Position in MGNX
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$2,261,765
+$595,170 QoQ
Shares Held
782,618
-24.4% QoQ
Ownership
1.23%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MGNX Over Time
Shares Held
Position Value (USD)
Derivatives in MGNX
reported options exposure · as of Mar 31, 2026CallValue
$167,042
CallShares
57,800
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Biotechnology
Healthcare · as of Mar 31, 2026CITADEL ADVISORS LLC holds $5,784,241,435 across 374 Biotechnology names. MGNX ranks #191 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | INSM |
INSMED Inc
|
2,182,571 | $356,894,009 | |
| 2 | ONC |
BeOne Medicines Ltd.
|
1,032,298 | $306,561,536 | |
| 3 | BMRN |
Biomarin Pharmaceutical Inc
|
4,512,634 | $254,918,694 | |
| 4 | JAZZ |
Jazz Pharmaceuticals plc
|
1,259,444 | $238,097,887 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
453,843 | $237,573,195 | |
| 6 | BBIO |
BridgeBio Pharma, Inc.
|
3,173,940 | $235,696,783 | |
| 7 | TERN |
Terns Pharmaceuticals, Inc.
|
3,218,810 | $169,695,662 | |
| 8 | PTGX |
Protagonist Therapeutics, Inc
|
1,551,900 | $163,570,260 |
All Filings in MGNX
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $167,042 | 57,800 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $2,261,765 | 782,618 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $138,943 | 86,300 | Call | Defined | 2026-02-17 | |
| 2025-12-31 | $1,666,595 | 1,035,153 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $45,864 | 27,300 | Put | Defined | 2025-11-14 | |
| 2025-09-30 | $829,131 | 493,531 | Shares | Defined | 2025-11-14 | |
| 2025-09-30 | $50,064 | 29,800 | Call | Defined | 2025-11-14 | |
| 2025-06-30 | $17,908 | 14,800 | Put | Defined | 2025-08-14 | |
| 2025-06-30 | $207,609 | 171,578 | Shares | Defined | 2025-08-14 | |
| 2025-06-30 | $42,229 | 34,900 | Call | Defined | 2025-08-14 | |
| 2025-03-31 | $129,921 | 102,300 | Put | Defined | 2025-05-15 | |
| 2025-03-31 | $42,164 | 33,200 | Call | Defined | 2025-05-15 | |
| 2024-12-31 | $91,975 | 28,300 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $88,075 | 27,100 | Put | Defined | 2025-02-14 | |
| 2024-09-30 | $191,478 | 58,200 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $218,456 | 66,400 | Call | Defined | 2024-11-14 | |
| 2024-06-30 | $78,918 | 18,569 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $241,825 | 56,900 | Call | Defined | 2024-08-14 | |
| 2024-06-30 | $156,825 | 36,900 | Put | Defined | 2024-08-14 | |
| 2024-03-31 | $5,361,524 | 364,234 | Shares | Defined | 2024-05-15 | |
| 2024-03-31 | $419,520 | 28,500 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $833,152 | 56,600 | Call | Defined | 2024-05-15 | |
| 2023-12-31 | $49,062 | 5,100 | Put | Defined | 2024-02-14 | |
| 2023-12-31 | $42,328 | 4,400 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $1,755,495 | 182,484 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $1,398 | 300 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $18,174 | 3,900 | Put | Defined | 2023-11-14 | |
| 2023-09-30 | $515,312 | 110,582 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $61,525 | 11,500 | Call | Defined | 2023-08-14 | |
| 2023-06-30 | $1,317,726 | 246,304 | Shares | Defined | 2023-08-14 | |
| 2023-06-30 | $41,195 | 7,700 | Put | Defined | 2023-08-14 | |
| 2023-03-31 | $34,416 | 4,800 | Put | Defined | 2023-05-15 | |
| 2023-03-31 | $206,496 | 28,800 | Call | Defined | 2023-05-15 | |
| 2023-03-31 | $1,785,129 | 248,972 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $52,338 | 7,800 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $3,066,764 | 457,044 | Shares | Defined | 2023-02-14 | |
| 2022-12-31 | $36,234 | 5,400 | Call | Defined | 2023-02-14 | |
| 2022-09-30 | $1,608,999 | 465,029 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $3,222,724 | 1,092,449 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $952,025 | 108,062 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $165,315 | 10,300 | Put | Defined | 2022-02-14 | |
| 2021-12-31 | $1,142,021 | 71,154 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $728,712 | 34,800 | Put | Defined | 2021-11-15 | |
| 2021-09-30 | $714,054 | 34,100 | Call | Defined | 2021-11-15 | |
| 2021-09-30 | $18,302,250 | 874,033 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $918,612 | 34,200 | Put | Defined | 2021-08-16 | |
| 2021-06-30 | $636,582 | 23,700 | Call | Defined | 2021-08-16 | |
| 2021-06-30 | $21,159,716 | 787,778 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $996,905 | 31,300 | Call | Defined | 2021-05-21 | |
| 2021-03-31 | $73,908,434 | 2,320,516 | Shares | Defined | 2021-05-21 | |
| No filing history on record for this holder in this stock. | ||||||