US market news

Biotech’s breakout: How US healthcare stocks staged an autumn comeback

Denila Lobo
September 10, 2025
2 minutes read
Biotech’s breakout: How US healthcare stocks staged an autumn comeback

September’s typically a tough month for the US stock market. Yet, tucked away from headline talk of record highs and Federal Reserve bets, a surprise story has been brewing in the healthcare sector. After months languishing behind tech and energy, biotech stocks are rebounding and drawing big-ticket investors, with compelling insider moves and landmark deals setting the tone for what might be the most interesting pivot in US markets this season.

The rally began quietly enough. August ended with healthcare returning 5.4%, its best month since January. This marks a dramatic turnaround, especially after a rough stretch between April and July. Portfolio managers spotted a rare phenomenon: “It’s the widest discount to the S&P 500 biotech has seen in three decades,” said Robert Moffat of Middlefield Funds. “Investors are circling back, and we see ample room for further outperformance as autumn sets in”.

Line graph illustrating monthly percentage returns for US healthcare sector in 2025.

Big investors, bigger bets

Money talks. Berkshire Hathaway’s recent $1.6 billion stake in UnitedHealth sent shockwaves down Wall Street, confirming that value is returning to healthcare. Hedge fund icons Michael Burry and David Tepper joined the fray, pouring new capital into market leaders and compelling smaller biotechs. Many insiders, including Eli Lilly’s CEO and several board members, have bought shares just as the company widens its research pipeline and prepares for landmark patent expirations.

“Insider buying on this scale is rare, especially across top executives,” commented Jane Fraser, head of US equity research at a major asset manager. “It signals authentic confidence in future prospects rather than hype.” As pharma giants approach looming patent cliffs, market-watchers expect even more acquisition activity. “Business development and M&A will drive the sector. Biotech companies are uniquely positioned to benefit from this wave. What looks risky at a glance might be the safest bet of the autumn,” Fraser explained.

Innovation and M&A: Biotech’s lifeline

Patent expirations don’t just threaten Big Pharma’s revenue, they’re pushing leaders into frantic innovation mode. This year, US biopharma saw $1.1 trillion in dealmaking since June, with nearly $300 billion in August alone. That’s the busiest summer since 2021 for healthcare M&A, sparked by a need to fill revenue gaps with fresh intellectual property.

Bar chart showing US biopharma M&A deals in trillions from June to August 2025.

Not all deals are straightforward; instead of splashy acquisitions, companies favour flexible licensing and partnership agreements. These let buyers pay up only if trial results show promise, making smaller biotech firms ripe targets for long-term growth. “Large-cap acquirers are shopping for innovation,” noted Moffat, “while SMID-cap biotechs reap the rewards. Our funds have initiated new positions and remain overweight the industry.”

The comeback tells a broader story. Investors are recalibrating their portfolios as autumn’s volatility returns, mindful that resilient sectors like healthcare might provide the balance needed against macro risks. Says strategist Linda Duong: “We’re seeing healthcare investors getting very tactical. In periods of uncertainty, quality and innovation matter more than ever. It’s why biotech’s rebound stands out, not just as a seasonal quirk, but as a structural opportunity”.

As Wall Street’s spotlight finds new angles, biotech’s movement hints at a market full of surprises, for those ready to look beyond the obvious.

Disclaimer: The views and recommendations made above are those of individual analysts or brokerage companies, and not of Winvesta. We advise investors to check with certified experts before making any investment decisions.

Disclaimer: The views and recommendations made above are those of individual analysts or brokerage companies, and not of Winvesta. We advise investors to check with certified experts before making any investment decisions.

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