What is the current annual operating margin of BIIB?

As of today, BIIB annual operating margin is 27.90%

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

BIIB annual operating margin is up +21.73% year-over-year

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

BIIB annual operating margin is up +15.72% over the past 3 years

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

BIIB annual operating margin is currently -47.27% below its historical high of 52.91% set on December 31, 2002

How does BIIB annual operating margin rank versus sector peers?

BIIB annual operating margin is higher than 93.82% 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 operating margin of BIIB?

As of today, BIIB quarterly operating margin is 16.50%

What is BIIB quarterly operating margin most recent change?

BIIB quarterly operating margin was down -1.26% on September 30, 2026

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

BIIB quarterly operating margin is down -34.00% year-over-year

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

BIIB quarterly operating margin is currently -97.45% below its historical high of 646.36% set on December 31, 2000

How does BIIB quarterly operating margin rank versus sector peers?

BIIB quarterly operating margin is higher than 82.47% 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) Operating Margin History & Chart

Annual Operating Margin

27.90%4.98%+21.73%

December 31, 2025

Summary

Current Value: As of today, BIIB annual operating margin is 27.90%, up +21.73% on December 31, 2025
Historical Performance: BIIB annual operating margin is up +15.72% over the past 3 years, down -9.30% over the past 5 years
All-Time High Comparison: BIIB annual operating margin is currently -47.27% below its historical high of 52.91% set on December 31, 2002
3-Year Low Comparison: BIIB annual operating margin is +61.09% above its 3-year low of 17.32% reached on December 31, 2023
Sector Comparison: BIIB annual operating margin is higher than 93.82% of companies in Healthcare sector

Operating Margin Chart

beforeafter

Performance

BIIB Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Operating Margin	Dec 31, 25	27.90%	+21.7%	+15.7%	-9.3%	+57.9%
Quarterly Operating Margin	Sep 30, 26	16.50%	-34.0%	+111.3%	-38.7%	-33.5%
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 Operating Profit	Dec 31, 25	$2.76B	+29.9%	+21.3%	-27.4%	+308.6%
Annual Gross Margin	Dec 31, 25	75.69%	+11.6%	+7.6%	-7.3%	-10.0%
Annual Net Margin	Dec 31, 25	13.07%	-25.8%	-58.4%	-60.2%	-44.3%

Operating Margin Highs

BIIB Annual Operating Margin Highs Comparison
Period	High	Date	Current
3Y	27.90%	Dec 31, 25	at high
5Y	30.76%	N/A	-9.3%
All	52.91%	Dec 31, 02	-47.3%

Operating Margin Lows

BIIB Annual Operating Margin Lows Comparison
Period	Low	Date	Current
3Y	17.32%	Dec 31, 23	+61.1%
5Y	17.32%	Dec 31, 23	+61.1%
All	-454.69%	Dec 31, 86	+106.1%

Operating Margin History

Year	Value	Change
2025	27.90%	+21.7%
2024	22.92%	+32.3%
2023	17.32%	-28.2%
2022	24.11%	-12.5%
2021	27.54%	-10.5%
2020	30.76%	-32.9%
2019	45.85%	+7.1%
2018	42.83%	-0.6%
2017	43.09%	-1.6%
2016	43.81%	+14.3%
2015	38.32%	+15.5%
2014	33.17%	+37.1%
2013	24.20%	+39.6%
2012	17.34%	-22.6%
2011	22.41%	+26.8%
2010	17.67%	+13.0%
2009	15.64%	+3.6%
2008	15.10%	+48.2%
2007	10.19%	+10.5%
2006	9.22%	-42.8%
2005	16.12%	+256.6%

Year	Value	Change
2004	4.52%	-77.7%
2003	20.23%	-61.8%
2002	52.91%	+10.0%
2001	48.09%	+50.2%
2000	32.02%	+6.0%
1999	30.21%	+102.2%
1998	14.94%	+129.6%
1997	-50.41%	-178.4%
1996	-18.11%	+13.8%
1995	-21.00%	+91.6%
1994	-248.77%	-207.9%
1993	-80.79%	+66.3%
1992	-239.89%	-116.5%
1991	-110.80%	-7,025.0%
1990	1.60%	+105.1%
1989	-31.58%	+45.3%
1988	-57.77%	+79.5%
1987	-281.40%	+38.1%
1986	-454.69%	-108.7%
1985	-217.88%	-147.0%
1984	-88.21%	-

FAQ

What is the current annual operating margin of BIIB?: As of today, BIIB annual operating margin is 27.90%
What is 1-year change in BIIB annual operating margin?: BIIB annual operating margin is up +21.73% year-over-year
What is 3-year change in BIIB annual operating margin?: BIIB annual operating margin is up +15.72% over the past 3 years
How far is BIIB annual operating margin from its all-time high?: BIIB annual operating margin is currently -47.27% below its historical high of 52.91% set on December 31, 2002
How does BIIB annual operating margin rank versus sector peers?: BIIB annual operating margin is higher than 93.82% of companies in Healthcare sector
When is BIIB next annual earnings release?: The next annual earnings release for BIIB is on February 5, 2027

