounting to $11.2 million related to the 2024 exit from the third-party carrier insurance business, and $12 million of higher insurance and claims costs at US Xpress, primarily driven by the settlement of two large 2023 US Xpress auto liability claims.

“While volumes have remained stable in our truckload business, the industry is still dealing with an oversupply of capacity that has been gradually exiting the market. We have remained focused on reducing our costs and providing a high level of service to position our brands to support our customers with one-way over-the-road capacity at scale while offering robust dedicated solutions,” said Knight-Swift Transportation Holdings Inc. (NYSE:KNX) CEO Adam Miller.

“The market balance between supply and demand has remained challenging to carriers, [but] we believe there are several potential catalysts that may accelerate the exit of capacity over the next few quarters,” he said, referring to the enforcement of English language proficiency requirement, and enhancement of qualifications and controls for the issuance and renewal of non-domiciled Commercial Driver’s Licenses, among others.

7. Iridium Communications Inc. (NASDAQ:IRDM)

Iridium Communications snapped a three-day winning streak on Thursday, shedding 7.48 percent to close at $18.19 apiece as investors soured on its tempered growth outlook for the rest of the year.

Despite improved earnings performance during the third quarter, Iridium Communications Inc. (NASDAQ:IRDM) said it now expects total service revenues to grow by 3 percent, lower than the previous 3 to 5 percent expectations.

Full-year operational EBITDA, on the other hand, was pegged at $495 million to $500 million, representing a growth in the lower end guidance of $490 million.

In the past quarter, Iridium Communications Inc. (NASDAQ:IRDM) net income increased by 54 percent to $37 million from $24 million in the same period last year.

Total revenues grew by 6.6 percent to $226.9 million from $212.77 million year-on-year, on the back of a 3-percent jump in service revenues, which constituted 73 percent of the total figure.

Iridium Communications Inc. (NASDAQ:IRDM) ended the quarter with 2.5 million billable subscribers, up by 2.42 percent from the 2.48 million a year earlier.

6. Super Micro Computer, Inc. (NASDAQ:SMCI)

Super Micro extended losses to a third day on Thursday, shedding 8.72 percent to close at $47.92 apiece as investors sold off positions following weak preliminary results that missed its own previous guidance.

In a statement, Super Micro Computer, Inc. (NASDAQ:SMCI) announced that it would likely report $5 billion in revenues for the first quarter of fiscal year 2026, lower than the $6 billion to $7 billion as expected previously.

The company said “design win upgrades” pushed some expected revenues in the first quarter to add up to the second quarter of the fiscal period.

“Supermicro is seeing outstanding levels of customer engagement for newly released AI liquid cooled solutions, along with numerous key customers ramping large, multi-quarter, volume deployments. We see customer demand accelerating, and we are gaining AI share, reiterating revenue of at least [$33 billion] for [fiscal year] 2026 with the expectation of delivering more,” said Super Micro Computer, Inc. (NASDAQ:SMCI) President and CEO Charles Liang.

Official results are scheduled to be released after market close on November 4, 2025.

5. Ramaco Resources, Inc. (NASDAQ:METC)

Ramaco Resources fell for a third day on Thursday, shedding 9.57 percent to end at $36.01 apiece as investors continued to unload portfolios ahead of the release of its third quarter earnings performance next week.

In an updated report, Ramaco Resources, Inc. (NASDAQ:METC) said it would announce the results of its financial and operating highlights after market close on Monday, October 27, to be followed by a conference call on Tuesday, October 28.

In other news, Ramaco Resources, Inc. (NASDAQ:METC) announced the start of the development of its new pilot processing plant and laboratory in Sheridan, Wyoming.

The facility is expected to produce high-purity individual rare earth oxides, which are essential for US magnet production and other advanced technologies, in support of domestic production following the recent exports restriction policy in China.

Ramaco Resources, Inc. (NASDAQ:METC) earlier this year announced a $6.1 million grant from the Wyoming Energy Authority’s Energy Matching Fund to support the development of the said site.

“We believe this groundbreaking [milestone] marks the beginning of a new chapter in American rare earth minerals. Our goal is to build the foundation for a secure, domestic supply of rare earths and critical minerals and ensure that the U.S. remains competitive in the technologies that define our future,” Chairman and CEO Randall Atkins said.

4. STMicroelectronics NV (NYSE:STM)

STMicroelectronics fell by 13.26 percent on Thursday to close at $25.26 apiece after reporting a disappointing earnings performance in the third quarter of the year.

In its financial statement, STMicroelectronics NV (NYSE:STM) said net income dropped by 32.3 percent to $237 million from $351 million in the same period last year.

Net revenues also dipped by 2 percent to $3.187 billion from $3.25 billion year-on-year, but was slightly above the mid-point of the company’s expectations.

