Position in IRWD
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$15,882,974
+$974,088 QoQ
Shares Held
4,525,064
+2.3% QoQ
Ownership
2.75%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
13 quarters on record
Voting authority
Sole 0.ToString("F0")%
Shared 100.ToString("F0")%
None 0.ToString("F0")%
Common Shares in IRWD Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Mar 31, 2026MARSHALL WACE, LLP holds $558,161,566 across 33 Drug Manufacturers - Specialty & Generic names. IRWD ranks #12 (2.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VTRS |
Viatris Inc
|
9,349,817 | $126,316,026 | |
| 2 | NBIX |
Neurocrine Biosciences Inc
|
508,977 | $67,052,628 | |
| 3 | LNTH |
Lantheus Holdings, Inc.
|
611,747 | $46,401,008 | |
| 4 | UTHR |
UNITED THERAPEUTICS Corp
|
75,977 | $45,052,841 | |
| 5 | RDY |
Dr Reddys Laboratories Ltd
|
2,664,306 | $36,900,638 | |
| 6 | ALKS |
Alkermes plc.
|
999,322 | $35,336,024 | |
| 7 | ELAN |
Elanco Animal Health Inc
|
1,382,412 | $33,081,118 | |
| 8 | COLL |
Collegium Pharmaceutical, Inc
|
748,812 | $24,763,212 |
All Filings in IRWD
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13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $15,882,974 | 4,525,064 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $14,908,886 | 4,424,002 | Shares | Other | 2026-02-13 | |
| 2025-09-30 | $4,118,821 | 3,144,139 | Shares | Other | 2025-11-13 | |
| 2025-06-30 | $2,875,361 | 3,993,557 | Shares | Other | 2025-08-13 | |
| 2025-03-31 | $819,555 | 557,521 | Shares | Other | 2025-05-15 | |
| 2024-06-30 | $1,416,261 | 217,218 | Shares | Other | 2024-08-14 | |
| 2024-03-31 | $4,986,475 | 572,500 | Shares | Other | 2024-05-15 | |
| 2023-12-31 | $3,292,660 | 287,820 | Shares | Other | 2024-02-14 | |
| 2023-09-30 | $1,422,784 | 147,745 | Shares | Other | 2023-11-14 | |
| 2021-03-31 | $149,253 | 13,350 | Shares | Sole | 2021-05-17 | |
| 2020-09-30 | $1,565,015 | 174,084 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $1,162,486 | 112,644 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $1,698,106 | 168,296 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||