Biogen (BIIB) Shares Outstanding (2009 - 2026)
Biogen (BIIB) recorded Shares Outstanding of 147.7 million in Q2 2026, up 0.8% from 146.5 million a year earlier and up 0.3% from the prior quarter.
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Analysis
Biogen (BIIB) Shares Outstanding (2009 - 2026) Analysis & Trends
For FY2025, Biogen reported Shares Outstanding of 146.5 million, up 0.6% from FY2024.
- Annual Shares Outstanding has a five-year compound annual growth rate of -1.9% (FY2020 to FY2025).
- Across earlier years, Shares Outstanding came in at 145.6 million in FY2024 (+0.6%), 144.7 million in FY2023 (-0.4%), 145.3 million in FY2022 (-2.5%) and 149.1 million in FY2021 (-7.3%).
- The Q2 2026 figure is the highest quarterly Shares Outstanding since Q4 2021.
- On a year-over-year basis, Shares Outstanding has increased for ten consecutive quarters, with growth averaging 0.7% over the last eight quarters.
- Peak year-over-year performance for Shares Outstanding in the last five years was growth of 0.8% in Q2 2026, against a decline of 7.3% in Q4 2021 at the low end.
- Per Business Quant, the preceding three quarters came in at 147.2 million (Q1 2026), 146.5 million (Q4 2025) and 146.6 million (Q3 2025).
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Shares Outstanding (Qtr) |
|---|---|---|---|---|---|
| 1 | Eli Lilly | 1,077.67 Bn | 1,046.25 Bn | 19.71 Bn | 892.40 Mn |
| 2 | Johnson & Johnson | 609.51 Bn | 528.04 Bn | 17.26 Bn | 2.41 Bn |
| 3 | AbbVie | 469.66 Bn | 442.82 Bn | 12.70 Bn | 1.77 Bn |
| 4 | Merck | 344.22 Bn | 298.65 Bn | 12.21 Bn | 2.47 Bn |
| 5 | Novartis Ag | 268.86 Bn | 224.73 Bn | 11.24 Bn | 1.94 Bn |
| 6 | Astrazeneca | 242.61 Bn | 216.17 Bn | 12.86 Bn | 1.55 Bn |
| 7 | Amgen | 217.85 Bn | 173.25 Bn | 7.24 Bn | 540.00 Mn |
| 8 | Gilead Sciences | 179.49 Bn | 153.60 Bn | 6.22 Bn | 1.24 Bn |
| 9 | Pfizer | 156.23 Bn | 103.18 Bn | 10.94 Bn | 5.70 Bn |
| 10 | Biogen | 33.04 Bn | 19.69 Bn | 1.96 Bn | 147.70 Mn |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | 147.70 Mn |
| Mar 31, 2026 | 147.20 Mn |
| Dec 31, 2025 | 146.50 Mn |
| Sep 30, 2025 | 146.60 Mn |
| Jun 30, 2025 | 146.50 Mn |
| Mar 31, 2025 | 146.10 Mn |
| Dec 31, 2024 | 145.60 Mn |
| Sep 30, 2024 | 145.70 Mn |
| Jun 30, 2024 | 145.60 Mn |
| Mar 31, 2024 | 145.20 Mn |
| Dec 31, 2023 | 144.70 Mn |
| Sep 30, 2023 | 144.80 Mn |
| Jun 30, 2023 | 144.70 Mn |
| Mar 31, 2023 | 144.40 Mn |
| Dec 31, 2022 | 145.30 Mn |
| Sep 30, 2022 | 144.40 Mn |
| Jun 30, 2022 | 145.90 Mn |
| Mar 31, 2022 | 147.10 Mn |
| Dec 31, 2021 | 149.10 Mn |
| Sep 30, 2021 | 148.00 Mn |
API Access
Biogen Shares Outstanding API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=shares-outstanding&ticker=BIIB&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "shares-outstanding", "ticker": "BIIB", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=shares-outstanding&ticker=BIIB&period=max&api_key=YOUR_API_KEY");
const data = await res.json();