Latest Period
Q2 2026
Security Snapshot
BIOGEN INC. - COMMON STOCK (BIIB) Institutional Ownership
CUSIP: 09062X103
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
1,033
Shares (Excl. Options)
142,003,584
Price
$216.06
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- BIIB on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 142,003,584
- Total 13F value
- $30,650,106,970
- Portfolio coverage rank
- 0.01%
- Share change
- +7,504,067
- Value change
- +$1,659,026,130
- Number of holders
- 1,033
- Shares outstanding
- 147,536,480
- SEC-reported price per share
- $208.92
- Insider filing price
- $208.92
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- BIIB - BIOGEN INC. - COMMON STOCK is tracked under CUSIP 09062X103.
- 1033 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 1,008 to 1,033 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $24,728,256,134 to $30,650,106,970.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 1033 institutions filings for Q2 2026.
Security key
09062X103
Latest holder period
Q2 2026
13F holders
1,033
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
BIIB full holder history
BIOGEN INC. SEC filings
BIOGEN INC. company facts
BIOGEN INC. insider transactions
BIOGEN INC. 13D/G history
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 09062X103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
BIIB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 12% | +10% | $3,952,714,750 | +$354,673,077 | 18,294,524 | +9.9% | FMR LLC | 30 Jun 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | 10% | $2,094,853,956 | 14,954,697 | PRIMECAP MANAGEMENT CO/CA/ | 30 Sep 2025 | |||
| BlackRock, Inc. | 8.5% | $1,502,927,856 | 12,506,681 | BlackRock, Inc. | 31 Mar 2025 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 7.5% | $2,014,716,401 | 10,989,562 | Vanguard Capital Management | 31 Mar 2026 | |||
| STATE STREET CORP | 5% | $1,025,549,213 | 7,321,168 | STATE STREET CORPORATION | 30 Sep 2025 |
As of 30 Jun 2026, 1,033 institutional investors reported holding 142,003,584 shares of BIOGEN INC. - COMMON STOCK (BIIB). This represents 96% of the company’s total 147,536,480 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
72%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 12% | 18,217,239 | +42% | 0.17% | $3,936,016,552 |
| BlackRock, Inc. | 11% | 15,985,736 | +0.07% | 0.05% | $3,453,877,982 |
| PRIMECAP MANAGEMENT CO/CA/ | 10% | 15,154,606 | +2.7% | 1.9% | $3,274,304,389 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.5% | 9,651,117 | +1.2% | 0.04% | $2,085,220,339 |
| STATE STREET CORP | 5% | 7,344,327 | +2.5% | 0.05% | $1,586,815,292 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.5% | 6,604,936 | +1.1% | 0.06% | $1,427,062,472 |
| GEODE CAPITAL MANAGEMENT, LLC | 3% | 4,449,295 | +2.5% | 0.05% | $957,935,835 |
| WELLINGTON MANAGEMENT GROUP LLP | 2.1% | 3,117,469 | +5.3% | 0.12% | $673,560,352 |
| NORGES BANK | 1.7% | 2,580,033 | 0.06% | $557,441,930 | |
| MORGAN STANLEY | 1.6% | 2,411,271 | +11% | 0.03% | $520,979,947 |
| AQR CAPITAL MANAGEMENT LLC | 1.3% | 1,936,859 | +0.69% | 0.15% | $416,928,075 |
