ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in IRWD — Ironwood Pharmaceuticals Inc
CIK 1164508
BOSTON, MA
Position in IRWD
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$12,701,944
+$777,625 QoQ
Shares Held
3,017,089
-11.2% QoQ
Ownership
1.83%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#18
of 212 holders
Holding Since
Mar 2020
12 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IRWD Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Jun 30, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $921,160,135 across 28 Drug Manufacturers - Specialty & Generic names. IRWD ranks #12 (1.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ZTS |
Zoetis Inc.
|
3,137,442 | $225,456,582 | |
| 2 | VTRS |
Viatris Inc
|
8,371,218 | $132,934,941 | |
| 3 | HLN |
Haleon plc
|
14,181,817 | $132,316,352 | |
| 4 | INDV |
Indivior Pharmaceuticals, Inc.
|
1,642,086 | $67,374,788 | |
| 5 | KNSA |
Kiniksa Pharmaceuticals International, plc
|
957,514 | $61,233,020 | |
| 6 | TAK |
Takeda Pharmaceutical Co Ltd
|
3,732,924 | $59,838,771 | |
| 7 | ANIP |
Ani Pharmaceuticals Inc
|
562,016 | $46,523,684 | |
| 8 | ELAN |
Elanco Animal Health Inc
|
1,872,157 | $46,073,783 |
All Filings in IRWD
Export CSV
12 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $12,701,944 | 3,017,089 | Shares | Defined | 2026-08-13 | |
| 2026-03-31 | $11,924,319 | 3,397,242 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $1,388,645 | 412,061 | Shares | Defined | 2026-02-13 | |
| 2024-03-31 | $1,531,017 | 175,777 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $1,882,417 | 164,547 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $1,116,011 | 115,889 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $248,603 | 23,365 | Shares | Defined | 2023-08-14 | |
| 2021-12-31 | $3,213,962 | 275,640 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $9,608,516 | 735,721 | Shares | Defined | 2021-11-12 | |
| 2020-12-31 | $4,266,340 | 374,569 | Shares | Defined | 2021-02-12 | |
| 2020-06-30 | $294,625 | 28,549 | Shares | Defined | 2020-08-12 | |
| 2020-03-31 | $152,359 | 15,100 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||