Biogen (BIIB)

Typically moves ±3.25% on earnings

EARNINGS ANALYTICS

event_note Approx. Next Earnings: ~2026-10-28 APPROXIMATE

Since Oct 27, 2004, Biogen (BIIB) has reported earnings 87 times. On average the shares move ±3.25% post-earnings, with a positive reaction 57.5% of the time. Its largest post-earnings gain was +15.17% (Apr 21, 2011) and its largest decline was -22.08% (Jul 24, 2015). The next earnings report is predicted for 2026-10-28 (approximate).

Earnings reactions

How BIIB moved on each past earnings report.

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Earnings Impact

Total Earnings

Avg Abs. Movement

±3.25%

Positive %

57.5%

Negative %

42.5%

Historical Earnings Statistics

Date	Timing	Earnings move	SEC Filing
Jul 01, 2026	☽ POST	+3%	open_in_new
Apr 29, 2026	☀ PRE	+6%	open_in_new
Feb 06, 2026	☀ PRE	+8.53%	open_in_new
Oct 30, 2025	☀ PRE	+1.18%	open_in_new
Jul 31, 2025	☀ PRE	+1.07%	open_in_new
May 01, 2025	☀ PRE	-0.12%	open_in_new
Feb 12, 2025	☀ PRE	-4.28%	open_in_new
Oct 30, 2024	☀ PRE	-1.25%	open_in_new
Aug 01, 2024	☀ PRE	-1.17%	open_in_new
Apr 24, 2024	☀ PRE	+4.56%	open_in_new
Feb 13, 2024	☀ PRE	-7.39%	open_in_new
Nov 08, 2023	☀ PRE	-5.67%	open_in_new
Jul 25, 2023	☀ PRE	-2.42%	open_in_new
Apr 25, 2023	☀ PRE	-3.62%	open_in_new
Feb 15, 2023	☀ PRE	-3.49%	open_in_new
Oct 25, 2022	☀ PRE	-0.39%	open_in_new
Jul 20, 2022	☀ PRE	-5.8%	open_in_new
May 03, 2022	☀ PRE	-0.78%	open_in_new
Feb 03, 2022	☀ PRE	-2.13%	open_in_new
Oct 20, 2021	☀ PRE	-0.58%	open_in_new
Jul 22, 2021	☀ PRE	+1.05%	open_in_new
Apr 22, 2021	☀ PRE	-4.02%	open_in_new
Feb 03, 2021	☀ PRE	-5.21%	open_in_new
Oct 21, 2020	☀ PRE	+0.67%	open_in_new
Jul 22, 2020	☀ PRE	+0.22%	open_in_new
Apr 22, 2020	☀ PRE	-9.42%	open_in_new
Jan 30, 2020	☀ PRE	-1.77%	open_in_new
Jul 23, 2019	☀ PRE	+4.9%	open_in_new
Apr 24, 2019	☀ PRE	-2.52%	open_in_new
Jan 29, 2019	☀ PRE	+1.35%	open_in_new
Oct 23, 2018	☀ PRE	+0.19%	open_in_new
Jul 24, 2018	☀ PRE	+4.11%	open_in_new
Apr 24, 2018	☀ PRE	+1.1%	open_in_new
Jan 25, 2018	☀ PRE	+2.09%	open_in_new
Oct 24, 2017	☀ PRE	-3.9%	open_in_new
Jul 25, 2017	☀ PRE	-0.61%	open_in_new
Apr 25, 2017	☀ PRE	+3.62%	open_in_new
Jan 26, 2017	☀ PRE	+2.07%	open_in_new
Oct 26, 2016	☀ PRE	+3.66%	open_in_new
Jul 21, 2016	☀ PRE	+7.64%	open_in_new
Apr 21, 2016	☀ PRE	+5.16%	open_in_new
Jan 27, 2016	☀ PRE	+5.15%	open_in_new
Oct 21, 2015	☀ PRE	+3.96%	open_in_new
Jul 24, 2015	☀ PRE	-22.08%	open_in_new
Apr 24, 2015	☀ PRE	-6.64%	open_in_new
Jan 29, 2015	☽ POST	+10.17%	open_in_new
Oct 22, 2014	☀ PRE	-5.42%	open_in_new
Jul 23, 2014	☀ PRE	+11.17%	open_in_new
Apr 23, 2014	☀ PRE	+0.18%	open_in_new
Jan 29, 2014	☀ PRE	-0.06%	open_in_new
Oct 28, 2013	☀ PRE	+0.86%	open_in_new
Jul 25, 2013	☀ PRE	+0.38%	open_in_new
Apr 25, 2013	☀ PRE	+4.76%	open_in_new
Jan 28, 2013	☀ PRE	+2.59%	open_in_new
Oct 25, 2012	☀ PRE	+1.67%	open_in_new
Jul 24, 2012	☀ PRE	+0.18%	open_in_new
May 01, 2012	☀ PRE	-1.63%	open_in_new
Jan 31, 2012	☀ PRE	+1.18%	open_in_new
Oct 28, 2011	☀ PRE	+0.83%	open_in_new
Jul 26, 2011	☀ PRE	+0.97%	open_in_new
Apr 21, 2011	☀ PRE	+15.17%	open_in_new
Feb 01, 2011	☀ PRE	+0.03%	open_in_new
Oct 26, 2010	☀ PRE	+0.15%	open_in_new
Jul 20, 2010	☀ PRE	+1.58%	open_in_new
Apr 20, 2010	☀ PRE	-1.61%	open_in_new
Feb 09, 2010	☀ PRE	+2.37%	open_in_new
Oct 20, 2009	☀ PRE	-2.69%	open_in_new
Jul 16, 2009	☀ PRE	+0.92%	open_in_new
Apr 16, 2009	☽ POST	-2.72%	open_in_new
Feb 06, 2009	☀ PRE	-1.5%	open_in_new
Oct 21, 2008	☀ PRE	-7.37%	open_in_new
Jul 22, 2008	☀ PRE	+6.63%	open_in_new
Apr 23, 2008	☀ PRE	-0.17%	open_in_new
Feb 06, 2008	☀ PRE	+0%	open_in_new
Oct 23, 2007	☀ PRE	-1.47%	open_in_new
Jul 24, 2007	☀ PRE	+2.72%	open_in_new
May 02, 2007	☀ PRE	+0.04%	open_in_new
Feb 15, 2007	☀ PRE	-4.93%	open_in_new
Oct 31, 2006	☀ PRE	+8.4%	open_in_new
Jul 26, 2006	☀ PRE	-1.4%	open_in_new
Apr 26, 2006	☀ PRE	-0.02%	open_in_new
Feb 15, 2006	☽ POST	+3.52%	open_in_new
Oct 26, 2005	☽ POST	-4.15%	open_in_new
Jul 26, 2005	☽ POST	+1.7%	open_in_new
Apr 27, 2005	☽ POST	+0.39%	open_in_new
Mar 17, 2005	☽ POST	+0.26%	open_in_new
Oct 27, 2004	☽ POST	+1.86%	open_in_new

