Wednesday's midday trading session brought plenty of action, with FuelCell Energy, Inc. (FCEL) leading the headline losses after announcing plans to significantly expand its stock offering.

The clean energy company filed an amended sales agreement late Tuesday, revealing it would increase the amount of common stock available for sale to $200 million. Investors responded predictably to the prospect of dilution, sending shares down 8.9% to $7.23 by midday Wednesday.

Stock offerings aren't inherently bad news, of course. Companies need capital to grow, fund operations, or strengthen their balance sheets. But for existing shareholders, the math is straightforward: more shares outstanding means their slice of the pie gets smaller. And the market tends to price that in immediately.

But FuelCell wasn't alone in making significant moves Wednesday. Here's a rundown of the other stocks experiencing notable volatility in the midday session.

The Day's Big Winners

Intelligent Bio Solutions Inc. (INBS) absolutely exploded higher, jumping 107% to $8.51. The catalyst? The company announced a strategic manufacturing partnership with Syrma Johari MedTech to scale production of its Intelligent Fingerprinting Drug Screening Reader. That's the kind of partnership news that can double a stock in a single session, apparently.

ESH Acquisition Corp (ESHA) climbed 59% to $22.86, while Northann Corp. (NCL) surged 58.2% to $0.3071. No specific catalysts were immediately apparent for either move.

Aimei Health Technology Co., Ltd (AFJK) jumped 50.3% to $127.00, continuing the trend of substantial percentage gains in the midday session.

Anghami Inc. (ANGH) rose 44.6% to $3.60 after reporting year-over-year growth in its first-half results. Music streaming might be a competitive business, but investors liked what they saw in those numbers.

Vanda Pharmaceuticals Inc (VNDA) popped 33.1% to $9.36 on genuinely exciting news: FDA approval of NEREUS for preventing motion-induced vomiting. It's a specific indication, sure, but FDA approvals tend to be good for pharmaceutical stock prices, and this one was no exception.

Datavault AI Inc. (DVLT) gained 32% to $0.6802, joining the parade of strong midday performers.

Oriental Rise Holdings Limited (ORIS) jumped 31% to $1.6001 after announcing it signed a non-binding letter of intent to acquire Hubei Daguan Tea Industry Group. Non-binding letters are preliminary, of course, but they signal management's strategic direction.

Urgent.ly Inc (ULY) rose 31% to $3.60. Interestingly, the company announced Monday that it had adjourned its annual stockholder meeting without conducting any business due to insufficient votes to establish a quorum. Sometimes corporate governance complications create unusual trading patterns.

Momentus Inc (MNTS) gained 26.4% to $6.53, while LZ Technology Holdings Limited (LZMH) rose 19.4% to $1.66.

Rising Dragon Acquisition Corp. (RDAC) climbed 18.6% to $12.01, and Viewbix Inc (VBIX) jumped 16.6% to $1.5040.

Axsome Therapeutics, Inc. (AXSM) rose 16.1% to $172.90 after announcing it intends to file a new drug application in January for AXS-12 following positive FDA feedback. The company also disclosed that the FDA granted Priority Review to AXS-05 for Alzheimer's Agitation. That's two pieces of positive regulatory news in one announcement, which explains the solid gain.

KLX Energy Services Holdings, Inc (KLXE) gained 15.6% to $1.8150, Jyong Biotech Ltd. (MENS) added 11.8% to $4.7107, and SELLAS Life Sciences Group, Inc (SLS) climbed 7.5% to $3.5598, rounding out the gainers list.

The Day's Notable Decliners

If you're looking for the session's biggest loser, look no further than Corcept Therapeutics Incorporated (CORT), which plummeted 50.8% to $34.51. The company announced it received a Complete Response Letter from the FDA for Relacorilant, which is regulatory speak for "not approved in its current form." CRLs require companies to address specific deficiencies before resubmitting, and they're never good news for shareholders.

SMX (Security Matters) Public Limited Company (SMX) fell 39.2% to $31.30, experiencing the second-largest decline of the session.

Delixy Holdings Limited (DLXY) dropped 37.2% to $0.8853, while MultiSensor AI Holdings, Inc (MSAI) declined 30.7% to $0.2831.

Profusa, Inc (PFSA) fell 21.3% to $0.0958, even as the company announced a new distributor partnership in France with MedSell. Sometimes positive business developments can't overcome broader concerns about a company's prospects.

Volato Group, Inc (SOAR) dropped 21.1% to $0.6231, and Rain Enhancement Technologies Holdco, Inc. (RAIN) declined 20.6% to $6.45.

BNB Plus Corp. (BNBX) fell 18.8% to $1.25, while Antelope Enterprise Holdings Limited (AEHL) dipped 18.5% to $1.7750.

WORK Medical Technology Group LTD (WOK) declined 17.3% to $2.4310, and Fitell Corporation (FTEL) fell 16.9% to $0.5669.

Zhongchao Inc (ZCMD) dropped 16.5% to $0.5118, continuing the downward pressure on several small-cap names.

NIO Inc. (NIO) fell 9.2% to $4.9950, representing one of the larger-cap names on the losers list.

Wheels Up Experience Inc (UP) rounded out the decliners, falling 6.3% to $0.5844.

Wednesday's midday session demonstrated once again that individual stock volatility remains alive and well, with company-specific news driving dramatic moves in both directions. From FDA decisions to manufacturing partnerships to stock offerings, the catalysts varied widely, but the market's reactions were swift and decisive.