Position in BIIB
as of Jun 30, 2026
· filed Jul 31, 2026
Position Value
$7,535,956
+$1,022,792 QoQ
Shares Held
34,879
-1.8% QoQ
Ownership
0.024%
of shares outstanding
% of Portfolio
0.04%
of 13F equity value
Holder Rank
#207
of 1,036 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in BIIB Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - General
Healthcare · as of Jun 30, 2026Calamos Advisors LLC holds $812,352,405 across 9 Drug Manufacturers - General names. BIIB ranks #8 (0.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | LLY |
ELI LILLY & Co
|
283,001 | $339,439,917 | |
| 2 | JNJ |
Johnson & Johnson
|
647,222 | $164,374,971 | |
| 3 | ABBV |
AbbVie Inc.
|
399,893 | $100,629,074 | |
| 4 | MRK |
Merck & Co., Inc.
|
650,503 | $83,589,635 | |
| 5 | GILD |
Gilead Sciences, Inc.
|
356,488 | $45,038,693 | |
| 6 | PFE |
Pfizer Inc
|
1,753,548 | $42,225,435 | |
| 7 | AMGN |
Amgen Inc
|
68,480 | $24,797,977 | |
| 8 | BIIB |
Biogen Inc.
This page
|
34,879 | $7,535,956 |
All Filings in BIIB
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $7,535,956 | 34,879 | Shares | Sole | 2026-07-31 | |
| 2026-03-31 | $6,513,164 | 35,527 | Shares | Sole | 2026-05-04 | |
| 2025-12-31 | $6,252,396 | 35,527 | Shares | Sole | 2026-01-29 | |
| 2025-09-30 | $5,178,757 | 36,970 | Shares | Sole | 2025-10-20 | |
| 2025-06-30 | $4,643,062 | 36,970 | Shares | Sole | 2025-08-08 | |
| 2025-03-31 | $5,058,974 | 36,970 | Shares | Sole | 2025-04-29 | |
| 2024-12-31 | $5,590,449 | 36,558 | Shares | Sole | 2025-01-24 | |
| 2024-09-30 | $7,086,402 | 36,558 | Shares | Sole | 2024-11-07 | |
| 2024-06-30 | $8,682,818 | 37,455 | Shares | Sole | 2024-07-25 | |
| 2024-03-31 | $8,371,187 | 38,822 | Shares | Sole | 2024-05-08 | |
| 2023-12-31 | $10,298,528 | 39,798 | Shares | Sole | 2024-01-31 | |
| 2023-09-30 | $10,362,129 | 40,318 | Shares | Sole | 2023-10-26 | |
| 2023-06-30 | $11,484,582 | 40,318 | Shares | Sole | 2023-07-28 | |
| 2023-03-31 | $11,209,613 | 40,318 | Shares | Sole | 2023-05-04 | |
| 2022-12-31 | $12,560,814 | 45,359 | Shares | Sole | 2023-01-26 | |
| 2022-09-30 | $14,252,193 | 53,379 | Shares | Sole | 2022-10-24 | |
| 2022-06-30 | $10,886,113 | 53,379 | Shares | Sole | 2022-08-01 | |
| 2022-03-31 | $10,938,774 | 51,941 | Shares | Sole | 2022-05-03 | |
| 2021-12-31 | $10,800,718 | 45,018 | Shares | Sole | 2022-02-01 | |
| 2021-09-30 | $12,246,392 | 43,275 | Shares | Sole | 2021-10-26 | |
| 2021-06-30 | $13,662,775 | 39,457 | Shares | Sole | 2021-07-22 | |
| 2021-03-31 | $9,206,572 | 32,910 | Shares | Sole | 2021-04-12 | |
| 2020-12-31 | $7,823,766 | 31,952 | Shares | Sole | 2021-01-27 | |
| 2020-09-30 | $9,444,558 | 33,293 | Shares | Sole | 2020-10-26 | |
| 2020-06-30 | $9,643,839 | 36,045 | Shares | Sole | 2020-07-27 | |
| 2020-03-31 | $12,094,574 | 38,228 | Shares | Sole | 2020-04-28 | |
| No filing history on record for this holder in this stock. | ||||||