What is the current annual gross margin of BIIB?

As of today, BIIB annual gross margin is 75.69%

What is 1-year change in BIIB annual gross margin?

BIIB annual gross margin is up +11.64% year-over-year

What is 3-year change in BIIB annual gross margin?

BIIB annual gross margin is up +7.59% over the past 3 years

How far is BIIB annual gross margin from its all-time high?

BIIB annual gross margin is currently -22.07% below its historical high of 97.13% set on December 31, 2002

How does BIIB annual gross margin rank versus sector peers?

BIIB annual gross margin is higher than 73.48% of companies in Healthcare sector

When is BIIB next annual earnings release?

The next annual earnings release for BIIB is on February 5, 2027

What is the current quarterly gross margin of BIIB?

As of today, BIIB quarterly gross margin is 63.23%

What is BIIB quarterly gross margin most recent change?

BIIB quarterly gross margin was up +3.03% on September 30, 2026

What is 1-year change in BIIB quarterly gross margin?

BIIB quarterly gross margin is down -1.65% year-over-year

How far is BIIB quarterly gross margin from its all-time high?

BIIB quarterly gross margin is currently -65.72% below its historical high of 184.47% set on December 31, 1992

How does BIIB quarterly gross margin rank versus sector peers?

BIIB quarterly gross margin is higher than 59.58% of companies in Healthcare sector

When is BIIB next earnings release?

The next earnings release for BIIB is on February 5, 2027

Biogen Inc. (BIIB) Gross Margin History & Chart Since 1984

Annual Gross Margin

75.69%7.89%+11.64%

December 31, 2025

Summary

Current Value: As of today, BIIB annual gross margin is 75.69%, up +11.64% on December 31, 2025
Historical Performance: BIIB annual gross margin is up +7.59% over the past 3 years, down -7.34% over the past 5 years
All-Time High Comparison: BIIB annual gross margin is currently -22.07% below its historical high of 97.13% set on December 31, 2002
3-Year Low Comparison: BIIB annual gross margin is +11.64% above its 3-year low of 67.80% reached on December 31, 2024
Sector Comparison: BIIB annual gross margin is higher than 73.48% of companies in Healthcare sector

Gross Margin Chart

beforeafter

Performance

BIIB Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Gross Margin	Dec 31, 25	75.69%	+11.6%	+7.6%	-7.3%	-10.0%
Quarterly Gross Margin	Sep 30, 26	63.23%	-1.6%	-6.7%	-16.4%	-24.8%
Price	Nov 6, 26	$248.35	+58.5%	-0.1%	-10.9%	+118.8%
PE Ratio	Nov 6, 26	106.31	+644.0%	+330.1%	+289.8%	+349.7%
Annual Revenue	Dec 31, 25	$9.53B	+2.9%	+1.1%	-22.9%	+149.4%
Annual Gross Profit	Dec 31, 25	$7.49B	+19.1%	+12.8%	-25.8%	+133.0%
Annual Operating Margin	Dec 31, 25	27.90%	+21.7%	+15.7%	-9.3%	+57.9%
Annual Net Margin	Dec 31, 25	13.07%	-25.8%	-58.4%	-60.2%	-44.3%

Gross Margin Highs

BIIB Annual Gross Margin Highs Comparison
Period	High	Date	Current
3Y	75.69%	Dec 31, 25	at high
5Y	81.69%	N/A	-7.3%
All	97.13%	Dec 31, 02	-22.1%

Gross Margin Lows

BIIB Annual Gross Margin Lows Comparison
Period	Low	Date	Current
3Y	67.80%	Dec 31, 24	+11.6%
5Y	67.80%	Dec 31, 24	+11.6%
All	-264.06%	Dec 31, 86	+128.7%

