Company Performance: ALK-Abelló's financial health, including revenue, profitability, and market share in allergy immunotherapy, significantly influences its stock price.

Clinical Trial Results: Positive or negative outcomes from clinical trials for new allergy treatments or improvements to existing ones can dramatically impact investor sentiment.

Regulatory Approvals: Approval of ALK-Abelló's products by regulatory bodies like the FDA or EMA is crucial for market access and sales growth, thereby affecting the stock price.

Market Competition: The competitive landscape in the allergy treatment market, including the presence of other major players and the emergence of new therapies, can influence ALK-Abelló's market position and stock value.

Overall Market Conditions: General economic trends, investor confidence, and market sentiment towards the pharmaceutical or healthcare sectors can affect ALK-Abelló's stock price, regardless of company-specific factors.

Global Health Events: Events like pandemics or widespread allergy seasons can affect demand for allergy treatments and related products, indirectly impacting ALK-Abelló's performance and stock price.