Operating Margin Formula

Operating Profit Margin = Operating Income

Revenue × 100%

Quarterly Operating Margin

16.50%0.21%-1.26%

September 30, 2026

Summary

Current Value: As of today, BIIB quarterly operating margin is 16.50%, down -1.26% on September 30, 2026
Historical Performance: BIIB quarterly operating margin is down -34.00% year-over-year, up +111.27% over the past 3 years
All-Time High Comparison: BIIB quarterly operating margin is currently -97.45% below its historical high of 646.36% set on December 31, 2000
3-Year Low Comparison: BIIB quarterly operating margin is +111.27% above its 3-year low of 7.81% reached on an earlier date
Sector Comparison: BIIB quarterly operating margin is higher than 82.47% of companies in Healthcare sector

Performance

BIIB Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Operating Margin	Sep 30, 26	16.50%	-1.3%	-34.0%	+111.3%	-38.7%
Annual Operating Margin	Dec 31, 25	27.90%	–	+21.7%	+15.7%	-9.3%
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 Operating Profit	Sep 30, 26	$444.10M	+1.4%	-27.6%	+133.5%	-37.7%
Quarterly Gross Margin	Sep 30, 26	63.23%	+3.0%	-1.6%	-6.7%	-16.4%
Quarterly Net Margin	Sep 30, 26	-0.77%	-120.7%	-104.0%	+72.5%	-106.4%

Quarterly Operating Margin Highs

BIIB Quarterly Operating Margin Highs Comparison
Period	High	Date	Current
1Y	25.00%	N/A	-34.0%
3Y	33.04%	Jun 30, 25	-50.1%
5Y	33.04%	Jun 30, 25	-50.1%
All	646.36%	Dec 31, 00	-97.5%

Quarterly Operating Margin Lows

BIIB Quarterly Operating Margin Lows Comparison
Period	Low	Date	Current
1Y	16.50%	Sep 30, 26	at low
3Y	7.81%	N/A	+111.3%
5Y	7.81%	Sep 30, 23	+111.3%
All	-4,337.50%	Dec 31, 86	+100.4%

Quarterly Operating Margin History

Month	Value	Change
Sep 2026	16.50%	-1.3%
Jun 2026	16.71%	-12.6%
Mar 2026	19.12%	+12.1%
Dec 2025	17.06%	-31.8%
Sep 2025	25.00%	-24.3%
Jun 2025	33.04%	+31.2%
Mar 2025	25.18%	+50.7%
Dec 2024	16.71%	-19.9%
Sep 2024	20.87%	-24.7%
Jun 2024	27.73%	+11.9%
Mar 2024	24.79%	+34.1%
Dec 2023	18.49%	+136.7%
Sep 2023	7.81%	-68.0%
Jun 2023	24.38%	+28.4%
Mar 2023	18.99%	-7.7%
Dec 2022	20.58%	-27.9%
Sep 2022	28.55%	-8.8%
Jun 2022	31.29%	+102.5%
Mar 2022	15.45%	+7.1%
Dec 2021	14.42%	-46.4%
Sep 2021	26.91%	-23.7%
Jun 2021	35.29%	+8.9%
Mar 2021	32.42%	+114.0%
Dec 2020	-231.08%	-907.4%
Sep 2020	28.62%	-44.1%
Jun 2020	51.17%	+1.1%
Mar 2020	50.61%	+19.0%
Dec 2019	42.54%	-14.5%
Sep 2019	49.77%	+0.5%
Jun 2019	49.51%	+19.2%
Mar 2019	41.52%	-6.0%
Dec 2018	44.17%	-10.8%
Sep 2018	49.53%	+52.5%
Jun 2018	32.48%	-27.9%
Mar 2018	45.02%	+8.6%
Dec 2017	41.44%	-18.7%
Sep 2017	50.96%	+36.6%
Jun 2017	37.31%	+27.7%
Mar 2017	29.22%	-38.7%
Dec 2016	47.67%	+10.1%
Sep 2016	43.30%	-2.2%
Jun 2016	44.29%	-0.3%
Mar 2016	44.44%	+0.5%
Dec 2015	44.24%	+5.9%
Sep 2015	41.77%	+7.3%
Jun 2015	38.93%	+10.2%
Mar 2015	35.34%	-19.2%
Dec 2014	43.73%	+16.3%
Sep 2014	37.60%	+13.5%
Jun 2014	33.12%	+42.5%
Mar 2014	23.25%	-1.8%
Dec 2013	23.68%	-8.7%
Sep 2013	25.95%	-1.3%
Jun 2013	26.30%	-4.1%
Mar 2013	27.43%	+83.2%
Dec 2012	14.97%	-31.5%
Sep 2012	21.85%	+1.5%
Jun 2012	21.52%	+105.5%
Mar 2012	10.47%	-45.7%
Dec 2011	19.29%	-22.2%
Sep 2011	24.81%	+40.9%
Jun 2011	17.61%	-9.6%
Mar 2011	19.49%	-41.8%
Dec 2010	33.46%	+149.1%
Sep 2010	13.43%	-14.8%
Mar 2010	15.76%	-29.0%
Dec 2009	22.20%	+5.1%
Sep 2009	21.12%	+467.7%
Jun 2009	3.72%	-75.1%
Mar 2009	14.95%	+29.1%
Dec 2008	11.58%	+87.4%
Sep 2008	6.18%	-60.5%
Jun 2008	15.64%	+2.7%
Mar 2008	15.23%	-17.9%
Dec 2007	18.55%	+1,666.7%
Sep 2007	1.05%	-87.9%