Gross Margin History

Year	Value	Change
2025	75.69%	+11.6%
2024	67.80%	-0.1%
2023	67.84%	-3.6%
2022	70.35%	-6.2%
2021	75.03%	-8.2%
2020	81.69%	+0.9%
2019	80.97%	-1.0%
2018	81.77%	+0.9%
2017	81.03%	-1.5%
2016	82.28%	-0.4%
2015	82.59%	+1.7%
2014	81.24%	+2.2%
2013	79.51%	-4.4%
2012	83.20%	-0.9%
2011	83.97%	-0.1%
2010	84.06%	+3.0%
2009	81.61%	+4.3%
2008	78.21%	+1.7%
2007	76.92%	+3.0%
2006	74.68%	+1.5%
2005	73.60%	+20.0%

Year	Value	Change
2004	61.33%	-22.2%
2003	78.80%	-18.9%
2002	97.13%	>+9,900.0%
2001	0.00%	-100.0%
2000	95.27%	+9.5%
1999	86.99%	+15.2%
1998	75.50%	+67.7%
1997	45.02%	-48.0%
1996	86.58%	+1,681.5%
1995	4.86%	+102.6%
1994	-184.71%	-290.8%
1993	-47.26%	+73.5%
1992	-178.57%	-137.1%
1991	-75.33%	-356.7%
1990	29.34%	+153.4%
1989	11.58%	+576.5%
1988	-2.43%	+98.3%
1987	-144.19%	+45.4%
1986	-264.06%	-476.2%
1985	70.20%	+303.5%
1984	-34.50%	-

FAQ

What is the current annual gross margin of BIIB?: As of today, BIIB annual gross margin is 75.69%
What is 1-year change in BIIB annual gross margin?: BIIB annual gross margin is up +11.64% year-over-year
What is 3-year change in BIIB annual gross margin?: BIIB annual gross margin is up +7.59% over the past 3 years
How far is BIIB annual gross margin from its all-time high?: BIIB annual gross margin is currently -22.07% below its historical high of 97.13% set on December 31, 2002
How does BIIB annual gross margin rank versus sector peers?: BIIB annual gross margin is higher than 73.48% of companies in Healthcare sector
When is BIIB next annual earnings release?: The next annual earnings release for BIIB is on February 5, 2027

Gross Margin Formula

Gross Margin = Gross Profit

Revenue × 100%

Quarterly Gross Margin

63.23%1.86%+3.03%

September 30, 2026

Summary

Current Value: As of today, BIIB quarterly gross margin is 63.23%, up +3.03% on September 30, 2026
Historical Performance: BIIB quarterly gross margin is down -1.65% year-over-year, down -6.71% over the past 3 years
All-Time High Comparison: BIIB quarterly gross margin is currently -65.72% below its historical high of 184.47% set on December 31, 1992
3-Year Low Comparison: BIIB quarterly gross margin is +3.03% above its 3-year low of 61.37% reached on June 30, 2026
Sector Comparison: BIIB quarterly gross margin is higher than 59.58% of companies in Healthcare sector

Performance

BIIB Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Gross Margin	Sep 30, 26	63.23%	+3.0%	-1.6%	-6.7%	-16.4%
Annual Gross Margin	Dec 31, 25	75.69%	–	+11.6%	+7.6%	-7.3%
Price	Nov 6, 26	$248.35	+20.4%	+58.5%	-0.1%	-10.9%
PE Ratio	Nov 6, 26	106.31	+191.0%	+644.0%	+330.1%	+289.8%
Quarterly Revenue	Sep 30, 26	$2.69B	+2.6%	+9.6%	+10.5%	+1.6%
Quarterly Gross Profit	Sep 30, 26	$1.70B	+5.7%	+7.8%	+3.1%	-15.1%
Quarterly Operating Margin	Sep 30, 26	16.50%	-1.3%	-34.0%	+111.3%	-38.7%
Quarterly Net Margin	Sep 30, 26	-0.77%	-120.7%	-104.0%	+72.5%	-106.4%

Quarterly Gross Margin Highs

BIIB Quarterly Gross Margin Highs Comparison
Period	High	Date	Current
1Y	68.12%	Dec 31, 25	-7.2%
3Y	70.05%	Jun 30, 24	-9.7%
5Y	75.67%	N/A	-16.4%
All	184.47%	Dec 31, 92	-65.7%