Looking ahead, STMicroelectronics NV (NYSE:STM) President and CEO Jean-Marc Chery said the company is targeting to hit $11.75 billion in full-year 2025 revenues, with $3.28 billion in the fourth quarter alone.

“Our strategic priorities remain clear: accelerating innovation; executing our company-wide program to reshape our manufacturing footprint and resize our global cost base,” Chery said.

3. The Simply Good Foods Company (NASDAQ:SMPL)

Simply Good Foods fell to an all-time low on Thursday, as investor sentiment was dampened by its swing to a net loss in the fourth quarter of fiscal year 2025.

In intra-day trading, the stock dropped to its lowest price of $18.47 before trimming losses to end the day just down by 17.35 percent at $20.63 apiece.

In an updated report, The Simply Good Foods Company (NASDAQ:SMPL) said it fell to a net loss of $12.36 million from a $29.29 million net income in the same period last year.

Net sales dipped by 1.86 percent to $369 million from $376 million year-on-year, driven by a 6.9 percent headwind from lapping the extra week in the fourth quarter of fiscal year 2024.

For the full-year period, The Simply Good Foods Company (NASDAQ:SMPL) remained at a net income of $103.6 million, albeit lower by 25.6 percent than the $139.3 million in the full fiscal year of 2024. Net sales, on the other hand, grew by 11.5 percent to $1.45 billion from $1.33 billion year-on-year.

Looking ahead, The Simply Good Foods Company (NASDAQ:SMPL) said it expects net sales for the full fiscal year 2026 to either drop or rise by 2 percent year-on-year.

“Our outlook for fiscal year 2026 balances our long-term ambition, continued growth expectations for Quest and OWYN, and the benefits from productivity, pricing, and investments in our brands, against the two important challenges of reduced distribution for Atkins and cost pressures from inflation and tariffs,” said President and CEO Geoff Tanner.

“Even as we face these headwinds, we are taking the right actions for our portfolio, for the category, and for our company to enable sustainable growth and to create shareholder value for years to come,” he added.

2. Molina Healthcare, Inc. (NYSE:MOH)

Molina Healthcare extended losses to a third straight session on Thursday, to be just 30-cents shy of its 52-week low, as investor sentiment was dragged by a dismal earnings performance and a 31-percent lower net income forecast for the full-year 2025.

In an updated report, Molina Healthcare, Inc. (NYSE:MOH) said it now expects 2025 net profit to settle at $630 million, significantly lower than the $912 million projected previously on the back of higher medical cost trend in all segments alongside unprecedented medical cost trend which is expected to continue through the end of the year.

Adjusted net income was also lowered by 27.8 percent to $742 million from $1.028 billion as previously expected.

However, total revenues were expected to grow higher by $500 million to $44.5 billion versus the $44 billion as targeted prior.

In the third quarter of the year, Molina Healthcare, Inc. (NYSE:MOH) said net income fell by 76 percent to $79 million from $326 million year-on-year, while total revenues increased by 11 percent to $11.48 billion from $10.34 billion in the same comparable period.

“Our Medicaid business continues to perform well in a challenging medical cost trend environment,” said Molina Healthcare, Inc. (NYSE:MOH) President and CEO Joseph Zubretsky.

“The headline for the quarter is that approximately half of our underperformance is driven by the Marketplace business, and that Medicaid, while experiencing some pressure, is producing strong margins. We continue to grow, we believe the margin challenges will not persist, and we are encouraged by the margin improvement potential in 2026,” he noted.

1. Integer Holdings Corp. (NYSE:ITGR)

Integer fell to an all-time low on Thursday, as investors sold off positions after lowering its outlook for full-year 2025 amid headwinds that are expected to similarly impact operations and margins next year.

At intra-day trading, the stock dropped to its lowest 52-week price of $66.5 before paring losses to end the day just down by 32.28 percent at $73.89 apiece.

In an updated report, Integer Holdings Corp. (NYSE:ITGR) said it now expects full-year 2025 sales to grow between 7 and 8 percent, lower than the 8 to 9 percent targeted previously.

Operating income was also revised to $220 million to $226 million—a 6 to 9 percent growth year-on-year—but markedly lower than the $232 million to $244 million or 11 to 17 percent growth as previously projected.

Outlook for EBITDA, income from continuing operations, diluted EPS, and cash flow from operating activities were likewise slashed.

For 2026, Integer Holdings Corp. (NYSE:ITGR) expects sales to either drop or grow by 2 percent, while organic sales are targeted to remain unchanged or increase by 4 percent.

“While select headwinds are expected to impact our 2026 sales, we believe our strategy and strong product development pipeline will lead to a return to 200 basis points above-market organic growth in 2027,” said Integer Holdings Corp. (NYSE:ITGR) President and CEO Joseph Dziedzic.

In the third quarter alone, the company reported a 11.96 percent increase in net income at $39.68 million versus $35.44 million in the same period last year. Sales grew by 8.4 percent to $467.7 million from $431.4 million year-on-year.

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