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How a Rival's Clinical Setback Sent BBIO Stock to a 52-Week High
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Key Takeaways
BridgeBio Pharma surged after a rival's phase III ATTR-CM trial failed its primary endpoint.
BBIO's Attruby is its only marketed drug and posted strong U.S. sales after its FDA approval.
BridgeBio sees a large ATTR-CM opportunity as diagnoses rise and the market remains underdiagnosed.
Shares of BridgeBio Pharma (BBIO - Free Report) climbed to a 52-week high of $93.42 on Thursday after rival AstraZeneca's (AZN - Free Report) late-stage clinical setback boosted investor confidence in the company's sole marketed drug, Attruby. Although the stock did not hold on to its intraday high, it still ended the session 15% higher, adding roughly $2.3 billion to its market value.
The rally followed AstraZeneca’s announcement that the phase III CARDIO-TTRansform study evaluating Wainua in patients with transthyretin amyloid cardiomyopathy (ATTR-CM) failed to meet its primary endpoint. Investors viewed the setback as a favorable development for BridgeBio's Attruby because it could strengthen the drug’s competitive position in the ATTR-CM space.
Attruby is currently BridgeBio's only marketed product and the primary driver of the company's revenues. Approved by the FDA in November 2024 for adults with ATTR-CM, the drug has enjoyed a strong commercial launch. BridgeBio generated $362.4 million in U.S. Attruby sales in 2025, its first full year on the market, followed by nearly $181 million in the first quarter of 2026 alone.
Attruby's long-term opportunity remains substantial because the target market continues to be significantly underdiagnosed. BridgeBio estimates that the number of diagnosed ATTR-CM patients in the United States grew from fewer than 5,000 in 2019 to more than 50,000 in 2025, while the global market opportunity for ATTR therapies could ultimately exceed $20 billion.
Another company that benefited from AstraZeneca’s clinical setback is Pfizer (PFE - Free Report) , whose shares also rose 1% yesterday. The U.S.-based pharma giant currently dominates the ATTR-CM market with its Vyndaqel family, comprising Vyndaqel, Vyndamax and Vynmac. The franchise generated approximately $1.6 billion in global sales in first-quarter 2026, up 8% year over year, underscoring its leadership in the space. In April, Pfizer entered into a settlement with generic drug manufacturers that extends the effective U.S. patent protection for Vyndamax until June 1, 2031, delaying generic competition and supporting the drug's long-term commercial outlook.
BBIO’s Price Performance, Valuation & Estimates
Shares of BridgeBio have risen 18% year to date, outperforming the industry’s 3% growth.
Image Source: Zacks Investment Research
From a valuation standpoint, the company is currently trading at a premium to the industry. Based on the price-to-sales (P/S) ratio, the stock trades at 13.46 times forward 12-month sales, higher than the industry average of 1.95 times.
Image Source: Zacks Investment Research
Estimates for BridgeBio’s 2026 and 2027 bottom line have declined over the past 30 days.
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How a Rival's Clinical Setback Sent BBIO Stock to a 52-Week High
Key Takeaways
Shares of BridgeBio Pharma (BBIO - Free Report) climbed to a 52-week high of $93.42 on Thursday after rival AstraZeneca's (AZN - Free Report) late-stage clinical setback boosted investor confidence in the company's sole marketed drug, Attruby. Although the stock did not hold on to its intraday high, it still ended the session 15% higher, adding roughly $2.3 billion to its market value.
The rally followed AstraZeneca’s announcement that the phase III CARDIO-TTRansform study evaluating Wainua in patients with transthyretin amyloid cardiomyopathy (ATTR-CM) failed to meet its primary endpoint. Investors viewed the setback as a favorable development for BridgeBio's Attruby because it could strengthen the drug’s competitive position in the ATTR-CM space.
Attruby is currently BridgeBio's only marketed product and the primary driver of the company's revenues. Approved by the FDA in November 2024 for adults with ATTR-CM, the drug has enjoyed a strong commercial launch. BridgeBio generated $362.4 million in U.S. Attruby sales in 2025, its first full year on the market, followed by nearly $181 million in the first quarter of 2026 alone.
Attruby's long-term opportunity remains substantial because the target market continues to be significantly underdiagnosed. BridgeBio estimates that the number of diagnosed ATTR-CM patients in the United States grew from fewer than 5,000 in 2019 to more than 50,000 in 2025, while the global market opportunity for ATTR therapies could ultimately exceed $20 billion.
Another company that benefited from AstraZeneca’s clinical setback is Pfizer (PFE - Free Report) , whose shares also rose 1% yesterday. The U.S.-based pharma giant currently dominates the ATTR-CM market with its Vyndaqel family, comprising Vyndaqel, Vyndamax and Vynmac. The franchise generated approximately $1.6 billion in global sales in first-quarter 2026, up 8% year over year, underscoring its leadership in the space. In April, Pfizer entered into a settlement with generic drug manufacturers that extends the effective U.S. patent protection for Vyndamax until June 1, 2031, delaying generic competition and supporting the drug's long-term commercial outlook.
BBIO’s Price Performance, Valuation & Estimates
Shares of BridgeBio have risen 18% year to date, outperforming the industry’s 3% growth.
Image Source: Zacks Investment Research
From a valuation standpoint, the company is currently trading at a premium to the industry. Based on the price-to-sales (P/S) ratio, the stock trades at 13.46 times forward 12-month sales, higher than the industry average of 1.95 times.
Image Source: Zacks Investment Research
Estimates for BridgeBio’s 2026 and 2027 bottom line have declined over the past 30 days.
Image Source: Zacks Investment Research
BBIO currently carries a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.