Quarterly Gross Margin Lows

BIIB Quarterly Gross Margin Lows Comparison
Period	Low	Date	Current
1Y	61.37%	Jun 30, 26	+3.0%
3Y	61.37%	Jun 30, 26	+3.0%
5Y	61.37%	Jun 30, 26	+3.0%
All	0.00%	Mar 31, 98	N/A

Quarterly Gross Margin History

Month	Value	Change
Sep 2026	63.23%	+3.0%
Jun 2026	61.37%	-4.1%
Mar 2026	63.99%	-6.1%
Dec 2025	68.12%	+6.0%
Sep 2025	64.29%	-6.6%
Jun 2025	68.80%	+5.5%
Mar 2025	65.22%	-0.4%
Dec 2024	65.46%	+0.1%
Sep 2024	65.42%	-6.6%
Jun 2024	70.05%	+2.0%
Mar 2024	68.65%	+2.4%
Dec 2023	67.02%	-1.1%
Sep 2023	67.78%	-2.9%
Jun 2023	69.80%	+4.6%
Mar 2023	66.75%	-1.1%
Dec 2022	67.49%	-9.1%
Sep 2022	74.26%	-0.0%
Jun 2022	74.28%	+19.4%
Mar 2022	62.21%	-10.5%
Dec 2021	69.49%	-8.2%
Sep 2021	75.67%	-5.1%
Jun 2021	79.73%	+6.4%
Mar 2021	74.94%	+110.9%
Dec 2020	35.53%	-56.6%
Sep 2020	81.92%	-3.2%
Jun 2020	84.60%	+2.9%
Mar 2020	82.22%	-0.7%
Dec 2019	82.80%	-1.8%
Sep 2019	84.29%	+1.6%
Jun 2019	82.96%	+6.0%
Mar 2019	78.24%	-4.6%
Dec 2018	82.03%	-0.1%
Sep 2018	82.09%	-0.4%
Jun 2018	82.39%	+2.4%
Mar 2018	80.47%	+1.3%
Dec 2017	79.43%	-4.0%
Sep 2017	82.72%	+0.5%
Jun 2017	82.27%	+23.9%
Mar 2017	66.41%	-20.5%
Dec 2016	83.58%	+3.7%
Sep 2016	80.58%	-1.7%
Jun 2016	81.94%	-1.6%
Mar 2016	83.30%	-1.6%
Dec 2015	84.62%	+1.8%
Sep 2015	83.10%	+0.1%
Jun 2015	83.03%	+1.8%
Mar 2015	81.53%	-3.6%
Dec 2014	84.60%	+3.5%
Sep 2014	81.73%	+1.0%
Jun 2014	80.92%	+2.2%
Mar 2014	79.16%	+0.7%
Dec 2013	78.61%	+0.2%
Sep 2013	78.45%	-0.0%
Jun 2013	78.47%	-6.2%
Mar 2013	83.66%	-0.4%
Dec 2012	84.03%	+1.5%
Sep 2012	82.75%	-0.7%
Jun 2012	83.33%	+0.9%
Mar 2012	82.59%	-0.1%
Dec 2011	82.66%	-1.7%
Sep 2011	84.09%	+0.3%
Jun 2011	83.88%	+0.3%
Mar 2011	83.64%	-3.9%
Dec 2010	87.04%	+4.4%
Sep 2010	83.34%	-0.7%
Mar 2010	83.93%	+0.3%
Dec 2009	83.71%	-0.9%
Sep 2009	84.49%	+6.1%
Jun 2009	79.65%	+1.8%
Mar 2009	78.21%	+0.9%
Dec 2008	77.48%	+3.8%
Sep 2008	74.64%	-6.7%
Jun 2008	79.99%	+2.8%
Mar 2008	77.81%	-0.7%

