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BIIB
NASDAQ Life Sciences

Biogen, Denali Parkinson's Drug Fails Phase 2b Trial, Development Halted

Tom Rudovsky · Reported by Dow Jones Newswires
More coverage: Pharmaceutical Stocks · Healthcare
Sentiment info
Negative
Importance info
9
Price
$187.5
Mkt Cap
$27.973B
52W Low
$121.05
52W High
$205.97
52W Position info
55% above low
Off High info
9.0% below high
Rel. Volume info
1.3× avg
Market data snapshot near publication time

BIIB sits 55% above its 52-week low of $121.05.

Summary

Biogen and Denali Therapeutics announced their Parkinson's drug, BIIB122, failed to meet its primary and secondary endpoints in a Phase 2b trial. As a result, development of BIIB122 for idiopathic Parkinson's disease is being discontinued. This represents a significant setback for both companies' neurology pipelines, following a period of positive news for Biogen including strong Q1 results and several successful drug developments and acquisitions. While Denali will continue a Phase 2a study for a specific LRRK2 variant, the broader and more lucrative idiopathic Parkinson's indication is now off the table.

At the time of this announcement, BIIB was trading at $187.50 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $28B. The 52-week trading range was $121.05 to $205.97. This news item was assessed with negative market sentiment and an importance score of 9 out of 10. Source: Dow Jones Newswires.


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BIIB
Jul 29, 2026, 10:51 AM EDT
Source: Reuters
Importance Score:
8
Price at Filing: $214.75
Real-time Price: $206.38 info
Change: -$8.37 (-4%) info
Market Cap: $30.493B info
BIIB
Jul 29, 2026, 6:36 AM EDT
Filing Type: 10-Q
Importance Score:
9
Price at Filing: $204.29
Real-time Price: $206.38 info
Change: +$2.09 (+1%) info
Market Cap: $30.493B info
BIIB
Jul 29, 2026, 6:10 AM EDT
Filing Type: 8-K
Importance Score:
9
Price at Filing: $201.00
Real-time Price: $206.38 info
Change: +$5.38 (+3%) info
Market Cap: $30.493B info
BIIB
Jul 29, 2026, 6:00 AM EDT
Source: Reuters
Importance Score:
9
Price at Filing: $201.00
Real-time Price: $206.38 info
Change: +$5.38 (+3%) info
Market Cap: $30.493B info
BIIB
Jul 14, 2026, 11:18 AM EDT
Source: GlobeNewswire
Importance Score:
8
Price at Filing: $190.77
Real-time Price: $206.38 info
Change: +$15.60 (+8%) info
Market Cap: $30.493B info