The S&P/ASX 200 Index (ASX: XJO) is having a relatively positive session on Wednesday. In afternoon trade, the benchmark index is up 0.1% to 8,982 points.
Four ASX shares that have failed to follow the market higher today are listed below. Here's why they are falling:

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Boss Energy Ltd (ASX: BOE)
The Boss Energy share price is down 11% to $1.54. Investors have been selling the uranium producer's shares after it downgraded its guidance. Boss Energy now expects FY 2026 production for the Honeymoon operation to be between 1.40 million and 1.45 million pounds of U3O8. This is down from previous guidance of 1.6 million pounds. The company's managing director, Matthew Dusci, said: "We recognise this downgrade is disappointing, particularly after maintaining guidance as recently as March. At that time, our expectation was that site access and reagent deliveries would normalise during the month. Subsequent unexpected rainfall, combined with the degraded baseline condition of access roads, extended disruption materially beyond that assumption. This has impacted both production and the timing of commissioning critical infrastructure during ramp-up."
Telix Pharmaceuticals Ltd (ASX: TLX)
The Telix Pharmaceuticals share price is down 6% to $14.50. This has been driven by news that the radiopharmaceuticals company is raising US$600 million through a convertible bonds offering. The bonds are expected to carry a relatively low coupon of between 1.50% and 1.75% and will be issued with a conversion price of US$13.85 (~A$19.55). This is a premium of approximately 37.5% to the current share price. Telix's managing director and group CEO, Dr. Christian Behrenbruch, said: "The successful completion of the convertible bonds refinance is in line with our capital management strategy and provides financial flexibility for Telix. We are pleased with the support we have received from both existing and new investors as part of the concurrent repurchase and new issue of convertible bonds."
Woodside Energy Group Ltd (ASX: WDS)
The Woodside Energy share price is down 2.5% to $33.13. Investors have been selling the energy producer's shares today in response to reports that the US and Iran have re-entered peace talks. This caused oil prices to tumble overnight. It isn't just Woodside shares that are falling. The S&P/ASX 200 Energy index is down 2% at the time of writing.
Yancoal Australia Ltd (ASX: YAL)
The Yancoal Australia share price is down 2.5% to $7.06. This is despite the coal miner announcing a major acquisition today. Yancoal revealed that it has agreed to acquire an 80% interest in the Kestrel coal mine in Queensland's Bowen Basin for up to US$2.4 billion. This includes an upfront payment of US$1.85 billion, as well as contingent payments of up to US$550 million that are linked to future coal prices.