event

Earnings Count

Total earnings in dataset

trending_up

Avg Abs. Movement

±3.25%

Avg % price change on earnings

description

SEC Filings

View

Browse all SEC filings

account_balance

Institutional ownership

Holdings as of Jun 30, 2026 · SEC 13-F

View all 42 →

Funds holding

$6053179024

Total value held

Buying

36 added · 4 reduced

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$397998875 -6.63%

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$265201330 +0.03%

Goldman Sachs Group Inc

$215869950 +1.73%

SEC Filing Types

Recent SEC Filings

10 most recent

Form	Date Filed	View on EDGAR
8-K	20260701	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov
4	20260611	open_in_new SEC.gov

Frequently asked about BIIB earnings

When does Biogen report earnings next? expand_more

Biogen (BIIB)'s next earnings date is approximate for 2026-10-28. This is a prediction based on its historical quarterly reporting pattern, not a company-confirmed date.

How much does BIIB stock move after earnings? expand_more

Over 87 reports, BIIB has moved an average of ±3.25% the session after earnings, closing higher 57.5% of the time.

What was BIIB's biggest post-earnings move? expand_more

BIIB's largest post-earnings gain on record was +15.17% on Apr 21, 2011, and its largest decline was -22.08% on Jul 24, 2015.

Where can I find Biogen's SEC filings? expand_more

All of Biogen's SEC filings — 10-K, 10-Q, 8-K and more — are listed in the SEC filings section on this page, each linking to the original document on SEC.gov.