Position in BIIB
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$352,645,701
+$83,624,575 QoQ
Shares Held
1,923,557
+25.8% QoQ
Ownership
1.30%
of shares outstanding
% of Portfolio
0.17%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 93.89594381658563.ToString("F0")%
Shared 0.ToString("F0")%
None 6.1040561834143725.ToString("F0")%
Common Shares in BIIB Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - General
Healthcare · as of Mar 31, 2026AQR CAPITAL MANAGEMENT LLC holds $5,739,029,995 across 16 Drug Manufacturers - General names. BIIB ranks #5 (6.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BMY |
Bristol Myers Squibb Co
|
29,631,105 | $1,797,126,513 | |
| 2 | MRK |
Merck & Co., Inc.
|
8,628,486 | $1,037,920,575 | |
| 3 | JNJ |
Johnson & Johnson
|
3,543,181 | $866,095,157 | |
| 4 | LLY |
ELI LILLY & Co
|
855,420 | $786,789,649 | |
| 5 | BIIB |
Biogen Inc.
This page
|
1,923,557 | $352,645,701 | |
| 6 | PFE |
Pfizer Inc
|
11,879,235 | $333,568,912 | |
| 7 | ABBV |
AbbVie Inc.
|
888,913 | $193,329,684 | |
| 8 | GILD |
Gilead Sciences, Inc.
|
1,164,803 | $162,338,589 |
All Filings in BIIB
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25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $352,645,701 | 1,923,557 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $269,021,126 | 1,528,616 | Shares | Other | 2026-02-17 | |
| 2025-09-30 | $249,844,024 | 1,783,581 | Shares | Other | 2025-11-14 | |
| 2025-06-30 | $171,405,856 | 1,364,805 | Shares | Other | 2025-08-14 | |
| 2025-03-31 | $187,312,336 | 1,368,842 | Shares | Other | 2025-05-15 | |
| 2024-12-31 | $82,529,698 | 539,692 | Shares | Other | 2025-02-14 | |
| 2024-09-30 | $9,668,931 | 49,881 | Shares | Other | 2024-11-14 | |
| 2024-06-30 | $5,460,983 | 23,557 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $1,371,838 | 6,362 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $9,610,717 | 37,140 | Shares | Other | 2024-02-14 | |
| 2023-09-30 | $78,819,569 | 306,679 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $95,820,121 | 336,388 | Shares | Other | 2023-08-14 | |
| 2023-03-31 | $117,463,781 | 422,486 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $54,779,760 | 197,818 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $67,940,286 | 254,458 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $104,663,231 | 513,206 | Shares | Other | 2022-08-15 | |
| 2022-03-31 | $83,462,042 | 396,306 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $78,746,781 | 328,221 | Shares | Other | 2022-02-14 | |
| 2021-09-30 | $99,289,870 | 350,860 | Shares | Other | 2021-11-15 | |
| 2021-06-30 | $178,142,756 | 514,462 | Shares | Other | 2021-08-16 | |
| 2021-03-31 | $286,857,048 | 1,025,405 | Shares | Other | 2021-05-17 | |
| 2020-12-31 | $249,125,950 | 1,017,422 | Shares | Defined | 2021-02-16 | |
| 2020-09-30 | $628,914,303 | 2,216,985 | Shares | Other | 2020-11-16 | |
| 2020-06-30 | $598,287,550 | 2,236,171 | Shares | Other | 2020-08-17 | |
| 2020-03-31 | $670,765,778 | 2,120,127 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||