Month	Value	Change
Dec 2007	78.32%	+1.9%
Sep 2007	76.87%	+0.3%
Jun 2007	76.64%	+1.5%
Mar 2007	75.51%	-3.6%
Dec 2006	78.29%	+0.8%
Sep 2006	77.68%	+10.5%
Jun 2006	70.33%	-1.9%
Mar 2006	71.68%	+13.8%
Dec 2005	62.98%	-2.5%
Sep 2005	64.57%	-14.5%
Jun 2005	75.53%	+7.6%
Mar 2005	70.18%	-18.2%
Dec 2004	85.82%	+22.4%
Sep 2004	70.12%	-29.9%
Jun 2004	100.00%	+162.8%
Mar 2004	38.05%	-53.3%
Dec 2003	81.45%	-15.8%
Sep 2003	96.75%	-0.3%
Jun 2003	97.01%	+0.4%
Mar 2003	96.63%	-0.8%
Dec 2002	97.41%	+0.3%
Sep 2002	97.13%	+1.0%
Jun 2002	96.21%	-1.3%
Mar 2002	97.51%	>+9,900.0%
Dec 2001	0.00%	-100.0%
Sep 2001	100.00%	0.0%
Jun 2001	100.00%	>+9,900.0%
Mar 2001	0.00%	-100.0%
Dec 2000	100.00%	>+9,900.0%
Sep 2000	0.00%	0.0%
Jun 2000	0.00%	-100.0%
Mar 2000	90.71%	-8.4%
Dec 1999	99.01%	+17.7%
Sep 1999	84.14%	-13.7%
Jun 1999	97.51%	-0.6%
Mar 1999	98.05%	>+9,900.0%
Dec 1998	0.00%	0.0%
Sep 1998	0.00%	0.0%
Jun 1998	0.00%	0.0%
Mar 1998	0.00%	-100.0%
Dec 1997	80.78%	-12.2%
Sep 1997	92.05%	-0.8%
Jun 1997	92.75%	+0.6%
Mar 1997	92.19%	+15.7%
Dec 1996	79.65%	-14.6%
Sep 1996	93.29%	-6.5%
Jun 1996	99.76%	+1.5%
Mar 1996	98.26%	-1.2%
Sep 1995	99.41%	-0.3%
Jun 1995	99.69%	+0.3%
Mar 1995	99.38%	+25.9%
Dec 1994	78.93%	-20.8%
Sep 1994	99.69%	+0.6%
Jun 1994	99.09%	+0.8%
Mar 1994	98.30%	+2.1%
Dec 1993	96.31%	+0.1%
Sep 1993	96.17%	+1.7%
Jun 1993	94.52%	-2.5%
Mar 1993	96.92%	-47.5%
Dec 1992	184.47%	+249.6%
Sep 1992	52.77%	+229.4%
Jun 1992	16.02%	-24.1%
Mar 1992	21.12%	-9.7%
Dec 1991	23.38%	-3.9%
Sep 1991	24.32%	-29.8%
Jun 1991	34.64%	-1.6%
Mar 1991	35.22%	-2.8%
Dec 1990	36.23%	+41.5%
Sep 1990	25.60%	+18.1%
Jun 1990	21.67%	-32.7%
Mar 1990	32.20%	+1,106.0%
Dec 1989	2.67%	-6.6%
Sep 1989	2.86%	-

FAQ

What is the current quarterly gross margin of BIIB?: As of today, BIIB quarterly gross margin is 63.23%
What is BIIB quarterly gross margin most recent change?: BIIB quarterly gross margin was up +3.03% on September 30, 2026
What is 1-year change in BIIB quarterly gross margin?: BIIB quarterly gross margin is down -1.65% year-over-year
How far is BIIB quarterly gross margin from its all-time high?: BIIB quarterly gross margin is currently -65.72% below its historical high of 184.47% set on December 31, 1992
How does BIIB quarterly gross margin rank versus sector peers?: BIIB quarterly gross margin is higher than 59.58% of companies in Healthcare sector
When is BIIB next earnings release?: The next earnings release for BIIB is on February 5, 2027

Gross Margin Formula

Gross Margin = Gross Profit

Revenue × 100%

Data Sources & References

BIIB Official Website www.biogen.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/875045/000087504526000013/0000875045-26-000013-index.htm
BIIB Profile on Yahoo Finance finance.yahoo.com/quote/BIIB
BIIB Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/biib