| JPMORGAN CHASE & CO | 1.2% | 1,823,140 | -9.6% | 0.02% | $394,947,245 |
| Invesco Ltd. | 1.2% | 1,803,944 | +3.4% | 0.03% | $389,760,120 |
| Amundi | 1% | 1,516,831 | +92% | 0.08% | $327,726,507 |
| Legal & General Group Plc | 1% | 1,493,289 | +11% | 0.07% | $322,640,021 |
| NORTHERN TRUST CORP | 0.97% | 1,429,490 | -1.2% | 0.04% | $308,855,610 |
| Boston Partners | 0.86% | 1,263,429 | -26% | 0.24% | $272,849,469 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.85% | 1,255,168 | -8.9% | 0.05% | $271,191,599 |
| GOLDMAN SACHS GROUP INC | 0.83% | 1,230,390 | +17% | 0.03% | $265,838,021 |
| DIMENSIONAL FUND ADVISORS LP | 0.78% | 1,148,568 | +6.4% | 0.04% | $248,165,892 |
| Pacer Advisors, Inc. | 0.76% | 1,122,981 | +70% | 0.63% | $242,631,000 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.76% | 1,117,663 | -2.8% | 0.03% | $241,482,267 |
| BANK OF AMERICA CORP /DE/ | 0.76% | 1,116,228 | -3.5% | 0.02% | $241,172,222 |
| UBS Group AG | 0.7% | 1,030,150 | +97% | 0.04% | $222,574,209 |
| Alyeska Investment Group, L.P. | 0.63% | 932,374 | +16% | 0.52% | $201,448,726 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 142,003,584 | $30,650,106,970 | +$1,659,026,130 | $216.06 | 1,033 |
| 2026 Q1 | 134,919,181 | $24,728,256,134 | -$862,038,776 | $183.33 | 1,008 |
| 2025 Q4 | 139,698,197 | $24,583,464,503 | +$1,492,805,786 | $175.99 | 994 |
| 2025 Q3 | 131,083,249 | $18,365,221,765 | +$165,798,563 | $140.08 | 894 |
| 2025 Q2 | 129,287,238 | $16,238,624,437 | +$284,309,412 | $125.59 | 856 |
| 2025 Q1 | 127,028,107 | $17,371,280,984 | -$578,239,538 | $136.84 | 865 |
| 2024 Q4 | 131,405,263 | $20,085,982,511 | +$272,768,825 | $152.92 | 861 |
| 2024 Q3 | 128,615,457 | $24,913,936,182 | -$143,640,766 | $193.84 | 903 |
| 2024 Q2 | 128,193,288 | $29,710,612,652 | -$84,741,446 | $231.82 | 933 |
| 2024 Q1 | 128,518,741 | $27,691,040,526 | +$55,007,555 | $215.63 | 932 |
| 2023 Q4 | 127,982,276 | $33,111,816,739 | +$901,376,761 | $258.77 | 993 |
| 2023 Q3 | 124,470,870 | $31,994,071,856 | -$470,206,356 | $257.01 | 954 |
| 2023 Q2 | 126,306,466 | $35,966,219,806 | +$277,366,431 | $284.85 | 994 |
| 2023 Q1 | 125,053,711 | $34,758,696,486 | +$300,589,329 | $278.03 | 987 |
| 2022 Q4 | 124,528,759 | $34,492,440,417 | +$242,887,240 | $276.92 | 1,018 |
| 2022 Q3 | 123,323,995 | $32,917,825,335 | +$384,787,916 | $267.00 | 966 |
| 2022 Q2 | 121,790,135 | $24,840,540,438 | -$152,960,663 | $203.94 | 911 |
| 2022 Q1 | 122,616,063 | $25,827,895,030 | -$220,078,557 | $210.60 | 941 |
| 2021 Q4 | 123,500,078 | $29,628,123,955 | -$101,746,917 | $239.92 | 996 |
| 2021 Q3 | 123,461,166 | $34,947,282,206 | -$614,669,326 | $282.99 | 1,026 |
| 2021 Q2 | 125,522,812 | $43,460,004,330 | -$566,581,701 | $346.27 | 1,091 |
| 2021 Q1 | 127,388,312 | $35,598,424,357 | -$380,775,241 | $279.75 | 1,079 |
| 2020 Q4 | 128,905,111 | $31,559,604,046 | -$521,085,738 | $244.86 | 1,047 |
| 2020 Q3 | 130,781,613 | $37,077,214,726 | -$1,220,436,591 | $283.68 | 1,036 |
| 2020 Q2 | 134,944,833 | $36,078,566,447 | -$2,622,299,974 | $267.55 | 1,048 |