Month	Value	Change
Jun 2007	8.69%	-13.2%
Mar 2007	10.01%	+12.1%
Dec 2006	8.93%	-18.3%
Sep 2006	10.93%	+63.9%
Jun 2006	6.67%	-35.3%
Mar 2006	10.31%	+441.4%
Dec 2005	-3.02%	+83.7%
Sep 2005	-18.58%	-192.3%
Jun 2005	20.12%	+45.2%
Mar 2005	13.86%	+34.4%
Dec 2004	10.31%	-30.8%
Sep 2004	14.90%	>+9,900.0%
Jun 2004	-0.12%	+99.2%
Mar 2004	-14.71%	-26.6%
Dec 2003	-11.62%	-122.5%
Sep 2003	51.54%	+37.7%
Jun 2003	37.43%	-30.5%
Mar 2003	53.85%	-1.9%
Dec 2002	54.90%	+4.9%
Sep 2002	52.36%	+5.6%
Jun 2002	49.57%	-0.8%
Mar 2002	49.95%	+1.5%
Dec 2001	49.19%	-1.9%
Sep 2001	50.13%	+6.7%
Jun 2001	46.99%	+13.7%
Mar 2001	41.32%	-93.6%
Dec 2000	646.36%	+1,639.9%
Sep 2000	37.15%	+15.8%
Jun 2000	32.07%	>+9,900.0%
Mar 2000	0.00%	+100.0%
Dec 1999	-4.84%	-114.6%
Sep 1999	33.06%	-41.7%
Jun 1999	56.73%	+171.2%
Mar 1999	20.92%	-15.0%
Sep 1998	24.60%	-62.6%
Jun 1998	65.71%	+88.2%
Mar 1998	34.91%	-25.6%
Dec 1997	46.92%	+65.6%
Sep 1997	28.33%	-7.2%
Jun 1997	30.52%	+21.1%
Mar 1997	25.21%	+6.8%
Dec 1996	23.60%	-37.6%
Sep 1996	37.81%	+224.6%
Jun 1996	-30.34%	-30.4%
Mar 1996	-23.26%	-188.5%
Dec 1995	26.27%	+430.0%
Sep 1995	-7.96%	+25.6%
Jun 1995	-10.70%	-280.8%
Mar 1995	-2.81%	-111.8%
Dec 1994	23.74%	+128.8%
Sep 1994	-82.39%	-771.9%
Jun 1994	-9.45%	-141.4%
Mar 1994	22.82%	+225.5%
Dec 1993	-18.18%	-176.1%
Sep 1993	23.89%	-8.9%
Jun 1993	26.22%	-9.3%
Mar 1993	28.92%	-37.4%
Dec 1992	46.21%	+99.0%
Sep 1992	23.22%	+261.7%
Jun 1992	-14.36%	-21.7%
Mar 1992	-11.80%	-21.1%
Dec 1991	-9.74%	-31.1%
Sep 1991	-7.43%	-479.1%
Jun 1991	1.96%	-71.7%
Mar 1991	6.92%	-31.8%
Dec 1990	10.14%	+522.5%
Sep 1990	-2.40%	+64.0%
Jun 1990	-6.67%	-494.7%
Mar 1990	1.69%	+103.8%
Dec 1989	-44.00%	-10.0%
Sep 1989	-40.00%	+91.7%
Dec 1988	-480.36%	+72.1%
Dec 1987	-1,722.22%	+60.3%
Dec 1986	-4,337.50%	-178.9%
Dec 1985	-1,555.17%	-206.7%
Dec 1984	-507.04%	-

FAQ

What is the current quarterly operating margin of BIIB?: As of today, BIIB quarterly operating margin is 16.50%
What is BIIB quarterly operating margin most recent change?: BIIB quarterly operating margin was down -1.26% on September 30, 2026
What is 1-year change in BIIB quarterly operating margin?: BIIB quarterly operating margin is down -34.00% year-over-year
How far is BIIB quarterly operating margin from its all-time high?: BIIB quarterly operating margin is currently -97.45% below its historical high of 646.36% set on December 31, 2000
How does BIIB quarterly operating margin rank versus sector peers?: BIIB quarterly operating margin is higher than 82.47% of companies in Healthcare sector
When is BIIB next earnings release?: The next earnings release for BIIB is on February 5, 2027

Operating Margin Formula

Operating Profit Margin = Operating Income

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